X-Git-Url: http://www.project-moonshot.org/gitweb/?p=mech_eap.git;a=blobdiff_plain;f=libeap%2Fsrc%2Fcrypto%2Fsha512-internal.c;fp=libeap%2Fsrc%2Fcrypto%2Fsha512-internal.c;h=76c4fe750b65f977be953c08206b684c485e7b62;hp=0000000000000000000000000000000000000000;hb=d1dd9aae6741e74f20bfc35e1db598652680279d;hpb=bd3bd69af16ab99706ba70ed11a3e291e968e5c6 diff --git a/libeap/src/crypto/sha512-internal.c b/libeap/src/crypto/sha512-internal.c new file mode 100644 index 0000000..76c4fe7 --- /dev/null +++ b/libeap/src/crypto/sha512-internal.c @@ -0,0 +1,264 @@ +/* + * SHA-512 hash implementation and interface functions + * Copyright (c) 2015, Pali Rohár + * + * This software may be distributed under the terms of the BSD license. + * See README for more details. + */ + +#include "includes.h" + +#include "common.h" +#include "sha512_i.h" +#include "crypto.h" + + +/** + * sha512_vector - SHA512 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 sha512_vector(size_t num_elem, const u8 *addr[], const size_t *len, + u8 *mac) +{ + struct sha512_state ctx; + size_t i; + + sha512_init(&ctx); + for (i = 0; i < num_elem; i++) + if (sha512_process(&ctx, addr[i], len[i])) + return -1; + if (sha512_done(&ctx, mac)) + return -1; + return 0; +} + + +/* ===== start - public domain SHA512 implementation ===== */ + +/* This is based on SHA512 implementation in LibTomCrypt that was released into + * public domain by Tom St Denis. */ + +#define CONST64(n) n ## ULL + +/* the K array */ +static const u64 K[80] = { + CONST64(0x428a2f98d728ae22), CONST64(0x7137449123ef65cd), + CONST64(0xb5c0fbcfec4d3b2f), CONST64(0xe9b5dba58189dbbc), + CONST64(0x3956c25bf348b538), CONST64(0x59f111f1b605d019), + CONST64(0x923f82a4af194f9b), CONST64(0xab1c5ed5da6d8118), + CONST64(0xd807aa98a3030242), CONST64(0x12835b0145706fbe), + CONST64(0x243185be4ee4b28c), CONST64(0x550c7dc3d5ffb4e2), + CONST64(0x72be5d74f27b896f), CONST64(0x80deb1fe3b1696b1), + CONST64(0x9bdc06a725c71235), CONST64(0xc19bf174cf692694), + CONST64(0xe49b69c19ef14ad2), CONST64(0xefbe4786384f25e3), + CONST64(0x0fc19dc68b8cd5b5), CONST64(0x240ca1cc77ac9c65), + CONST64(0x2de92c6f592b0275), CONST64(0x4a7484aa6ea6e483), + CONST64(0x5cb0a9dcbd41fbd4), CONST64(0x76f988da831153b5), + CONST64(0x983e5152ee66dfab), CONST64(0xa831c66d2db43210), + CONST64(0xb00327c898fb213f), CONST64(0xbf597fc7beef0ee4), + CONST64(0xc6e00bf33da88fc2), CONST64(0xd5a79147930aa725), + CONST64(0x06ca6351e003826f), CONST64(0x142929670a0e6e70), + CONST64(0x27b70a8546d22ffc), CONST64(0x2e1b21385c26c926), + CONST64(0x4d2c6dfc5ac42aed), CONST64(0x53380d139d95b3df), + CONST64(0x650a73548baf63de), CONST64(0x766a0abb3c77b2a8), + CONST64(0x81c2c92e47edaee6), CONST64(0x92722c851482353b), + CONST64(0xa2bfe8a14cf10364), CONST64(0xa81a664bbc423001), + CONST64(0xc24b8b70d0f89791), CONST64(0xc76c51a30654be30), + CONST64(0xd192e819d6ef5218), CONST64(0xd69906245565a910), + CONST64(0xf40e35855771202a), CONST64(0x106aa07032bbd1b8), + CONST64(0x19a4c116b8d2d0c8), CONST64(0x1e376c085141ab53), + CONST64(0x2748774cdf8eeb99), CONST64(0x34b0bcb5e19b48a8), + CONST64(0x391c0cb3c5c95a63), CONST64(0x4ed8aa4ae3418acb), + CONST64(0x5b9cca4f7763e373), CONST64(0x682e6ff3d6b2b8a3), + CONST64(0x748f82ee5defb2fc), CONST64(0x78a5636f43172f60), + CONST64(0x84c87814a1f0ab72), CONST64(0x8cc702081a6439ec), + CONST64(0x90befffa23631e28), CONST64(0xa4506cebde82bde9), + CONST64(0xbef9a3f7b2c67915), CONST64(0xc67178f2e372532b), + CONST64(0xca273eceea26619c), CONST64(0xd186b8c721c0c207), + CONST64(0xeada7dd6cde0eb1e), CONST64(0xf57d4f7fee6ed178), + CONST64(0x06f067aa72176fba), CONST64(0x0a637dc5a2c898a6), + CONST64(0x113f9804bef90dae), CONST64(0x1b710b35131c471b), + CONST64(0x28db77f523047d84), CONST64(0x32caab7b40c72493), + CONST64(0x3c9ebe0a15c9bebc), CONST64(0x431d67c49c100d4c), + CONST64(0x4cc5d4becb3e42b6), CONST64(0x597f299cfc657e2a), + CONST64(0x5fcb6fab3ad6faec), CONST64(0x6c44198c4a475817) +}; + +/* 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) ROR64c(x, n) +#define R(x, n) (((x) & CONST64(0xFFFFFFFFFFFFFFFF)) >> ((u64) n)) +#define Sigma0(x) (S(x, 28) ^ S(x, 34) ^ S(x, 39)) +#define Sigma1(x) (S(x, 14) ^ S(x, 18) ^ S(x, 41)) +#define Gamma0(x) (S(x, 1) ^ S(x, 8) ^ R(x, 7)) +#define Gamma1(x) (S(x, 19) ^ S(x, 61) ^ R(x, 6)) +#ifndef MIN +#define MIN(x, y) (((x) < (y)) ? (x) : (y)) +#endif + +#define ROR64c(x, y) \ + ( ((((x) & CONST64(0xFFFFFFFFFFFFFFFF)) >> ((u64) (y) & CONST64(63))) | \ + ((x) << ((u64) (64 - ((y) & CONST64(63)))))) & \ + CONST64(0xFFFFFFFFFFFFFFFF)) + +/* compress 1024-bits */ +static int sha512_compress(struct sha512_state *md, unsigned char *buf) +{ + u64 S[8], W[80], t0, t1; + int i; + + /* copy state into S */ + for (i = 0; i < 8; i++) { + S[i] = md->state[i]; + } + + /* copy the state into 1024-bits into W[0..15] */ + for (i = 0; i < 16; i++) + W[i] = WPA_GET_BE64(buf + (8 * i)); + + /* fill W[16..79] */ + for (i = 16; i < 80; i++) { + W[i] = Gamma1(W[i - 2]) + W[i - 7] + Gamma0(W[i - 15]) + + W[i - 16]; + } + + /* Compress */ + for (i = 0; i < 80; i++) { + t0 = S[7] + Sigma1(S[4]) + Ch(S[4], S[5], S[6]) + K[i] + W[i]; + t1 = Sigma0(S[0]) + Maj(S[0], S[1], S[2]); + S[7] = S[6]; + S[6] = S[5]; + S[5] = S[4]; + S[4] = S[3] + t0; + S[3] = S[2]; + S[2] = S[1]; + S[1] = S[0]; + S[0] = t0 + t1; + } + + /* feedback */ + for (i = 0; i < 8; i++) { + md->state[i] = md->state[i] + S[i]; + } + + return 0; +} + + +/** + Initialize the hash state + @param md The hash state you wish to initialize + @return CRYPT_OK if successful +*/ +void sha512_init(struct sha512_state *md) +{ + md->curlen = 0; + md->length = 0; + md->state[0] = CONST64(0x6a09e667f3bcc908); + md->state[1] = CONST64(0xbb67ae8584caa73b); + md->state[2] = CONST64(0x3c6ef372fe94f82b); + md->state[3] = CONST64(0xa54ff53a5f1d36f1); + md->state[4] = CONST64(0x510e527fade682d1); + md->state[5] = CONST64(0x9b05688c2b3e6c1f); + md->state[6] = CONST64(0x1f83d9abfb41bd6b); + md->state[7] = CONST64(0x5be0cd19137e2179); +} + + +/** + 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 sha512_process(struct sha512_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 >= SHA512_BLOCK_SIZE) { + if (sha512_compress(md, (unsigned char *) in) < 0) + return -1; + md->length += SHA512_BLOCK_SIZE * 8; + in += SHA512_BLOCK_SIZE; + inlen -= SHA512_BLOCK_SIZE; + } else { + n = MIN(inlen, (SHA512_BLOCK_SIZE - md->curlen)); + os_memcpy(md->buf + md->curlen, in, n); + md->curlen += n; + in += n; + inlen -= n; + if (md->curlen == SHA512_BLOCK_SIZE) { + if (sha512_compress(md, md->buf) < 0) + return -1; + md->length += 8 * SHA512_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 (64 bytes) + @return CRYPT_OK if successful +*/ +int sha512_done(struct sha512_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 * CONST64(8); + + /* append the '1' bit */ + md->buf[md->curlen++] = (unsigned char) 0x80; + + /* if the length is currently above 112 bytes we append zeros + * then compress. Then we can fall back to padding zeros and length + * encoding like normal. + */ + if (md->curlen > 112) { + while (md->curlen < 128) { + md->buf[md->curlen++] = (unsigned char) 0; + } + sha512_compress(md, md->buf); + md->curlen = 0; + } + + /* pad up to 120 bytes of zeroes + * note: that from 112 to 120 is the 64 MSB of the length. We assume + * that you won't hash > 2^64 bits of data... :-) + */ + while (md->curlen < 120) { + md->buf[md->curlen++] = (unsigned char) 0; + } + + /* store length */ + WPA_PUT_BE64(md->buf + 120, md->length); + sha512_compress(md, md->buf); + + /* copy output */ + for (i = 0; i < 8; i++) + WPA_PUT_BE64(out + (8 * i), md->state[i]); + + return 0; +} + +/* ===== end - public domain SHA512 implementation ===== */