Mercurial > dropbear
view libtomcrypt/src/hashes/sha2/sha256.c @ 1938:77bc00dcc19f default tip main master
Bump version to 2022.82
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 01 Apr 2022 14:43:27 +0800 |
parents | 6dba84798cd5 |
children |
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/* LibTomCrypt, modular cryptographic library -- Tom St Denis * * LibTomCrypt is a library that provides various cryptographic * algorithms in a highly modular and flexible manner. * * The library is free for all purposes without any express * guarantee it works. */ #include "tomcrypt.h" /** @file sha256.c LTC_SHA256 by Tom St Denis */ #ifdef LTC_SHA256 const struct ltc_hash_descriptor sha256_desc = { "sha256", 0, 32, 64, /* OID */ { 2, 16, 840, 1, 101, 3, 4, 2, 1, }, 9, &sha256_init, &sha256_process, &sha256_done, &sha256_test, NULL }; #ifdef LTC_SMALL_CODE /* the K array */ static const ulong32 K[64] = { 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL, 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL, 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL, 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL, 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL, 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL, 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL, 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL, 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL, 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL }; #endif /* Various logical functions */ #define Ch(x,y,z) (z ^ (x & (y ^ z))) #define Maj(x,y,z) (((x | y) & z) | (x & y)) #define S(x, n) RORc((x),(n)) #define R(x, n) (((x)&0xFFFFFFFFUL)>>(n)) #define Sigma0(x) (S(x, 2) ^ S(x, 13) ^ S(x, 22)) #define Sigma1(x) (S(x, 6) ^ S(x, 11) ^ S(x, 25)) #define Gamma0(x) (S(x, 7) ^ S(x, 18) ^ R(x, 3)) #define Gamma1(x) (S(x, 17) ^ S(x, 19) ^ R(x, 10)) /* compress 512-bits */ #ifdef LTC_CLEAN_STACK static int _sha256_compress(hash_state * md, unsigned char *buf) #else static int sha256_compress(hash_state * md, unsigned char *buf) #endif { ulong32 S[8], W[64], t0, t1; #ifdef LTC_SMALL_CODE ulong32 t; #endif int i; /* copy state into S */ for (i = 0; i < 8; i++) { S[i] = md->sha256.state[i]; } /* copy the state into 512-bits into W[0..15] */ for (i = 0; i < 16; i++) { LOAD32H(W[i], buf + (4*i)); } /* fill W[16..63] */ for (i = 16; i < 64; i++) { W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + W[i - 16]; } /* Compress */ #ifdef LTC_SMALL_CODE #define RND(a,b,c,d,e,f,g,h,i) \ t0 = h + Sigma1(e) + Ch(e, f, g) + K[i] + W[i]; \ t1 = Sigma0(a) + Maj(a, b, c); \ d += t0; \ h = t0 + t1; for (i = 0; i < 64; ++i) { RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],i); t = S[7]; S[7] = S[6]; S[6] = S[5]; S[5] = S[4]; S[4] = S[3]; S[3] = S[2]; S[2] = S[1]; S[1] = S[0]; S[0] = t; } #else #define RND(a,b,c,d,e,f,g,h,i,ki) \ t0 = h + Sigma1(e) + Ch(e, f, g) + ki + W[i]; \ t1 = Sigma0(a) + Maj(a, b, c); \ d += t0; \ h = t0 + t1; RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],0,0x428a2f98); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],1,0x71374491); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],2,0xb5c0fbcf); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],3,0xe9b5dba5); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],4,0x3956c25b); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],5,0x59f111f1); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],6,0x923f82a4); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],7,0xab1c5ed5); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],8,0xd807aa98); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],9,0x12835b01); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],10,0x243185be); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],11,0x550c7dc3); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],12,0x72be5d74); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],13,0x80deb1fe); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],14,0x9bdc06a7); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],15,0xc19bf174); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],16,0xe49b69c1); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],17,0xefbe4786); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],18,0x0fc19dc6); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],19,0x240ca1cc); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],20,0x2de92c6f); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],21,0x4a7484aa); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],22,0x5cb0a9dc); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],23,0x76f988da); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],24,0x983e5152); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],25,0xa831c66d); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],26,0xb00327c8); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],27,0xbf597fc7); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],28,0xc6e00bf3); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],29,0xd5a79147); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],30,0x06ca6351); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],31,0x14292967); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],32,0x27b70a85); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],33,0x2e1b2138); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],34,0x4d2c6dfc); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],35,0x53380d13); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],36,0x650a7354); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],37,0x766a0abb); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],38,0x81c2c92e); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],39,0x92722c85); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],40,0xa2bfe8a1); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],41,0xa81a664b); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],42,0xc24b8b70); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],43,0xc76c51a3); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],44,0xd192e819); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],45,0xd6990624); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],46,0xf40e3585); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],47,0x106aa070); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],48,0x19a4c116); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],49,0x1e376c08); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],50,0x2748774c); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],51,0x34b0bcb5); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],52,0x391c0cb3); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],53,0x4ed8aa4a); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],54,0x5b9cca4f); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],55,0x682e6ff3); RND(S[0],S[1],S[2],S[3],S[4],S[5],S[6],S[7],56,0x748f82ee); RND(S[7],S[0],S[1],S[2],S[3],S[4],S[5],S[6],57,0x78a5636f); RND(S[6],S[7],S[0],S[1],S[2],S[3],S[4],S[5],58,0x84c87814); RND(S[5],S[6],S[7],S[0],S[1],S[2],S[3],S[4],59,0x8cc70208); RND(S[4],S[5],S[6],S[7],S[0],S[1],S[2],S[3],60,0x90befffa); RND(S[3],S[4],S[5],S[6],S[7],S[0],S[1],S[2],61,0xa4506ceb); RND(S[2],S[3],S[4],S[5],S[6],S[7],S[0],S[1],62,0xbef9a3f7); RND(S[1],S[2],S[3],S[4],S[5],S[6],S[7],S[0],63,0xc67178f2); #undef RND #endif /* feedback */ for (i = 0; i < 8; i++) { md->sha256.state[i] = md->sha256.state[i] + S[i]; } return CRYPT_OK; } #ifdef LTC_CLEAN_STACK static int sha256_compress(hash_state * md, unsigned char *buf) { int err; err = _sha256_compress(md, buf); burn_stack(sizeof(ulong32) * 74); return err; } #endif /** Initialize the hash state @param md The hash state you wish to initialize @return CRYPT_OK if successful */ int sha256_init(hash_state * md) { LTC_ARGCHK(md != NULL); md->sha256.curlen = 0; md->sha256.length = 0; md->sha256.state[0] = 0x6A09E667UL; md->sha256.state[1] = 0xBB67AE85UL; md->sha256.state[2] = 0x3C6EF372UL; md->sha256.state[3] = 0xA54FF53AUL; md->sha256.state[4] = 0x510E527FUL; md->sha256.state[5] = 0x9B05688CUL; md->sha256.state[6] = 0x1F83D9ABUL; md->sha256.state[7] = 0x5BE0CD19UL; return CRYPT_OK; } /** Process a block of memory though the hash @param md The hash state @param in The data to hash @param inlen The length of the data (octets) @return CRYPT_OK if successful */ HASH_PROCESS(sha256_process, sha256_compress, sha256, 64) /** Terminate the hash to get the digest @param md The hash state @param out [out] The destination of the hash (32 bytes) @return CRYPT_OK if successful */ int sha256_done(hash_state * md, unsigned char *out) { int i; LTC_ARGCHK(md != NULL); LTC_ARGCHK(out != NULL); if (md->sha256.curlen >= sizeof(md->sha256.buf)) { return CRYPT_INVALID_ARG; } /* increase the length of the message */ md->sha256.length += md->sha256.curlen * 8; /* append the '1' bit */ md->sha256.buf[md->sha256.curlen++] = (unsigned char)0x80; /* if the length is currently above 56 bytes we append zeros * then compress. Then we can fall back to padding zeros and length * encoding like normal. */ if (md->sha256.curlen > 56) { while (md->sha256.curlen < 64) { md->sha256.buf[md->sha256.curlen++] = (unsigned char)0; } sha256_compress(md, md->sha256.buf); md->sha256.curlen = 0; } /* pad upto 56 bytes of zeroes */ while (md->sha256.curlen < 56) { md->sha256.buf[md->sha256.curlen++] = (unsigned char)0; } /* store length */ STORE64H(md->sha256.length, md->sha256.buf+56); sha256_compress(md, md->sha256.buf); /* copy output */ for (i = 0; i < 8; i++) { STORE32H(md->sha256.state[i], out+(4*i)); } #ifdef LTC_CLEAN_STACK zeromem(md, sizeof(hash_state)); #endif return CRYPT_OK; } /** Self-test the hash @return CRYPT_OK if successful, CRYPT_NOP if self-tests have been disabled */ int sha256_test(void) { #ifndef LTC_TEST return CRYPT_NOP; #else static const struct { const char *msg; unsigned char hash[32]; } tests[] = { { "abc", { 0xba, 0x78, 0x16, 0xbf, 0x8f, 0x01, 0xcf, 0xea, 0x41, 0x41, 0x40, 0xde, 0x5d, 0xae, 0x22, 0x23, 0xb0, 0x03, 0x61, 0xa3, 0x96, 0x17, 0x7a, 0x9c, 0xb4, 0x10, 0xff, 0x61, 0xf2, 0x00, 0x15, 0xad } }, { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", { 0x24, 0x8d, 0x6a, 0x61, 0xd2, 0x06, 0x38, 0xb8, 0xe5, 0xc0, 0x26, 0x93, 0x0c, 0x3e, 0x60, 0x39, 0xa3, 0x3c, 0xe4, 0x59, 0x64, 0xff, 0x21, 0x67, 0xf6, 0xec, 0xed, 0xd4, 0x19, 0xdb, 0x06, 0xc1 } }, }; int i; unsigned char tmp[32]; hash_state md; for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) { sha256_init(&md); sha256_process(&md, (unsigned char*)tests[i].msg, (unsigned long)strlen(tests[i].msg)); sha256_done(&md, tmp); if (compare_testvector(tmp, sizeof(tmp), tests[i].hash, sizeof(tests[i].hash), "SHA256", i)) { return CRYPT_FAIL_TESTVECTOR; } } return CRYPT_OK; #endif } #endif /* ref: $Format:%D$ */ /* git commit: $Format:%H$ */ /* commit time: $Format:%ai$ */