X-Git-Url: https://git.distorted.org.uk/u/mdw/catacomb/blobdiff_plain/ba6e6b64033b1f9de49feccb5c9cd438354481f7..0f00dc4c8eb47e67bc0f148c2dd109f73a451e0a:/symm/rmd256.c diff --git a/symm/rmd256.c b/symm/rmd256.c new file mode 100644 index 0000000..99648f5 --- /dev/null +++ b/symm/rmd256.c @@ -0,0 +1,374 @@ +/* -*-c-*- + * + * The RIPEMD-256 message digest function + * + * (c) 1998 Straylight/Edgeware + */ + +/*----- Licensing notice --------------------------------------------------* + * + * This file is part of Catacomb. + * + * Catacomb is free software; you can redistribute it and/or modify + * it under the terms of the GNU Library General Public License as + * published by the Free Software Foundation; either version 2 of the + * License, or (at your option) any later version. + * + * Catacomb 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 Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with Catacomb; if not, write to the Free + * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, + * MA 02111-1307, USA. + */ + +/*----- Header files ------------------------------------------------------*/ + +#include + +#include "ghash.h" +#include "ghash-def.h" +#include "hash.h" +#include "rmd256.h" + +/*----- Main code ---------------------------------------------------------*/ + +/* --- @rmd256_compress@ --- * + * + * Arguments: @rmd256_ctx *ctx@ = pointer to context block + * @const void *sbuf@ = pointer to buffer of appropriate size + * + * Returns: --- + * + * Use: RIPEMD-256 compression function. + */ + +void rmd256_compress(rmd256_ctx *ctx, const void *sbuf) +{ + uint32 a, b, c, d; + uint32 A, B, C, D; + uint32 buf[16]; + + /* --- Fetch the chaining variables --- */ + + a = ctx->a; + b = ctx->b; + c = ctx->c; + d = ctx->d; + A = ctx->A; + B = ctx->B; + C = ctx->C; + D = ctx->D; + + /* --- Fetch the buffer contents --- */ + + { + int i; + const octet *p; + + for (i = 0, p = sbuf; i < 16; i++, p += 4) + buf[i] = LOAD32_L(p); + } + + /* --- Definitions for round functions --- */ + +#define F(x, y, z) ((x) ^ (y) ^ (z)) +#define G(x, y, z) (((x) & (y)) | (~(x) & (z))) +#define H(x, y, z) (((x) | ~(y)) ^ (z)) +#define I(x, y, z) (((x) & (z)) | ((y) & ~(z))) + +#define T(w, x, y, z, i, r, f, k) do { \ + uint32 _t = w + f(x, y, z) + buf[i] + k; \ + w = ROL32(_t, r); \ +} while (0) + +#define F1(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000) +#define G1(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x5a827999) +#define H1(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x6ed9eba1) +#define I1(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x8f1bbcdc) + +#define F2(w, x, y, z, i, r) T(w, x, y, z, i, r, I, 0x50a28be6) +#define G2(w, x, y, z, i, r) T(w, x, y, z, i, r, H, 0x5c4dd124) +#define H2(w, x, y, z, i, r) T(w, x, y, z, i, r, G, 0x6d703ef3) +#define I2(w, x, y, z, i, r) T(w, x, y, z, i, r, F, 0x00000000) + + /* --- We must do both sides together --- */ + + F1(a, b, c, d, 0, 11); + F1(d, a, b, c, 1, 14); + F1(c, d, a, b, 2, 15); + F1(b, c, d, a, 3, 12); + F1(a, b, c, d, 4, 5); + F1(d, a, b, c, 5, 8); + F1(c, d, a, b, 6, 7); + F1(b, c, d, a, 7, 9); + F1(a, b, c, d, 8, 11); + F1(d, a, b, c, 9, 13); + F1(c, d, a, b, 10, 14); + F1(b, c, d, a, 11, 15); + F1(a, b, c, d, 12, 6); + F1(d, a, b, c, 13, 7); + F1(c, d, a, b, 14, 9); + F1(b, c, d, a, 15, 8); + + F2(A, B, C, D, 5, 8); + F2(D, A, B, C, 14, 9); + F2(C, D, A, B, 7, 9); + F2(B, C, D, A, 0, 11); + F2(A, B, C, D, 9, 13); + F2(D, A, B, C, 2, 15); + F2(C, D, A, B, 11, 15); + F2(B, C, D, A, 4, 5); + F2(A, B, C, D, 13, 7); + F2(D, A, B, C, 6, 7); + F2(C, D, A, B, 15, 8); + F2(B, C, D, A, 8, 11); + F2(A, B, C, D, 1, 14); + F2(D, A, B, C, 10, 14); + F2(C, D, A, B, 3, 12); + F2(B, C, D, A, 12, 6); + + G1(A, b, c, d, 7, 7); + G1(d, A, b, c, 4, 6); + G1(c, d, A, b, 13, 8); + G1(b, c, d, A, 1, 13); + G1(A, b, c, d, 10, 11); + G1(d, A, b, c, 6, 9); + G1(c, d, A, b, 15, 7); + G1(b, c, d, A, 3, 15); + G1(A, b, c, d, 12, 7); + G1(d, A, b, c, 0, 12); + G1(c, d, A, b, 9, 15); + G1(b, c, d, A, 5, 9); + G1(A, b, c, d, 2, 11); + G1(d, A, b, c, 14, 7); + G1(c, d, A, b, 11, 13); + G1(b, c, d, A, 8, 12); + + G2(a, B, C, D, 6, 9); + G2(D, a, B, C, 11, 13); + G2(C, D, a, B, 3, 15); + G2(B, C, D, a, 7, 7); + G2(a, B, C, D, 0, 12); + G2(D, a, B, C, 13, 8); + G2(C, D, a, B, 5, 9); + G2(B, C, D, a, 10, 11); + G2(a, B, C, D, 14, 7); + G2(D, a, B, C, 15, 7); + G2(C, D, a, B, 8, 12); + G2(B, C, D, a, 12, 7); + G2(a, B, C, D, 4, 6); + G2(D, a, B, C, 9, 15); + G2(C, D, a, B, 1, 13); + G2(B, C, D, a, 2, 11); + + H1(A, B, c, d, 3, 11); + H1(d, A, B, c, 10, 13); + H1(c, d, A, B, 14, 6); + H1(B, c, d, A, 4, 7); + H1(A, B, c, d, 9, 14); + H1(d, A, B, c, 15, 9); + H1(c, d, A, B, 8, 13); + H1(B, c, d, A, 1, 15); + H1(A, B, c, d, 2, 14); + H1(d, A, B, c, 7, 8); + H1(c, d, A, B, 0, 13); + H1(B, c, d, A, 6, 6); + H1(A, B, c, d, 13, 5); + H1(d, A, B, c, 11, 12); + H1(c, d, A, B, 5, 7); + H1(B, c, d, A, 12, 5); + + H2(a, b, C, D, 15, 9); + H2(D, a, b, C, 5, 7); + H2(C, D, a, b, 1, 15); + H2(b, C, D, a, 3, 11); + H2(a, b, C, D, 7, 8); + H2(D, a, b, C, 14, 6); + H2(C, D, a, b, 6, 6); + H2(b, C, D, a, 9, 14); + H2(a, b, C, D, 11, 12); + H2(D, a, b, C, 8, 13); + H2(C, D, a, b, 12, 5); + H2(b, C, D, a, 2, 14); + H2(a, b, C, D, 10, 13); + H2(D, a, b, C, 0, 13); + H2(C, D, a, b, 4, 7); + H2(b, C, D, a, 13, 5); + + I1(A, B, C, d, 1, 11); + I1(d, A, B, C, 9, 12); + I1(C, d, A, B, 11, 14); + I1(B, C, d, A, 10, 15); + I1(A, B, C, d, 0, 14); + I1(d, A, B, C, 8, 15); + I1(C, d, A, B, 12, 9); + I1(B, C, d, A, 4, 8); + I1(A, B, C, d, 13, 9); + I1(d, A, B, C, 3, 14); + I1(C, d, A, B, 7, 5); + I1(B, C, d, A, 15, 6); + I1(A, B, C, d, 14, 8); + I1(d, A, B, C, 5, 6); + I1(C, d, A, B, 6, 5); + I1(B, C, d, A, 2, 12); + + I2(a, b, c, D, 8, 15); + I2(D, a, b, c, 6, 5); + I2(c, D, a, b, 4, 8); + I2(b, c, D, a, 1, 11); + I2(a, b, c, D, 3, 14); + I2(D, a, b, c, 11, 14); + I2(c, D, a, b, 15, 6); + I2(b, c, D, a, 0, 14); + I2(a, b, c, D, 5, 6); + I2(D, a, b, c, 12, 9); + I2(c, D, a, b, 2, 12); + I2(b, c, D, a, 13, 9); + I2(a, b, c, D, 9, 12); + I2(D, a, b, c, 7, 5); + I2(c, D, a, b, 10, 15); + I2(b, c, D, a, 14, 8); + + /* --- Recombine the two halves --- */ + + ctx->a += A; + ctx->b += B; + ctx->c += C; + ctx->d += D; + ctx->A += a; + ctx->B += b; + ctx->C += c; + ctx->D += d; +} + +/* --- @rmd256_init@ --- * + * + * Arguments: @rmd256_ctx *ctx@ = pointer to context block to initialize + * + * Returns: --- + * + * Use: Initializes a context block ready for hashing. + */ + +void rmd256_init(rmd256_ctx *ctx) +{ + ctx->a = 0x67452301; + ctx->b = 0xefcdab89; + ctx->c = 0x98badcfe; + ctx->d = 0x10325476; + ctx->A = 0x76543210; + ctx->B = 0xfedcba98; + ctx->C = 0x89abcdef; + ctx->D = 0x01234567; + ctx->off = 0; + ctx->nl = ctx->nh = 0; +} + +/* --- @rmd256_set@ --- * + * + * Arguments: @rmd256_ctx *ctx@ = pointer to context block + * @const void *buf@ = pointer to state buffer + * @unsigned long count@ = current count of bytes processed + * + * Returns: --- + * + * Use: Initializes a context block from a given state. This is + * useful in cases where the initial hash state is meant to be + * secret, e.g., for NMAC and HMAC support. + */ + +void rmd256_set(rmd256_ctx *ctx, const void *buf, unsigned long count) +{ + const octet *p = buf; + ctx->a = LOAD32_L(p + 0); + ctx->b = LOAD32_L(p + 4); + ctx->c = LOAD32_L(p + 8); + ctx->d = LOAD32_L(p + 12); + ctx->A = LOAD32_L(p + 16); + ctx->B = LOAD32_L(p + 20); + ctx->C = LOAD32_L(p + 24); + ctx->D = LOAD32_L(p + 28); + ctx->off = 0; + ctx->nl = U32(count); + ctx->nh = U32(((count & ~MASK32) >> 16) >> 16); +} + +/* --- @rmd256_hash@ --- * + * + * Arguments: @rmd256_ctx *ctx@ = pointer to context block + * @const void *buf@ = buffer of data to hash + * @size_t sz@ = size of buffer to hash + * + * Returns: --- + * + * Use: Hashes a buffer of data. The buffer may be of any size and + * alignment. + */ + +void rmd256_hash(rmd256_ctx *ctx, const void *buf, size_t sz) +{ + HASH_BUFFER(RMD256, rmd256, ctx, buf, sz); +} + +/* --- @rmd256_done@ --- * + * + * Arguments: @rmd256_ctx *ctx@ = pointer to context block + * @void *hash@ = pointer to output buffer + * + * Returns: --- + * + * Use: Returns the hash of the data read so far. + */ + +void rmd256_done(rmd256_ctx *ctx, void *hash) +{ + octet *p = hash; + HASH_MD5STRENGTH(RMD256, rmd256, ctx); + STORE32_L(p + 0, ctx->a); + STORE32_L(p + 4, ctx->b); + STORE32_L(p + 8, ctx->c); + STORE32_L(p + 12, ctx->d); + STORE32_L(p + 16, ctx->A); + STORE32_L(p + 20, ctx->B); + STORE32_L(p + 24, ctx->C); + STORE32_L(p + 28, ctx->D); +} + +/* --- @rmd256_state@ --- * + * + * Arguments: @rmd256_ctx *ctx@ = pointer to context + * @void *state@ = pointer to buffer for current state + * + * Returns: Number of bytes written to the hash function so far. + * + * Use: Returns the current state of the hash function such that + * it can be passed to @rmd256_set@. + */ + +unsigned long rmd256_state(rmd256_ctx *ctx, void *state) +{ + octet *p = state; + STORE32_L(p + 0, ctx->a); + STORE32_L(p + 4, ctx->b); + STORE32_L(p + 8, ctx->c); + STORE32_L(p + 12, ctx->d); + STORE32_L(p + 16, ctx->A); + STORE32_L(p + 20, ctx->B); + STORE32_L(p + 24, ctx->C); + STORE32_L(p + 28, ctx->D); + return (ctx->nl | ((ctx->nh << 16) << 16)); +} + +/* --- Generic interface --- */ + +GHASH_DEF(RMD256, rmd256) + +/* --- Test code --- */ + +HASH_TEST(RMD256, rmd256) + +/*----- That's all, folks -------------------------------------------------*/