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Add full copy of mozilla/pkcs7 module as internal dependency

Browse source 
The full contents of the git repository @432b2356ecb...
was copied. Only go.mod was removed from it.
This commit is contained in:
Herman Slatman 2021-02-25 22:28:08 +01:00 committed by max furman
parent 393be5b03a
commit 99cd3b74fe
17 changed files with 3485 additions and 0 deletions
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24
scep/pkcs7/.gitignore vendored Normal file
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# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof

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scep/pkcs7/.travis.yml Normal file
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language: go
go:
- "1.11"
- "1.12"
- "1.13"
- tip
before_install:
- make gettools
script:
- make

22
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The MIT License (MIT)
Copyright (c) 2015 Andrew Smith
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

20
scep/pkcs7/Makefile Normal file
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all: vet staticcheck test
test:
go test -covermode=count -coverprofile=coverage.out .
showcoverage: test
go tool cover -html=coverage.out
vet:
go vet .
lint:
golint .
staticcheck:
staticcheck .
gettools:
go get -u honnef.co/go/tools/...
go get -u golang.org/x/lint/golint

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# pkcs7
[![GoDoc](https://godoc.org/go.mozilla.org/pkcs7?status.svg)](https://godoc.org/go.mozilla.org/pkcs7)
[![Build Status](https://travis-ci.org/mozilla-services/pkcs7.svg?branch=master)](https://travis-ci.org/mozilla-services/pkcs7)
pkcs7 implements parsing and creating signed and enveloped messages.
```go
package main
import (
"bytes"
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"os"
"go.mozilla.org/pkcs7"
)
func SignAndDetach(content []byte, cert *x509.Certificate, privkey *rsa.PrivateKey) (signed []byte, err error) {
toBeSigned, err := NewSignedData(content)
if err != nil {
err = fmt.Errorf("Cannot initialize signed data: %s", err)
return
}
if err = toBeSigned.AddSigner(cert, privkey, SignerInfoConfig{}); err != nil {
err = fmt.Errorf("Cannot add signer: %s", err)
return
}
// Detach signature, omit if you want an embedded signature
toBeSigned.Detach()
signed, err = toBeSigned.Finish()
if err != nil {
err = fmt.Errorf("Cannot finish signing data: %s", err)
return
}
// Verify the signature
pem.Encode(os.Stdout, &pem.Block{Type: "PKCS7", Bytes: signed})
p7, err := pkcs7.Parse(signed)
if err != nil {
err = fmt.Errorf("Cannot parse our signed data: %s", err)
return
}
// since the signature was detached, reattach the content here
p7.Content = content
if bytes.Compare(content, p7.Content) != 0 {
err = fmt.Errorf("Our content was not in the parsed data:\n\tExpected: %s\n\tActual: %s", content, p7.Content)
return
}
if err = p7.Verify(); err != nil {
err = fmt.Errorf("Cannot verify our signed data: %s", err)
return
}
return signed, nil
}
```
## Credits
This is a fork of [fullsailor/pkcs7](https://github.com/fullsailor/pkcs7)

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package pkcs7
import (
"bytes"
"errors"
)
var encodeIndent = 0
type asn1Object interface {
EncodeTo(writer *bytes.Buffer) error
}
type asn1Structured struct {
tagBytes []byte
content []asn1Object
}
func (s asn1Structured) EncodeTo(out *bytes.Buffer) error {
//fmt.Printf("%s--> tag: % X\n", strings.Repeat("| ", encodeIndent), s.tagBytes)
encodeIndent++
inner := new(bytes.Buffer)
for _, obj := range s.content {
err := obj.EncodeTo(inner)
if err != nil {
return err
}
}
encodeIndent--
out.Write(s.tagBytes)
encodeLength(out, inner.Len())
out.Write(inner.Bytes())
return nil
}
type asn1Primitive struct {
tagBytes []byte
length int
content []byte
}
func (p asn1Primitive) EncodeTo(out *bytes.Buffer) error {
_, err := out.Write(p.tagBytes)
if err != nil {
return err
}
if err = encodeLength(out, p.length); err != nil {
return err
}
//fmt.Printf("%s--> tag: % X length: %d\n", strings.Repeat("| ", encodeIndent), p.tagBytes, p.length)
//fmt.Printf("%s--> content length: %d\n", strings.Repeat("| ", encodeIndent), len(p.content))
out.Write(p.content)
return nil
}
func ber2der(ber []byte) ([]byte, error) {
if len(ber) == 0 {
return nil, errors.New("ber2der: input ber is empty")
}
//fmt.Printf("--> ber2der: Transcoding %d bytes\n", len(ber))
out := new(bytes.Buffer)
obj, _, err := readObject(ber, 0)
if err != nil {
return nil, err
}
obj.EncodeTo(out)
// if offset < len(ber) {
// return nil, fmt.Errorf("ber2der: Content longer than expected. Got %d, expected %d", offset, len(ber))
//}
return out.Bytes(), nil
}
// encodes lengths that are longer than 127 into string of bytes
func marshalLongLength(out *bytes.Buffer, i int) (err error) {
n := lengthLength(i)
for ; n > 0; n-- {
err = out.WriteByte(byte(i >> uint((n-1)*8)))
if err != nil {
return
}
}
return nil
}
// computes the byte length of an encoded length value
func lengthLength(i int) (numBytes int) {
numBytes = 1
for i > 255 {
numBytes++
i >>= 8
}
return
}
// encodes the length in DER format
// If the length fits in 7 bits, the value is encoded directly.
//
// Otherwise, the number of bytes to encode the length is first determined.
// This number is likely to be 4 or less for a 32bit length. This number is
// added to 0x80. The length is encoded in big endian encoding follow after
//
// Examples:
// length | byte 1 | bytes n
// 0 | 0x00 | -
// 120 | 0x78 | -
// 200 | 0x81 | 0xC8
// 500 | 0x82 | 0x01 0xF4
//
func encodeLength(out *bytes.Buffer, length int) (err error) {
if length >= 128 {
l := lengthLength(length)
err = out.WriteByte(0x80 | byte(l))
if err != nil {
return
}
err = marshalLongLength(out, length)
if err != nil {
return
}
} else {
err = out.WriteByte(byte(length))
if err != nil {
return
}
}
return
}
func readObject(ber []byte, offset int) (asn1Object, int, error) {
berLen := len(ber)
if offset >= berLen {
return nil, 0, errors.New("ber2der: offset is after end of ber data")
}
tagStart := offset
b := ber[offset]
offset++
if offset >= berLen {
return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
}
tag := b & 0x1F // last 5 bits
if tag == 0x1F {
tag = 0
for ber[offset] >= 0x80 {
tag = tag*128 + ber[offset] - 0x80
offset++
if offset > berLen {
return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
}
}
// jvehent 20170227: this doesn't appear to be used anywhere...
//tag = tag*128 + ber[offset] - 0x80
offset++
if offset > berLen {
return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
}
}
tagEnd := offset
kind := b & 0x20
if kind == 0 {
debugprint("--> Primitive\n")
} else {
debugprint("--> Constructed\n")
}
// read length
var length int
l := ber[offset]
offset++
if offset > berLen {
return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
}
hack := 0
if l > 0x80 {
numberOfBytes := (int)(l & 0x7F)
if numberOfBytes > 4 { // int is only guaranteed to be 32bit
return nil, 0, errors.New("ber2der: BER tag length too long")
}
if numberOfBytes == 4 && (int)(ber[offset]) > 0x7F {
return nil, 0, errors.New("ber2der: BER tag length is negative")
}
if (int)(ber[offset]) == 0x0 {
return nil, 0, errors.New("ber2der: BER tag length has leading zero")
}
debugprint("--> (compute length) indicator byte: %x\n", l)
debugprint("--> (compute length) length bytes: % X\n", ber[offset:offset+numberOfBytes])
for i := 0; i < numberOfBytes; i++ {
length = length*256 + (int)(ber[offset])
offset++
if offset > berLen {
return nil, 0, errors.New("ber2der: cannot move offset forward, end of ber data reached")
}
}
} else if l == 0x80 {
// find length by searching content
markerIndex := bytes.LastIndex(ber[offset:], []byte{0x0, 0x0})
if markerIndex == -1 {
return nil, 0, errors.New("ber2der: Invalid BER format")
}
length = markerIndex
hack = 2
debugprint("--> (compute length) marker found at offset: %d\n", markerIndex+offset)
} else {
length = (int)(l)
}
if length < 0 {
return nil, 0, errors.New("ber2der: invalid negative value found in BER tag length")
}
//fmt.Printf("--> length : %d\n", length)
contentEnd := offset + length
if contentEnd > len(ber) {
return nil, 0, errors.New("ber2der: BER tag length is more than available data")
}
debugprint("--> content start : %d\n", offset)
debugprint("--> content end : %d\n", contentEnd)
debugprint("--> content : % X\n", ber[offset:contentEnd])
var obj asn1Object
if kind == 0 {
obj = asn1Primitive{
tagBytes: ber[tagStart:tagEnd],
length: length,
content: ber[offset:contentEnd],
}
} else {
var subObjects []asn1Object
for offset < contentEnd {
var subObj asn1Object
var err error
subObj, offset, err = readObject(ber[:contentEnd], offset)
if err != nil {
return nil, 0, err
}
subObjects = append(subObjects, subObj)
}
obj = asn1Structured{
tagBytes: ber[tagStart:tagEnd],
content: subObjects,
}
}
return obj, contentEnd + hack, nil
}
func debugprint(format string, a ...interface{}) {
//fmt.Printf(format, a)
}

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package pkcs7
import (
"bytes"
"encoding/asn1"
"strings"
"testing"
)
func TestBer2Der(t *testing.T) {
// indefinite length fixture
ber := []byte{0x30, 0x80, 0x02, 0x01, 0x01, 0x00, 0x00}
expected := []byte{0x30, 0x03, 0x02, 0x01, 0x01}
der, err := ber2der(ber)
if err != nil {
t.Fatalf("ber2der failed with error: %v", err)
}
if !bytes.Equal(der, expected) {
t.Errorf("ber2der result did not match.\n\tExpected: % X\n\tActual: % X", expected, der)
}
if der2, err := ber2der(der); err != nil {
t.Errorf("ber2der on DER bytes failed with error: %v", err)
} else {
if !bytes.Equal(der, der2) {
t.Error("ber2der is not idempotent")
}
}
var thing struct {
Number int
}
rest, err := asn1.Unmarshal(der, &thing)
if err != nil {
t.Errorf("Cannot parse resulting DER because: %v", err)
} else if len(rest) > 0 {
t.Errorf("Resulting DER has trailing data: % X", rest)
}
}
func TestBer2Der_Negatives(t *testing.T) {
fixtures := []struct {
Input []byte
ErrorContains string
}{
{[]byte{0x30, 0x85}, "tag length too long"},
{[]byte{0x30, 0x84, 0x80, 0x0, 0x0, 0x0}, "length is negative"},
{[]byte{0x30, 0x82, 0x0, 0x1}, "length has leading zero"},
{[]byte{0x30, 0x80, 0x1, 0x2}, "Invalid BER format"},
{[]byte{0x30, 0x03, 0x01, 0x02}, "length is more than available data"},
{[]byte{0x30}, "end of ber data reached"},
}
for _, fixture := range fixtures {
_, err := ber2der(fixture.Input)
if err == nil {
t.Errorf("No error thrown. Expected: %s", fixture.ErrorContains)
}
if !strings.Contains(err.Error(), fixture.ErrorContains) {
t.Errorf("Unexpected error thrown.\n\tExpected: /%s/\n\tActual: %s", fixture.ErrorContains, err.Error())
}
}
}

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package pkcs7
import (
"bytes"
"crypto"
"crypto/aes"
"crypto/cipher"
"crypto/des"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/asn1"
"errors"
"fmt"
)
// ErrUnsupportedAlgorithm tells you when our quick dev assumptions have failed
var ErrUnsupportedAlgorithm = errors.New("pkcs7: cannot decrypt data: only RSA, DES, DES-EDE3, AES-256-CBC and AES-128-GCM supported")
// ErrNotEncryptedContent is returned when attempting to Decrypt data that is not encrypted data
var ErrNotEncryptedContent = errors.New("pkcs7: content data is a decryptable data type")
// Decrypt decrypts encrypted content info for recipient cert and private key
func (p7 *PKCS7) Decrypt(cert *x509.Certificate, pkey crypto.PrivateKey) ([]byte, error) {
data, ok := p7.raw.(envelopedData)
if !ok {
return nil, ErrNotEncryptedContent
}
recipient := selectRecipientForCertificate(data.RecipientInfos, cert)
if recipient.EncryptedKey == nil {
return nil, errors.New("pkcs7: no enveloped recipient for provided certificate")
}
switch pkey := pkey.(type) {
case *rsa.PrivateKey:
var contentKey []byte
contentKey, err := rsa.DecryptPKCS1v15(rand.Reader, pkey, recipient.EncryptedKey)
if err != nil {
return nil, err
}
return data.EncryptedContentInfo.decrypt(contentKey)
}
return nil, ErrUnsupportedAlgorithm
}
// DecryptUsingPSK decrypts encrypted data using caller provided
// pre-shared secret
func (p7 *PKCS7) DecryptUsingPSK(key []byte) ([]byte, error) {
data, ok := p7.raw.(encryptedData)
if !ok {
return nil, ErrNotEncryptedContent
}
return data.EncryptedContentInfo.decrypt(key)
}
func (eci encryptedContentInfo) decrypt(key []byte) ([]byte, error) {
alg := eci.ContentEncryptionAlgorithm.Algorithm
if !alg.Equal(OIDEncryptionAlgorithmDESCBC) &&
!alg.Equal(OIDEncryptionAlgorithmDESEDE3CBC) &&
!alg.Equal(OIDEncryptionAlgorithmAES256CBC) &&
!alg.Equal(OIDEncryptionAlgorithmAES128CBC) &&
!alg.Equal(OIDEncryptionAlgorithmAES128GCM) &&
!alg.Equal(OIDEncryptionAlgorithmAES256GCM) {
fmt.Printf("Unsupported Content Encryption Algorithm: %s\n", alg)
return nil, ErrUnsupportedAlgorithm
}
// EncryptedContent can either be constructed of multple OCTET STRINGs
// or _be_ a tagged OCTET STRING
var cyphertext []byte
if eci.EncryptedContent.IsCompound {
// Complex case to concat all of the children OCTET STRINGs
var buf bytes.Buffer
cypherbytes := eci.EncryptedContent.Bytes
for {
var part []byte
cypherbytes, _ = asn1.Unmarshal(cypherbytes, &part)
buf.Write(part)
if cypherbytes == nil {
break
}
}
cyphertext = buf.Bytes()
} else {
// Simple case, the bytes _are_ the cyphertext
cyphertext = eci.EncryptedContent.Bytes
}
var block cipher.Block
var err error
switch {
case alg.Equal(OIDEncryptionAlgorithmDESCBC):
block, err = des.NewCipher(key)
case alg.Equal(OIDEncryptionAlgorithmDESEDE3CBC):
block, err = des.NewTripleDESCipher(key)
case alg.Equal(OIDEncryptionAlgorithmAES256CBC), alg.Equal(OIDEncryptionAlgorithmAES256GCM):
fallthrough
case alg.Equal(OIDEncryptionAlgorithmAES128GCM), alg.Equal(OIDEncryptionAlgorithmAES128CBC):
block, err = aes.NewCipher(key)
}
if err != nil {
return nil, err
}
if alg.Equal(OIDEncryptionAlgorithmAES128GCM) || alg.Equal(OIDEncryptionAlgorithmAES256GCM) {
params := aesGCMParameters{}
paramBytes := eci.ContentEncryptionAlgorithm.Parameters.Bytes
_, err := asn1.Unmarshal(paramBytes, &params)
if err != nil {
return nil, err
}
gcm, err := cipher.NewGCM(block)
if err != nil {
return nil, err
}
if len(params.Nonce) != gcm.NonceSize() {
return nil, errors.New("pkcs7: encryption algorithm parameters are incorrect")
}
if params.ICVLen != gcm.Overhead() {
return nil, errors.New("pkcs7: encryption algorithm parameters are incorrect")
}
plaintext, err := gcm.Open(nil, params.Nonce, cyphertext, nil)
if err != nil {
return nil, err
}
return plaintext, nil
}
iv := eci.ContentEncryptionAlgorithm.Parameters.Bytes
if len(iv) != block.BlockSize() {
return nil, errors.New("pkcs7: encryption algorithm parameters are malformed")
}
mode := cipher.NewCBCDecrypter(block, iv)
plaintext := make([]byte, len(cyphertext))
mode.CryptBlocks(plaintext, cyphertext)
if plaintext, err = unpad(plaintext, mode.BlockSize()); err != nil {
return nil, err
}
return plaintext, nil
}
func unpad(data []byte, blocklen int) ([]byte, error) {
if blocklen < 1 {
return nil, fmt.Errorf("invalid blocklen %d", blocklen)
}
if len(data)%blocklen != 0 || len(data) == 0 {
return nil, fmt.Errorf("invalid data len %d", len(data))
}
// the last byte is the length of padding
padlen := int(data[len(data)-1])
// check padding integrity, all bytes should be the same
pad := data[len(data)-padlen:]
for _, padbyte := range pad {
if padbyte != byte(padlen) {
return nil, errors.New("invalid padding")
}
}
return data[:len(data)-padlen], nil
}
func selectRecipientForCertificate(recipients []recipientInfo, cert *x509.Certificate) recipientInfo {
for _, recp := range recipients {
if isCertMatchForIssuerAndSerial(cert, recp.IssuerAndSerialNumber) {
return recp
}
}
return recipientInfo{}
}

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package pkcs7
import (
"bytes"
"testing"
)
func TestDecrypt(t *testing.T) {
fixture := UnmarshalTestFixture(EncryptedTestFixture)
p7, err := Parse(fixture.Input)
if err != nil {
t.Fatal(err)
}
content, err := p7.Decrypt(fixture.Certificate, fixture.PrivateKey)
if err != nil {
t.Errorf("Cannot Decrypt with error: %v", err)
}
expected := []byte("This is a test")
if !bytes.Equal(content, expected) {
t.Errorf("Decrypted result does not match.\n\tExpected:%s\n\tActual:%s", expected, content)
}
}
// Content is "This is a test"
var EncryptedTestFixture = `
-----BEGIN PKCS7-----
MIIBFwYJKoZIhvcNAQcDoIIBCDCCAQQCAQAxgcowgccCAQAwMjApMRAwDgYDVQQK
EwdBY21lIENvMRUwEwYDVQQDEwxFZGRhcmQgU3RhcmsCBQDL+CvWMAsGCSqGSIb3
DQEBAQSBgKyP/5WlRTZD3dWMrLOX6QRNDrXEkQjhmToRwFZdY3LgUh25ZU0S/q4G
dHPV21Fv9lQD+q7l3vfeHw8M6Z1PKi9sHMVfxAkQpvaI96DTIT3YHtuLC1w3geCO
8eFWTq2qS4WChSuS/yhYosjA1kTkE0eLnVZcGw0z/WVuEZznkdyIMDIGCSqGSIb3
DQEHATARBgUrDgMCBwQImpKsUyMPpQigEgQQRcWWrCRXqpD5Njs0GkJl+g==
-----END PKCS7-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`

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package pkcs7
import (
"bytes"
"crypto/aes"
"crypto/cipher"
"crypto/des"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/asn1"
"errors"
"fmt"
)
type envelopedData struct {
Version int
RecipientInfos []recipientInfo `asn1:"set"`
EncryptedContentInfo encryptedContentInfo
}
type encryptedData struct {
Version int
EncryptedContentInfo encryptedContentInfo
}
type recipientInfo struct {
Version int
IssuerAndSerialNumber issuerAndSerial
KeyEncryptionAlgorithm pkix.AlgorithmIdentifier
EncryptedKey []byte
}
type encryptedContentInfo struct {
ContentType asn1.ObjectIdentifier
ContentEncryptionAlgorithm pkix.AlgorithmIdentifier
EncryptedContent asn1.RawValue `asn1:"tag:0,optional,explicit"`
}
const (
// EncryptionAlgorithmDESCBC is the DES CBC encryption algorithm
EncryptionAlgorithmDESCBC = iota
// EncryptionAlgorithmAES128CBC is the AES 128 bits with CBC encryption algorithm
// Avoid this algorithm unless required for interoperability; use AES GCM instead.
EncryptionAlgorithmAES128CBC
// EncryptionAlgorithmAES256CBC is the AES 256 bits with CBC encryption algorithm
// Avoid this algorithm unless required for interoperability; use AES GCM instead.
EncryptionAlgorithmAES256CBC
// EncryptionAlgorithmAES128GCM is the AES 128 bits with GCM encryption algorithm
EncryptionAlgorithmAES128GCM
// EncryptionAlgorithmAES256GCM is the AES 256 bits with GCM encryption algorithm
EncryptionAlgorithmAES256GCM
)
// ContentEncryptionAlgorithm determines the algorithm used to encrypt the
// plaintext message. Change the value of this variable to change which
// algorithm is used in the Encrypt() function.
var ContentEncryptionAlgorithm = EncryptionAlgorithmDESCBC
// ErrUnsupportedEncryptionAlgorithm is returned when attempting to encrypt
// content with an unsupported algorithm.
var ErrUnsupportedEncryptionAlgorithm = errors.New("pkcs7: cannot encrypt content: only DES-CBC, AES-CBC, and AES-GCM supported")
// ErrPSKNotProvided is returned when attempting to encrypt
// using a PSK without actually providing the PSK.
var ErrPSKNotProvided = errors.New("pkcs7: cannot encrypt content: PSK not provided")
const nonceSize = 12
type aesGCMParameters struct {
Nonce []byte `asn1:"tag:4"`
ICVLen int
}
func encryptAESGCM(content []byte, key []byte) ([]byte, *encryptedContentInfo, error) {
var keyLen int
var algID asn1.ObjectIdentifier
switch ContentEncryptionAlgorithm {
case EncryptionAlgorithmAES128GCM:
keyLen = 16
algID = OIDEncryptionAlgorithmAES128GCM
case EncryptionAlgorithmAES256GCM:
keyLen = 32
algID = OIDEncryptionAlgorithmAES256GCM
default:
return nil, nil, fmt.Errorf("invalid ContentEncryptionAlgorithm in encryptAESGCM: %d", ContentEncryptionAlgorithm)
}
if key == nil {
// Create AES key
key = make([]byte, keyLen)
_, err := rand.Read(key)
if err != nil {
return nil, nil, err
}
}
// Create nonce
nonce := make([]byte, nonceSize)
_, err := rand.Read(nonce)
if err != nil {
return nil, nil, err
}
// Encrypt content
block, err := aes.NewCipher(key)
if err != nil {
return nil, nil, err
}
gcm, err := cipher.NewGCM(block)
if err != nil {
return nil, nil, err
}
ciphertext := gcm.Seal(nil, nonce, content, nil)
// Prepare ASN.1 Encrypted Content Info
paramSeq := aesGCMParameters{
Nonce: nonce,
ICVLen: gcm.Overhead(),
}
paramBytes, err := asn1.Marshal(paramSeq)
if err != nil {
return nil, nil, err
}
eci := encryptedContentInfo{
ContentType: OIDData,
ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
Algorithm: algID,
Parameters: asn1.RawValue{
Tag: asn1.TagSequence,
Bytes: paramBytes,
},
},
EncryptedContent: marshalEncryptedContent(ciphertext),
}
return key, &eci, nil
}
func encryptDESCBC(content []byte, key []byte) ([]byte, *encryptedContentInfo, error) {
if key == nil {
// Create DES key
key = make([]byte, 8)
_, err := rand.Read(key)
if err != nil {
return nil, nil, err
}
}
// Create CBC IV
iv := make([]byte, des.BlockSize)
_, err := rand.Read(iv)
if err != nil {
return nil, nil, err
}
// Encrypt padded content
block, err := des.NewCipher(key)
if err != nil {
return nil, nil, err
}
mode := cipher.NewCBCEncrypter(block, iv)
plaintext, err := pad(content, mode.BlockSize())
if err != nil {
return nil, nil, err
}
cyphertext := make([]byte, len(plaintext))
mode.CryptBlocks(cyphertext, plaintext)
// Prepare ASN.1 Encrypted Content Info
eci := encryptedContentInfo{
ContentType: OIDData,
ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
Algorithm: OIDEncryptionAlgorithmDESCBC,
Parameters: asn1.RawValue{Tag: 4, Bytes: iv},
},
EncryptedContent: marshalEncryptedContent(cyphertext),
}
return key, &eci, nil
}
func encryptAESCBC(content []byte, key []byte) ([]byte, *encryptedContentInfo, error) {
var keyLen int
var algID asn1.ObjectIdentifier
switch ContentEncryptionAlgorithm {
case EncryptionAlgorithmAES128CBC:
keyLen = 16
algID = OIDEncryptionAlgorithmAES128CBC
case EncryptionAlgorithmAES256CBC:
keyLen = 32
algID = OIDEncryptionAlgorithmAES256CBC
default:
return nil, nil, fmt.Errorf("invalid ContentEncryptionAlgorithm in encryptAESCBC: %d", ContentEncryptionAlgorithm)
}
if key == nil {
// Create AES key
key = make([]byte, keyLen)
_, err := rand.Read(key)
if err != nil {
return nil, nil, err
}
}
// Create CBC IV
iv := make([]byte, aes.BlockSize)
_, err := rand.Read(iv)
if err != nil {
return nil, nil, err
}
// Encrypt padded content
block, err := aes.NewCipher(key)
if err != nil {
return nil, nil, err
}
mode := cipher.NewCBCEncrypter(block, iv)
plaintext, err := pad(content, mode.BlockSize())
if err != nil {
return nil, nil, err
}
cyphertext := make([]byte, len(plaintext))
mode.CryptBlocks(cyphertext, plaintext)
// Prepare ASN.1 Encrypted Content Info
eci := encryptedContentInfo{
ContentType: OIDData,
ContentEncryptionAlgorithm: pkix.AlgorithmIdentifier{
Algorithm: algID,
Parameters: asn1.RawValue{Tag: 4, Bytes: iv},
},
EncryptedContent: marshalEncryptedContent(cyphertext),
}
return key, &eci, nil
}
// Encrypt creates and returns an envelope data PKCS7 structure with encrypted
// recipient keys for each recipient public key.
//
// The algorithm used to perform encryption is determined by the current value
// of the global ContentEncryptionAlgorithm package variable. By default, the
// value is EncryptionAlgorithmDESCBC. To use a different algorithm, change the
// value before calling Encrypt(). For example:
//
// ContentEncryptionAlgorithm = EncryptionAlgorithmAES128GCM
//
// TODO(fullsailor): Add support for encrypting content with other algorithms
func Encrypt(content []byte, recipients []*x509.Certificate) ([]byte, error) {
var eci *encryptedContentInfo
var key []byte
var err error
// Apply chosen symmetric encryption method
switch ContentEncryptionAlgorithm {
case EncryptionAlgorithmDESCBC:
key, eci, err = encryptDESCBC(content, nil)
case EncryptionAlgorithmAES128CBC:
fallthrough
case EncryptionAlgorithmAES256CBC:
key, eci, err = encryptAESCBC(content, nil)
case EncryptionAlgorithmAES128GCM:
fallthrough
case EncryptionAlgorithmAES256GCM:
key, eci, err = encryptAESGCM(content, nil)
default:
return nil, ErrUnsupportedEncryptionAlgorithm
}
if err != nil {
return nil, err
}
// Prepare each recipient's encrypted cipher key
recipientInfos := make([]recipientInfo, len(recipients))
for i, recipient := range recipients {
encrypted, err := encryptKey(key, recipient)
if err != nil {
return nil, err
}
ias, err := cert2issuerAndSerial(recipient)
if err != nil {
return nil, err
}
info := recipientInfo{
Version: 0,
IssuerAndSerialNumber: ias,
KeyEncryptionAlgorithm: pkix.AlgorithmIdentifier{
Algorithm: OIDEncryptionAlgorithmRSA,
},
EncryptedKey: encrypted,
}
recipientInfos[i] = info
}
// Prepare envelope content
envelope := envelopedData{
EncryptedContentInfo: *eci,
Version: 0,
RecipientInfos: recipientInfos,
}
innerContent, err := asn1.Marshal(envelope)
if err != nil {
return nil, err
}
// Prepare outer payload structure
wrapper := contentInfo{
ContentType: OIDEnvelopedData,
Content: asn1.RawValue{Class: 2, Tag: 0, IsCompound: true, Bytes: innerContent},
}
return asn1.Marshal(wrapper)
}
// EncryptUsingPSK creates and returns an encrypted data PKCS7 structure,
// encrypted using caller provided pre-shared secret.
func EncryptUsingPSK(content []byte, key []byte) ([]byte, error) {
var eci *encryptedContentInfo
var err error
if key == nil {
return nil, ErrPSKNotProvided
}
// Apply chosen symmetric encryption method
switch ContentEncryptionAlgorithm {
case EncryptionAlgorithmDESCBC:
_, eci, err = encryptDESCBC(content, key)
case EncryptionAlgorithmAES128GCM:
fallthrough
case EncryptionAlgorithmAES256GCM:
_, eci, err = encryptAESGCM(content, key)
default:
return nil, ErrUnsupportedEncryptionAlgorithm
}
if err != nil {
return nil, err
}
// Prepare encrypted-data content
ed := encryptedData{
Version: 0,
EncryptedContentInfo: *eci,
}
innerContent, err := asn1.Marshal(ed)
if err != nil {
return nil, err
}
// Prepare outer payload structure
wrapper := contentInfo{
ContentType: OIDEncryptedData,
Content: asn1.RawValue{Class: 2, Tag: 0, IsCompound: true, Bytes: innerContent},
}
return asn1.Marshal(wrapper)
}
func marshalEncryptedContent(content []byte) asn1.RawValue {
asn1Content, _ := asn1.Marshal(content)
return asn1.RawValue{Tag: 0, Class: 2, Bytes: asn1Content, IsCompound: true}
}
func encryptKey(key []byte, recipient *x509.Certificate) ([]byte, error) {
if pub := recipient.PublicKey.(*rsa.PublicKey); pub != nil {
return rsa.EncryptPKCS1v15(rand.Reader, pub, key)
}
return nil, ErrUnsupportedAlgorithm
}
func pad(data []byte, blocklen int) ([]byte, error) {
if blocklen < 1 {
return nil, fmt.Errorf("invalid blocklen %d", blocklen)
}
padlen := blocklen - (len(data) % blocklen)
if padlen == 0 {
padlen = blocklen
}
pad := bytes.Repeat([]byte{byte(padlen)}, padlen)
return append(data, pad...), nil
}

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package pkcs7
import (
"bytes"
"crypto/x509"
"testing"
)
func TestEncrypt(t *testing.T) {
modes := []int{
EncryptionAlgorithmDESCBC,
EncryptionAlgorithmAES128CBC,
EncryptionAlgorithmAES256CBC,
EncryptionAlgorithmAES128GCM,
EncryptionAlgorithmAES256GCM,
}
sigalgs := []x509.SignatureAlgorithm{
x509.SHA1WithRSA,
x509.SHA256WithRSA,
x509.SHA512WithRSA,
}
for _, mode := range modes {
for _, sigalg := range sigalgs {
ContentEncryptionAlgorithm = mode
plaintext := []byte("Hello Secret World!")
cert, err := createTestCertificate(sigalg)
if err != nil {
t.Fatal(err)
}
encrypted, err := Encrypt(plaintext, []*x509.Certificate{cert.Certificate})
if err != nil {
t.Fatal(err)
}
p7, err := Parse(encrypted)
if err != nil {
t.Fatalf("cannot Parse encrypted result: %s", err)
}
result, err := p7.Decrypt(cert.Certificate, *cert.PrivateKey)
if err != nil {
t.Fatalf("cannot Decrypt encrypted result: %s", err)
}
if !bytes.Equal(plaintext, result) {
t.Errorf("encrypted data does not match plaintext:\n\tExpected: %s\n\tActual: %s", plaintext, result)
}
}
}
}
func TestEncryptUsingPSK(t *testing.T) {
modes := []int{
EncryptionAlgorithmDESCBC,
EncryptionAlgorithmAES128GCM,
}
for _, mode := range modes {
ContentEncryptionAlgorithm = mode
plaintext := []byte("Hello Secret World!")
var key []byte
switch mode {
case EncryptionAlgorithmDESCBC:
key = []byte("64BitKey")
case EncryptionAlgorithmAES128GCM:
key = []byte("128BitKey4AESGCM")
}
ciphertext, err := EncryptUsingPSK(plaintext, key)
if err != nil {
t.Fatal(err)
}
p7, _ := Parse(ciphertext)
result, err := p7.DecryptUsingPSK(key)
if err != nil {
t.Fatalf("cannot Decrypt encrypted result: %s", err)
}
if !bytes.Equal(plaintext, result) {
t.Errorf("encrypted data does not match plaintext:\n\tExpected: %s\n\tActual: %s", plaintext, result)
}
}
}
func TestPad(t *testing.T) {
tests := []struct {
Original []byte
Expected []byte
BlockSize int
}{
{[]byte{0x1, 0x2, 0x3, 0x10}, []byte{0x1, 0x2, 0x3, 0x10, 0x4, 0x4, 0x4, 0x4}, 8},
{[]byte{0x1, 0x2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0}, []byte{0x1, 0x2, 0x3, 0x0, 0x0, 0x0, 0x0, 0x0, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8, 0x8}, 8},
}
for _, test := range tests {
padded, err := pad(test.Original, test.BlockSize)
if err != nil {
t.Errorf("pad encountered error: %s", err)
continue
}
if !bytes.Equal(test.Expected, padded) {
t.Errorf("pad results mismatch:\n\tExpected: %X\n\tActual: %X", test.Expected, padded)
}
}
}

291
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// Package pkcs7 implements parsing and generation of some PKCS#7 structures.
package pkcs7
import (
"bytes"
"crypto"
"crypto/dsa"
"crypto/ecdsa"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/asn1"
"errors"
"fmt"
"sort"
_ "crypto/sha1" // for crypto.SHA1
)
// PKCS7 Represents a PKCS7 structure
type PKCS7 struct {
Content []byte
Certificates []*x509.Certificate
CRLs []pkix.CertificateList
Signers []signerInfo
raw interface{}
}
type contentInfo struct {
ContentType asn1.ObjectIdentifier
Content asn1.RawValue `asn1:"explicit,optional,tag:0"`
}
// ErrUnsupportedContentType is returned when a PKCS7 content is not supported.
// Currently only Data (1.2.840.113549.1.7.1), Signed Data (1.2.840.113549.1.7.2),
// and Enveloped Data are supported (1.2.840.113549.1.7.3)
var ErrUnsupportedContentType = errors.New("pkcs7: cannot parse data: unimplemented content type")
type unsignedData []byte
var (
// Signed Data OIDs
OIDData = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 1}
OIDSignedData = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 2}
OIDEnvelopedData = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 3}
OIDEncryptedData = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 7, 6}
OIDAttributeContentType = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 3}
OIDAttributeMessageDigest = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 4}
OIDAttributeSigningTime = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 9, 5}
// Digest Algorithms
OIDDigestAlgorithmSHA1 = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 26}
OIDDigestAlgorithmSHA256 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 1}
OIDDigestAlgorithmSHA384 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 2}
OIDDigestAlgorithmSHA512 = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 2, 3}
OIDDigestAlgorithmDSA = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 1}
OIDDigestAlgorithmDSASHA1 = asn1.ObjectIdentifier{1, 2, 840, 10040, 4, 3}
OIDDigestAlgorithmECDSASHA1 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 1}
OIDDigestAlgorithmECDSASHA256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 2}
OIDDigestAlgorithmECDSASHA384 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 3}
OIDDigestAlgorithmECDSASHA512 = asn1.ObjectIdentifier{1, 2, 840, 10045, 4, 3, 4}
// Signature Algorithms
OIDEncryptionAlgorithmRSA = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 1}
OIDEncryptionAlgorithmRSASHA1 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 5}
OIDEncryptionAlgorithmRSASHA256 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 11}
OIDEncryptionAlgorithmRSASHA384 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 12}
OIDEncryptionAlgorithmRSASHA512 = asn1.ObjectIdentifier{1, 2, 840, 113549, 1, 1, 13}
OIDEncryptionAlgorithmECDSAP256 = asn1.ObjectIdentifier{1, 2, 840, 10045, 3, 1, 7}
OIDEncryptionAlgorithmECDSAP384 = asn1.ObjectIdentifier{1, 3, 132, 0, 34}
OIDEncryptionAlgorithmECDSAP521 = asn1.ObjectIdentifier{1, 3, 132, 0, 35}
// Encryption Algorithms
OIDEncryptionAlgorithmDESCBC = asn1.ObjectIdentifier{1, 3, 14, 3, 2, 7}
OIDEncryptionAlgorithmDESEDE3CBC = asn1.ObjectIdentifier{1, 2, 840, 113549, 3, 7}
OIDEncryptionAlgorithmAES256CBC = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 42}
OIDEncryptionAlgorithmAES128GCM = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 6}
OIDEncryptionAlgorithmAES128CBC = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 2}
OIDEncryptionAlgorithmAES256GCM = asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 1, 46}
)
func getHashForOID(oid asn1.ObjectIdentifier) (crypto.Hash, error) {
switch {
case oid.Equal(OIDDigestAlgorithmSHA1), oid.Equal(OIDDigestAlgorithmECDSASHA1),
oid.Equal(OIDDigestAlgorithmDSA), oid.Equal(OIDDigestAlgorithmDSASHA1),
oid.Equal(OIDEncryptionAlgorithmRSA):
return crypto.SHA1, nil
case oid.Equal(OIDDigestAlgorithmSHA256), oid.Equal(OIDDigestAlgorithmECDSASHA256):
return crypto.SHA256, nil
case oid.Equal(OIDDigestAlgorithmSHA384), oid.Equal(OIDDigestAlgorithmECDSASHA384):
return crypto.SHA384, nil
case oid.Equal(OIDDigestAlgorithmSHA512), oid.Equal(OIDDigestAlgorithmECDSASHA512):
return crypto.SHA512, nil
}
return crypto.Hash(0), ErrUnsupportedAlgorithm
}
// getDigestOIDForSignatureAlgorithm takes an x509.SignatureAlgorithm
// and returns the corresponding OID digest algorithm
func getDigestOIDForSignatureAlgorithm(digestAlg x509.SignatureAlgorithm) (asn1.ObjectIdentifier, error) {
switch digestAlg {
case x509.SHA1WithRSA, x509.ECDSAWithSHA1:
return OIDDigestAlgorithmSHA1, nil
case x509.SHA256WithRSA, x509.ECDSAWithSHA256:
return OIDDigestAlgorithmSHA256, nil
case x509.SHA384WithRSA, x509.ECDSAWithSHA384:
return OIDDigestAlgorithmSHA384, nil
case x509.SHA512WithRSA, x509.ECDSAWithSHA512:
return OIDDigestAlgorithmSHA512, nil
}
return nil, fmt.Errorf("pkcs7: cannot convert hash to oid, unknown hash algorithm")
}
// getOIDForEncryptionAlgorithm takes the private key type of the signer and
// the OID of a digest algorithm to return the appropriate signerInfo.DigestEncryptionAlgorithm
func getOIDForEncryptionAlgorithm(pkey crypto.PrivateKey, OIDDigestAlg asn1.ObjectIdentifier) (asn1.ObjectIdentifier, error) {
switch pkey.(type) {
case *rsa.PrivateKey:
switch {
default:
return OIDEncryptionAlgorithmRSA, nil
case OIDDigestAlg.Equal(OIDEncryptionAlgorithmRSA):
return OIDEncryptionAlgorithmRSA, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA1):
return OIDEncryptionAlgorithmRSASHA1, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA256):
return OIDEncryptionAlgorithmRSASHA256, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA384):
return OIDEncryptionAlgorithmRSASHA384, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA512):
return OIDEncryptionAlgorithmRSASHA512, nil
}
case *ecdsa.PrivateKey:
switch {
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA1):
return OIDDigestAlgorithmECDSASHA1, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA256):
return OIDDigestAlgorithmECDSASHA256, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA384):
return OIDDigestAlgorithmECDSASHA384, nil
case OIDDigestAlg.Equal(OIDDigestAlgorithmSHA512):
return OIDDigestAlgorithmECDSASHA512, nil
}
case *dsa.PrivateKey:
return OIDDigestAlgorithmDSA, nil
}
return nil, fmt.Errorf("pkcs7: cannot convert encryption algorithm to oid, unknown private key type %T", pkey)
}
// Parse decodes a DER encoded PKCS7 package
func Parse(data []byte) (p7 *PKCS7, err error) {
if len(data) == 0 {
return nil, errors.New("pkcs7: input data is empty")
}
var info contentInfo
der, err := ber2der(data)
if err != nil {
return nil, err
}
rest, err := asn1.Unmarshal(der, &info)
if len(rest) > 0 {
err = asn1.SyntaxError{Msg: "trailing data"}
return
}
if err != nil {
return
}
// fmt.Printf("--> Content Type: %s", info.ContentType)
switch {
case info.ContentType.Equal(OIDSignedData):
return parseSignedData(info.Content.Bytes)
case info.ContentType.Equal(OIDEnvelopedData):
return parseEnvelopedData(info.Content.Bytes)
case info.ContentType.Equal(OIDEncryptedData):
return parseEncryptedData(info.Content.Bytes)
}
return nil, ErrUnsupportedContentType
}
func parseEnvelopedData(data []byte) (*PKCS7, error) {
var ed envelopedData
if _, err := asn1.Unmarshal(data, &ed); err != nil {
return nil, err
}
return &PKCS7{
raw: ed,
}, nil
}
func parseEncryptedData(data []byte) (*PKCS7, error) {
var ed encryptedData
if _, err := asn1.Unmarshal(data, &ed); err != nil {
return nil, err
}
return &PKCS7{
raw: ed,
}, nil
}
func (raw rawCertificates) Parse() ([]*x509.Certificate, error) {
if len(raw.Raw) == 0 {
return nil, nil
}
var val asn1.RawValue
if _, err := asn1.Unmarshal(raw.Raw, &val); err != nil {
return nil, err
}
return x509.ParseCertificates(val.Bytes)
}
func isCertMatchForIssuerAndSerial(cert *x509.Certificate, ias issuerAndSerial) bool {
return cert.SerialNumber.Cmp(ias.SerialNumber) == 0 && bytes.Equal(cert.RawIssuer, ias.IssuerName.FullBytes)
}
// Attribute represents a key value pair attribute. Value must be marshalable byte
// `encoding/asn1`
type Attribute struct {
Type asn1.ObjectIdentifier
Value interface{}
}
type attributes struct {
types []asn1.ObjectIdentifier
values []interface{}
}
// Add adds the attribute, maintaining insertion order
func (attrs *attributes) Add(attrType asn1.ObjectIdentifier, value interface{}) {
attrs.types = append(attrs.types, attrType)
attrs.values = append(attrs.values, value)
}
type sortableAttribute struct {
SortKey []byte
Attribute attribute
}
type attributeSet []sortableAttribute
func (sa attributeSet) Len() int {
return len(sa)
}
func (sa attributeSet) Less(i, j int) bool {
return bytes.Compare(sa[i].SortKey, sa[j].SortKey) < 0
}
func (sa attributeSet) Swap(i, j int) {
sa[i], sa[j] = sa[j], sa[i]
}
func (sa attributeSet) Attributes() []attribute {
attrs := make([]attribute, len(sa))
for i, attr := range sa {
attrs[i] = attr.Attribute
}
return attrs
}
func (attrs *attributes) ForMarshalling() ([]attribute, error) {
sortables := make(attributeSet, len(attrs.types))
for i := range sortables {
attrType := attrs.types[i]
attrValue := attrs.values[i]
asn1Value, err := asn1.Marshal(attrValue)
if err != nil {
return nil, err
}
attr := attribute{
Type: attrType,
Value: asn1.RawValue{Tag: 17, IsCompound: true, Bytes: asn1Value}, // 17 == SET tag
}
encoded, err := asn1.Marshal(attr)
if err != nil {
return nil, err
}
sortables[i] = sortableAttribute{
SortKey: encoded,
Attribute: attr,
}
}
sort.Sort(sortables)
return sortables.Attributes(), nil
}

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scep/pkcs7/pkcs7_test.go Normal file
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package pkcs7
import (
"crypto"
"crypto/dsa"
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"fmt"
"log"
"math/big"
"os"
"time"
)
var test1024Key, test2048Key, test3072Key, test4096Key *rsa.PrivateKey
func init() {
test1024Key = &rsa.PrivateKey{
PublicKey: rsa.PublicKey{
N: fromBase10("123024078101403810516614073341068864574068590522569345017786163424062310013967742924377390210586226651760719671658568413826602264886073432535341149584680111145880576802262550990305759285883150470245429547886689754596541046564560506544976611114898883158121012232676781340602508151730773214407220733898059285561"),
E: 65537,
},
D: fromBase10("118892427340746627750435157989073921703209000249285930635312944544706203626114423392257295670807166199489096863209592887347935991101581502404113203993092422730000157893515953622392722273095289787303943046491132467130346663160540744582438810535626328230098940583296878135092036661410664695896115177534496784545"),
Primes: []*big.Int{
fromBase10("12172745919282672373981903347443034348576729562395784527365032103134165674508405592530417723266847908118361582847315228810176708212888860333051929276459099"),
fromBase10("10106518193772789699356660087736308350857919389391620140340519320928952625438936098550728858345355053201610649202713962702543058578827268756755006576249339"),
},
}
test1024Key.Precompute()
test2048Key = &rsa.PrivateKey{
PublicKey: rsa.PublicKey{
N: fromBase10("14314132931241006650998084889274020608918049032671858325988396851334124245188214251956198731333464217832226406088020736932173064754214329009979944037640912127943488972644697423190955557435910767690712778463524983667852819010259499695177313115447116110358524558307947613422897787329221478860907963827160223559690523660574329011927531289655711860504630573766609239332569210831325633840174683944553667352219670930408593321661375473885147973879086994006440025257225431977751512374815915392249179976902953721486040787792801849818254465486633791826766873076617116727073077821584676715609985777563958286637185868165868520557"),
E: 3,
},
D: fromBase10("9542755287494004433998723259516013739278699355114572217325597900889416163458809501304132487555642811888150937392013824621448709836142886006653296025093941418628992648429798282127303704957273845127141852309016655778568546006839666463451542076964744073572349705538631742281931858219480985907271975884773482372966847639853897890615456605598071088189838676728836833012254065983259638538107719766738032720239892094196108713378822882383694456030043492571063441943847195939549773271694647657549658603365629458610273821292232646334717612674519997533901052790334279661754176490593041941863932308687197618671528035670452762731"),
Primes: []*big.Int{
fromBase10("130903255182996722426771613606077755295583329135067340152947172868415809027537376306193179624298874215608270802054347609836776473930072411958753044562214537013874103802006369634761074377213995983876788718033850153719421695468704276694983032644416930879093914927146648402139231293035971427838068945045019075433"),
fromBase10("109348945610485453577574767652527472924289229538286649661240938988020367005475727988253438647560958573506159449538793540472829815903949343191091817779240101054552748665267574271163617694640513549693841337820602726596756351006149518830932261246698766355347898158548465400674856021497190430791824869615170301029"),
},
}
test2048Key.Precompute()
test3072Key = &rsa.PrivateKey{
PublicKey: rsa.PublicKey{
N: fromBase10("4799422180968749215324244710281712119910779465109490663934897082847293004098645365195947978124390029272750644394844443980065532911010718425428791498896288210928474905407341584968381379157418577471272697781778686372450913810019702928839200328075568223462554606149618941566459398862673532997592879359280754226882565483298027678735544377401276021471356093819491755877827249763065753555051973844057308627201762456191918852016986546071426986328720794061622370410645440235373576002278045257207695462423797272017386006110722769072206022723167102083033531426777518054025826800254337147514768377949097720074878744769255210076910190151785807232805749219196645305822228090875616900385866236956058984170647782567907618713309775105943700661530312800231153745705977436176908325539234432407050398510090070342851489496464612052853185583222422124535243967989533830816012180864309784486694786581956050902756173889941244024888811572094961378021"),
E: 65537,
},
D: fromBase10("4068124900056380177006532461065648259352178312499768312132802353620854992915205894105621345694615110794369150964768050224096623567443679436821868510233726084582567244003894477723706516831312989564775159596496449435830457803384416702014837685962523313266832032687145914871879794104404800823188153886925022171560391765913739346955738372354826804228989767120353182641396181570533678315099748218734875742705419933837638038793286534641711407564379950728858267828581787483317040753987167237461567332386718574803231955771633274184646232632371006762852623964054645811527580417392163873708539175349637050049959954373319861427407953413018816604365474462455009323937599275324390953644555294418021286807661559165324810415569396577697316798600308544755741549699523972971375304826663847015905713096287495342701286542193782001358775773848824496321550110946106870685499577993864871847542645561943034990484973293461948058147956373115641615329"),
Primes: []*big.Int{
fromBase10("2378529069722721185825622840841310902793949682948530343491428052737890236476884657507685118578733560141370511507721598189068683665232991988491561624429938984370132428230072355214627085652359350722926394699707232921674771664421591347888367477300909202851476404132163673865768760147403525700174918450753162242834161458300343282159799476695001920226357456953682236859505243928716782707623075239350380352265954107362618991716602898266999700316937680986690964564264877"),
fromBase10("2017811025336026464312837780072272578817919741496395062543647660689775637351085991504709917848745137013798005682591633910555599626950744674459976829106750083386168859581016361317479081273480343110649405858059581933773354781034946787147300862495438979895430001323443224335618577322449133208754541656374335100929456885995320929464029817626916719434010943205170760536768893924932021302887114400922813817969176636993508191950649313115712159241971065134077636674146073"),
},
}
test3072Key.Precompute()
test4096Key = &rsa.PrivateKey{
PublicKey: rsa.PublicKey{
N: fromBase10("633335480064287130853997429184971616419051348693342219741748040433588285601270210251206421401040394238592139790962887290698043839174341843721930134010306454716566698330215646704263665452264344664385995704186692432827662862845900348526672531755932642433662686500295989783595767573119607065791980381547677840410600100715146047382485989885183858757974681241303484641390718944520330953604501686666386926996348457928415093305041429178744778762826377713889019740060910363468343855830206640274442887621960581569183233822878661711798998132931623726434336448716605363514220760343097572198620479297583609779817750646169845195672483600293522186340560792255595411601450766002877850696008003794520089358819042318331840490155176019070646738739580486357084733208876620846449161909966690602374519398451042362690200166144326179405976024265116931974936425064291406950542193873313447617169603706868220189295654943247311295475722243471700112334609817776430552541319671117235957754556272646031356496763094955985615723596562217985372503002989591679252640940571608314743271809251568670314461039035793703429977801961867815257832671786542212589906513979094156334941265621017752516999186481477500481433634914622735206243841674973785078408289183000133399026553"),
E: 65537,
},
D: fromBase10("439373650557744155078930178606343279553665694488479749802070836418412881168612407941793966086633543867614175621952769177088930851151267623886678906158545451731745754402575409204816390946376103491325109185445659065122640946673660760274557781540431107937331701243915001777636528502669576801704352961341634812275635811512806966908648671988644114352046582195051714797831307925775689566757438907578527366568747104508496278929566712224252103563340770696548181508180254674236716995730292431858611476396845443056967589437890065663497768422598977743046882539288481002449571403783500529740184608873520856954837631427724158592309018382711485601884461168736465751756282510065053161144027097169985941910909130083273691945578478173708396726266170473745329617793866669307716920992380350270584929908460462802627239204245339385636926433446418108504614031393494119344916828744888432279343816084433424594432427362258172264834429525166677273382617457205387388293888430391895615438030066428745187333897518037597413369705720436392869403948934993623418405908467147848576977008003556716087129242155836114780890054057743164411952731290520995017097151300091841286806603044227906213832083363876549637037625314539090155417589796428888619937329669464810549362433"),
Primes: []*big.Int{
fromBase10("25745433817240673759910623230144796182285844101796353869339294232644316274580053211056707671663014355388701931204078502829809738396303142990312095225333440050808647355535878394534263839500592870406002873182360027755750148248672968563366185348499498613479490545488025779331426515670185366021612402246813511722553210128074701620113404560399242413747318161403908617342170447610792422053460359960010544593668037305465806912471260799852789913123044326555978680190904164976511331681163576833618899773550873682147782263100803907156362439021929408298804955194748640633152519828940133338948391986823456836070708197320166146761"),
fromBase10("24599914864909676687852658457515103765368967514652318497893275892114442089314173678877914038802355565271545910572804267918959612739009937926962653912943833939518967731764560204997062096919833970670512726396663920955497151415639902788974842698619579886297871162402643104696160155894685518587660015182381685605752989716946154299190561137541792784125356553411300817844325739404126956793095254412123887617931225840421856505925283322918693259047428656823141903489964287619982295891439430302405252447010728112098326033634688757933930065610737780413018498561434074501822951716586796047404555397992425143397497639322075233073"),
},
}
test4096Key.Precompute()
}
func fromBase10(base10 string) *big.Int {
i, ok := new(big.Int).SetString(base10, 10)
if !ok {
panic("bad number: " + base10)
}
return i
}
type certKeyPair struct {
Certificate *x509.Certificate
PrivateKey *crypto.PrivateKey
}
func createTestCertificate(sigAlg x509.SignatureAlgorithm) (certKeyPair, error) {
signer, err := createTestCertificateByIssuer("Eddard Stark", nil, sigAlg, true)
if err != nil {
return certKeyPair{}, err
}
pair, err := createTestCertificateByIssuer("Jon Snow", signer, sigAlg, false)
if err != nil {
return certKeyPair{}, err
}
return *pair, nil
}
func createTestCertificateByIssuer(name string, issuer *certKeyPair, sigAlg x509.SignatureAlgorithm, isCA bool) (*certKeyPair, error) {
var (
err error
priv crypto.PrivateKey
derCert []byte
issuerCert *x509.Certificate
issuerKey crypto.PrivateKey
)
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 32)
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
if err != nil {
return nil, err
}
template := x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
CommonName: name,
Organization: []string{"Acme Co"},
},
NotBefore: time.Now().Add(-1 *time.Second),
NotAfter: time.Now().AddDate(1, 0, 0),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageEmailProtection},
}
if issuer != nil {
issuerCert = issuer.Certificate
issuerKey = *issuer.PrivateKey
}
switch sigAlg {
case x509.SHA1WithRSA:
priv = test1024Key
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA1WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA1
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA1
}
case x509.SHA256WithRSA:
priv = test2048Key
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA256WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA256
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA256
}
case x509.SHA384WithRSA:
priv = test3072Key
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA384WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA384
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA256
}
case x509.SHA512WithRSA:
priv = test4096Key
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA512WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA512
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA256
}
case x509.ECDSAWithSHA1:
priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, err
}
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA1WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA1
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA1
}
case x509.ECDSAWithSHA256:
priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
if err != nil {
return nil, err
}
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA256WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA256
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA256
}
case x509.ECDSAWithSHA384:
priv, err = ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
if err != nil {
return nil, err
}
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA384WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA384
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA256
}
case x509.ECDSAWithSHA512:
priv, err = ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
if err != nil {
return nil, err
}
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA512WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA512
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA256
}
case x509.DSAWithSHA1:
var dsaPriv dsa.PrivateKey
params := &dsaPriv.Parameters
err = dsa.GenerateParameters(params, rand.Reader, dsa.L1024N160)
if err != nil {
return nil, err
}
err = dsa.GenerateKey(&dsaPriv, rand.Reader)
if err != nil {
return nil, err
}
switch issuerKey.(type) {
case *rsa.PrivateKey:
template.SignatureAlgorithm = x509.SHA1WithRSA
case *ecdsa.PrivateKey:
template.SignatureAlgorithm = x509.ECDSAWithSHA1
case *dsa.PrivateKey:
template.SignatureAlgorithm = x509.DSAWithSHA1
}
priv = &dsaPriv
}
if isCA {
template.IsCA = true
template.KeyUsage |= x509.KeyUsageCertSign
template.BasicConstraintsValid = true
}
if issuer == nil {
// no issuer given,make this a self-signed root cert
issuerCert = &template
issuerKey = priv
}
log.Println("creating cert", name, "issued by", issuerCert.Subject.CommonName, "with sigalg", sigAlg)
switch priv.(type) {
case *rsa.PrivateKey:
switch issuerKey.(type) {
case *rsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*rsa.PrivateKey).Public(), issuerKey.(*rsa.PrivateKey))
case *ecdsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*rsa.PrivateKey).Public(), issuerKey.(*ecdsa.PrivateKey))
case *dsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*rsa.PrivateKey).Public(), issuerKey.(*dsa.PrivateKey))
}
case *ecdsa.PrivateKey:
switch issuerKey.(type) {
case *rsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*ecdsa.PrivateKey).Public(), issuerKey.(*rsa.PrivateKey))
case *ecdsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*ecdsa.PrivateKey).Public(), issuerKey.(*ecdsa.PrivateKey))
case *dsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*ecdsa.PrivateKey).Public(), issuerKey.(*dsa.PrivateKey))
}
case *dsa.PrivateKey:
pub := &priv.(*dsa.PrivateKey).PublicKey
switch issuerKey := issuerKey.(type) {
case *rsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, pub, issuerKey)
case *ecdsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*dsa.PublicKey), issuerKey)
case *dsa.PrivateKey:
derCert, err = x509.CreateCertificate(rand.Reader, &template, issuerCert, priv.(*dsa.PublicKey), issuerKey)
}
}
if err != nil {
return nil, err
}
if len(derCert) == 0 {
return nil, fmt.Errorf("no certificate created, probably due to wrong keys. types were %T and %T", priv, issuerKey)
}
cert, err := x509.ParseCertificate(derCert)
if err != nil {
return nil, err
}
pem.Encode(os.Stdout, &pem.Block{Type: "CERTIFICATE", Bytes: cert.Raw})
return &certKeyPair{
Certificate: cert,
PrivateKey: &priv,
}, nil
}
type TestFixture struct {
Input []byte
Certificate *x509.Certificate
PrivateKey *rsa.PrivateKey
}
func UnmarshalTestFixture(testPEMBlock string) TestFixture {
var result TestFixture
var derBlock *pem.Block
var pemBlock = []byte(testPEMBlock)
for {
derBlock, pemBlock = pem.Decode(pemBlock)
if derBlock == nil {
break
}
switch derBlock.Type {
case "PKCS7":
result.Input = derBlock.Bytes
case "CERTIFICATE":
result.Certificate, _ = x509.ParseCertificate(derBlock.Bytes)
case "PRIVATE KEY":
result.PrivateKey, _ = x509.ParsePKCS1PrivateKey(derBlock.Bytes)
}
}
return result
}

429
scep/pkcs7/sign.go Normal file
View file

@ -0,0 +1,429 @@
package pkcs7
import (
"bytes"
"crypto"
"crypto/dsa"
"crypto/rand"
"crypto/x509"
"crypto/x509/pkix"
"encoding/asn1"
"errors"
"fmt"
"math/big"
"time"
)
// SignedData is an opaque data structure for creating signed data payloads
type SignedData struct {
sd signedData
certs []*x509.Certificate
data, messageDigest []byte
digestOid asn1.ObjectIdentifier
encryptionOid asn1.ObjectIdentifier
}
// NewSignedData takes data and initializes a PKCS7 SignedData struct that is
// ready to be signed via AddSigner. The digest algorithm is set to SHA1 by default
// and can be changed by calling SetDigestAlgorithm.
func NewSignedData(data []byte) (*SignedData, error) {
content, err := asn1.Marshal(data)
if err != nil {
return nil, err
}
ci := contentInfo{
ContentType: OIDData,
Content: asn1.RawValue{Class: 2, Tag: 0, Bytes: content, IsCompound: true},
}
sd := signedData{
ContentInfo: ci,
Version: 1,
}
return &SignedData{sd: sd, data: data, digestOid: OIDDigestAlgorithmSHA1}, nil
}
// SignerInfoConfig are optional values to include when adding a signer
type SignerInfoConfig struct {
ExtraSignedAttributes []Attribute
ExtraUnsignedAttributes []Attribute
}
type signedData struct {
Version int `asn1:"default:1"`
DigestAlgorithmIdentifiers []pkix.AlgorithmIdentifier `asn1:"set"`
ContentInfo contentInfo
Certificates rawCertificates `asn1:"optional,tag:0"`
CRLs []pkix.CertificateList `asn1:"optional,tag:1"`
SignerInfos []signerInfo `asn1:"set"`
}
type signerInfo struct {
Version int `asn1:"default:1"`
IssuerAndSerialNumber issuerAndSerial
DigestAlgorithm pkix.AlgorithmIdentifier
AuthenticatedAttributes []attribute `asn1:"optional,omitempty,tag:0"`
DigestEncryptionAlgorithm pkix.AlgorithmIdentifier
EncryptedDigest []byte
UnauthenticatedAttributes []attribute `asn1:"optional,omitempty,tag:1"`
}
type attribute struct {
Type asn1.ObjectIdentifier
Value asn1.RawValue `asn1:"set"`
}
func marshalAttributes(attrs []attribute) ([]byte, error) {
encodedAttributes, err := asn1.Marshal(struct {
A []attribute `asn1:"set"`
}{A: attrs})
if err != nil {
return nil, err
}
// Remove the leading sequence octets
var raw asn1.RawValue
asn1.Unmarshal(encodedAttributes, &raw)
return raw.Bytes, nil
}
type rawCertificates struct {
Raw asn1.RawContent
}
type issuerAndSerial struct {
IssuerName asn1.RawValue
SerialNumber *big.Int
}
// SetDigestAlgorithm sets the digest algorithm to be used in the signing process.
//
// This should be called before adding signers
func (sd *SignedData) SetDigestAlgorithm(d asn1.ObjectIdentifier) {
sd.digestOid = d
}
// SetEncryptionAlgorithm sets the encryption algorithm to be used in the signing process.
//
// This should be called before adding signers
func (sd *SignedData) SetEncryptionAlgorithm(d asn1.ObjectIdentifier) {
sd.encryptionOid = d
}
// AddSigner is a wrapper around AddSignerChain() that adds a signer without any parent.
func (sd *SignedData) AddSigner(ee *x509.Certificate, pkey crypto.PrivateKey, config SignerInfoConfig) error {
var parents []*x509.Certificate
return sd.AddSignerChain(ee, pkey, parents, config)
}
// AddSignerChain signs attributes about the content and adds certificates
// and signers infos to the Signed Data. The certificate and private key
// of the end-entity signer are used to issue the signature, and any
// parent of that end-entity that need to be added to the list of
// certifications can be specified in the parents slice.
//
// The signature algorithm used to hash the data is the one of the end-entity
// certificate.
func (sd *SignedData) AddSignerChain(ee *x509.Certificate, pkey crypto.PrivateKey, parents []*x509.Certificate, config SignerInfoConfig) error {
// Following RFC 2315, 9.2 SignerInfo type, the distinguished name of
// the issuer of the end-entity signer is stored in the issuerAndSerialNumber
// section of the SignedData.SignerInfo, alongside the serial number of
// the end-entity.
var ias issuerAndSerial
ias.SerialNumber = ee.SerialNumber
if len(parents) == 0 {
// no parent, the issuer is the end-entity cert itself
ias.IssuerName = asn1.RawValue{FullBytes: ee.RawIssuer}
} else {
err := verifyPartialChain(ee, parents)
if err != nil {
return err
}
// the first parent is the issuer
ias.IssuerName = asn1.RawValue{FullBytes: parents[0].RawSubject}
}
sd.sd.DigestAlgorithmIdentifiers = append(sd.sd.DigestAlgorithmIdentifiers,
pkix.AlgorithmIdentifier{Algorithm: sd.digestOid},
)
hash, err := getHashForOID(sd.digestOid)
if err != nil {
return err
}
h := hash.New()
h.Write(sd.data)
sd.messageDigest = h.Sum(nil)
encryptionOid, err := getOIDForEncryptionAlgorithm(pkey, sd.digestOid)
if err != nil {
return err
}
attrs := &attributes{}
attrs.Add(OIDAttributeContentType, sd.sd.ContentInfo.ContentType)
attrs.Add(OIDAttributeMessageDigest, sd.messageDigest)
attrs.Add(OIDAttributeSigningTime, time.Now().UTC())
for _, attr := range config.ExtraSignedAttributes {
attrs.Add(attr.Type, attr.Value)
}
finalAttrs, err := attrs.ForMarshalling()
if err != nil {
return err
}
unsignedAttrs := &attributes{}
for _, attr := range config.ExtraUnsignedAttributes {
unsignedAttrs.Add(attr.Type, attr.Value)
}
finalUnsignedAttrs, err := unsignedAttrs.ForMarshalling()
if err != nil {
return err
}
// create signature of signed attributes
signature, err := signAttributes(finalAttrs, pkey, hash)
if err != nil {
return err
}
signer := signerInfo{
AuthenticatedAttributes: finalAttrs,
UnauthenticatedAttributes: finalUnsignedAttrs,
DigestAlgorithm: pkix.AlgorithmIdentifier{Algorithm: sd.digestOid},
DigestEncryptionAlgorithm: pkix.AlgorithmIdentifier{Algorithm: encryptionOid},
IssuerAndSerialNumber: ias,
EncryptedDigest: signature,
Version: 1,
}
sd.certs = append(sd.certs, ee)
if len(parents) > 0 {
sd.certs = append(sd.certs, parents...)
}
sd.sd.SignerInfos = append(sd.sd.SignerInfos, signer)
return nil
}
// SignWithoutAttr issues a signature on the content of the pkcs7 SignedData.
// Unlike AddSigner/AddSignerChain, it calculates the digest on the data alone
// and does not include any signed attributes like timestamp and so on.
//
// This function is needed to sign old Android APKs, something you probably
// shouldn't do unless you're maintaining backward compatibility for old
// applications.
func (sd *SignedData) SignWithoutAttr(ee *x509.Certificate, pkey crypto.PrivateKey, config SignerInfoConfig) error {
var signature []byte
sd.sd.DigestAlgorithmIdentifiers = append(sd.sd.DigestAlgorithmIdentifiers, pkix.AlgorithmIdentifier{Algorithm: sd.digestOid})
hash, err := getHashForOID(sd.digestOid)
if err != nil {
return err
}
h := hash.New()
h.Write(sd.data)
sd.messageDigest = h.Sum(nil)
switch pkey := pkey.(type) {
case *dsa.PrivateKey:
// dsa doesn't implement crypto.Signer so we make a special case
// https://github.com/golang/go/issues/27889
r, s, err := dsa.Sign(rand.Reader, pkey, sd.messageDigest)
if err != nil {
return err
}
signature, err = asn1.Marshal(dsaSignature{r, s})
if err != nil {
return err
}
default:
key, ok := pkey.(crypto.Signer)
if !ok {
return errors.New("pkcs7: private key does not implement crypto.Signer")
}
signature, err = key.Sign(rand.Reader, sd.messageDigest, hash)
if err != nil {
return err
}
}
var ias issuerAndSerial
ias.SerialNumber = ee.SerialNumber
// no parent, the issue is the end-entity cert itself
ias.IssuerName = asn1.RawValue{FullBytes: ee.RawIssuer}
if sd.encryptionOid == nil {
// if the encryption algorithm wasn't set by SetEncryptionAlgorithm,
// infer it from the digest algorithm
sd.encryptionOid, err = getOIDForEncryptionAlgorithm(pkey, sd.digestOid)
}
if err != nil {
return err
}
signer := signerInfo{
DigestAlgorithm: pkix.AlgorithmIdentifier{Algorithm: sd.digestOid},
DigestEncryptionAlgorithm: pkix.AlgorithmIdentifier{Algorithm: sd.encryptionOid},
IssuerAndSerialNumber: ias,
EncryptedDigest: signature,
Version: 1,
}
// create signature of signed attributes
sd.certs = append(sd.certs, ee)
sd.sd.SignerInfos = append(sd.sd.SignerInfos, signer)
return nil
}
func (si *signerInfo) SetUnauthenticatedAttributes(extraUnsignedAttrs []Attribute) error {
unsignedAttrs := &attributes{}
for _, attr := range extraUnsignedAttrs {
unsignedAttrs.Add(attr.Type, attr.Value)
}
finalUnsignedAttrs, err := unsignedAttrs.ForMarshalling()
if err != nil {
return err
}
si.UnauthenticatedAttributes = finalUnsignedAttrs
return nil
}
// AddCertificate adds the certificate to the payload. Useful for parent certificates
func (sd *SignedData) AddCertificate(cert *x509.Certificate) {
sd.certs = append(sd.certs, cert)
}
// Detach removes content from the signed data struct to make it a detached signature.
// This must be called right before Finish()
func (sd *SignedData) Detach() {
sd.sd.ContentInfo = contentInfo{ContentType: OIDData}
}
// GetSignedData returns the private Signed Data
func (sd *SignedData) GetSignedData() *signedData {
return &sd.sd
}
// Finish marshals the content and its signers
func (sd *SignedData) Finish() ([]byte, error) {
sd.sd.Certificates = marshalCertificates(sd.certs)
inner, err := asn1.Marshal(sd.sd)
if err != nil {
return nil, err
}
outer := contentInfo{
ContentType: OIDSignedData,
Content: asn1.RawValue{Class: 2, Tag: 0, Bytes: inner, IsCompound: true},
}
return asn1.Marshal(outer)
}
// RemoveAuthenticatedAttributes removes authenticated attributes from signedData
// similar to OpenSSL's PKCS7_NOATTR or -noattr flags
func (sd *SignedData) RemoveAuthenticatedAttributes() {
for i := range sd.sd.SignerInfos {
sd.sd.SignerInfos[i].AuthenticatedAttributes = nil
}
}
// RemoveUnauthenticatedAttributes removes unauthenticated attributes from signedData
func (sd *SignedData) RemoveUnauthenticatedAttributes() {
for i := range sd.sd.SignerInfos {
sd.sd.SignerInfos[i].UnauthenticatedAttributes = nil
}
}
// verifyPartialChain checks that a given cert is issued by the first parent in the list,
// then continue down the path. It doesn't require the last parent to be a root CA,
// or to be trusted in any truststore. It simply verifies that the chain provided, albeit
// partial, makes sense.
func verifyPartialChain(cert *x509.Certificate, parents []*x509.Certificate) error {
if len(parents) == 0 {
return fmt.Errorf("pkcs7: zero parents provided to verify the signature of certificate %q", cert.Subject.CommonName)
}
err := cert.CheckSignatureFrom(parents[0])
if err != nil {
return fmt.Errorf("pkcs7: certificate signature from parent is invalid: %v", err)
}
if len(parents) == 1 {
// there is no more parent to check, return
return nil
}
return verifyPartialChain(parents[0], parents[1:])
}
func cert2issuerAndSerial(cert *x509.Certificate) (issuerAndSerial, error) {
var ias issuerAndSerial
// The issuer RDNSequence has to match exactly the sequence in the certificate
// We cannot use cert.Issuer.ToRDNSequence() here since it mangles the sequence
ias.IssuerName = asn1.RawValue{FullBytes: cert.RawIssuer}
ias.SerialNumber = cert.SerialNumber
return ias, nil
}
// signs the DER encoded form of the attributes with the private key
func signAttributes(attrs []attribute, pkey crypto.PrivateKey, digestAlg crypto.Hash) ([]byte, error) {
attrBytes, err := marshalAttributes(attrs)
if err != nil {
return nil, err
}
h := digestAlg.New()
h.Write(attrBytes)
hash := h.Sum(nil)
// dsa doesn't implement crypto.Signer so we make a special case
// https://github.com/golang/go/issues/27889
switch pkey := pkey.(type) {
case *dsa.PrivateKey:
r, s, err := dsa.Sign(rand.Reader, pkey, hash)
if err != nil {
return nil, err
}
return asn1.Marshal(dsaSignature{r, s})
}
key, ok := pkey.(crypto.Signer)
if !ok {
return nil, errors.New("pkcs7: private key does not implement crypto.Signer")
}
return key.Sign(rand.Reader, hash, digestAlg)
}
type dsaSignature struct {
R, S *big.Int
}
// concats and wraps the certificates in the RawValue structure
func marshalCertificates(certs []*x509.Certificate) rawCertificates {
var buf bytes.Buffer
for _, cert := range certs {
buf.Write(cert.Raw)
}
rawCerts, _ := marshalCertificateBytes(buf.Bytes())
return rawCerts
}
// Even though, the tag & length are stripped out during marshalling the
// RawContent, we have to encode it into the RawContent. If its missing,
// then `asn1.Marshal()` will strip out the certificate wrapper instead.
func marshalCertificateBytes(certs []byte) (rawCertificates, error) {
var val = asn1.RawValue{Bytes: certs, Class: 2, Tag: 0, IsCompound: true}
b, err := asn1.Marshal(val)
if err != nil {
return rawCertificates{}, err
}
return rawCertificates{Raw: b}, nil
}
// DegenerateCertificate creates a signed data structure containing only the
// provided certificate or certificate chain.
func DegenerateCertificate(cert []byte) ([]byte, error) {
rawCert, err := marshalCertificateBytes(cert)
if err != nil {
return nil, err
}
emptyContent := contentInfo{ContentType: OIDData}
sd := signedData{
Version: 1,
ContentInfo: emptyContent,
Certificates: rawCert,
CRLs: []pkix.CertificateList{},
}
content, err := asn1.Marshal(sd)
if err != nil {
return nil, err
}
signedContent := contentInfo{
ContentType: OIDSignedData,
Content: asn1.RawValue{Class: 2, Tag: 0, Bytes: content, IsCompound: true},
}
return asn1.Marshal(signedContent)
}

266
scep/pkcs7/sign_test.go Normal file
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package pkcs7
import (
"bytes"
"crypto/dsa"
"crypto/x509"
"encoding/asn1"
"encoding/pem"
"fmt"
"io/ioutil"
"log"
"math/big"
"os"
"os/exec"
"testing"
)
func TestSign(t *testing.T) {
content := []byte("Hello World")
sigalgs := []x509.SignatureAlgorithm{
x509.SHA1WithRSA,
x509.SHA256WithRSA,
x509.SHA512WithRSA,
x509.ECDSAWithSHA1,
x509.ECDSAWithSHA256,
x509.ECDSAWithSHA384,
x509.ECDSAWithSHA512,
}
for _, sigalgroot := range sigalgs {
rootCert, err := createTestCertificateByIssuer("PKCS7 Test Root CA", nil, sigalgroot, true)
if err != nil {
t.Fatalf("test %s: cannot generate root cert: %s", sigalgroot, err)
}
truststore := x509.NewCertPool()
truststore.AddCert(rootCert.Certificate)
for _, sigalginter := range sigalgs {
interCert, err := createTestCertificateByIssuer("PKCS7 Test Intermediate Cert", rootCert, sigalginter, true)
if err != nil {
t.Fatalf("test %s/%s: cannot generate intermediate cert: %s", sigalgroot, sigalginter, err)
}
var parents []*x509.Certificate
parents = append(parents, interCert.Certificate)
for _, sigalgsigner := range sigalgs {
signerCert, err := createTestCertificateByIssuer("PKCS7 Test Signer Cert", interCert, sigalgsigner, false)
if err != nil {
t.Fatalf("test %s/%s/%s: cannot generate signer cert: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
for _, testDetach := range []bool{false, true} {
log.Printf("test %s/%s/%s detached %t\n", sigalgroot, sigalginter, sigalgsigner, testDetach)
toBeSigned, err := NewSignedData(content)
if err != nil {
t.Fatalf("test %s/%s/%s: cannot initialize signed data: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
// Set the digest to match the end entity cert
signerDigest, _ := getDigestOIDForSignatureAlgorithm(signerCert.Certificate.SignatureAlgorithm)
toBeSigned.SetDigestAlgorithm(signerDigest)
if err := toBeSigned.AddSignerChain(signerCert.Certificate, *signerCert.PrivateKey, parents, SignerInfoConfig{}); err != nil {
t.Fatalf("test %s/%s/%s: cannot add signer: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
if testDetach {
toBeSigned.Detach()
}
signed, err := toBeSigned.Finish()
if err != nil {
t.Fatalf("test %s/%s/%s: cannot finish signing data: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
pem.Encode(os.Stdout, &pem.Block{Type: "PKCS7", Bytes: signed})
p7, err := Parse(signed)
if err != nil {
t.Fatalf("test %s/%s/%s: cannot parse signed data: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
if testDetach {
p7.Content = content
}
if !bytes.Equal(content, p7.Content) {
t.Errorf("test %s/%s/%s: content was not found in the parsed data:\n\tExpected: %s\n\tActual: %s", sigalgroot, sigalginter, sigalgsigner, content, p7.Content)
}
if err := p7.VerifyWithChain(truststore); err != nil {
t.Errorf("test %s/%s/%s: cannot verify signed data: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
if !signerDigest.Equal(p7.Signers[0].DigestAlgorithm.Algorithm) {
t.Errorf("test %s/%s/%s: expected digest algorithm %q but got %q",
sigalgroot, sigalginter, sigalgsigner, signerDigest, p7.Signers[0].DigestAlgorithm.Algorithm)
}
}
}
}
}
}
func TestDSASignAndVerifyWithOpenSSL(t *testing.T) {
content := []byte("Hello World")
// write the content to a temp file
tmpContentFile, err := ioutil.TempFile("", "TestDSASignAndVerifyWithOpenSSL_content")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpContentFile.Name(), content, 0755)
block, _ := pem.Decode([]byte(dsaPublicCert))
if block == nil {
t.Fatal("failed to parse certificate PEM")
}
signerCert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
t.Fatal("failed to parse certificate: " + err.Error())
}
// write the signer cert to a temp file
tmpSignerCertFile, err := ioutil.TempFile("", "TestDSASignAndVerifyWithOpenSSL_signer")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpSignerCertFile.Name(), dsaPublicCert, 0755)
priv := dsa.PrivateKey{
PublicKey: dsa.PublicKey{Parameters: dsa.Parameters{P: fromHex("fd7f53811d75122952df4a9c2eece4e7f611b7523cef4400c31e3f80b6512669455d402251fb593d8d58fabfc5f5ba30f6cb9b556cd7813b801d346ff26660b76b9950a5a49f9fe8047b1022c24fbba9d7feb7c61bf83b57e7c6a8a6150f04fb83f6d3c51ec3023554135a169132f675f3ae2b61d72aeff22203199dd14801c7"),
Q: fromHex("9760508F15230BCCB292B982A2EB840BF0581CF5"),
G: fromHex("F7E1A085D69B3DDECBBCAB5C36B857B97994AFBBFA3AEA82F9574C0B3D0782675159578EBAD4594FE67107108180B449167123E84C281613B7CF09328CC8A6E13C167A8B547C8D28E0A3AE1E2BB3A675916EA37F0BFA213562F1FB627A01243BCCA4F1BEA8519089A883DFE15AE59F06928B665E807B552564014C3BFECF492A"),
},
},
X: fromHex("7D6E1A3DD4019FD809669D8AB8DA73807CEF7EC1"),
}
toBeSigned, err := NewSignedData(content)
if err != nil {
t.Fatalf("test case: cannot initialize signed data: %s", err)
}
if err := toBeSigned.SignWithoutAttr(signerCert, &priv, SignerInfoConfig{}); err != nil {
t.Fatalf("Cannot add signer: %s", err)
}
toBeSigned.Detach()
signed, err := toBeSigned.Finish()
if err != nil {
t.Fatalf("test case: cannot finish signing data: %s", err)
}
// write the signature to a temp file
tmpSignatureFile, err := ioutil.TempFile("", "TestDSASignAndVerifyWithOpenSSL_signature")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpSignatureFile.Name(), pem.EncodeToMemory(&pem.Block{Type: "PKCS7", Bytes: signed}), 0755)
// call openssl to verify the signature on the content using the root
opensslCMD := exec.Command("openssl", "smime", "-verify", "-noverify",
"-in", tmpSignatureFile.Name(), "-inform", "PEM",
"-content", tmpContentFile.Name())
out, err := opensslCMD.CombinedOutput()
if err != nil {
t.Fatalf("test case: openssl command failed with %s: %s", err, out)
}
os.Remove(tmpSignatureFile.Name()) // clean up
os.Remove(tmpContentFile.Name()) // clean up
os.Remove(tmpSignerCertFile.Name()) // clean up
}
func ExampleSignedData() {
// generate a signing cert or load a key pair
cert, err := createTestCertificate(x509.SHA256WithRSA)
if err != nil {
fmt.Printf("Cannot create test certificates: %s", err)
}
// Initialize a SignedData struct with content to be signed
signedData, err := NewSignedData([]byte("Example data to be signed"))
if err != nil {
fmt.Printf("Cannot initialize signed data: %s", err)
}
// Add the signing cert and private key
if err := signedData.AddSigner(cert.Certificate, cert.PrivateKey, SignerInfoConfig{}); err != nil {
fmt.Printf("Cannot add signer: %s", err)
}
// Call Detach() is you want to remove content from the signature
// and generate an S/MIME detached signature
signedData.Detach()
// Finish() to obtain the signature bytes
detachedSignature, err := signedData.Finish()
if err != nil {
fmt.Printf("Cannot finish signing data: %s", err)
}
pem.Encode(os.Stdout, &pem.Block{Type: "PKCS7", Bytes: detachedSignature})
}
func TestUnmarshalSignedAttribute(t *testing.T) {
cert, err := createTestCertificate(x509.SHA512WithRSA)
if err != nil {
t.Fatal(err)
}
content := []byte("Hello World")
toBeSigned, err := NewSignedData(content)
if err != nil {
t.Fatalf("Cannot initialize signed data: %s", err)
}
oidTest := asn1.ObjectIdentifier{2, 3, 4, 5, 6, 7}
testValue := "TestValue"
if err := toBeSigned.AddSigner(cert.Certificate, *cert.PrivateKey, SignerInfoConfig{
ExtraSignedAttributes: []Attribute{Attribute{Type: oidTest, Value: testValue}},
}); err != nil {
t.Fatalf("Cannot add signer: %s", err)
}
signed, err := toBeSigned.Finish()
if err != nil {
t.Fatalf("Cannot finish signing data: %s", err)
}
p7, err := Parse(signed)
if err != nil {
t.Fatalf("Cannot parse signed data: %v", err)
}
var actual string
err = p7.UnmarshalSignedAttribute(oidTest, &actual)
if err != nil {
t.Fatalf("Cannot unmarshal test value: %s", err)
}
if testValue != actual {
t.Errorf("Attribute does not match test value\n\tExpected: %s\n\tActual: %s", testValue, actual)
}
}
func TestDegenerateCertificate(t *testing.T) {
cert, err := createTestCertificate(x509.SHA1WithRSA)
if err != nil {
t.Fatal(err)
}
deg, err := DegenerateCertificate(cert.Certificate.Raw)
if err != nil {
t.Fatal(err)
}
testOpenSSLParse(t, deg)
pem.Encode(os.Stdout, &pem.Block{Type: "PKCS7", Bytes: deg})
}
// writes the cert to a temporary file and tests that openssl can read it.
func testOpenSSLParse(t *testing.T, certBytes []byte) {
tmpCertFile, err := ioutil.TempFile("", "testCertificate")
if err != nil {
t.Fatal(err)
}
defer os.Remove(tmpCertFile.Name()) // clean up
if _, err := tmpCertFile.Write(certBytes); err != nil {
t.Fatal(err)
}
opensslCMD := exec.Command("openssl", "pkcs7", "-inform", "der", "-in", tmpCertFile.Name())
_, err = opensslCMD.Output()
if err != nil {
t.Fatal(err)
}
if err := tmpCertFile.Close(); err != nil {
t.Fatal(err)
}
}
func fromHex(s string) *big.Int {
result, ok := new(big.Int).SetString(s, 16)
if !ok {
panic(s)
}
return result
}

264
scep/pkcs7/verify.go Normal file
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package pkcs7
import (
"crypto/subtle"
"crypto/x509"
"crypto/x509/pkix"
"encoding/asn1"
"errors"
"fmt"
"time"
)
// Verify is a wrapper around VerifyWithChain() that initializes an empty
// trust store, effectively disabling certificate verification when validating
// a signature.
func (p7 *PKCS7) Verify() (err error) {
return p7.VerifyWithChain(nil)
}
// VerifyWithChain checks the signatures of a PKCS7 object.
// If truststore is not nil, it also verifies the chain of trust of the end-entity
// signer cert to one of the root in the truststore.
func (p7 *PKCS7) VerifyWithChain(truststore *x509.CertPool) (err error) {
if len(p7.Signers) == 0 {
return errors.New("pkcs7: Message has no signers")
}
for _, signer := range p7.Signers {
if err := verifySignature(p7, signer, truststore); err != nil {
return err
}
}
return nil
}
func verifySignature(p7 *PKCS7, signer signerInfo, truststore *x509.CertPool) (err error) {
signedData := p7.Content
ee := getCertFromCertsByIssuerAndSerial(p7.Certificates, signer.IssuerAndSerialNumber)
if ee == nil {
return errors.New("pkcs7: No certificate for signer")
}
signingTime := time.Now().UTC()
if len(signer.AuthenticatedAttributes) > 0 {
// TODO(fullsailor): First check the content type match
var digest []byte
err := unmarshalAttribute(signer.AuthenticatedAttributes, OIDAttributeMessageDigest, &digest)
if err != nil {
return err
}
hash, err := getHashForOID(signer.DigestAlgorithm.Algorithm)
if err != nil {
return err
}
h := hash.New()
h.Write(p7.Content)
computed := h.Sum(nil)
if subtle.ConstantTimeCompare(digest, computed) != 1 {
return &MessageDigestMismatchError{
ExpectedDigest: digest,
ActualDigest: computed,
}
}
signedData, err = marshalAttributes(signer.AuthenticatedAttributes)
if err != nil {
return err
}
err = unmarshalAttribute(signer.AuthenticatedAttributes, OIDAttributeSigningTime, &signingTime)
if err == nil {
// signing time found, performing validity check
if signingTime.After(ee.NotAfter) || signingTime.Before(ee.NotBefore) {
return fmt.Errorf("pkcs7: signing time %q is outside of certificate validity %q to %q",
signingTime.Format(time.RFC3339),
ee.NotBefore.Format(time.RFC3339),
ee.NotBefore.Format(time.RFC3339))
}
}
}
if truststore != nil {
_, err = verifyCertChain(ee, p7.Certificates, truststore, signingTime)
if err != nil {
return err
}
}
sigalg, err := getSignatureAlgorithm(signer.DigestEncryptionAlgorithm, signer.DigestAlgorithm)
if err != nil {
return err
}
return ee.CheckSignature(sigalg, signedData, signer.EncryptedDigest)
}
// GetOnlySigner returns an x509.Certificate for the first signer of the signed
// data payload. If there are more or less than one signer, nil is returned
func (p7 *PKCS7) GetOnlySigner() *x509.Certificate {
if len(p7.Signers) != 1 {
return nil
}
signer := p7.Signers[0]
return getCertFromCertsByIssuerAndSerial(p7.Certificates, signer.IssuerAndSerialNumber)
}
// UnmarshalSignedAttribute decodes a single attribute from the signer info
func (p7 *PKCS7) UnmarshalSignedAttribute(attributeType asn1.ObjectIdentifier, out interface{}) error {
sd, ok := p7.raw.(signedData)
if !ok {
return errors.New("pkcs7: payload is not signedData content")
}
if len(sd.SignerInfos) < 1 {
return errors.New("pkcs7: payload has no signers")
}
attributes := sd.SignerInfos[0].AuthenticatedAttributes
return unmarshalAttribute(attributes, attributeType, out)
}
func parseSignedData(data []byte) (*PKCS7, error) {
var sd signedData
asn1.Unmarshal(data, &sd)
certs, err := sd.Certificates.Parse()
if err != nil {
return nil, err
}
// fmt.Printf("--> Signed Data Version %d\n", sd.Version)
var compound asn1.RawValue
var content unsignedData
// The Content.Bytes maybe empty on PKI responses.
if len(sd.ContentInfo.Content.Bytes) > 0 {
if _, err := asn1.Unmarshal(sd.ContentInfo.Content.Bytes, &compound); err != nil {
return nil, err
}
}
// Compound octet string
if compound.IsCompound {
if compound.Tag == 4 {
if _, err = asn1.Unmarshal(compound.Bytes, &content); err != nil {
return nil, err
}
} else {
content = compound.Bytes
}
} else {
// assuming this is tag 04
content = compound.Bytes
}
return &PKCS7{
Content: content,
Certificates: certs,
CRLs: sd.CRLs,
Signers: sd.SignerInfos,
raw: sd}, nil
}
// verifyCertChain takes an end-entity certs, a list of potential intermediates and a
// truststore, and built all potential chains between the EE and a trusted root.
//
// When verifying chains that may have expired, currentTime can be set to a past date
// to allow the verification to pass. If unset, currentTime is set to the current UTC time.
func verifyCertChain(ee *x509.Certificate, certs []*x509.Certificate, truststore *x509.CertPool, currentTime time.Time) (chains [][]*x509.Certificate, err error) {
intermediates := x509.NewCertPool()
for _, intermediate := range certs {
intermediates.AddCert(intermediate)
}
verifyOptions := x509.VerifyOptions{
Roots: truststore,
Intermediates: intermediates,
KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageAny},
CurrentTime: currentTime,
}
chains, err = ee.Verify(verifyOptions)
if err != nil {
return chains, fmt.Errorf("pkcs7: failed to verify certificate chain: %v", err)
}
return
}
// MessageDigestMismatchError is returned when the signer data digest does not
// match the computed digest for the contained content
type MessageDigestMismatchError struct {
ExpectedDigest []byte
ActualDigest []byte
}
func (err *MessageDigestMismatchError) Error() string {
return fmt.Sprintf("pkcs7: Message digest mismatch\n\tExpected: %X\n\tActual : %X", err.ExpectedDigest, err.ActualDigest)
}
func getSignatureAlgorithm(digestEncryption, digest pkix.AlgorithmIdentifier) (x509.SignatureAlgorithm, error) {
switch {
case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA1):
return x509.ECDSAWithSHA1, nil
case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA256):
return x509.ECDSAWithSHA256, nil
case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA384):
return x509.ECDSAWithSHA384, nil
case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmECDSASHA512):
return x509.ECDSAWithSHA512, nil
case digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSA),
digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA1),
digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA256),
digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA384),
digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmRSASHA512):
switch {
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA1):
return x509.SHA1WithRSA, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA256):
return x509.SHA256WithRSA, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA384):
return x509.SHA384WithRSA, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA512):
return x509.SHA512WithRSA, nil
default:
return -1, fmt.Errorf("pkcs7: unsupported digest %q for encryption algorithm %q",
digest.Algorithm.String(), digestEncryption.Algorithm.String())
}
case digestEncryption.Algorithm.Equal(OIDDigestAlgorithmDSA),
digestEncryption.Algorithm.Equal(OIDDigestAlgorithmDSASHA1):
switch {
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA1):
return x509.DSAWithSHA1, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA256):
return x509.DSAWithSHA256, nil
default:
return -1, fmt.Errorf("pkcs7: unsupported digest %q for encryption algorithm %q",
digest.Algorithm.String(), digestEncryption.Algorithm.String())
}
case digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmECDSAP256),
digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmECDSAP384),
digestEncryption.Algorithm.Equal(OIDEncryptionAlgorithmECDSAP521):
switch {
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA1):
return x509.ECDSAWithSHA1, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA256):
return x509.ECDSAWithSHA256, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA384):
return x509.ECDSAWithSHA384, nil
case digest.Algorithm.Equal(OIDDigestAlgorithmSHA512):
return x509.ECDSAWithSHA512, nil
default:
return -1, fmt.Errorf("pkcs7: unsupported digest %q for encryption algorithm %q",
digest.Algorithm.String(), digestEncryption.Algorithm.String())
}
default:
return -1, fmt.Errorf("pkcs7: unsupported algorithm %q",
digestEncryption.Algorithm.String())
}
}
func getCertFromCertsByIssuerAndSerial(certs []*x509.Certificate, ias issuerAndSerial) *x509.Certificate {
for _, cert := range certs {
if isCertMatchForIssuerAndSerial(cert, ias) {
return cert
}
}
return nil
}
func unmarshalAttribute(attrs []attribute, attributeType asn1.ObjectIdentifier, out interface{}) error {
for _, attr := range attrs {
if attr.Type.Equal(attributeType) {
_, err := asn1.Unmarshal(attr.Value.Bytes, out)
return err
}
}
return errors.New("pkcs7: attribute type not in attributes")
}

713
scep/pkcs7/verify_test.go Normal file
View file

@ -0,0 +1,713 @@
package pkcs7
import (
"bytes"
"crypto/ecdsa"
"crypto/rsa"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"fmt"
"io/ioutil"
"os"
"os/exec"
"testing"
"time"
)
func TestVerify(t *testing.T) {
fixture := UnmarshalTestFixture(SignedTestFixture)
p7, err := Parse(fixture.Input)
if err != nil {
t.Errorf("Parse encountered unexpected error: %v", err)
}
if err := p7.Verify(); err != nil {
t.Errorf("Verify failed with error: %v", err)
}
expected := []byte("We the People")
if !bytes.Equal(p7.Content, expected) {
t.Errorf("Signed content does not match.\n\tExpected:%s\n\tActual:%s", expected, p7.Content)
}
}
var SignedTestFixture = `
-----BEGIN PKCS7-----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-----END PKCS7-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
-----BEGIN PRIVATE KEY-----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-----END PRIVATE KEY-----`
func TestVerifyEC2(t *testing.T) {
fixture := UnmarshalTestFixture(EC2IdentityDocumentFixture)
p7, err := Parse(fixture.Input)
if err != nil {
t.Errorf("Parse encountered unexpected error: %v", err)
}
p7.Certificates = []*x509.Certificate{fixture.Certificate}
if err := p7.Verify(); err != nil {
t.Errorf("Verify failed with error: %v", err)
}
}
var EC2IdentityDocumentFixture = `
-----BEGIN PKCS7-----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-----END PKCS7-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`
func TestVerifyAppStore(t *testing.T) {
fixture := UnmarshalTestFixture(AppStoreReceiptFixture)
p7, err := Parse(fixture.Input)
if err != nil {
t.Errorf("Parse encountered unexpected error: %v", err)
}
if err := p7.Verify(); err != nil {
t.Errorf("Verify failed with error: %v", err)
}
}
var AppStoreReceiptFixture = `
-----BEGIN PKCS7-----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dmVsb3BlciBSZWxhdGlvbnMgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkwggEiMA0G
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BAQDAgGGMBAGCiqGSIb3Y2QGAgEEAgUAMA0GCSqGSIb3DQEBBQUAA4IBAQBPz+9Z
viz1smwvj+4ThzLoBTWobot9yWkMudkXvHcs1Gfi/ZptOllc34MBvbKuKmFysa/N
w0Uwj6ODDc4dR7Txk4qjdJukw5hyhzs+r0ULklS5MruQGFNrCk4QttkdUGwhgAqJ
TleMa1s8Pab93vcNIx0LSiaHP7qRkkykGRIZbVf1eliHe2iK5IaMSuviSRSqpd1V
AKmuu0swruGgsbwpgOYJd+W+NKIByn/c4grmO7i77LpilfMFY0GCzQ87HUyVpNur
+cmV6U/kTecmmYHpvPm0KdIBembhLoz2IYrF+Hjhga6/05Cdqa3zr/04GpZnMBxR
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DQEBAQUAA4IBDwAwggEKAoIBAQDkkakJH5HbHkdQ6wXtXnmELes2oldMVeyLGYne
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djAOBgNVHQ8BAf8EBAMCAQYwDwYDVR0TAQH/BAUwAwEB/zAdBgNVHQ4EFgQUK9Bp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-----END PKCS7-----`
func TestVerifyApkEcdsa(t *testing.T) {
fixture := UnmarshalTestFixture(ApkEcdsaFixture)
p7, err := Parse(fixture.Input)
if err != nil {
t.Errorf("Parse encountered unexpected error: %v", err)
}
p7.Content, err = base64.StdEncoding.DecodeString(ApkEcdsaContent)
if err != nil {
t.Errorf("Failed to decode base64 signature file: %v", err)
}
if err := p7.Verify(); err != nil {
t.Errorf("Verify failed with error: %v", err)
}
}
var ApkEcdsaFixture = `-----BEGIN PKCS7-----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-----END PKCS7-----`
var ApkEcdsaContent = `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`
func TestVerifyFirefoxAddon(t *testing.T) {
fixture := UnmarshalTestFixture(FirefoxAddonFixture)
p7, err := Parse(fixture.Input)
if err != nil {
t.Errorf("Parse encountered unexpected error: %v", err)
}
p7.Content = FirefoxAddonContent
certPool := x509.NewCertPool()
certPool.AppendCertsFromPEM(FirefoxAddonRootCert)
if err := p7.VerifyWithChain(certPool); err != nil {
t.Errorf("Verify failed with error: %v", err)
}
// Verify the certificate chain to make sure the identified root
// is the one we expect
ee := getCertFromCertsByIssuerAndSerial(p7.Certificates, p7.Signers[0].IssuerAndSerialNumber)
if ee == nil {
t.Errorf("No end-entity certificate found for signer")
}
signingTime, _ := time.Parse(time.RFC3339, "2017-02-23 09:06:16-05:00")
chains, err := verifyCertChain(ee, p7.Certificates, certPool, signingTime)
if err != nil {
t.Error(err)
}
if len(chains) != 1 {
t.Errorf("Expected to find one chain, but found %d", len(chains))
}
if len(chains[0]) != 3 {
t.Errorf("Expected to find three certificates in chain, but found %d", len(chains[0]))
}
if chains[0][0].Subject.CommonName != "tabscope@xuldev.org" {
t.Errorf("Expected to find EE certificate with subject 'tabscope@xuldev.org', but found '%s'", chains[0][0].Subject.CommonName)
}
if chains[0][1].Subject.CommonName != "production-signing-ca.addons.mozilla.org" {
t.Errorf("Expected to find intermediate certificate with subject 'production-signing-ca.addons.mozilla.org', but found '%s'", chains[0][1].Subject.CommonName)
}
if chains[0][2].Subject.CommonName != "root-ca-production-amo" {
t.Errorf("Expected to find root certificate with subject 'root-ca-production-amo', but found '%s'", chains[0][2].Subject.CommonName)
}
}
var FirefoxAddonContent = []byte(`Signature-Version: 1.0
MD5-Digest-Manifest: KjRavc6/KNpuT1QLcB/Gsg==
SHA1-Digest-Manifest: 5Md5nUg+U7hQ/UfzV+xGKWOruVI=
`)
var FirefoxAddonFixture = `
-----BEGIN PKCS7-----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AgECAgMQAAIwDQYJKoZIhvcNAQEMBQAwfTELMAkGA1UEBhMCVVMxHDAaBgNVBAoT
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hxpzlCnxluzDZ51I/H7MvBbIvZBm9zSpHdffubSsak2qYE69d+ebTa/CK83WIosM
24/2Qp7n/GGaPJcCC4Y3JkrCsgA8+wV2MbFlKSv+qMdvI/sE3BPYDMCjVPMhHmIP
XaPWd42OoHpI8R3GGUtVnR3Hm76pa2+v6TwgeMiO8om+ogGufiyv6FNMZ5NuY1Z9
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3cApQL3+0kjaUX4scMjuNQDMKziRZkYgJAM+qA9WA5Jn77AjerQBWQeEev1PWHYh
0IDlgS/a0bjKmVjNZYG6adrY/R5/whzWGFCIE1UfhPm6PdN0557qvF838C2RFHsI
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CwhGmdbWDSBCicZNA7FKJpO3oIx26VPF2XUldA/T5Mh/POGLilK3t9m9qbjEyDp1
EwoBToOR/aMrdnNYvSWp0g/GHMzSfJjjXyAqrZY2itam/IJd8r9FoRAzevPt/zTX
BET3INoiCDGRH0XrxUYtAgMGVTejggE5MIIBNTAMBgNVHRMEBTADAQH/MA4GA1Ud
DwEB/wQEAwIBBjAWBgNVHSUBAf8EDDAKBggrBgEFBQcDAzAdBgNVHQ4EFgQUdHxf
FKXipZLjs20GqIUdNkQXH4gwgagGA1UdIwSBoDCBnYAUs7zqWHSr4W54KrKrnCMe
qGMsl7ehgYGkfzB9MQswCQYDVQQGEwJVUzEcMBoGA1UEChMTTW96aWxsYSBDb3Jw
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bTANBgkqhkiG9w0BAQwFAAOCAgEArde/fdjb7TE0eH7Ij7xU4JbcSyhY3cQhVYCw
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RK6uOKtS07HXLcXgFUBvJEQhbT/h5+IQOA4/GcpCshfD6iyiBBi+IocR+tnKPCuZ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-----END PKCS7-----`
var FirefoxAddonRootCert = []byte(`
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`)
// sign a document with openssl and verify the signature with pkcs7.
// this uses a chain of root, intermediate and signer cert, where the
// intermediate is added to the certs but the root isn't.
func TestSignWithOpenSSLAndVerify(t *testing.T) {
content := []byte(`
A ship in port is safe,
but that's not what ships are built for.
-- Grace Hopper`)
// write the content to a temp file
tmpContentFile, err := ioutil.TempFile("", "TestSignWithOpenSSLAndVerify_content")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpContentFile.Name(), content, 0755)
sigalgs := []x509.SignatureAlgorithm{
x509.SHA1WithRSA,
x509.SHA256WithRSA,
x509.SHA512WithRSA,
x509.ECDSAWithSHA1,
x509.ECDSAWithSHA256,
x509.ECDSAWithSHA384,
x509.ECDSAWithSHA512,
}
for _, sigalgroot := range sigalgs {
rootCert, err := createTestCertificateByIssuer("PKCS7 Test Root CA", nil, sigalgroot, true)
if err != nil {
t.Fatalf("test %s: cannot generate root cert: %s", sigalgroot, err)
}
truststore := x509.NewCertPool()
truststore.AddCert(rootCert.Certificate)
for _, sigalginter := range sigalgs {
interCert, err := createTestCertificateByIssuer("PKCS7 Test Intermediate Cert", rootCert, sigalginter, true)
if err != nil {
t.Fatalf("test %s/%s: cannot generate intermediate cert: %s", sigalgroot, sigalginter, err)
}
// write the intermediate cert to a temp file
tmpInterCertFile, err := ioutil.TempFile("", "TestSignWithOpenSSLAndVerify_intermediate")
if err != nil {
t.Fatal(err)
}
fd, err := os.OpenFile(tmpInterCertFile.Name(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0755)
if err != nil {
t.Fatal(err)
}
pem.Encode(fd, &pem.Block{Type: "CERTIFICATE", Bytes: interCert.Certificate.Raw})
fd.Close()
for _, sigalgsigner := range sigalgs {
signerCert, err := createTestCertificateByIssuer("PKCS7 Test Signer Cert", interCert, sigalgsigner, false)
if err != nil {
t.Fatalf("test %s/%s/%s: cannot generate signer cert: %s", sigalgroot, sigalginter, sigalgsigner, err)
}
// write the signer cert to a temp file
tmpSignerCertFile, err := ioutil.TempFile("", "TestSignWithOpenSSLAndVerify_signer")
if err != nil {
t.Fatal(err)
}
fd, err = os.OpenFile(tmpSignerCertFile.Name(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0755)
if err != nil {
t.Fatal(err)
}
pem.Encode(fd, &pem.Block{Type: "CERTIFICATE", Bytes: signerCert.Certificate.Raw})
fd.Close()
// write the signer key to a temp file
tmpSignerKeyFile, err := ioutil.TempFile("", "TestSignWithOpenSSLAndVerify_key")
if err != nil {
t.Fatal(err)
}
fd, err = os.OpenFile(tmpSignerKeyFile.Name(), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0755)
if err != nil {
t.Fatal(err)
}
var derKey []byte
priv := *signerCert.PrivateKey
switch priv := priv.(type) {
case *rsa.PrivateKey:
derKey = x509.MarshalPKCS1PrivateKey(priv)
pem.Encode(fd, &pem.Block{Type: "RSA PRIVATE KEY", Bytes: derKey})
case *ecdsa.PrivateKey:
derKey, err = x509.MarshalECPrivateKey(priv)
if err != nil {
t.Fatal(err)
}
pem.Encode(fd, &pem.Block{Type: "EC PRIVATE KEY", Bytes: derKey})
}
fd.Close()
// write the root cert to a temp file
tmpSignedFile, err := ioutil.TempFile("", "TestSignWithOpenSSLAndVerify_signature")
if err != nil {
t.Fatal(err)
}
// call openssl to sign the content
opensslCMD := exec.Command("openssl", "smime", "-sign", "-nodetach",
"-in", tmpContentFile.Name(), "-out", tmpSignedFile.Name(),
"-signer", tmpSignerCertFile.Name(), "-inkey", tmpSignerKeyFile.Name(),
"-certfile", tmpInterCertFile.Name(), "-outform", "PEM")
out, err := opensslCMD.CombinedOutput()
if err != nil {
t.Fatalf("test %s/%s/%s: openssl command failed with %s: %s", sigalgroot, sigalginter, sigalgsigner, err, out)
}
// verify the signed content
pemSignature, err := ioutil.ReadFile(tmpSignedFile.Name())
if err != nil {
t.Fatal(err)
}
derBlock, _ := pem.Decode(pemSignature)
if derBlock == nil {
break
}
p7, err := Parse(derBlock.Bytes)
if err != nil {
t.Fatalf("Parse encountered unexpected error: %v", err)
}
if err := p7.VerifyWithChain(truststore); err != nil {
t.Fatalf("Verify failed with error: %v", err)
}
// Verify the certificate chain to make sure the identified root
// is the one we expect
ee := getCertFromCertsByIssuerAndSerial(p7.Certificates, p7.Signers[0].IssuerAndSerialNumber)
if ee == nil {
t.Fatalf("No end-entity certificate found for signer")
}
chains, err := verifyCertChain(ee, p7.Certificates, truststore, time.Now())
if err != nil {
t.Fatal(err)
}
if len(chains) != 1 {
t.Fatalf("Expected to find one chain, but found %d", len(chains))
}
if len(chains[0]) != 3 {
t.Fatalf("Expected to find three certificates in chain, but found %d", len(chains[0]))
}
if chains[0][0].Subject.CommonName != "PKCS7 Test Signer Cert" {
t.Fatalf("Expected to find EE certificate with subject 'PKCS7 Test Signer Cert', but found '%s'", chains[0][0].Subject.CommonName)
}
if chains[0][1].Subject.CommonName != "PKCS7 Test Intermediate Cert" {
t.Fatalf("Expected to find intermediate certificate with subject 'PKCS7 Test Intermediate Cert', but found '%s'", chains[0][1].Subject.CommonName)
}
if chains[0][2].Subject.CommonName != "PKCS7 Test Root CA" {
t.Fatalf("Expected to find root certificate with subject 'PKCS7 Test Root CA', but found '%s'", chains[0][2].Subject.CommonName)
}
os.Remove(tmpSignerCertFile.Name()) // clean up
os.Remove(tmpSignerKeyFile.Name()) // clean up
}
os.Remove(tmpInterCertFile.Name()) // clean up
}
}
os.Remove(tmpContentFile.Name()) // clean up
}
func TestDSASignWithOpenSSLAndVerify(t *testing.T) {
content := []byte(`
A ship in port is safe,
but that's not what ships are built for.
-- Grace Hopper`)
// write the content to a temp file
tmpContentFile, err := ioutil.TempFile("", "TestDSASignWithOpenSSLAndVerify_content")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpContentFile.Name(), content, 0755)
// write the signer cert to a temp file
tmpSignerCertFile, err := ioutil.TempFile("", "TestDSASignWithOpenSSLAndVerify_signer")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpSignerCertFile.Name(), dsaPublicCert, 0755)
// write the signer key to a temp file
tmpSignerKeyFile, err := ioutil.TempFile("", "TestDSASignWithOpenSSLAndVerify_key")
if err != nil {
t.Fatal(err)
}
ioutil.WriteFile(tmpSignerKeyFile.Name(), dsaPrivateKey, 0755)
tmpSignedFile, err := ioutil.TempFile("", "TestDSASignWithOpenSSLAndVerify_signature")
if err != nil {
t.Fatal(err)
}
// call openssl to sign the content
opensslCMD := exec.Command("openssl", "smime", "-sign", "-nodetach", "-md", "sha1",
"-in", tmpContentFile.Name(), "-out", tmpSignedFile.Name(),
"-signer", tmpSignerCertFile.Name(), "-inkey", tmpSignerKeyFile.Name(),
"-certfile", tmpSignerCertFile.Name(), "-outform", "PEM")
out, err := opensslCMD.CombinedOutput()
if err != nil {
t.Fatalf("openssl command failed with %s: %s", err, out)
}
// verify the signed content
pemSignature, err := ioutil.ReadFile(tmpSignedFile.Name())
if err != nil {
t.Fatal(err)
}
fmt.Printf("%s\n", pemSignature)
derBlock, _ := pem.Decode(pemSignature)
if derBlock == nil {
t.Fatalf("failed to read DER block from signature PEM %s", tmpSignedFile.Name())
}
p7, err := Parse(derBlock.Bytes)
if err != nil {
t.Fatalf("Parse encountered unexpected error: %v", err)
}
if err := p7.Verify(); err != nil {
t.Fatalf("Verify failed with error: %v", err)
}
os.Remove(tmpSignerCertFile.Name()) // clean up
os.Remove(tmpSignerKeyFile.Name()) // clean up
os.Remove(tmpContentFile.Name()) // clean up
}
var dsaPrivateKey = []byte(`-----BEGIN PRIVATE KEY-----
MIIBSwIBADCCASwGByqGSM44BAEwggEfAoGBAP1/U4EddRIpUt9KnC7s5Of2EbdS
PO9EAMMeP4C2USZpRV1AIlH7WT2NWPq/xfW6MPbLm1Vs14E7gB00b/JmYLdrmVCl
pJ+f6AR7ECLCT7up1/63xhv4O1fnxqimFQ8E+4P208UewwI1VBNaFpEy9nXzrith
1yrv8iIDGZ3RSAHHAhUAl2BQjxUjC8yykrmCouuEC/BYHPUCgYEA9+GghdabPd7L
vKtcNrhXuXmUr7v6OuqC+VdMCz0HgmdRWVeOutRZT+ZxBxCBgLRJFnEj6EwoFhO3
zwkyjMim4TwWeotUfI0o4KOuHiuzpnWRbqN/C/ohNWLx+2J6ASQ7zKTxvqhRkImo
g9/hWuWfBpKLZl6Ae1UlZAFMO/7PSSoEFgIUfW4aPdQBn9gJZp2KuNpzgHzvfsE=
-----END PRIVATE KEY-----`)
var dsaPublicCert = []byte(`-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`)