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Diffstat (limited to 'cipher/sha512.c')
| -rw-r--r-- | cipher/sha512.c | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/cipher/sha512.c b/cipher/sha512.c new file mode 100644 index 000000000..9270ef24d --- /dev/null +++ b/cipher/sha512.c @@ -0,0 +1,416 @@ +/* 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 2 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, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA + */ + + +/* 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 <config.h> +#include <string.h> +#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 = 0x6a09e667f3bcc908; + hd->h1 = 0xbb67ae8584caa73b; + hd->h2 = 0x3c6ef372fe94f82b; + hd->h3 = 0xa54ff53a5f1d36f1; + hd->h4 = 0x510e527fade682d1; + hd->h5 = 0x9b05688c2b3e6c1f; + hd->h6 = 0x1f83d9abfb41bd6b; + hd->h7 = 0x5be0cd19137e2179; + + hd->nblocks = 0; + hd->count = 0; +} + +void +sha384_init( SHA512_CONTEXT *hd ) +{ + hd->h0 = 0xcbbb9d5dc1059ed8; + hd->h1 = 0x629a292a367cd507; + hd->h2 = 0x9159015a3070dd17; + hd->h3 = 0x152fecd8f70e5939; + hd->h4 = 0x67332667ffc00b31; + hd->h5 = 0x8eb44a8768581511; + hd->h6 = 0xdb0c2e0d64f98fa7; + hd->h7 = 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[]= + { + 0x428a2f98d728ae22, 0x7137449123ef65cd, 0xb5c0fbcfec4d3b2f, + 0xe9b5dba58189dbbc, 0x3956c25bf348b538, 0x59f111f1b605d019, + 0x923f82a4af194f9b, 0xab1c5ed5da6d8118, 0xd807aa98a3030242, + 0x12835b0145706fbe, 0x243185be4ee4b28c, 0x550c7dc3d5ffb4e2, + 0x72be5d74f27b896f, 0x80deb1fe3b1696b1, 0x9bdc06a725c71235, + 0xc19bf174cf692694, 0xe49b69c19ef14ad2, 0xefbe4786384f25e3, + 0x0fc19dc68b8cd5b5, 0x240ca1cc77ac9c65, 0x2de92c6f592b0275, + 0x4a7484aa6ea6e483, 0x5cb0a9dcbd41fbd4, 0x76f988da831153b5, + 0x983e5152ee66dfab, 0xa831c66d2db43210, 0xb00327c898fb213f, + 0xbf597fc7beef0ee4, 0xc6e00bf33da88fc2, 0xd5a79147930aa725, + 0x06ca6351e003826f, 0x142929670a0e6e70, 0x27b70a8546d22ffc, + 0x2e1b21385c26c926, 0x4d2c6dfc5ac42aed, 0x53380d139d95b3df, + 0x650a73548baf63de, 0x766a0abb3c77b2a8, 0x81c2c92e47edaee6, + 0x92722c851482353b, 0xa2bfe8a14cf10364, 0xa81a664bbc423001, + 0xc24b8b70d0f89791, 0xc76c51a30654be30, 0xd192e819d6ef5218, + 0xd69906245565a910, 0xf40e35855771202a, 0x106aa07032bbd1b8, + 0x19a4c116b8d2d0c8, 0x1e376c085141ab53, 0x2748774cdf8eeb99, + 0x34b0bcb5e19b48a8, 0x391c0cb3c5c95a63, 0x4ed8aa4ae3418acb, + 0x5b9cca4f7763e373, 0x682e6ff3d6b2b8a3, 0x748f82ee5defb2fc, + 0x78a5636f43172f60, 0x84c87814a1f0ab72, 0x8cc702081a6439ec, + 0x90befffa23631e28, 0xa4506cebde82bde9, 0xbef9a3f7b2c67915, + 0xc67178f2e372532b, 0xca273eceea26619c, 0xd186b8c721c0c207, + 0xeada7dd6cde0eb1e, 0xf57d4f7fee6ed178, 0x06f067aa72176fba, + 0x0a637dc5a2c898a6, 0x113f9804bef90dae, 0x1b710b35131c471b, + 0x28db77f523047d84, 0x32caab7b40c72493, 0x3c9ebe0a15c9bebc, + 0x431d67c49c100d4c, 0x4cc5d4becb3e42b6, 0x597f299cfc657e2a, + 0x5fcb6fab3ad6faec, 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"; +} |