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crypto: Rename exported funcs and structs, cleanup

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This commit is contained in:
Alexander Neumann 2015-04-12 10:53:46 +02:00
parent 21dc6dd3db
commit 64f7d4d611
4 changed files with 39 additions and 39 deletions
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44
crypto/crypto.go
View file

@ -42,17 +42,17 @@ var (
// structure. For the master key, the secret random polynomial used for content // structure. For the master key, the secret random polynomial used for content
// defined chunking is included. // defined chunking is included.
type Key struct { type Key struct {
Sign MACKey `json:"sign"` Sign SigningKey `json:"sign"`
Encrypt AESKey `json:"encrypt"` Encrypt EncryptionKey `json:"encrypt"`
ChunkerPolynomial chunker.Pol `json:"chunker_polynomial,omitempty"` ChunkerPolynomial chunker.Pol `json:"chunker_polynomial,omitempty"`
} }
type AESKey [32]byte type EncryptionKey [32]byte
type MACKey struct { type SigningKey struct {
K [16]byte // for AES128 K [16]byte `json:"k"` // for AES128
R [16]byte // for Poly1305 R [16]byte `json:"r"` // for Poly1305
} }
type IV [ivSize]byte type iv [ivSize]byte
// mask for key, (cf. http://cr.yp.to/mac/poly1305-20050329.pdf) // mask for key, (cf. http://cr.yp.to/mac/poly1305-20050329.pdf)
var poly1305KeyMask = [16]byte{ var poly1305KeyMask = [16]byte{
@ -75,7 +75,7 @@ var poly1305KeyMask = [16]byte{
} }
// key is a [32]byte, in the form k||r // key is a [32]byte, in the form k||r
func poly1305_sign(msg []byte, nonce []byte, key *MACKey) []byte { func poly1305_sign(msg []byte, nonce []byte, key *SigningKey) []byte {
// prepare key for low-level poly1305.Sum(): r||n // prepare key for low-level poly1305.Sum(): r||n
var k [32]byte var k [32]byte
@ -100,7 +100,7 @@ func poly1305_sign(msg []byte, nonce []byte, key *MACKey) []byte {
} }
// mask poly1305 key // mask poly1305 key
func maskKey(k *MACKey) { func maskKey(k *SigningKey) {
if k == nil { if k == nil {
return return
} }
@ -110,14 +110,14 @@ func maskKey(k *MACKey) {
} }
// construct mac key from slice (k||r), with masking // construct mac key from slice (k||r), with masking
func macKeyFromSlice(mk *MACKey, data []byte) { func macKeyFromSlice(mk *SigningKey, data []byte) {
copy(mk.K[:], data[:16]) copy(mk.K[:], data[:16])
copy(mk.R[:], data[16:32]) copy(mk.R[:], data[16:32])
maskKey(mk) maskKey(mk)
} }
// key: k||r // key: k||r
func poly1305_verify(msg []byte, nonce []byte, key *MACKey, mac []byte) bool { func poly1305_verify(msg []byte, nonce []byte, key *SigningKey, mac []byte) bool {
// prepare key for low-level poly1305.Sum(): r||n // prepare key for low-level poly1305.Sum(): r||n
var k [32]byte var k [32]byte
@ -141,8 +141,8 @@ func poly1305_verify(msg []byte, nonce []byte, key *MACKey, mac []byte) bool {
return poly1305.Verify(&m, msg, &k) return poly1305.Verify(&m, msg, &k)
} }
// GenerateKey returns new encryption and signing keys. // NewKey returns new encryption and signing keys.
func GenerateKey() (k *Key) { func NewKey() (k *Key) {
k = &Key{} k = &Key{}
n, err := rand.Read(k.Encrypt[:]) n, err := rand.Read(k.Encrypt[:])
if n != aesKeySize || err != nil { if n != aesKeySize || err != nil {
@ -164,7 +164,7 @@ func GenerateKey() (k *Key) {
return k return k
} }
func generateRandomIV() (iv IV) { func newIV() (iv iv) {
n, err := rand.Read(iv[:]) n, err := rand.Read(iv[:])
if n != ivSize || err != nil { if n != ivSize || err != nil {
panic("unable to read enough random bytes for iv") panic("unable to read enough random bytes for iv")
@ -177,11 +177,11 @@ type jsonMACKey struct {
R []byte `json:"r"` R []byte `json:"r"`
} }
func (m *MACKey) MarshalJSON() ([]byte, error) { func (m *SigningKey) MarshalJSON() ([]byte, error) {
return json.Marshal(jsonMACKey{K: m.K[:], R: m.R[:]}) return json.Marshal(jsonMACKey{K: m.K[:], R: m.R[:]})
} }
func (m *MACKey) UnmarshalJSON(data []byte) error { func (m *SigningKey) UnmarshalJSON(data []byte) error {
j := jsonMACKey{} j := jsonMACKey{}
err := json.Unmarshal(data, &j) err := json.Unmarshal(data, &j)
if err != nil { if err != nil {
@ -193,11 +193,11 @@ func (m *MACKey) UnmarshalJSON(data []byte) error {
return nil return nil
} }
func (k *AESKey) MarshalJSON() ([]byte, error) { func (k *EncryptionKey) MarshalJSON() ([]byte, error) {
return json.Marshal(k[:]) return json.Marshal(k[:])
} }
func (k *AESKey) UnmarshalJSON(data []byte) error { func (k *EncryptionKey) UnmarshalJSON(data []byte) error {
d := make([]byte, aesKeySize) d := make([]byte, aesKeySize)
err := json.Unmarshal(data, &d) err := json.Unmarshal(data, &d)
if err != nil { if err != nil {
@ -215,7 +215,7 @@ func Encrypt(ks *Key, ciphertext, plaintext []byte) (int, error) {
return 0, ErrBufferTooSmall return 0, ErrBufferTooSmall
} }
iv := generateRandomIV() iv := newIV()
copy(ciphertext, iv[:]) copy(ciphertext, iv[:])
c, err := aes.NewCipher(ks.Encrypt[:]) c, err := aes.NewCipher(ks.Encrypt[:])
@ -302,7 +302,7 @@ func KDF(N, R, P int, salt []byte, password string) (*Key, error) {
} }
type encryptWriter struct { type encryptWriter struct {
iv IV iv iv
wroteIV bool wroteIV bool
data *bytes.Buffer data *bytes.Buffer
key *Key key *Key
@ -378,7 +378,7 @@ func (e *encryptWriter) Write(p []byte) (int, error) {
// is called, the data is encrypted an written to the underlying writer. // is called, the data is encrypted an written to the underlying writer.
func EncryptTo(ks *Key, wr io.Writer) io.WriteCloser { func EncryptTo(ks *Key, wr io.Writer) io.WriteCloser {
ew := &encryptWriter{ ew := &encryptWriter{
iv: generateRandomIV(), iv: newIV(),
data: bytes.NewBuffer(getBuffer()[:0]), data: bytes.NewBuffer(getBuffer()[:0]),
key: ks, key: ks,
origWr: wr, origWr: wr,

10
crypto/crypto_int_test.go
View file

@ -45,7 +45,7 @@ var poly1305_tests = []struct {
func TestPoly1305(t *testing.T) { func TestPoly1305(t *testing.T) {
for _, test := range poly1305_tests { for _, test := range poly1305_tests {
key := &MACKey{} key := &SigningKey{}
copy(key.K[:], test.k) copy(key.K[:], test.k)
copy(key.R[:], test.r) copy(key.R[:], test.r)
mac := poly1305_sign(test.msg, test.nonce, key) mac := poly1305_sign(test.msg, test.nonce, key)
@ -61,16 +61,16 @@ func TestPoly1305(t *testing.T) {
} }
var test_values = []struct { var test_values = []struct {
ekey AESKey ekey EncryptionKey
skey MACKey skey SigningKey
ciphertext []byte ciphertext []byte
plaintext []byte plaintext []byte
should_panic bool should_panic bool
}{ }{
{ {
ekey: AESKey([...]byte{0x30, 0x3e, 0x86, 0x87, 0xb1, 0xd7, 0xdb, 0x18, 0x42, 0x1b, 0xdc, 0x6b, 0xb8, 0x58, 0x8c, 0xca, ekey: EncryptionKey([...]byte{0x30, 0x3e, 0x86, 0x87, 0xb1, 0xd7, 0xdb, 0x18, 0x42, 0x1b, 0xdc, 0x6b, 0xb8, 0x58, 0x8c, 0xca,
0xda, 0xc4, 0xd5, 0x9e, 0xe8, 0x7b, 0x8f, 0xf7, 0x0c, 0x44, 0xe6, 0x35, 0x79, 0x0c, 0xaf, 0xef}), 0xda, 0xc4, 0xd5, 0x9e, 0xe8, 0x7b, 0x8f, 0xf7, 0x0c, 0x44, 0xe6, 0x35, 0x79, 0x0c, 0xaf, 0xef}),
skey: MACKey{ skey: SigningKey{
K: [...]byte{0xef, 0x4d, 0x88, 0x24, 0xcb, 0x80, 0xb2, 0xbc, 0xc5, 0xfb, 0xff, 0x8a, 0x9b, 0x12, 0xa4, 0x2c}, K: [...]byte{0xef, 0x4d, 0x88, 0x24, 0xcb, 0x80, 0xb2, 0xbc, 0xc5, 0xfb, 0xff, 0x8a, 0x9b, 0x12, 0xa4, 0x2c},
R: [...]byte{0xcc, 0x8d, 0x4b, 0x94, 0x8e, 0xe0, 0xeb, 0xfe, 0x1d, 0x41, 0x5d, 0xe9, 0x21, 0xd1, 0x03, 0x53}, R: [...]byte{0xcc, 0x8d, 0x4b, 0x94, 0x8e, 0xe0, 0xeb, 0xfe, 0x1d, 0x41, 0x5d, 0xe9, 0x21, 0xd1, 0x03, 0x53},
}, },

22
crypto/crypto_test.go
View file

@ -17,7 +17,7 @@ import (
var testLargeCrypto = flag.Bool("test.largecrypto", false, "also test crypto functions with large payloads") var testLargeCrypto = flag.Bool("test.largecrypto", false, "also test crypto functions with large payloads")
func TestEncryptDecrypt(t *testing.T) { func TestEncryptDecrypt(t *testing.T) {
k := crypto.GenerateKey() k := crypto.NewKey()
tests := []int{5, 23, 2<<18 + 23, 1 << 20} tests := []int{5, 23, 2<<18 + 23, 1 << 20}
if *testLargeCrypto { if *testLargeCrypto {
@ -43,7 +43,7 @@ func TestEncryptDecrypt(t *testing.T) {
} }
func TestSmallBuffer(t *testing.T) { func TestSmallBuffer(t *testing.T) {
k := crypto.GenerateKey() k := crypto.NewKey()
size := 600 size := 600
data := make([]byte, size) data := make([]byte, size)
@ -65,7 +65,7 @@ func TestLargeEncrypt(t *testing.T) {
t.SkipNow() t.SkipNow()
} }
k := crypto.GenerateKey() k := crypto.NewKey()
for _, size := range []int{chunker.MaxSize, chunker.MaxSize + 1, chunker.MaxSize + 1<<20} { for _, size := range []int{chunker.MaxSize, chunker.MaxSize + 1, chunker.MaxSize + 1<<20} {
data := make([]byte, size) data := make([]byte, size)
@ -90,7 +90,7 @@ func BenchmarkEncryptWriter(b *testing.B) {
size := 8 << 20 // 8MiB size := 8 << 20 // 8MiB
rd := RandomReader(23, size) rd := RandomReader(23, size)
k := crypto.GenerateKey() k := crypto.NewKey()
b.ResetTimer() b.ResetTimer()
b.SetBytes(int64(size)) b.SetBytes(int64(size))
@ -108,7 +108,7 @@ func BenchmarkEncrypt(b *testing.B) {
size := 8 << 20 // 8MiB size := 8 << 20 // 8MiB
data := make([]byte, size) data := make([]byte, size)
k := crypto.GenerateKey() k := crypto.NewKey()
buf := make([]byte, len(data)+crypto.Extension) buf := make([]byte, len(data)+crypto.Extension)
b.ResetTimer() b.ResetTimer()
@ -123,7 +123,7 @@ func BenchmarkEncrypt(b *testing.B) {
func BenchmarkDecryptReader(b *testing.B) { func BenchmarkDecryptReader(b *testing.B) {
size := 8 << 20 // 8MiB size := 8 << 20 // 8MiB
buf := Random(23, size) buf := Random(23, size)
k := crypto.GenerateKey() k := crypto.NewKey()
ciphertext := make([]byte, len(buf)+crypto.Extension) ciphertext := make([]byte, len(buf)+crypto.Extension)
_, err := crypto.Encrypt(k, ciphertext, buf) _, err := crypto.Encrypt(k, ciphertext, buf)
@ -145,7 +145,7 @@ func BenchmarkDecryptReader(b *testing.B) {
} }
func BenchmarkEncryptDecryptReader(b *testing.B) { func BenchmarkEncryptDecryptReader(b *testing.B) {
k := crypto.GenerateKey() k := crypto.NewKey()
size := 8 << 20 // 8MiB size := 8 << 20 // 8MiB
rd := RandomReader(23, size) rd := RandomReader(23, size)
@ -176,7 +176,7 @@ func BenchmarkDecrypt(b *testing.B) {
size := 8 << 20 // 8MiB size := 8 << 20 // 8MiB
data := make([]byte, size) data := make([]byte, size)
k := crypto.GenerateKey() k := crypto.NewKey()
ciphertext := restic.GetChunkBuf("BenchmarkDecrypt") ciphertext := restic.GetChunkBuf("BenchmarkDecrypt")
defer restic.FreeChunkBuf("BenchmarkDecrypt", ciphertext) defer restic.FreeChunkBuf("BenchmarkDecrypt", ciphertext)
@ -196,7 +196,7 @@ func BenchmarkDecrypt(b *testing.B) {
} }
func TestEncryptStreamWriter(t *testing.T) { func TestEncryptStreamWriter(t *testing.T) {
k := crypto.GenerateKey() k := crypto.NewKey()
tests := []int{5, 23, 2<<18 + 23, 1 << 20} tests := []int{5, 23, 2<<18 + 23, 1 << 20}
if *testLargeCrypto { if *testLargeCrypto {
@ -230,7 +230,7 @@ func TestEncryptStreamWriter(t *testing.T) {
} }
func TestDecryptStreamReader(t *testing.T) { func TestDecryptStreamReader(t *testing.T) {
k := crypto.GenerateKey() k := crypto.NewKey()
tests := []int{5, 23, 2<<18 + 23, 1 << 20} tests := []int{5, 23, 2<<18 + 23, 1 << 20}
if *testLargeCrypto { if *testLargeCrypto {
@ -264,7 +264,7 @@ func TestDecryptStreamReader(t *testing.T) {
} }
func TestEncryptWriter(t *testing.T) { func TestEncryptWriter(t *testing.T) {
k := crypto.GenerateKey() k := crypto.NewKey()
tests := []int{5, 23, 2<<18 + 23, 1 << 20} tests := []int{5, 23, 2<<18 + 23, 1 << 20}
if *testLargeCrypto { if *testLargeCrypto {

2
key.go
View file

@ -176,7 +176,7 @@ func AddKey(s Server, password string, template *Key) (*Key, error) {
if template == nil { if template == nil {
// generate new random master keys // generate new random master keys
newkey.master = crypto.GenerateKey() newkey.master = crypto.NewKey()
// generate random polynomial for cdc // generate random polynomial for cdc
p, err := chunker.RandomPolynomial() p, err := chunker.RandomPolynomial()
if err != nil { if err != nil {