| /* |
| * Copyright (C) 2007 Michael Niedermayer <michaelni@gmx.at> |
| * Copyright (C) 2013 James Almer |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg 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 |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <string.h> |
| |
| #include "attributes.h" |
| #include "avutil.h" |
| #include "bswap.h" |
| #include "intreadwrite.h" |
| #include "ripemd.h" |
| #include "mem.h" |
| |
| /** hash context */ |
| typedef struct AVRIPEMD { |
| uint8_t digest_len; ///< digest length in 32-bit words |
| uint64_t count; ///< number of bytes in buffer |
| uint8_t buffer[64]; ///< 512-bit buffer of input values used in hash updating |
| uint32_t state[10]; ///< current hash value |
| /** function used to update hash for 512-bit input block */ |
| void (*transform)(uint32_t *state, const uint8_t buffer[64]); |
| } AVRIPEMD; |
| |
| const int av_ripemd_size = sizeof(AVRIPEMD); |
| |
| struct AVRIPEMD *av_ripemd_alloc(void) |
| { |
| return av_mallocz(sizeof(struct AVRIPEMD)); |
| } |
| |
| static const uint32_t KA[4] = { |
| 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xa953fd4e |
| }; |
| |
| static const uint32_t KB[4] = { |
| 0x50a28be6, 0x5c4dd124, 0x6d703ef3, 0x7a6d76e9 |
| }; |
| |
| static const int ROTA[80] = { |
| 11, 14, 15, 12, 5, 8, 7 , 9, 11, 13, 14, 15, 6, 7, 9, 8, |
| 7 , 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, |
| 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, |
| 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, |
| 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6 |
| }; |
| |
| static const int ROTB[80] = { |
| 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, |
| 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, |
| 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, |
| 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, |
| 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11 |
| }; |
| |
| static const int WA[80] = { |
| 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, |
| 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, |
| 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, |
| 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, |
| 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13 |
| }; |
| |
| static const int WB[80] = { |
| 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, |
| 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, |
| 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, |
| 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, |
| 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11 |
| }; |
| |
| #define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits)))) |
| |
| #define ROUND128_0_TO_15(a,b,c,d,e,f,g,h) \ |
| a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]); \ |
| e = rol(e + ((((f ^ g) & h) ^ g) + block[WB[n]] + KB[0]), ROTB[n]); \ |
| n++ |
| |
| #define ROUND128_16_TO_31(a,b,c,d,e,f,g,h) \ |
| a = rol(a + ((((c ^ d) & b) ^ d) + block[WA[n]] + KA[0]), ROTA[n]); \ |
| e = rol(e + (((~g | f) ^ h) + block[WB[n]] + KB[1]), ROTB[n]); \ |
| n++ |
| |
| #define ROUND128_32_TO_47(a,b,c,d,e,f,g,h) \ |
| a = rol(a + (((~c | b) ^ d) + block[WA[n]] + KA[1]), ROTA[n]); \ |
| e = rol(e + ((((g ^ h) & f) ^ h) + block[WB[n]] + KB[2]), ROTB[n]); \ |
| n++ |
| |
| #define ROUND128_48_TO_63(a,b,c,d,e,f,g,h) \ |
| a = rol(a + ((((b ^ c) & d) ^ c) + block[WA[n]] + KA[2]), ROTA[n]); \ |
| e = rol(e + (( f ^ g ^ h) + block[WB[n]]), ROTB[n]); \ |
| n++ |
| |
| #define R128_0 \ |
| ROUND128_0_TO_15(a,b,c,d,e,f,g,h); \ |
| ROUND128_0_TO_15(d,a,b,c,h,e,f,g); \ |
| ROUND128_0_TO_15(c,d,a,b,g,h,e,f); \ |
| ROUND128_0_TO_15(b,c,d,a,f,g,h,e) |
| |
| #define R128_16 \ |
| ROUND128_16_TO_31(a,b,c,d,e,f,g,h); \ |
| ROUND128_16_TO_31(d,a,b,c,h,e,f,g); \ |
| ROUND128_16_TO_31(c,d,a,b,g,h,e,f); \ |
| ROUND128_16_TO_31(b,c,d,a,f,g,h,e) |
| |
| #define R128_32 \ |
| ROUND128_32_TO_47(a,b,c,d,e,f,g,h); \ |
| ROUND128_32_TO_47(d,a,b,c,h,e,f,g); \ |
| ROUND128_32_TO_47(c,d,a,b,g,h,e,f); \ |
| ROUND128_32_TO_47(b,c,d,a,f,g,h,e) |
| |
| #define R128_48 \ |
| ROUND128_48_TO_63(a,b,c,d,e,f,g,h); \ |
| ROUND128_48_TO_63(d,a,b,c,h,e,f,g); \ |
| ROUND128_48_TO_63(c,d,a,b,g,h,e,f); \ |
| ROUND128_48_TO_63(b,c,d,a,f,g,h,e) |
| |
| static void ripemd128_transform(uint32_t *state, const uint8_t buffer[64]) |
| { |
| uint32_t a, b, c, d, e, f, g, h, av_unused t; |
| uint32_t block[16]; |
| int n; |
| |
| a = e = state[0]; |
| b = f = state[1]; |
| c = g = state[2]; |
| d = h = state[3]; |
| |
| for (n = 0; n < 16; n++) |
| block[n] = AV_RL32(buffer + 4 * n); |
| n = 0; |
| |
| #if CONFIG_SMALL |
| for (; n < 16;) { |
| ROUND128_0_TO_15(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| |
| for (; n < 32;) { |
| ROUND128_16_TO_31(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| |
| for (; n < 48;) { |
| ROUND128_32_TO_47(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| |
| for (; n < 64;) { |
| ROUND128_48_TO_63(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| #else |
| |
| R128_0; R128_0; R128_0; R128_0; |
| |
| R128_16; R128_16; R128_16; R128_16; |
| |
| R128_32; R128_32; R128_32; R128_32; |
| |
| R128_48; R128_48; R128_48; R128_48; |
| #endif |
| |
| h += c + state[1]; |
| state[1] = state[2] + d + e; |
| state[2] = state[3] + a + f; |
| state[3] = state[0] + b + g; |
| state[0] = h; |
| } |
| |
| static void ripemd256_transform(uint32_t *state, const uint8_t buffer[64]) |
| { |
| uint32_t a, b, c, d, e, f, g, h, av_unused t; |
| uint32_t block[16]; |
| int n; |
| |
| a = state[0]; b = state[1]; c = state[2]; d = state[3]; |
| e = state[4]; f = state[5]; g = state[6]; h = state[7]; |
| |
| for (n = 0; n < 16; n++) |
| block[n] = AV_RL32(buffer + 4 * n); |
| n = 0; |
| |
| #if CONFIG_SMALL |
| for (; n < 16;) { |
| ROUND128_0_TO_15(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| FFSWAP(uint32_t, a, e); |
| |
| for (; n < 32;) { |
| ROUND128_16_TO_31(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| FFSWAP(uint32_t, b, f); |
| |
| for (; n < 48;) { |
| ROUND128_32_TO_47(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| FFSWAP(uint32_t, c, g); |
| |
| for (; n < 64;) { |
| ROUND128_48_TO_63(a,b,c,d,e,f,g,h); |
| t = d; d = c; c = b; b = a; a = t; |
| t = h; h = g; g = f; f = e; e = t; |
| } |
| FFSWAP(uint32_t, d, h); |
| #else |
| |
| R128_0; R128_0; R128_0; R128_0; |
| FFSWAP(uint32_t, a, e); |
| |
| R128_16; R128_16; R128_16; R128_16; |
| FFSWAP(uint32_t, b, f); |
| |
| R128_32; R128_32; R128_32; R128_32; |
| FFSWAP(uint32_t, c, g); |
| |
| R128_48; R128_48; R128_48; R128_48; |
| FFSWAP(uint32_t, d, h); |
| #endif |
| |
| state[0] += a; state[1] += b; state[2] += c; state[3] += d; |
| state[4] += e; state[5] += f; state[6] += g; state[7] += h; |
| } |
| |
| #define ROTATE(x,y) \ |
| x = rol(x, 10); \ |
| y = rol(y, 10); \ |
| n++ |
| |
| #define ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j) \ |
| a = rol(a + (( b ^ c ^ d) + block[WA[n]]), ROTA[n]) + e; \ |
| f = rol(f + (((~i | h) ^ g) + block[WB[n]] + KB[0]), ROTB[n]) + j; \ |
| ROTATE(c,h) |
| |
| #define ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j) \ |
| a = rol(a + ((((c ^ d) & b) ^ d) + block[WA[n]] + KA[0]), ROTA[n]) + e; \ |
| f = rol(f + ((((g ^ h) & i) ^ h) + block[WB[n]] + KB[1]), ROTB[n]) + j; \ |
| ROTATE(c,h) |
| |
| #define ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j) \ |
| a = rol(a + (((~c | b) ^ d) + block[WA[n]] + KA[1]), ROTA[n]) + e; \ |
| f = rol(f + (((~h | g) ^ i) + block[WB[n]] + KB[2]), ROTB[n]) + j; \ |
| ROTATE(c,h) |
| |
| #define ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j) \ |
| a = rol(a + ((((b ^ c) & d) ^ c) + block[WA[n]] + KA[2]), ROTA[n]) + e; \ |
| f = rol(f + ((((h ^ i) & g) ^ i) + block[WB[n]] + KB[3]), ROTB[n]) + j; \ |
| ROTATE(c,h) |
| |
| #define ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j) \ |
| a = rol(a + (((~d | c) ^ b) + block[WA[n]] + KA[3]), ROTA[n]) + e; \ |
| f = rol(f + (( g ^ h ^ i) + block[WB[n]]), ROTB[n]) + j; \ |
| ROTATE(c,h) |
| |
| #define R160_0 \ |
| ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); \ |
| ROUND160_0_TO_15(e,a,b,c,d,j,f,g,h,i); \ |
| ROUND160_0_TO_15(d,e,a,b,c,i,j,f,g,h); \ |
| ROUND160_0_TO_15(c,d,e,a,b,h,i,j,f,g); \ |
| ROUND160_0_TO_15(b,c,d,e,a,g,h,i,j,f) |
| |
| #define R160_16 \ |
| ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i); \ |
| ROUND160_16_TO_31(d,e,a,b,c,i,j,f,g,h); \ |
| ROUND160_16_TO_31(c,d,e,a,b,h,i,j,f,g); \ |
| ROUND160_16_TO_31(b,c,d,e,a,g,h,i,j,f); \ |
| ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j) |
| |
| #define R160_32 \ |
| ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h); \ |
| ROUND160_32_TO_47(c,d,e,a,b,h,i,j,f,g); \ |
| ROUND160_32_TO_47(b,c,d,e,a,g,h,i,j,f); \ |
| ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j); \ |
| ROUND160_32_TO_47(e,a,b,c,d,j,f,g,h,i) |
| |
| #define R160_48 \ |
| ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g); \ |
| ROUND160_48_TO_63(b,c,d,e,a,g,h,i,j,f); \ |
| ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j); \ |
| ROUND160_48_TO_63(e,a,b,c,d,j,f,g,h,i); \ |
| ROUND160_48_TO_63(d,e,a,b,c,i,j,f,g,h) |
| |
| #define R160_64 \ |
| ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f); \ |
| ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j); \ |
| ROUND160_64_TO_79(e,a,b,c,d,j,f,g,h,i); \ |
| ROUND160_64_TO_79(d,e,a,b,c,i,j,f,g,h); \ |
| ROUND160_64_TO_79(c,d,e,a,b,h,i,j,f,g) |
| |
| static void ripemd160_transform(uint32_t *state, const uint8_t buffer[64]) |
| { |
| uint32_t a, b, c, d, e, f, g, h, i, j, av_unused t; |
| uint32_t block[16]; |
| int n; |
| |
| a = f = state[0]; |
| b = g = state[1]; |
| c = h = state[2]; |
| d = i = state[3]; |
| e = j = state[4]; |
| |
| for (n = 0; n < 16; n++) |
| block[n] = AV_RL32(buffer + 4 * n); |
| n = 0; |
| |
| #if CONFIG_SMALL |
| for (; n < 16;) { |
| ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| |
| for (; n < 32;) { |
| ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| |
| for (; n < 48;) { |
| ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| |
| for (; n < 64;) { |
| ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| |
| for (; n < 80;) { |
| ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| #else |
| |
| R160_0; R160_0; R160_0; |
| ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); |
| |
| R160_16; R160_16; R160_16; |
| ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i); |
| |
| R160_32; R160_32; R160_32; |
| ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h); |
| |
| R160_48; R160_48; R160_48; |
| ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g); |
| |
| R160_64; R160_64; R160_64; |
| ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f); |
| #endif |
| |
| i += c + state[1]; |
| state[1] = state[2] + d + j; |
| state[2] = state[3] + e + f; |
| state[3] = state[4] + a + g; |
| state[4] = state[0] + b + h; |
| state[0] = i; |
| } |
| |
| static void ripemd320_transform(uint32_t *state, const uint8_t buffer[64]) |
| { |
| uint32_t a, b, c, d, e, f, g, h, i, j, av_unused t; |
| uint32_t block[16]; |
| int n; |
| |
| a = state[0]; b = state[1]; c = state[2]; d = state[3]; e = state[4]; |
| f = state[5]; g = state[6]; h = state[7]; i = state[8]; j = state[9]; |
| |
| for (n = 0; n < 16; n++) |
| block[n] = AV_RL32(buffer + 4 * n); |
| n = 0; |
| |
| #if CONFIG_SMALL |
| for (; n < 16;) { |
| ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| FFSWAP(uint32_t, b, g); |
| |
| for (; n < 32;) { |
| ROUND160_16_TO_31(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| FFSWAP(uint32_t, d, i); |
| |
| for (; n < 48;) { |
| ROUND160_32_TO_47(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| FFSWAP(uint32_t, a, f); |
| |
| for (; n < 64;) { |
| ROUND160_48_TO_63(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| FFSWAP(uint32_t, c, h); |
| |
| for (; n < 80;) { |
| ROUND160_64_TO_79(a,b,c,d,e,f,g,h,i,j); |
| t = e; e = d; d = c; c = b; b = a; a = t; |
| t = j; j = i; i = h; h = g; g = f; f = t; |
| } |
| FFSWAP(uint32_t, e, j); |
| #else |
| |
| R160_0; R160_0; R160_0; |
| ROUND160_0_TO_15(a,b,c,d,e,f,g,h,i,j); |
| FFSWAP(uint32_t, a, f); |
| |
| R160_16; R160_16; R160_16; |
| ROUND160_16_TO_31(e,a,b,c,d,j,f,g,h,i); |
| FFSWAP(uint32_t, b, g); |
| |
| R160_32; R160_32; R160_32; |
| ROUND160_32_TO_47(d,e,a,b,c,i,j,f,g,h); |
| FFSWAP(uint32_t, c, h); |
| |
| R160_48; R160_48; R160_48; |
| ROUND160_48_TO_63(c,d,e,a,b,h,i,j,f,g); |
| FFSWAP(uint32_t, d, i); |
| |
| R160_64; R160_64; R160_64; |
| ROUND160_64_TO_79(b,c,d,e,a,g,h,i,j,f); |
| FFSWAP(uint32_t, e, j); |
| #endif |
| |
| state[0] += a; state[1] += b; state[2] += c; state[3] += d; state[4] += e; |
| state[5] += f; state[6] += g; state[7] += h; state[8] += i; state[9] += j; |
| } |
| |
| av_cold int av_ripemd_init(AVRIPEMD *ctx, int bits) |
| { |
| ctx->digest_len = bits >> 5; |
| switch (bits) { |
| case 128: // RIPEMD-128 |
| ctx->state[0] = 0x67452301; |
| ctx->state[1] = 0xEFCDAB89; |
| ctx->state[2] = 0x98BADCFE; |
| ctx->state[3] = 0x10325476; |
| ctx->transform = ripemd128_transform; |
| break; |
| case 160: // RIPEMD-160 |
| ctx->state[0] = 0x67452301; |
| ctx->state[1] = 0xEFCDAB89; |
| ctx->state[2] = 0x98BADCFE; |
| ctx->state[3] = 0x10325476; |
| ctx->state[4] = 0xC3D2E1F0; |
| ctx->transform = ripemd160_transform; |
| break; |
| case 256: // RIPEMD-256 |
| ctx->state[0] = 0x67452301; |
| ctx->state[1] = 0xEFCDAB89; |
| ctx->state[2] = 0x98BADCFE; |
| ctx->state[3] = 0x10325476; |
| ctx->state[4] = 0x76543210; |
| ctx->state[5] = 0xFEDCBA98; |
| ctx->state[6] = 0x89ABCDEF; |
| ctx->state[7] = 0x01234567; |
| ctx->transform = ripemd256_transform; |
| break; |
| case 320: // RIPEMD-320 |
| ctx->state[0] = 0x67452301; |
| ctx->state[1] = 0xEFCDAB89; |
| ctx->state[2] = 0x98BADCFE; |
| ctx->state[3] = 0x10325476; |
| ctx->state[4] = 0xC3D2E1F0; |
| ctx->state[5] = 0x76543210; |
| ctx->state[6] = 0xFEDCBA98; |
| ctx->state[7] = 0x89ABCDEF; |
| ctx->state[8] = 0x01234567; |
| ctx->state[9] = 0x3C2D1E0F; |
| ctx->transform = ripemd320_transform; |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| ctx->count = 0; |
| return 0; |
| } |
| |
| void av_ripemd_update(AVRIPEMD* ctx, const uint8_t* data, unsigned int len) |
| { |
| unsigned int i, j; |
| |
| j = ctx->count & 63; |
| ctx->count += len; |
| #if CONFIG_SMALL |
| for (i = 0; i < len; i++) { |
| ctx->buffer[j++] = data[i]; |
| if (64 == j) { |
| ctx->transform(ctx->state, ctx->buffer); |
| j = 0; |
| } |
| } |
| #else |
| if ((j + len) > 63) { |
| memcpy(&ctx->buffer[j], data, (i = 64 - j)); |
| ctx->transform(ctx->state, ctx->buffer); |
| for (; i + 63 < len; i += 64) |
| ctx->transform(ctx->state, &data[i]); |
| j = 0; |
| } else |
| i = 0; |
| memcpy(&ctx->buffer[j], &data[i], len - i); |
| #endif |
| } |
| |
| void av_ripemd_final(AVRIPEMD* ctx, uint8_t *digest) |
| { |
| int i; |
| uint64_t finalcount = av_le2ne64(ctx->count << 3); |
| |
| av_ripemd_update(ctx, "\200", 1); |
| while ((ctx->count & 63) != 56) |
| av_ripemd_update(ctx, "", 1); |
| av_ripemd_update(ctx, (uint8_t *)&finalcount, 8); /* Should cause a transform() */ |
| for (i = 0; i < ctx->digest_len; i++) |
| AV_WL32(digest + i*4, ctx->state[i]); |
| } |
