/* sha512.c - SHA384 and SHA512 hash functions * Copyright (C) 2003 Free Software Foundation, Inc. * * Please see below for more legal information! * * This file is part of GnuPG. * * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * GnuPG is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ /* Test vectors from FIPS-180-2: * * "abc" * 384: * CB00753F 45A35E8B B5A03D69 9AC65007 272C32AB 0EDED163 * 1A8B605A 43FF5BED 8086072B A1E7CC23 58BAECA1 34C825A7 * 512: * DDAF35A1 93617ABA CC417349 AE204131 12E6FA4E 89A97EA2 0A9EEEE6 4B55D39A * 2192992A 274FC1A8 36BA3C23 A3FEEBBD 454D4423 643CE80E 2A9AC94F A54CA49F * * "abcdefghbcdefghicdefghijdefghijkefghijklfghijklmghijklmnhijklmnoijklmnopjklmnopqklmnopqrlmnopqrsmnopqrstnopqrstu" * 384: * 09330C33 F71147E8 3D192FC7 82CD1B47 53111B17 3B3B05D2 * 2FA08086 E3B0F712 FCC7C71A 557E2DB9 66C3E9FA 91746039 * 512: * 8E959B75 DAE313DA 8CF4F728 14FC143F 8F7779C6 EB9F7FA1 7299AEAD B6889018 * 501D289E 4900F7E4 331B99DE C4B5433A C7D329EE B6DD2654 5E96E55B 874BE909 * * "a" x 1000000 * 384: * 9D0E1809 716474CB 086E834E 310A4A1C ED149E9C 00F24852 * 7972CEC5 704C2A5B 07B8B3DC 38ECC4EB AE97DDD8 7F3D8985 * 512: * E718483D 0CE76964 4E2E42C7 BC15B463 8E1F98B1 3B204428 5632A803 AFA973EB * DE0FF244 877EA60A 4CB0432C E577C31B EB009C5C 2C49AA2E 4EADB217 AD8CC09B */ #include #include #include "util.h" #include "algorithms.h" typedef struct { u64 h0,h1,h2,h3,h4,h5,h6,h7; u64 nblocks; byte buf[128]; int count; } SHA512_CONTEXT; static void burn_stack (int bytes) { char buf[128]; wipememory(buf,sizeof buf); bytes -= sizeof buf; if (bytes > 0) burn_stack (bytes); } void sha512_init( SHA512_CONTEXT *hd ) { hd->h0 = U64_C(0x6a09e667f3bcc908); hd->h1 = U64_C(0xbb67ae8584caa73b); hd->h2 = U64_C(0x3c6ef372fe94f82b); hd->h3 = U64_C(0xa54ff53a5f1d36f1); hd->h4 = U64_C(0x510e527fade682d1); hd->h5 = U64_C(0x9b05688c2b3e6c1f); hd->h6 = U64_C(0x1f83d9abfb41bd6b); hd->h7 = U64_C(0x5be0cd19137e2179); hd->nblocks = 0; hd->count = 0; } void sha384_init( SHA512_CONTEXT *hd ) { hd->h0 = U64_C(0xcbbb9d5dc1059ed8); hd->h1 = U64_C(0x629a292a367cd507); hd->h2 = U64_C(0x9159015a3070dd17); hd->h3 = U64_C(0x152fecd8f70e5939); hd->h4 = U64_C(0x67332667ffc00b31); hd->h5 = U64_C(0x8eb44a8768581511); hd->h6 = U64_C(0xdb0c2e0d64f98fa7); hd->h7 = U64_C(0x47b5481dbefa4fa4); hd->nblocks = 0; hd->count = 0; } /**************** * Transform the message W which consists of 16 64-bit-words */ static void transform( SHA512_CONTEXT *hd, byte *data ) { u64 a,b,c,d,e,f,g,h; u64 w[80]; int t; static const u64 k[]= { U64_C(0x428a2f98d728ae22), U64_C(0x7137449123ef65cd), U64_C(0xb5c0fbcfec4d3b2f), U64_C(0xe9b5dba58189dbbc), U64_C(0x3956c25bf348b538), U64_C(0x59f111f1b605d019), U64_C(0x923f82a4af194f9b), U64_C(0xab1c5ed5da6d8118), U64_C(0xd807aa98a3030242), U64_C(0x12835b0145706fbe), U64_C(0x243185be4ee4b28c), U64_C(0x550c7dc3d5ffb4e2), U64_C(0x72be5d74f27b896f), U64_C(0x80deb1fe3b1696b1), U64_C(0x9bdc06a725c71235), U64_C(0xc19bf174cf692694), U64_C(0xe49b69c19ef14ad2), U64_C(0xefbe4786384f25e3), U64_C(0x0fc19dc68b8cd5b5), U64_C(0x240ca1cc77ac9c65), U64_C(0x2de92c6f592b0275), U64_C(0x4a7484aa6ea6e483), U64_C(0x5cb0a9dcbd41fbd4), U64_C(0x76f988da831153b5), U64_C(0x983e5152ee66dfab), U64_C(0xa831c66d2db43210), U64_C(0xb00327c898fb213f), U64_C(0xbf597fc7beef0ee4), U64_C(0xc6e00bf33da88fc2), U64_C(0xd5a79147930aa725), U64_C(0x06ca6351e003826f), U64_C(0x142929670a0e6e70), U64_C(0x27b70a8546d22ffc), U64_C(0x2e1b21385c26c926), U64_C(0x4d2c6dfc5ac42aed), U64_C(0x53380d139d95b3df), U64_C(0x650a73548baf63de), U64_C(0x766a0abb3c77b2a8), U64_C(0x81c2c92e47edaee6), U64_C(0x92722c851482353b), U64_C(0xa2bfe8a14cf10364), U64_C(0xa81a664bbc423001), U64_C(0xc24b8b70d0f89791), U64_C(0xc76c51a30654be30), U64_C(0xd192e819d6ef5218), U64_C(0xd69906245565a910), U64_C(0xf40e35855771202a), U64_C(0x106aa07032bbd1b8), U64_C(0x19a4c116b8d2d0c8), U64_C(0x1e376c085141ab53), U64_C(0x2748774cdf8eeb99), U64_C(0x34b0bcb5e19b48a8), U64_C(0x391c0cb3c5c95a63), U64_C(0x4ed8aa4ae3418acb), U64_C(0x5b9cca4f7763e373), U64_C(0x682e6ff3d6b2b8a3), U64_C(0x748f82ee5defb2fc), U64_C(0x78a5636f43172f60), U64_C(0x84c87814a1f0ab72), U64_C(0x8cc702081a6439ec), U64_C(0x90befffa23631e28), U64_C(0xa4506cebde82bde9), U64_C(0xbef9a3f7b2c67915), U64_C(0xc67178f2e372532b), U64_C(0xca273eceea26619c), U64_C(0xd186b8c721c0c207), U64_C(0xeada7dd6cde0eb1e), U64_C(0xf57d4f7fee6ed178), U64_C(0x06f067aa72176fba), U64_C(0x0a637dc5a2c898a6), U64_C(0x113f9804bef90dae), U64_C(0x1b710b35131c471b), U64_C(0x28db77f523047d84), U64_C(0x32caab7b40c72493), U64_C(0x3c9ebe0a15c9bebc), U64_C(0x431d67c49c100d4c), U64_C(0x4cc5d4becb3e42b6), U64_C(0x597f299cfc657e2a), U64_C(0x5fcb6fab3ad6faec), U64_C(0x6c44198c4a475817) }; /* get values from the chaining vars */ a = hd->h0; b = hd->h1; c = hd->h2; d = hd->h3; e = hd->h4; f = hd->h5; g = hd->h6; h = hd->h7; #ifdef BIG_ENDIAN_HOST memcpy( w, data, 128 ); #else { int i; byte *p2; for(i=0, p2=(byte*)w; i < 16; i++, p2 += 8 ) { p2[7] = *data++; p2[6] = *data++; p2[5] = *data++; p2[4] = *data++; p2[3] = *data++; p2[2] = *data++; p2[1] = *data++; p2[0] = *data++; } } #endif #define ROTR(x,n) (((x)>>(n)) | ((x)<<(64-(n)))) #define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) #define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) #define Sum0(x) (ROTR((x),28) ^ ROTR((x),34) ^ ROTR((x),39)) #define Sum1(x) (ROTR((x),14) ^ ROTR((x),18) ^ ROTR((x),41)) #define S0(x) (ROTR((x),1) ^ ROTR((x),8) ^ ((x)>>7)) #define S1(x) (ROTR((x),19) ^ ROTR((x),61) ^ ((x)>>6)) for(t=16;t<80;t++) w[t] = S1(w[t-2]) + w[t-7] + S0(w[t-15]) + w[t-16]; for(t=0;t<80;t++) { u64 t1,t2; t1=h+Sum1(e)+Ch(e,f,g)+k[t]+w[t]; t2=Sum0(a)+Maj(a,b,c); h=g; g=f; f=e; e=d+t1; d=c; c=b; b=a; a=t1+t2; /* printf("t=%d a=%016llX b=%016llX c=%016llX d=%016llX e=%016llX f=%016llX g=%016llX h=%016llX\n",t,a,b,c,d,e,f,g,h); */ } /* update chaining vars */ hd->h0 += a; hd->h1 += b; hd->h2 += c; hd->h3 += d; hd->h4 += e; hd->h5 += f; hd->h6 += g; hd->h7 += h; } /* Update the message digest with the contents * of INBUF with length INLEN. */ static void sha512_write( SHA512_CONTEXT *hd, byte *inbuf, size_t inlen) { if( hd->count == 128 ) { /* flush the buffer */ transform( hd, hd->buf ); burn_stack (768); hd->count = 0; hd->nblocks++; } if( !inbuf ) return; if( hd->count ) { for( ; inlen && hd->count < 128; inlen-- ) hd->buf[hd->count++] = *inbuf++; sha512_write( hd, NULL, 0 ); if( !inlen ) return; } while( inlen >= 128 ) { transform( hd, inbuf ); hd->count = 0; hd->nblocks++; inlen -= 128; inbuf += 128; } burn_stack (768); for( ; inlen && hd->count < 128; inlen-- ) hd->buf[hd->count++] = *inbuf++; } /* The routine final terminates the computation and * returns the digest. * The handle is prepared for a new cycle, but adding bytes to the * handle will the destroy the returned buffer. * Returns: 64 bytes representing the digest. When used for sha384, * we take the leftmost 48 of those bytes. */ static void sha512_final(SHA512_CONTEXT *hd) { u64 t, msb, lsb; byte *p; sha512_write(hd, NULL, 0); /* flush */; t = hd->nblocks; /* multiply by 128 to make a byte count */ lsb = t << 7; msb = t >> 57; /* add the count */ t = lsb; if( (lsb += hd->count) < t ) msb++; /* multiply by 8 to make a bit count */ t = lsb; lsb <<= 3; msb <<= 3; msb |= t >> 61; if( hd->count < 112 ) { /* enough room */ hd->buf[hd->count++] = 0x80; /* pad */ while( hd->count < 112 ) hd->buf[hd->count++] = 0; /* pad */ } else { /* need one extra block */ hd->buf[hd->count++] = 0x80; /* pad character */ while( hd->count < 128 ) hd->buf[hd->count++] = 0; sha512_write(hd, NULL, 0); /* flush */; memset(hd->buf, 0, 112 ); /* fill next block with zeroes */ } /* append the 128 bit count */ hd->buf[112] = msb >> 56; hd->buf[113] = msb >> 48; hd->buf[114] = msb >> 40; hd->buf[115] = msb >> 32; hd->buf[116] = msb >> 24; hd->buf[117] = msb >> 16; hd->buf[118] = msb >> 8; hd->buf[119] = msb ; hd->buf[120] = lsb >> 56; hd->buf[121] = lsb >> 48; hd->buf[122] = lsb >> 40; hd->buf[123] = lsb >> 32; hd->buf[124] = lsb >> 24; hd->buf[125] = lsb >> 16; hd->buf[126] = lsb >> 8; hd->buf[127] = lsb ; transform( hd, hd->buf ); burn_stack (768); p = hd->buf; #ifdef BIG_ENDIAN_HOST #define X(a) do { *(u64*)p = hd->h##a ; p += 8; } while(0) #else /* little endian */ #define X(a) do { *p++ = hd->h##a >> 56; *p++ = hd->h##a >> 48; \ *p++ = hd->h##a >> 40; *p++ = hd->h##a >> 32; \ *p++ = hd->h##a >> 24; *p++ = hd->h##a >> 16; \ *p++ = hd->h##a >> 8; *p++ = hd->h##a; } while(0) #endif X(0); X(1); X(2); X(3); X(4); X(5); /* Note that these last two chunks are included even for SHA384. We just ignore them. */ X(6); X(7); #undef X } static byte * sha512_read( SHA512_CONTEXT *hd ) { return hd->buf; } /**************** * Return some information about the algorithm. We need algo here to * distinguish different flavors of the algorithm. * Returns: A pointer to string describing the algorithm or NULL if * the ALGO is invalid. */ const char * sha512_get_info( int algo, size_t *contextsize, byte **r_asnoid, int *r_asnlen, int *r_mdlen, void (**r_init)( void *c ), void (**r_write)( void *c, byte *buf, size_t nbytes ), void (**r_final)( void *c ), byte *(**r_read)( void *c ) ) { static byte asn[] = /* Object ID is 2.16.840.1.101.3.4.2.3 */ { 0x30, 0x51, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03, 0x05, 0x00, 0x04, 0x40 }; if( algo != 10 ) return NULL; *contextsize = sizeof(SHA512_CONTEXT); *r_asnoid = asn; *r_asnlen = DIM(asn); *r_mdlen = 64; *(void (**)(SHA512_CONTEXT *))r_init = sha512_init; *(void (**)(SHA512_CONTEXT *, byte*, size_t))r_write = sha512_write; *(void (**)(SHA512_CONTEXT *))r_final = sha512_final; *(byte *(**)(SHA512_CONTEXT *))r_read = sha512_read; return "SHA512"; } /* SHA384 is really a truncated SHA512 with a different initialization */ const char * sha384_get_info( int algo, size_t *contextsize, byte **r_asnoid, int *r_asnlen, int *r_mdlen, void (**r_init)( void *c ), void (**r_write)( void *c, byte *buf, size_t nbytes ), void (**r_final)( void *c ), byte *(**r_read)( void *c ) ) { static byte asn[] = /* Object ID is 2.16.840.1.101.3.4.2.2 */ { 0x30, 0x41, 0x30, 0x0d, 0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x02, 0x05, 0x00, 0x04, 0x30 }; if( algo != 9 ) return NULL; *contextsize = sizeof(SHA512_CONTEXT); *r_asnoid = asn; *r_asnlen = DIM(asn); *r_mdlen = 48; *(void (**)(SHA512_CONTEXT *))r_init = sha384_init; *(void (**)(SHA512_CONTEXT *, byte*, size_t))r_write = sha512_write; *(void (**)(SHA512_CONTEXT *))r_final = sha512_final; *(byte *(**)(SHA512_CONTEXT *))r_read = sha512_read; return "SHA384"; }