| 10 | return sha256(m) |
| 11 | |
| 12 | class sha256(object): |
| 13 | _k = (0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, |
| 14 | 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, |
| 15 | 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, |
| 16 | 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, |
| 17 | 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, |
| 18 | 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, |
| 19 | 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, |
| 20 | 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, |
| 21 | 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, |
| 22 | 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, |
| 23 | 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, |
| 24 | 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, |
| 25 | 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, |
| 26 | 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, |
| 27 | 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, |
| 28 | 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2) |
| 29 | _h = (0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, |
| 30 | 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19) |
| 31 | _output_size = 8 |
| 32 | |
| 33 | blocksize = 1 |
| 34 | block_size = 64 |
| 35 | digest_size = 32 |
| 36 | |
| 37 | def __init__(self, m=None): |
| 38 | self._buffer = '' |
| 39 | self._counter = 0 |
| 40 | |
| 41 | if m is not None: |
| 42 | if type(m) is not str: |
| 43 | raise TypeError('%s() argument 1 must be string, not %s' % (self.__class__.__name__, type(m).__name__)) |
| 44 | self.update(m) |
| 45 | |
| 46 | def _rotr(self, x, y): |
| 47 | return ((x >> y) | (x << (32-y))) & 0xFFFFFFFF |
| 48 | |
| 49 | def _sha256_process(self, c): |
| 50 | w = [0]*64 |
| 51 | w[0:15] = struct.unpack('!16L', c) |
| 52 | |
| 53 | for i in range(16, 64): |
| 54 | s0 = self._rotr(w[i-15], 7) ^ self._rotr(w[i-15], 18) ^ (w[i-15] >> 3) |
| 55 | s1 = self._rotr(w[i-2], 17) ^ self._rotr(w[i-2], 19) ^ (w[i-2] >> 10) |
| 56 | w[i] = (w[i-16] + s0 + w[i-7] + s1) & 0xFFFFFFFF |
| 57 | |
| 58 | a,b,c,d,e,f,g,h = self._h |
| 59 | |
| 60 | for i in range(64): |
| 61 | s0 = self._rotr(a, 2) ^ self._rotr(a, 13) ^ self._rotr(a, 22) |
| 62 | maj = (a & b) ^ (a & c) ^ (b & c) |
| 63 | t2 = s0 + maj |
| 64 | s1 = self._rotr(e, 6) ^ self._rotr(e, 11) ^ self._rotr(e, 25) |
| 65 | ch = (e & f) ^ ((~e) & g) |
| 66 | t1 = h + s1 + ch + self._k[i] + w[i] |
| 67 | |
| 68 | h = g |
| 69 | g = f |