TrueCloudLab/certificates
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Return error on attestation validation

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The method storeError returns a nil error
This commit is contained in:
Mariano Cano 2022-08-29 20:03:34 -07:00
parent ab5f916bd3
commit ca412e77cc
1 changed files with 35 additions and 24 deletions
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59
acme/challenge.go
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@ -11,13 +11,11 @@ import (
"encoding/base64"
"encoding/hex"
"encoding/json"
"encoding/pem"
"errors"
"fmt"
"io"
"net"
"net/url"
"os"
"reflect"
"strconv"
"strings"
@ -344,7 +342,15 @@ func deviceAttest01Validate(ctx context.Context, ch *Challenge, db DB, jwk *jose
case "apple":
data, err := doAppleAttestationFormat(ctx, ch, db, &att)
if err != nil {
return err
var acmeError *Error
if errors.As(err, &acmeError) {
if acmeError.Status == 500 {
return acmeError
}
return storeError(ctx, db, ch, true, acmeError)
} else {
return WrapErrorISE(err, "error validating attestation")
}
}
// Validate nonce with SHA-256 of the token.
@ -365,7 +371,16 @@ func deviceAttest01Validate(ctx context.Context, ch *Challenge, db DB, jwk *jose
case "step":
data, err := doStepAttestationFormat(ctx, ch, db, &att)
if err != nil {
return err
var acmeError *Error
if errors.As(err, &acmeError) {
fmt.Println(acmeError)
if acmeError.Status == 500 {
return acmeError
}
return storeError(ctx, db, ch, true, acmeError)
} else {
return WrapErrorISE(err, "error validating attestation")
}
}
// Validate Apple's ClientIdentifier (Identifier.Value) with device
@ -432,30 +447,30 @@ func doAppleAttestationFormat(ctx context.Context, ch *Challenge, db DB, att *At
x5c, ok := att.AttStatement["x5c"].([]interface{})
if !ok {
return nil, storeError(ctx, db, ch, true, NewError(ErrorBadAttestationStatement, "x5c not present"))
return nil, NewError(ErrorBadAttestationStatement, "x5c not present")
}
if len(x5c) == 0 {
return nil, storeError(ctx, db, ch, true, NewError(ErrorRejectedIdentifierType, "x5c is empty"))
return nil, NewError(ErrorRejectedIdentifierType, "x5c is empty")
}
der, ok := x5c[0].([]byte)
if !ok {
return nil, storeError(ctx, db, ch, true, NewError(ErrorBadAttestationStatement, "x5c is malformed"))
return nil, NewError(ErrorBadAttestationStatement, "x5c is malformed")
}
leaf, err := x509.ParseCertificate(der)
if err != nil {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed"))
return nil, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed")
}
intermediates := x509.NewCertPool()
for _, v := range x5c[1:] {
der, ok = v.([]byte)
if !ok {
return nil, storeError(ctx, db, ch, true, NewError(ErrorBadAttestationStatement, "x5c is malformed"))
return nil, NewError(ErrorBadAttestationStatement, "x5c is malformed")
}
cert, err := x509.ParseCertificate(der)
if err != nil {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed"))
return nil, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed")
}
intermediates.AddCert(cert)
}
@ -466,7 +481,7 @@ func doAppleAttestationFormat(ctx context.Context, ch *Challenge, db DB, att *At
CurrentTime: time.Now().Truncate(time.Second),
KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageAny},
}); err != nil {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "x5c is not valid"))
return nil, WrapError(ErrorBadAttestationStatement, err, "x5c is not valid")
}
data := &appleAttestationData{
@ -522,41 +537,37 @@ type stepAttestationData struct {
func doStepAttestationFormat(ctx context.Context, ch *Challenge, db DB, att *AttestationObject) (*stepAttestationData, error) {
root, err := pemutil.ParseCertificate([]byte(yubicoPIVRootCA))
if err != nil {
return nil, WrapErrorISE(err, "error parsing apple enterprise ca")
return nil, WrapErrorISE(err, "error parsing root ca")
}
roots := x509.NewCertPool()
roots.AddCert(root)
x5c, ok := att.AttStatement["x5c"].([]interface{})
if !ok {
return nil, storeError(ctx, db, ch, true, NewError(ErrorBadAttestationStatement, "x5c not present"))
return nil, NewError(ErrorBadAttestationStatement, "x5c not present")
}
if len(x5c) == 0 {
return nil, storeError(ctx, db, ch, true, NewError(ErrorRejectedIdentifierType, "x5c is empty"))
return nil, NewError(ErrorRejectedIdentifierType, "x5c is empty")
}
der, ok := x5c[0].([]byte)
if !ok {
return nil, storeError(ctx, db, ch, true, NewError(ErrorBadAttestationStatement, "x5c is malformed"))
return nil, NewError(ErrorBadAttestationStatement, "x5c is malformed")
}
leaf, err := x509.ParseCertificate(der)
if err != nil {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed"))
return nil, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed")
}
pem.Encode(os.Stderr, &pem.Block{
Type: "CERTIFICATE", Bytes: leaf.Raw,
})
intermediates := x509.NewCertPool()
for _, v := range x5c[1:] {
der, ok = v.([]byte)
if !ok {
return nil, storeError(ctx, db, ch, true, NewError(ErrorBadAttestationStatement, "x5c is malformed"))
return nil, NewError(ErrorBadAttestationStatement, "x5c is malformed")
}
cert, err := x509.ParseCertificate(der)
if err != nil {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed"))
return nil, WrapError(ErrorBadAttestationStatement, err, "x5c is malformed")
}
intermediates.AddCert(cert)
}
@ -567,7 +578,7 @@ func doStepAttestationFormat(ctx context.Context, ch *Challenge, db DB, att *Att
CurrentTime: time.Now().Truncate(time.Second),
KeyUsages: []x509.ExtKeyUsage{x509.ExtKeyUsageAny},
}); err != nil {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "x5c is not valid"))
return nil, WrapError(ErrorBadAttestationStatement, err, "x5c is not valid")
}
data := &stepAttestationData{
@ -579,7 +590,7 @@ func doStepAttestationFormat(ctx context.Context, ch *Challenge, db DB, att *Att
var serialNumber int
rest, err := asn1.Unmarshal(ext.Value, &serialNumber)
if err != nil || len(rest) > 0 {
return nil, storeError(ctx, db, ch, true, WrapError(ErrorBadAttestationStatement, err, "error parsing serial number"))
return nil, WrapError(ErrorBadAttestationStatement, err, "error parsing serial number")
}
data.SerialNumber = strconv.Itoa(serialNumber)
}