| 12345678910111213141516171819 |
- scrypt encrypted data format
- ----------------------------
- offset length
- 0 6 "scrypt"
- 6 1 scrypt data file version number (== 0)
- 7 1 log2(N) (must be between 1 and 63 inclusive)
- 8 4 r (big-endian integer; must satisfy r * p < 2^30)
- 12 4 p (big-endian integer; must satisfy r * p < 2^30)
- 16 32 salt
- 48 16 first 16 bytes of SHA256(bytes 0 .. 47)
- 64 32 HMAC-SHA256(bytes 0 .. 63)
- 96 X data xor AES256-CTR key stream generated with nonce == 0
- 96+X 32 HMAC-SHA256(bytes 0 .. 96 + (X - 1))
- AES256-CTR is computed with a 256-bit AES key key_enc, and HMAC-SHA256 is
- computed with a 256-bit key key_hmac, where
- scrypt(password, salt, N, r, p, 64) == [key_enc][key_hmac]
|
