зеркало из https://github.com/github/putty.git
456 строки
14 KiB
C
456 строки
14 KiB
C
/*
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* SHA-512 algorithm as described at
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*
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* http://csrc.nist.gov/cryptval/shs.html
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*
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* Modifications made for SHA-384 also
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*/
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#include "ssh.h"
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#define BLKSIZE 128
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/*
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* Arithmetic implementations. Note that AND, XOR and NOT can
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* overlap destination with one source, but the others can't.
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*/
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#define add(r,x,y) ( r.lo = y.lo + x.lo, \
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r.hi = y.hi + x.hi + ((uint32)r.lo < (uint32)y.lo) )
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#define rorB(r,x,y) ( r.lo = ((uint32)x.hi >> ((y)-32)) | ((uint32)x.lo << (64-(y))), \
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r.hi = ((uint32)x.lo >> ((y)-32)) | ((uint32)x.hi << (64-(y))) )
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#define rorL(r,x,y) ( r.lo = ((uint32)x.lo >> (y)) | ((uint32)x.hi << (32-(y))), \
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r.hi = ((uint32)x.hi >> (y)) | ((uint32)x.lo << (32-(y))) )
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#define shrB(r,x,y) ( r.lo = (uint32)x.hi >> ((y)-32), r.hi = 0 )
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#define shrL(r,x,y) ( r.lo = ((uint32)x.lo >> (y)) | ((uint32)x.hi << (32-(y))), \
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r.hi = (uint32)x.hi >> (y) )
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#define and(r,x,y) ( r.lo = x.lo & y.lo, r.hi = x.hi & y.hi )
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#define xor(r,x,y) ( r.lo = x.lo ^ y.lo, r.hi = x.hi ^ y.hi )
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#define not(r,x) ( r.lo = ~x.lo, r.hi = ~x.hi )
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#define INIT(h,l) { h, l }
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#define BUILD(r,h,l) ( r.hi = h, r.lo = l )
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#define EXTRACT(h,l,r) ( h = r.hi, l = r.lo )
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/* ----------------------------------------------------------------------
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* Core SHA512 algorithm: processes 16-doubleword blocks into a
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* message digest.
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*/
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#define Ch(r,t,x,y,z) ( not(t,x), and(r,t,z), and(t,x,y), xor(r,r,t) )
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#define Maj(r,t,x,y,z) ( and(r,x,y), and(t,x,z), xor(r,r,t), \
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and(t,y,z), xor(r,r,t) )
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#define bigsigma0(r,t,x) ( rorL(r,x,28), rorB(t,x,34), xor(r,r,t), \
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rorB(t,x,39), xor(r,r,t) )
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#define bigsigma1(r,t,x) ( rorL(r,x,14), rorL(t,x,18), xor(r,r,t), \
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rorB(t,x,41), xor(r,r,t) )
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#define smallsigma0(r,t,x) ( rorL(r,x,1), rorL(t,x,8), xor(r,r,t), \
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shrL(t,x,7), xor(r,r,t) )
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#define smallsigma1(r,t,x) ( rorL(r,x,19), rorB(t,x,61), xor(r,r,t), \
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shrL(t,x,6), xor(r,r,t) )
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static void SHA512_Core_Init(SHA512_State *s) {
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static const uint64 iv[] = {
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INIT(0x6a09e667, 0xf3bcc908),
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INIT(0xbb67ae85, 0x84caa73b),
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INIT(0x3c6ef372, 0xfe94f82b),
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INIT(0xa54ff53a, 0x5f1d36f1),
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INIT(0x510e527f, 0xade682d1),
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INIT(0x9b05688c, 0x2b3e6c1f),
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INIT(0x1f83d9ab, 0xfb41bd6b),
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INIT(0x5be0cd19, 0x137e2179),
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};
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int i;
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for (i = 0; i < 8; i++)
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s->h[i] = iv[i];
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}
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static void SHA384_Core_Init(SHA512_State *s) {
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static const uint64 iv[] = {
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INIT(0xcbbb9d5d, 0xc1059ed8),
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INIT(0x629a292a, 0x367cd507),
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INIT(0x9159015a, 0x3070dd17),
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INIT(0x152fecd8, 0xf70e5939),
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INIT(0x67332667, 0xffc00b31),
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INIT(0x8eb44a87, 0x68581511),
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INIT(0xdb0c2e0d, 0x64f98fa7),
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INIT(0x47b5481d, 0xbefa4fa4),
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};
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int i;
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for (i = 0; i < 8; i++)
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s->h[i] = iv[i];
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}
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static void SHA512_Block(SHA512_State *s, uint64 *block) {
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uint64 w[80];
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uint64 a,b,c,d,e,f,g,h;
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static const uint64 k[] = {
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INIT(0x428a2f98, 0xd728ae22), INIT(0x71374491, 0x23ef65cd),
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INIT(0xb5c0fbcf, 0xec4d3b2f), INIT(0xe9b5dba5, 0x8189dbbc),
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INIT(0x3956c25b, 0xf348b538), INIT(0x59f111f1, 0xb605d019),
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INIT(0x923f82a4, 0xaf194f9b), INIT(0xab1c5ed5, 0xda6d8118),
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INIT(0xd807aa98, 0xa3030242), INIT(0x12835b01, 0x45706fbe),
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INIT(0x243185be, 0x4ee4b28c), INIT(0x550c7dc3, 0xd5ffb4e2),
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INIT(0x72be5d74, 0xf27b896f), INIT(0x80deb1fe, 0x3b1696b1),
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INIT(0x9bdc06a7, 0x25c71235), INIT(0xc19bf174, 0xcf692694),
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INIT(0xe49b69c1, 0x9ef14ad2), INIT(0xefbe4786, 0x384f25e3),
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INIT(0x0fc19dc6, 0x8b8cd5b5), INIT(0x240ca1cc, 0x77ac9c65),
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INIT(0x2de92c6f, 0x592b0275), INIT(0x4a7484aa, 0x6ea6e483),
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INIT(0x5cb0a9dc, 0xbd41fbd4), INIT(0x76f988da, 0x831153b5),
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INIT(0x983e5152, 0xee66dfab), INIT(0xa831c66d, 0x2db43210),
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INIT(0xb00327c8, 0x98fb213f), INIT(0xbf597fc7, 0xbeef0ee4),
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INIT(0xc6e00bf3, 0x3da88fc2), INIT(0xd5a79147, 0x930aa725),
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INIT(0x06ca6351, 0xe003826f), INIT(0x14292967, 0x0a0e6e70),
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INIT(0x27b70a85, 0x46d22ffc), INIT(0x2e1b2138, 0x5c26c926),
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INIT(0x4d2c6dfc, 0x5ac42aed), INIT(0x53380d13, 0x9d95b3df),
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INIT(0x650a7354, 0x8baf63de), INIT(0x766a0abb, 0x3c77b2a8),
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INIT(0x81c2c92e, 0x47edaee6), INIT(0x92722c85, 0x1482353b),
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INIT(0xa2bfe8a1, 0x4cf10364), INIT(0xa81a664b, 0xbc423001),
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INIT(0xc24b8b70, 0xd0f89791), INIT(0xc76c51a3, 0x0654be30),
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INIT(0xd192e819, 0xd6ef5218), INIT(0xd6990624, 0x5565a910),
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INIT(0xf40e3585, 0x5771202a), INIT(0x106aa070, 0x32bbd1b8),
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INIT(0x19a4c116, 0xb8d2d0c8), INIT(0x1e376c08, 0x5141ab53),
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INIT(0x2748774c, 0xdf8eeb99), INIT(0x34b0bcb5, 0xe19b48a8),
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INIT(0x391c0cb3, 0xc5c95a63), INIT(0x4ed8aa4a, 0xe3418acb),
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INIT(0x5b9cca4f, 0x7763e373), INIT(0x682e6ff3, 0xd6b2b8a3),
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INIT(0x748f82ee, 0x5defb2fc), INIT(0x78a5636f, 0x43172f60),
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INIT(0x84c87814, 0xa1f0ab72), INIT(0x8cc70208, 0x1a6439ec),
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INIT(0x90befffa, 0x23631e28), INIT(0xa4506ceb, 0xde82bde9),
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INIT(0xbef9a3f7, 0xb2c67915), INIT(0xc67178f2, 0xe372532b),
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INIT(0xca273ece, 0xea26619c), INIT(0xd186b8c7, 0x21c0c207),
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INIT(0xeada7dd6, 0xcde0eb1e), INIT(0xf57d4f7f, 0xee6ed178),
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INIT(0x06f067aa, 0x72176fba), INIT(0x0a637dc5, 0xa2c898a6),
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INIT(0x113f9804, 0xbef90dae), INIT(0x1b710b35, 0x131c471b),
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INIT(0x28db77f5, 0x23047d84), INIT(0x32caab7b, 0x40c72493),
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INIT(0x3c9ebe0a, 0x15c9bebc), INIT(0x431d67c4, 0x9c100d4c),
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INIT(0x4cc5d4be, 0xcb3e42b6), INIT(0x597f299c, 0xfc657e2a),
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INIT(0x5fcb6fab, 0x3ad6faec), INIT(0x6c44198c, 0x4a475817),
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};
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int t;
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for (t = 0; t < 16; t++)
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w[t] = block[t];
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for (t = 16; t < 80; t++) {
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uint64 p, q, r, tmp;
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smallsigma1(p, tmp, w[t-2]);
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smallsigma0(q, tmp, w[t-15]);
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add(r, p, q);
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add(p, r, w[t-7]);
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add(w[t], p, w[t-16]);
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}
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a = s->h[0]; b = s->h[1]; c = s->h[2]; d = s->h[3];
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e = s->h[4]; f = s->h[5]; g = s->h[6]; h = s->h[7];
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for (t = 0; t < 80; t+=8) {
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uint64 tmp, p, q, r;
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#define ROUND(j,a,b,c,d,e,f,g,h) \
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bigsigma1(p, tmp, e); \
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Ch(q, tmp, e, f, g); \
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add(r, p, q); \
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add(p, r, k[j]) ; \
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add(q, p, w[j]); \
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add(r, q, h); \
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bigsigma0(p, tmp, a); \
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Maj(tmp, q, a, b, c); \
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add(q, tmp, p); \
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add(p, r, d); \
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d = p; \
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add(h, q, r);
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ROUND(t+0, a,b,c,d,e,f,g,h);
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ROUND(t+1, h,a,b,c,d,e,f,g);
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ROUND(t+2, g,h,a,b,c,d,e,f);
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ROUND(t+3, f,g,h,a,b,c,d,e);
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ROUND(t+4, e,f,g,h,a,b,c,d);
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ROUND(t+5, d,e,f,g,h,a,b,c);
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ROUND(t+6, c,d,e,f,g,h,a,b);
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ROUND(t+7, b,c,d,e,f,g,h,a);
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}
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{
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uint64 tmp;
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#define UPDATE(state, local) ( tmp = state, add(state, tmp, local) )
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UPDATE(s->h[0], a); UPDATE(s->h[1], b);
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UPDATE(s->h[2], c); UPDATE(s->h[3], d);
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UPDATE(s->h[4], e); UPDATE(s->h[5], f);
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UPDATE(s->h[6], g); UPDATE(s->h[7], h);
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}
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}
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/* ----------------------------------------------------------------------
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* Outer SHA512 algorithm: take an arbitrary length byte string,
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* convert it into 16-doubleword blocks with the prescribed padding
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* at the end, and pass those blocks to the core SHA512 algorithm.
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*/
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void SHA512_Init(SHA512_State *s) {
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int i;
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SHA512_Core_Init(s);
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s->blkused = 0;
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for (i = 0; i < 4; i++)
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s->len[i] = 0;
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}
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void SHA384_Init(SHA512_State *s) {
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int i;
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SHA384_Core_Init(s);
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s->blkused = 0;
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for (i = 0; i < 4; i++)
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s->len[i] = 0;
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}
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void SHA512_Bytes(SHA512_State *s, const void *p, int len) {
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unsigned char *q = (unsigned char *)p;
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uint64 wordblock[16];
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uint32 lenw = len;
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int i;
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/*
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* Update the length field.
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*/
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for (i = 0; i < 4; i++) {
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s->len[i] += lenw;
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lenw = (s->len[i] < lenw);
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}
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if (s->blkused && s->blkused+len < BLKSIZE) {
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/*
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* Trivial case: just add to the block.
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*/
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memcpy(s->block + s->blkused, q, len);
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s->blkused += len;
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} else {
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/*
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* We must complete and process at least one block.
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*/
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while (s->blkused + len >= BLKSIZE) {
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memcpy(s->block + s->blkused, q, BLKSIZE - s->blkused);
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q += BLKSIZE - s->blkused;
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len -= BLKSIZE - s->blkused;
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/* Now process the block. Gather bytes big-endian into words */
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for (i = 0; i < 16; i++) {
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uint32 h, l;
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h = ( ((uint32)s->block[i*8+0]) << 24 ) |
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( ((uint32)s->block[i*8+1]) << 16 ) |
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( ((uint32)s->block[i*8+2]) << 8 ) |
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( ((uint32)s->block[i*8+3]) << 0 );
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l = ( ((uint32)s->block[i*8+4]) << 24 ) |
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( ((uint32)s->block[i*8+5]) << 16 ) |
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( ((uint32)s->block[i*8+6]) << 8 ) |
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( ((uint32)s->block[i*8+7]) << 0 );
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BUILD(wordblock[i], h, l);
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}
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SHA512_Block(s, wordblock);
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s->blkused = 0;
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}
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memcpy(s->block, q, len);
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s->blkused = len;
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}
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}
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void SHA512_Final(SHA512_State *s, unsigned char *digest) {
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int i;
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int pad;
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unsigned char c[BLKSIZE];
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uint32 len[4];
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if (s->blkused >= BLKSIZE-16)
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pad = (BLKSIZE-16) + BLKSIZE - s->blkused;
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else
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pad = (BLKSIZE-16) - s->blkused;
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for (i = 4; i-- ;) {
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uint32 lenhi = s->len[i];
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uint32 lenlo = i > 0 ? s->len[i-1] : 0;
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len[i] = (lenhi << 3) | (lenlo >> (32-3));
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}
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memset(c, 0, pad);
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c[0] = 0x80;
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SHA512_Bytes(s, &c, pad);
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for (i = 0; i < 4; i++) {
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c[i*4+0] = (len[3-i] >> 24) & 0xFF;
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c[i*4+1] = (len[3-i] >> 16) & 0xFF;
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c[i*4+2] = (len[3-i] >> 8) & 0xFF;
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c[i*4+3] = (len[3-i] >> 0) & 0xFF;
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}
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SHA512_Bytes(s, &c, 16);
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for (i = 0; i < 8; i++) {
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uint32 h, l;
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EXTRACT(h, l, s->h[i]);
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digest[i*8+0] = (h >> 24) & 0xFF;
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digest[i*8+1] = (h >> 16) & 0xFF;
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digest[i*8+2] = (h >> 8) & 0xFF;
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digest[i*8+3] = (h >> 0) & 0xFF;
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digest[i*8+4] = (l >> 24) & 0xFF;
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digest[i*8+5] = (l >> 16) & 0xFF;
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digest[i*8+6] = (l >> 8) & 0xFF;
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digest[i*8+7] = (l >> 0) & 0xFF;
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}
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}
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void SHA384_Final(SHA512_State *s, unsigned char *digest) {
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unsigned char biggerDigest[512 / 8];
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SHA512_Final(s, biggerDigest);
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memcpy(digest, biggerDigest, 384 / 8);
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}
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void SHA512_Simple(const void *p, int len, unsigned char *output) {
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SHA512_State s;
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SHA512_Init(&s);
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SHA512_Bytes(&s, p, len);
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SHA512_Final(&s, output);
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smemclr(&s, sizeof(s));
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}
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void SHA384_Simple(const void *p, int len, unsigned char *output) {
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SHA512_State s;
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SHA384_Init(&s);
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SHA512_Bytes(&s, p, len);
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SHA384_Final(&s, output);
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smemclr(&s, sizeof(s));
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}
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/*
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* Thin abstraction for things where hashes are pluggable.
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*/
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static void *sha512_init(void)
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{
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SHA512_State *s;
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s = snew(SHA512_State);
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SHA512_Init(s);
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return s;
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}
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static void sha512_bytes(void *handle, void *p, int len)
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{
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SHA512_State *s = handle;
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SHA512_Bytes(s, p, len);
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}
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static void sha512_final(void *handle, unsigned char *output)
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{
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SHA512_State *s = handle;
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SHA512_Final(s, output);
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smemclr(s, sizeof(*s));
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sfree(s);
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}
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const struct ssh_hash ssh_sha512 = {
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sha512_init, sha512_bytes, sha512_final, 64, "SHA-512"
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};
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static void *sha384_init(void)
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{
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SHA512_State *s;
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s = snew(SHA512_State);
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SHA384_Init(s);
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return s;
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}
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static void sha384_final(void *handle, unsigned char *output)
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{
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SHA512_State *s = handle;
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SHA384_Final(s, output);
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smemclr(s, sizeof(*s));
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sfree(s);
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}
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const struct ssh_hash ssh_sha384 = {
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sha384_init, sha512_bytes, sha384_final, 48, "SHA-384"
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};
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#ifdef TEST
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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int main(void) {
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unsigned char digest[64];
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int i, j, errors;
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struct {
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const char *teststring;
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unsigned char digest512[64];
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} tests[] = {
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{ "abc", {
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0xdd, 0xaf, 0x35, 0xa1, 0x93, 0x61, 0x7a, 0xba,
|
|
0xcc, 0x41, 0x73, 0x49, 0xae, 0x20, 0x41, 0x31,
|
|
0x12, 0xe6, 0xfa, 0x4e, 0x89, 0xa9, 0x7e, 0xa2,
|
|
0x0a, 0x9e, 0xee, 0xe6, 0x4b, 0x55, 0xd3, 0x9a,
|
|
0x21, 0x92, 0x99, 0x2a, 0x27, 0x4f, 0xc1, 0xa8,
|
|
0x36, 0xba, 0x3c, 0x23, 0xa3, 0xfe, 0xeb, 0xbd,
|
|
0x45, 0x4d, 0x44, 0x23, 0x64, 0x3c, 0xe8, 0x0e,
|
|
0x2a, 0x9a, 0xc9, 0x4f, 0xa5, 0x4c, 0xa4, 0x9f,
|
|
} },
|
|
{ "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmn"
|
|
"hijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu", {
|
|
0x8e, 0x95, 0x9b, 0x75, 0xda, 0xe3, 0x13, 0xda,
|
|
0x8c, 0xf4, 0xf7, 0x28, 0x14, 0xfc, 0x14, 0x3f,
|
|
0x8f, 0x77, 0x79, 0xc6, 0xeb, 0x9f, 0x7f, 0xa1,
|
|
0x72, 0x99, 0xae, 0xad, 0xb6, 0x88, 0x90, 0x18,
|
|
0x50, 0x1d, 0x28, 0x9e, 0x49, 0x00, 0xf7, 0xe4,
|
|
0x33, 0x1b, 0x99, 0xde, 0xc4, 0xb5, 0x43, 0x3a,
|
|
0xc7, 0xd3, 0x29, 0xee, 0xb6, 0xdd, 0x26, 0x54,
|
|
0x5e, 0x96, 0xe5, 0x5b, 0x87, 0x4b, 0xe9, 0x09,
|
|
} },
|
|
{ NULL, {
|
|
0xe7, 0x18, 0x48, 0x3d, 0x0c, 0xe7, 0x69, 0x64,
|
|
0x4e, 0x2e, 0x42, 0xc7, 0xbc, 0x15, 0xb4, 0x63,
|
|
0x8e, 0x1f, 0x98, 0xb1, 0x3b, 0x20, 0x44, 0x28,
|
|
0x56, 0x32, 0xa8, 0x03, 0xaf, 0xa9, 0x73, 0xeb,
|
|
0xde, 0x0f, 0xf2, 0x44, 0x87, 0x7e, 0xa6, 0x0a,
|
|
0x4c, 0xb0, 0x43, 0x2c, 0xe5, 0x77, 0xc3, 0x1b,
|
|
0xeb, 0x00, 0x9c, 0x5c, 0x2c, 0x49, 0xaa, 0x2e,
|
|
0x4e, 0xad, 0xb2, 0x17, 0xad, 0x8c, 0xc0, 0x9b,
|
|
} },
|
|
};
|
|
|
|
errors = 0;
|
|
|
|
for (i = 0; i < sizeof(tests) / sizeof(*tests); i++) {
|
|
if (tests[i].teststring) {
|
|
SHA512_Simple(tests[i].teststring,
|
|
strlen(tests[i].teststring), digest);
|
|
} else {
|
|
SHA512_State s;
|
|
int n;
|
|
SHA512_Init(&s);
|
|
for (n = 0; n < 1000000 / 40; n++)
|
|
SHA512_Bytes(&s, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
|
|
40);
|
|
SHA512_Final(&s, digest);
|
|
}
|
|
for (j = 0; j < 64; j++) {
|
|
if (digest[j] != tests[i].digest512[j]) {
|
|
fprintf(stderr,
|
|
"\"%s\" digest512 byte %d should be 0x%02x, is 0x%02x\n",
|
|
tests[i].teststring, j, tests[i].digest512[j],
|
|
digest[j]);
|
|
errors++;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
printf("%d errors\n", errors);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|