diff options
Diffstat (limited to 'cpukit/libmd/sha512c.c')
| -rw-r--r-- | cpukit/libmd/sha512c.c | 77 |
1 files changed, 64 insertions, 13 deletions
diff --git a/cpukit/libmd/sha512c.c b/cpukit/libmd/sha512c.c index a4f268045a..7d0e875550 100644 --- a/cpukit/libmd/sha512c.c +++ b/cpukit/libmd/sha512c.c @@ -33,6 +33,7 @@ __FBSDID("$FreeBSD$"); #include <string.h> #include "sha512.h" +#include "sha384.h" #if BYTE_ORDER == BIG_ENDIAN @@ -104,7 +105,7 @@ be64dec_vect(uint64_t *dst, const unsigned char *src, size_t len) * the 512-bit input block to produce a new state. */ static void -SHA512_Transform(uint64_t * state, const unsigned char block[128]) +SHA512_Transform(uint64_t * state, const unsigned char block[SHA512_BLOCK_LENGTH]) { uint64_t W[80]; uint64_t S[8]; @@ -112,12 +113,12 @@ SHA512_Transform(uint64_t * state, const unsigned char block[128]) int i; /* 1. Prepare message schedule W. */ - be64dec_vect(W, block, 128); + be64dec_vect(W, block, SHA512_BLOCK_LENGTH); for (i = 16; i < 80; i++) W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16]; /* 2. Initialize working variables. */ - memcpy(S, state, 64); + memcpy(S, state, SHA512_DIGEST_LENGTH); /* 3. Mix. */ RNDr(S, W, 0, 0x428a2f98d728ae22ULL); @@ -206,7 +207,7 @@ SHA512_Transform(uint64_t * state, const unsigned char block[128]) state[i] += S[i]; } -static const unsigned char PAD[128] = { +static const unsigned char PAD[SHA512_BLOCK_LENGTH] = { 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, @@ -279,22 +280,22 @@ SHA512_Update(SHA512_CTX * ctx, const void *in, size_t len) ctx->count[0] += bitlen[0]; /* Handle the case where we don't need to perform any transforms */ - if (len < 128 - r) { + if (len < SHA512_BLOCK_LENGTH - r) { memcpy(&ctx->buf[r], src, len); return; } /* Finish the current block */ - memcpy(&ctx->buf[r], src, 128 - r); + memcpy(&ctx->buf[r], src, SHA512_BLOCK_LENGTH - r); SHA512_Transform(ctx->state, ctx->buf); - src += 128 - r; - len -= 128 - r; + src += SHA512_BLOCK_LENGTH - r; + len -= SHA512_BLOCK_LENGTH - r; /* Perform complete blocks */ - while (len >= 128) { + while (len >= SHA512_BLOCK_LENGTH) { SHA512_Transform(ctx->state, src); - src += 128; - len -= 128; + src += SHA512_BLOCK_LENGTH; + len -= SHA512_BLOCK_LENGTH; } /* Copy left over data into buffer */ @@ -306,14 +307,64 @@ SHA512_Update(SHA512_CTX * ctx, const void *in, size_t len) * and clears the context state. */ void -SHA512_Final(unsigned char digest[64], SHA512_CTX * ctx) +SHA512_Final(unsigned char digest[SHA512_DIGEST_LENGTH], SHA512_CTX * ctx) { /* Add padding */ SHA512_Pad(ctx); /* Write the hash */ - be64enc_vect(digest, ctx->state, 64); + be64enc_vect(digest, ctx->state, SHA512_DIGEST_LENGTH); + + /* Clear the context state */ + memset((void *)ctx, 0, sizeof(*ctx)); +} + +/*** SHA-384: *********************************************************/ +/* + * the SHA384 and SHA512 transforms are identical, so SHA384 is skipped + */ + +/* SHA-384 initialization. Begins a SHA-384 operation. */ +void +SHA384_Init(SHA384_CTX * ctx) +{ + + /* Zero bits processed so far */ + ctx->count[0] = ctx->count[1] = 0; + + /* Magic initialization constants */ + ctx->state[0] = 0xcbbb9d5dc1059ed8ULL; + ctx->state[1] = 0x629a292a367cd507ULL; + ctx->state[2] = 0x9159015a3070dd17ULL; + ctx->state[3] = 0x152fecd8f70e5939ULL; + ctx->state[4] = 0x67332667ffc00b31ULL; + ctx->state[5] = 0x8eb44a8768581511ULL; + ctx->state[6] = 0xdb0c2e0d64f98fa7ULL; + ctx->state[7] = 0x47b5481dbefa4fa4ULL; +} + +/* Add bytes into the SHA-384 hash */ +void +SHA384_Update(SHA384_CTX * ctx, const void *in, size_t len) +{ + + SHA512_Update((SHA512_CTX *)ctx, in, len); +} + +/* + * SHA-384 finalization. Pads the input data, exports the hash value, + * and clears the context state. + */ +void +SHA384_Final(unsigned char digest[SHA384_DIGEST_LENGTH], SHA384_CTX * ctx) +{ + + /* Add padding */ + SHA512_Pad((SHA512_CTX *)ctx); + + /* Write the hash */ + be64enc_vect(digest, ctx->state, SHA384_DIGEST_LENGTH); /* Clear the context state */ memset((void *)ctx, 0, sizeof(*ctx)); |