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Diffstat (limited to 'storage/maria/libmarias3/src/sha256-internal.c')
| -rw-r--r-- | storage/maria/libmarias3/src/sha256-internal.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/storage/maria/libmarias3/src/sha256-internal.c b/storage/maria/libmarias3/src/sha256-internal.c new file mode 100644 index 00000000..3be8aa3c --- /dev/null +++ b/storage/maria/libmarias3/src/sha256-internal.c @@ -0,0 +1,251 @@ +/* + * SHA-256 hash implementation and interface functions + * Copyright (c) 2003-2011, Jouni Malinen <j@w1.fi> + * + * This software may be distributed under the terms of the BSD license. + * See README for more details. + */ + +#include "sha256.h" +#include "sha256_i.h" + + +/** + * sha256_vector - SHA256 hash for data vector + * @num_elem: Number of elements in the data vector + * @addr: Pointers to the data areas + * @len: Lengths of the data blocks + * @mac: Buffer for the hash + * Returns: 0 on success, -1 of failure + */ +int sha256_vector(size_t num_elem, const uint8_t *addr[], const size_t *len, + uint8_t *mac) +{ + struct sha256_state ctx; + size_t i; + + sha256_init(&ctx); + + for (i = 0; i < num_elem; i++) + if (sha256_process(&ctx, addr[i], len[i])) + return -1; + + if (sha256_done(&ctx, mac)) + return -1; + + return 0; +} + + +/* ===== start - public domain SHA256 implementation ===== */ + +/* This is based on SHA256 implementation in LibTomCrypt that was released into + * public domain by Tom St Denis. */ + +/* the K array */ +static const uint32_t 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 +}; + + +/* Various logical functions */ +#define RORc(x, y) \ +( ((((uint32_t) (x) & 0xFFFFFFFFUL) >> (uint32_t) ((y) & 31)) | \ + ((uint32_t) (x) << (uint32_t) (32 - ((y) & 31)))) & 0xFFFFFFFFUL) +#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)) +#ifndef MIN +#define MIN(x, y) (((x) < (y)) ? (x) : (y)) +#endif + +/* compress 512-bits */ +static int sha256_compress(struct sha256_state *md, unsigned char *buf) +{ + uint32_t S[8], W[64]; + int i; + + /* copy state into S */ + for (i = 0; i < 8; i++) + { + S[i] = md->state[i]; + } + + /* copy the state into 512-bits into W[0..15] */ + for (i = 0; i < 16; i++) + W[i] = WPA_GET_BE32(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 */ +#define RND(a,b,c,d,e,f,g,h,i) \ + uint32_t t0, t1; \ + 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) + { + uint32_t t; + 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; + } + + /* feedback */ + for (i = 0; i < 8; i++) + { + md->state[i] = md->state[i] + S[i]; + } + + return 0; +} + + +/* Initialize the hash state */ +void sha256_init(struct sha256_state *md) +{ + md->curlen = 0; + md->length = 0; + md->state[0] = 0x6A09E667UL; + md->state[1] = 0xBB67AE85UL; + md->state[2] = 0x3C6EF372UL; + md->state[3] = 0xA54FF53AUL; + md->state[4] = 0x510E527FUL; + md->state[5] = 0x9B05688CUL; + md->state[6] = 0x1F83D9ABUL; + md->state[7] = 0x5BE0CD19UL; +} + +/** + 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 +*/ +int sha256_process(struct sha256_state *md, const unsigned char *in, + unsigned long inlen) +{ + unsigned long n; + + if (md->curlen >= sizeof(md->buf)) + return -1; + + while (inlen > 0) + { + if (md->curlen == 0 && inlen >= SHA256_BLOCK_SIZE) + { + if (sha256_compress(md, (unsigned char *) in) < 0) + return -1; + + md->length += SHA256_BLOCK_SIZE * 8; + in += SHA256_BLOCK_SIZE; + inlen -= SHA256_BLOCK_SIZE; + } + else + { + n = MIN(inlen, (SHA256_BLOCK_SIZE - md->curlen)); + memcpy(md->buf + md->curlen, in, n); + md->curlen += n; + in += n; + inlen -= n; + + if (md->curlen == SHA256_BLOCK_SIZE) + { + if (sha256_compress(md, md->buf) < 0) + return -1; + + md->length += 8 * SHA256_BLOCK_SIZE; + md->curlen = 0; + } + } + } + + return 0; +} + + +/** + 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(struct sha256_state *md, unsigned char *out) +{ + int i; + + if (md->curlen >= sizeof(md->buf)) + return -1; + + /* increase the length of the message */ + md->length += md->curlen * 8; + + /* append the '1' bit */ + md->buf[md->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->curlen > 56) + { + while (md->curlen < SHA256_BLOCK_SIZE) + { + md->buf[md->curlen++] = (unsigned char) 0; + } + + sha256_compress(md, md->buf); + md->curlen = 0; + } + + /* pad up to 56 bytes of zeroes */ + while (md->curlen < 56) + { + md->buf[md->curlen++] = (unsigned char) 0; + } + + /* store length */ + WPA_PUT_BE64(md->buf + 56, md->length); + sha256_compress(md, md->buf); + + /* copy output */ + for (i = 0; i < 8; i++) + WPA_PUT_BE32(out + (4 * i), md->state[i]); + + return 0; +} + +/* ===== end - public domain SHA256 implementation ===== */ |