Switch Fortuna with stream cipher. #1
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ignatk
reviewed
Nov 21, 2016
| g.cipher.Encrypt(r[i*16:], g.counter[:]) | ||
| g.increment() | ||
| } | ||
| type devNull struct{} |
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Name is cool, but in this context probably should be devZero
| } | ||
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| func passKey(password, realm string) []byte { | ||
| return pbkdf2.Key([]byte(password), []byte(realm), 4096, 32, sha256.New) | ||
| } | ||
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| func NewDRNG(password, realm string) io.Reader { | ||
| rng := &fortunaGenerator{} | ||
| rng.Reseed(passKey(password, realm)) | ||
| block, _ := aes.NewCipher(passKey(password, realm)) |
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It will error if passKey returns a slice which isn't 16 or 32 bytes long.
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| g.buffer.Write(blocks) | ||
| func (dn devNull) Read(p []byte) (n int, err error) { | ||
| for i := 0; i < len(p); i++ { |
ignatk
reviewed
Nov 21, 2016
| @@ -136,10 +53,10 @@ func NewDRNGwithSeed(password, realm string, seed []byte) (io.Reader, error) { | |||
| return nil, err | |||
| } | |||
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| rng := &fortunaGenerator{} | |||
| rng.Reseed(rngSeed) | |||
| block, _ := aes.NewCipher(passKey(password, realm)) | |||
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Sorry, missed this last time.
I guess here should be block, _ := aes.NewCipher(rngSeed), otherwise we are not using provided master seed.
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