1238104Sdes/* 2238104Sdes * FILE: sha2.c 3238104Sdes * AUTHOR: Aaron D. Gifford - http://www.aarongifford.com/ 4238104Sdes * 5238104Sdes * Copyright (c) 2000-2001, Aaron D. Gifford 6238104Sdes * All rights reserved. 7238104Sdes * 8238104Sdes * Modified by Jelte Jansen to fit in ldns, and not clash with any 9238104Sdes * system-defined SHA code. 10238104Sdes * Changes: 11238104Sdes * - Renamed (external) functions and constants to fit ldns style 12238104Sdes * - Removed _End and _Data functions 13238104Sdes * - Added ldns_shaX(data, len, digest) convenience functions 14238104Sdes * - Removed prototypes of _Transform functions and made those static 15238104Sdes * 16238104Sdes * Redistribution and use in source and binary forms, with or without 17238104Sdes * modification, are permitted provided that the following conditions 18238104Sdes * are met: 19238104Sdes * 1. Redistributions of source code must retain the above copyright 20238104Sdes * notice, this list of conditions and the following disclaimer. 21238104Sdes * 2. Redistributions in binary form must reproduce the above copyright 22238104Sdes * notice, this list of conditions and the following disclaimer in the 23238104Sdes * documentation and/or other materials provided with the distribution. 24238104Sdes * 3. Neither the name of the copyright holder nor the names of contributors 25238104Sdes * may be used to endorse or promote products derived from this software 26238104Sdes * without specific prior written permission. 27238104Sdes * 28238104Sdes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND 29238104Sdes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30238104Sdes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31238104Sdes * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE 32238104Sdes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33238104Sdes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34238104Sdes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35238104Sdes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36238104Sdes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37238104Sdes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38238104Sdes * SUCH DAMAGE. 39238104Sdes * 40238104Sdes * $Id: sha2.c,v 1.1 2001/11/08 00:01:51 adg Exp adg $ 41238104Sdes */ 42238104Sdes 43238104Sdes#include <ldns/config.h> 44238104Sdes#include <string.h> /* memcpy()/memset() or bcopy()/bzero() */ 45238104Sdes#include <assert.h> /* assert() */ 46238104Sdes#include <ldns/sha2.h> 47238104Sdes 48238104Sdes/* 49238104Sdes * ASSERT NOTE: 50238104Sdes * Some sanity checking code is included using assert(). On my FreeBSD 51238104Sdes * system, this additional code can be removed by compiling with NDEBUG 52238104Sdes * defined. Check your own systems manpage on assert() to see how to 53238104Sdes * compile WITHOUT the sanity checking code on your system. 54238104Sdes * 55238104Sdes * UNROLLED TRANSFORM LOOP NOTE: 56238104Sdes * You can define SHA2_UNROLL_TRANSFORM to use the unrolled transform 57238104Sdes * loop version for the hash transform rounds (defined using macros 58238104Sdes * later in this file). Either define on the command line, for example: 59238104Sdes * 60238104Sdes * cc -DSHA2_UNROLL_TRANSFORM -o sha2 sha2.c sha2prog.c 61238104Sdes * 62238104Sdes * or define below: 63238104Sdes * 64238104Sdes * #define SHA2_UNROLL_TRANSFORM 65238104Sdes * 66238104Sdes */ 67238104Sdes 68238104Sdes 69238104Sdes/*** SHA-256/384/512 Machine Architecture Definitions *****************/ 70238104Sdes/* 71238104Sdes * BYTE_ORDER NOTE: 72238104Sdes * 73238104Sdes * Please make sure that your system defines BYTE_ORDER. If your 74238104Sdes * architecture is little-endian, make sure it also defines 75238104Sdes * LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are 76238104Sdes * equivilent. 77238104Sdes * 78238104Sdes * If your system does not define the above, then you can do so by 79238104Sdes * hand like this: 80238104Sdes * 81238104Sdes * #define LITTLE_ENDIAN 1234 82238104Sdes * #define BIG_ENDIAN 4321 83238104Sdes * 84238104Sdes * And for little-endian machines, add: 85238104Sdes * 86238104Sdes * #define BYTE_ORDER LITTLE_ENDIAN 87238104Sdes * 88238104Sdes * Or for big-endian machines: 89238104Sdes * 90238104Sdes * #define BYTE_ORDER BIG_ENDIAN 91238104Sdes * 92238104Sdes * The FreeBSD machine this was written on defines BYTE_ORDER 93238104Sdes * appropriately by including <sys/types.h> (which in turn includes 94238104Sdes * <machine/endian.h> where the appropriate definitions are actually 95238104Sdes * made). 96238104Sdes */ 97238104Sdes#if !defined(BYTE_ORDER) || (BYTE_ORDER != LITTLE_ENDIAN && BYTE_ORDER != BIG_ENDIAN) 98238104Sdes#error Define BYTE_ORDER to be equal to either LITTLE_ENDIAN or BIG_ENDIAN 99238104Sdes#endif 100238104Sdes 101238104Sdestypedef uint8_t sha2_byte; /* Exactly 1 byte */ 102238104Sdestypedef uint32_t sha2_word32; /* Exactly 4 bytes */ 103238104Sdes#ifdef S_SPLINT_S 104238104Sdestypedef unsigned long long sha2_word64; /* lint 8 bytes */ 105238104Sdes#else 106238104Sdestypedef uint64_t sha2_word64; /* Exactly 8 bytes */ 107238104Sdes#endif 108238104Sdes 109238104Sdes/*** SHA-256/384/512 Various Length Definitions ***********************/ 110238104Sdes/* NOTE: Most of these are in sha2.h */ 111238104Sdes#define ldns_sha256_SHORT_BLOCK_LENGTH (LDNS_SHA256_BLOCK_LENGTH - 8) 112238104Sdes#define ldns_sha384_SHORT_BLOCK_LENGTH (LDNS_SHA384_BLOCK_LENGTH - 16) 113238104Sdes#define ldns_sha512_SHORT_BLOCK_LENGTH (LDNS_SHA512_BLOCK_LENGTH - 16) 114238104Sdes 115238104Sdes 116238104Sdes/*** ENDIAN REVERSAL MACROS *******************************************/ 117238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 118238104Sdes#define REVERSE32(w,x) { \ 119238104Sdes sha2_word32 tmp = (w); \ 120238104Sdes tmp = (tmp >> 16) | (tmp << 16); \ 121238104Sdes (x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \ 122238104Sdes} 123238104Sdes#ifndef S_SPLINT_S 124238104Sdes#define REVERSE64(w,x) { \ 125238104Sdes sha2_word64 tmp = (w); \ 126238104Sdes tmp = (tmp >> 32) | (tmp << 32); \ 127238104Sdes tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \ 128238104Sdes ((tmp & 0x00ff00ff00ff00ffULL) << 8); \ 129238104Sdes (x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \ 130238104Sdes ((tmp & 0x0000ffff0000ffffULL) << 16); \ 131238104Sdes} 132238104Sdes#else /* splint */ 133238104Sdes#define REVERSE64(w,x) /* splint */ 134238104Sdes#endif /* splint */ 135238104Sdes#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 136238104Sdes 137238104Sdes/* 138238104Sdes * Macro for incrementally adding the unsigned 64-bit integer n to the 139238104Sdes * unsigned 128-bit integer (represented using a two-element array of 140238104Sdes * 64-bit words): 141238104Sdes */ 142238104Sdes#define ADDINC128(w,n) { \ 143238104Sdes (w)[0] += (sha2_word64)(n); \ 144238104Sdes if ((w)[0] < (n)) { \ 145238104Sdes (w)[1]++; \ 146238104Sdes } \ 147238104Sdes} 148238104Sdes#ifdef S_SPLINT_S 149238104Sdes#undef ADDINC128 150238104Sdes#define ADDINC128(w,n) /* splint */ 151238104Sdes#endif 152238104Sdes 153238104Sdes/* 154238104Sdes * Macros for copying blocks of memory and for zeroing out ranges 155238104Sdes * of memory. Using these macros makes it easy to switch from 156238104Sdes * using memset()/memcpy() and using bzero()/bcopy(). 157238104Sdes * 158238104Sdes * Please define either SHA2_USE_MEMSET_MEMCPY or define 159238104Sdes * SHA2_USE_BZERO_BCOPY depending on which function set you 160238104Sdes * choose to use: 161238104Sdes */ 162238104Sdes#if !defined(SHA2_USE_MEMSET_MEMCPY) && !defined(SHA2_USE_BZERO_BCOPY) 163238104Sdes/* Default to memset()/memcpy() if no option is specified */ 164238104Sdes#define SHA2_USE_MEMSET_MEMCPY 1 165238104Sdes#endif 166238104Sdes#if defined(SHA2_USE_MEMSET_MEMCPY) && defined(SHA2_USE_BZERO_BCOPY) 167238104Sdes/* Abort with an error if BOTH options are defined */ 168238104Sdes#error Define either SHA2_USE_MEMSET_MEMCPY or SHA2_USE_BZERO_BCOPY, not both! 169238104Sdes#endif 170238104Sdes 171238104Sdes#ifdef SHA2_USE_MEMSET_MEMCPY 172238104Sdes#define MEMSET_BZERO(p,l) memset((p), 0, (l)) 173238104Sdes#define MEMCPY_BCOPY(d,s,l) memcpy((d), (s), (l)) 174238104Sdes#endif 175238104Sdes#ifdef SHA2_USE_BZERO_BCOPY 176238104Sdes#define MEMSET_BZERO(p,l) bzero((p), (l)) 177238104Sdes#define MEMCPY_BCOPY(d,s,l) bcopy((s), (d), (l)) 178238104Sdes#endif 179238104Sdes 180238104Sdes 181238104Sdes/*** THE SIX LOGICAL FUNCTIONS ****************************************/ 182238104Sdes/* 183238104Sdes * Bit shifting and rotation (used by the six SHA-XYZ logical functions: 184238104Sdes * 185238104Sdes * NOTE: The naming of R and S appears backwards here (R is a SHIFT and 186238104Sdes * S is a ROTATION) because the SHA-256/384/512 description document 187238104Sdes * (see http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf) uses this 188238104Sdes * same "backwards" definition. 189238104Sdes */ 190238104Sdes/* Shift-right (used in SHA-256, SHA-384, and SHA-512): */ 191238104Sdes#define R(b,x) ((x) >> (b)) 192238104Sdes/* 32-bit Rotate-right (used in SHA-256): */ 193238104Sdes#define S32(b,x) (((x) >> (b)) | ((x) << (32 - (b)))) 194238104Sdes/* 64-bit Rotate-right (used in SHA-384 and SHA-512): */ 195238104Sdes#define S64(b,x) (((x) >> (b)) | ((x) << (64 - (b)))) 196238104Sdes 197238104Sdes/* Two of six logical functions used in SHA-256, SHA-384, and SHA-512: */ 198238104Sdes#define Ch(x,y,z) (((x) & (y)) ^ ((~(x)) & (z))) 199238104Sdes#define Maj(x,y,z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z))) 200238104Sdes 201238104Sdes/* Four of six logical functions used in SHA-256: */ 202238104Sdes#define Sigma0_256(x) (S32(2, (x)) ^ S32(13, (x)) ^ S32(22, (x))) 203238104Sdes#define Sigma1_256(x) (S32(6, (x)) ^ S32(11, (x)) ^ S32(25, (x))) 204238104Sdes#define sigma0_256(x) (S32(7, (x)) ^ S32(18, (x)) ^ R(3 , (x))) 205238104Sdes#define sigma1_256(x) (S32(17, (x)) ^ S32(19, (x)) ^ R(10, (x))) 206238104Sdes 207238104Sdes/* Four of six logical functions used in SHA-384 and SHA-512: */ 208238104Sdes#define Sigma0_512(x) (S64(28, (x)) ^ S64(34, (x)) ^ S64(39, (x))) 209238104Sdes#define Sigma1_512(x) (S64(14, (x)) ^ S64(18, (x)) ^ S64(41, (x))) 210238104Sdes#define sigma0_512(x) (S64( 1, (x)) ^ S64( 8, (x)) ^ R( 7, (x))) 211238104Sdes#define sigma1_512(x) (S64(19, (x)) ^ S64(61, (x)) ^ R( 6, (x))) 212238104Sdes 213238104Sdes/*** SHA-XYZ INITIAL HASH VALUES AND CONSTANTS ************************/ 214238104Sdes/* Hash constant words K for SHA-256: */ 215238104Sdesstatic const sha2_word32 K256[64] = { 216238104Sdes 0x428a2f98UL, 0x71374491UL, 0xb5c0fbcfUL, 0xe9b5dba5UL, 217238104Sdes 0x3956c25bUL, 0x59f111f1UL, 0x923f82a4UL, 0xab1c5ed5UL, 218238104Sdes 0xd807aa98UL, 0x12835b01UL, 0x243185beUL, 0x550c7dc3UL, 219238104Sdes 0x72be5d74UL, 0x80deb1feUL, 0x9bdc06a7UL, 0xc19bf174UL, 220238104Sdes 0xe49b69c1UL, 0xefbe4786UL, 0x0fc19dc6UL, 0x240ca1ccUL, 221238104Sdes 0x2de92c6fUL, 0x4a7484aaUL, 0x5cb0a9dcUL, 0x76f988daUL, 222238104Sdes 0x983e5152UL, 0xa831c66dUL, 0xb00327c8UL, 0xbf597fc7UL, 223238104Sdes 0xc6e00bf3UL, 0xd5a79147UL, 0x06ca6351UL, 0x14292967UL, 224238104Sdes 0x27b70a85UL, 0x2e1b2138UL, 0x4d2c6dfcUL, 0x53380d13UL, 225238104Sdes 0x650a7354UL, 0x766a0abbUL, 0x81c2c92eUL, 0x92722c85UL, 226238104Sdes 0xa2bfe8a1UL, 0xa81a664bUL, 0xc24b8b70UL, 0xc76c51a3UL, 227238104Sdes 0xd192e819UL, 0xd6990624UL, 0xf40e3585UL, 0x106aa070UL, 228238104Sdes 0x19a4c116UL, 0x1e376c08UL, 0x2748774cUL, 0x34b0bcb5UL, 229238104Sdes 0x391c0cb3UL, 0x4ed8aa4aUL, 0x5b9cca4fUL, 0x682e6ff3UL, 230238104Sdes 0x748f82eeUL, 0x78a5636fUL, 0x84c87814UL, 0x8cc70208UL, 231238104Sdes 0x90befffaUL, 0xa4506cebUL, 0xbef9a3f7UL, 0xc67178f2UL 232238104Sdes}; 233238104Sdes 234238104Sdes/* initial hash value H for SHA-256: */ 235238104Sdesstatic const sha2_word32 ldns_sha256_initial_hash_value[8] = { 236238104Sdes 0x6a09e667UL, 237238104Sdes 0xbb67ae85UL, 238238104Sdes 0x3c6ef372UL, 239238104Sdes 0xa54ff53aUL, 240238104Sdes 0x510e527fUL, 241238104Sdes 0x9b05688cUL, 242238104Sdes 0x1f83d9abUL, 243238104Sdes 0x5be0cd19UL 244238104Sdes}; 245238104Sdes 246238104Sdes/* Hash constant words K for SHA-384 and SHA-512: */ 247238104Sdesstatic const sha2_word64 K512[80] = { 248238104Sdes 0x428a2f98d728ae22ULL, 0x7137449123ef65cdULL, 249238104Sdes 0xb5c0fbcfec4d3b2fULL, 0xe9b5dba58189dbbcULL, 250238104Sdes 0x3956c25bf348b538ULL, 0x59f111f1b605d019ULL, 251238104Sdes 0x923f82a4af194f9bULL, 0xab1c5ed5da6d8118ULL, 252238104Sdes 0xd807aa98a3030242ULL, 0x12835b0145706fbeULL, 253238104Sdes 0x243185be4ee4b28cULL, 0x550c7dc3d5ffb4e2ULL, 254238104Sdes 0x72be5d74f27b896fULL, 0x80deb1fe3b1696b1ULL, 255238104Sdes 0x9bdc06a725c71235ULL, 0xc19bf174cf692694ULL, 256238104Sdes 0xe49b69c19ef14ad2ULL, 0xefbe4786384f25e3ULL, 257238104Sdes 0x0fc19dc68b8cd5b5ULL, 0x240ca1cc77ac9c65ULL, 258238104Sdes 0x2de92c6f592b0275ULL, 0x4a7484aa6ea6e483ULL, 259238104Sdes 0x5cb0a9dcbd41fbd4ULL, 0x76f988da831153b5ULL, 260238104Sdes 0x983e5152ee66dfabULL, 0xa831c66d2db43210ULL, 261238104Sdes 0xb00327c898fb213fULL, 0xbf597fc7beef0ee4ULL, 262238104Sdes 0xc6e00bf33da88fc2ULL, 0xd5a79147930aa725ULL, 263238104Sdes 0x06ca6351e003826fULL, 0x142929670a0e6e70ULL, 264238104Sdes 0x27b70a8546d22ffcULL, 0x2e1b21385c26c926ULL, 265238104Sdes 0x4d2c6dfc5ac42aedULL, 0x53380d139d95b3dfULL, 266238104Sdes 0x650a73548baf63deULL, 0x766a0abb3c77b2a8ULL, 267238104Sdes 0x81c2c92e47edaee6ULL, 0x92722c851482353bULL, 268238104Sdes 0xa2bfe8a14cf10364ULL, 0xa81a664bbc423001ULL, 269238104Sdes 0xc24b8b70d0f89791ULL, 0xc76c51a30654be30ULL, 270238104Sdes 0xd192e819d6ef5218ULL, 0xd69906245565a910ULL, 271238104Sdes 0xf40e35855771202aULL, 0x106aa07032bbd1b8ULL, 272238104Sdes 0x19a4c116b8d2d0c8ULL, 0x1e376c085141ab53ULL, 273238104Sdes 0x2748774cdf8eeb99ULL, 0x34b0bcb5e19b48a8ULL, 274238104Sdes 0x391c0cb3c5c95a63ULL, 0x4ed8aa4ae3418acbULL, 275238104Sdes 0x5b9cca4f7763e373ULL, 0x682e6ff3d6b2b8a3ULL, 276238104Sdes 0x748f82ee5defb2fcULL, 0x78a5636f43172f60ULL, 277238104Sdes 0x84c87814a1f0ab72ULL, 0x8cc702081a6439ecULL, 278238104Sdes 0x90befffa23631e28ULL, 0xa4506cebde82bde9ULL, 279238104Sdes 0xbef9a3f7b2c67915ULL, 0xc67178f2e372532bULL, 280238104Sdes 0xca273eceea26619cULL, 0xd186b8c721c0c207ULL, 281238104Sdes 0xeada7dd6cde0eb1eULL, 0xf57d4f7fee6ed178ULL, 282238104Sdes 0x06f067aa72176fbaULL, 0x0a637dc5a2c898a6ULL, 283238104Sdes 0x113f9804bef90daeULL, 0x1b710b35131c471bULL, 284238104Sdes 0x28db77f523047d84ULL, 0x32caab7b40c72493ULL, 285238104Sdes 0x3c9ebe0a15c9bebcULL, 0x431d67c49c100d4cULL, 286238104Sdes 0x4cc5d4becb3e42b6ULL, 0x597f299cfc657e2aULL, 287238104Sdes 0x5fcb6fab3ad6faecULL, 0x6c44198c4a475817ULL 288238104Sdes}; 289238104Sdes 290238104Sdes/* initial hash value H for SHA-384 */ 291238104Sdesstatic const sha2_word64 sha384_initial_hash_value[8] = { 292238104Sdes 0xcbbb9d5dc1059ed8ULL, 293238104Sdes 0x629a292a367cd507ULL, 294238104Sdes 0x9159015a3070dd17ULL, 295238104Sdes 0x152fecd8f70e5939ULL, 296238104Sdes 0x67332667ffc00b31ULL, 297238104Sdes 0x8eb44a8768581511ULL, 298238104Sdes 0xdb0c2e0d64f98fa7ULL, 299238104Sdes 0x47b5481dbefa4fa4ULL 300238104Sdes}; 301238104Sdes 302238104Sdes/* initial hash value H for SHA-512 */ 303238104Sdesstatic const sha2_word64 sha512_initial_hash_value[8] = { 304238104Sdes 0x6a09e667f3bcc908ULL, 305238104Sdes 0xbb67ae8584caa73bULL, 306238104Sdes 0x3c6ef372fe94f82bULL, 307238104Sdes 0xa54ff53a5f1d36f1ULL, 308238104Sdes 0x510e527fade682d1ULL, 309238104Sdes 0x9b05688c2b3e6c1fULL, 310238104Sdes 0x1f83d9abfb41bd6bULL, 311238104Sdes 0x5be0cd19137e2179ULL 312238104Sdes}; 313238104Sdes 314238104Sdes/*** SHA-256: *********************************************************/ 315238104Sdesvoid ldns_sha256_init(ldns_sha256_CTX* context) { 316238104Sdes if (context == (ldns_sha256_CTX*)0) { 317238104Sdes return; 318238104Sdes } 319238104Sdes MEMCPY_BCOPY(context->state, ldns_sha256_initial_hash_value, LDNS_SHA256_DIGEST_LENGTH); 320238104Sdes MEMSET_BZERO(context->buffer, LDNS_SHA256_BLOCK_LENGTH); 321238104Sdes context->bitcount = 0; 322238104Sdes} 323238104Sdes 324238104Sdes#ifdef SHA2_UNROLL_TRANSFORM 325238104Sdes 326238104Sdes/* Unrolled SHA-256 round macros: */ 327238104Sdes 328238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 329238104Sdes 330238104Sdes#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \ 331238104Sdes REVERSE32(*data++, W256[j]); \ 332238104Sdes T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \ 333238104Sdes K256[j] + W256[j]; \ 334238104Sdes (d) += T1; \ 335238104Sdes (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 336238104Sdes j++ 337238104Sdes 338238104Sdes 339238104Sdes#else /* BYTE_ORDER == LITTLE_ENDIAN */ 340238104Sdes 341238104Sdes#define ROUND256_0_TO_15(a,b,c,d,e,f,g,h) \ 342238104Sdes T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + \ 343238104Sdes K256[j] + (W256[j] = *data++); \ 344238104Sdes (d) += T1; \ 345238104Sdes (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 346238104Sdes j++ 347238104Sdes 348238104Sdes#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 349238104Sdes 350238104Sdes#define ROUND256(a,b,c,d,e,f,g,h) \ 351238104Sdes s0 = W256[(j+1)&0x0f]; \ 352238104Sdes s0 = sigma0_256(s0); \ 353238104Sdes s1 = W256[(j+14)&0x0f]; \ 354238104Sdes s1 = sigma1_256(s1); \ 355238104Sdes T1 = (h) + Sigma1_256(e) + Ch((e), (f), (g)) + K256[j] + \ 356238104Sdes (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); \ 357238104Sdes (d) += T1; \ 358238104Sdes (h) = T1 + Sigma0_256(a) + Maj((a), (b), (c)); \ 359238104Sdes j++ 360238104Sdes 361238104Sdesstatic void ldns_sha256_Transform(ldns_sha256_CTX* context, 362238104Sdes const sha2_word32* data) { 363238104Sdes sha2_word32 a, b, c, d, e, f, g, h, s0, s1; 364238104Sdes sha2_word32 T1, *W256; 365238104Sdes int j; 366238104Sdes 367238104Sdes W256 = (sha2_word32*)context->buffer; 368238104Sdes 369238104Sdes /* initialize registers with the prev. intermediate value */ 370238104Sdes a = context->state[0]; 371238104Sdes b = context->state[1]; 372238104Sdes c = context->state[2]; 373238104Sdes d = context->state[3]; 374238104Sdes e = context->state[4]; 375238104Sdes f = context->state[5]; 376238104Sdes g = context->state[6]; 377238104Sdes h = context->state[7]; 378238104Sdes 379238104Sdes j = 0; 380238104Sdes do { 381238104Sdes /* Rounds 0 to 15 (unrolled): */ 382238104Sdes ROUND256_0_TO_15(a,b,c,d,e,f,g,h); 383238104Sdes ROUND256_0_TO_15(h,a,b,c,d,e,f,g); 384238104Sdes ROUND256_0_TO_15(g,h,a,b,c,d,e,f); 385238104Sdes ROUND256_0_TO_15(f,g,h,a,b,c,d,e); 386238104Sdes ROUND256_0_TO_15(e,f,g,h,a,b,c,d); 387238104Sdes ROUND256_0_TO_15(d,e,f,g,h,a,b,c); 388238104Sdes ROUND256_0_TO_15(c,d,e,f,g,h,a,b); 389238104Sdes ROUND256_0_TO_15(b,c,d,e,f,g,h,a); 390238104Sdes } while (j < 16); 391238104Sdes 392238104Sdes /* Now for the remaining rounds to 64: */ 393238104Sdes do { 394238104Sdes ROUND256(a,b,c,d,e,f,g,h); 395238104Sdes ROUND256(h,a,b,c,d,e,f,g); 396238104Sdes ROUND256(g,h,a,b,c,d,e,f); 397238104Sdes ROUND256(f,g,h,a,b,c,d,e); 398238104Sdes ROUND256(e,f,g,h,a,b,c,d); 399238104Sdes ROUND256(d,e,f,g,h,a,b,c); 400238104Sdes ROUND256(c,d,e,f,g,h,a,b); 401238104Sdes ROUND256(b,c,d,e,f,g,h,a); 402238104Sdes } while (j < 64); 403238104Sdes 404238104Sdes /* Compute the current intermediate hash value */ 405238104Sdes context->state[0] += a; 406238104Sdes context->state[1] += b; 407238104Sdes context->state[2] += c; 408238104Sdes context->state[3] += d; 409238104Sdes context->state[4] += e; 410238104Sdes context->state[5] += f; 411238104Sdes context->state[6] += g; 412238104Sdes context->state[7] += h; 413238104Sdes 414238104Sdes /* Clean up */ 415238104Sdes a = b = c = d = e = f = g = h = T1 = 0; 416238104Sdes} 417238104Sdes 418238104Sdes#else /* SHA2_UNROLL_TRANSFORM */ 419238104Sdes 420238104Sdesstatic void ldns_sha256_Transform(ldns_sha256_CTX* context, 421238104Sdes const sha2_word32* data) { 422238104Sdes sha2_word32 a, b, c, d, e, f, g, h, s0, s1; 423238104Sdes sha2_word32 T1, T2, *W256; 424238104Sdes int j; 425238104Sdes 426238104Sdes W256 = (sha2_word32*)context->buffer; 427238104Sdes 428238104Sdes /* initialize registers with the prev. intermediate value */ 429238104Sdes a = context->state[0]; 430238104Sdes b = context->state[1]; 431238104Sdes c = context->state[2]; 432238104Sdes d = context->state[3]; 433238104Sdes e = context->state[4]; 434238104Sdes f = context->state[5]; 435238104Sdes g = context->state[6]; 436238104Sdes h = context->state[7]; 437238104Sdes 438238104Sdes j = 0; 439238104Sdes do { 440238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 441238104Sdes /* Copy data while converting to host byte order */ 442238104Sdes REVERSE32(*data++,W256[j]); 443238104Sdes /* Apply the SHA-256 compression function to update a..h */ 444238104Sdes T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + W256[j]; 445238104Sdes#else /* BYTE_ORDER == LITTLE_ENDIAN */ 446238104Sdes /* Apply the SHA-256 compression function to update a..h with copy */ 447238104Sdes T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + (W256[j] = *data++); 448238104Sdes#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 449238104Sdes T2 = Sigma0_256(a) + Maj(a, b, c); 450238104Sdes h = g; 451238104Sdes g = f; 452238104Sdes f = e; 453238104Sdes e = d + T1; 454238104Sdes d = c; 455238104Sdes c = b; 456238104Sdes b = a; 457238104Sdes a = T1 + T2; 458238104Sdes 459238104Sdes j++; 460238104Sdes } while (j < 16); 461238104Sdes 462238104Sdes do { 463238104Sdes /* Part of the message block expansion: */ 464238104Sdes s0 = W256[(j+1)&0x0f]; 465238104Sdes s0 = sigma0_256(s0); 466238104Sdes s1 = W256[(j+14)&0x0f]; 467238104Sdes s1 = sigma1_256(s1); 468238104Sdes 469238104Sdes /* Apply the SHA-256 compression function to update a..h */ 470238104Sdes T1 = h + Sigma1_256(e) + Ch(e, f, g) + K256[j] + 471238104Sdes (W256[j&0x0f] += s1 + W256[(j+9)&0x0f] + s0); 472238104Sdes T2 = Sigma0_256(a) + Maj(a, b, c); 473238104Sdes h = g; 474238104Sdes g = f; 475238104Sdes f = e; 476238104Sdes e = d + T1; 477238104Sdes d = c; 478238104Sdes c = b; 479238104Sdes b = a; 480238104Sdes a = T1 + T2; 481238104Sdes 482238104Sdes j++; 483238104Sdes } while (j < 64); 484238104Sdes 485238104Sdes /* Compute the current intermediate hash value */ 486238104Sdes context->state[0] += a; 487238104Sdes context->state[1] += b; 488238104Sdes context->state[2] += c; 489238104Sdes context->state[3] += d; 490238104Sdes context->state[4] += e; 491238104Sdes context->state[5] += f; 492238104Sdes context->state[6] += g; 493238104Sdes context->state[7] += h; 494238104Sdes 495238104Sdes /* Clean up */ 496238104Sdes a = b = c = d = e = f = g = h = T1 = T2 = 0; 497238104Sdes} 498238104Sdes 499238104Sdes#endif /* SHA2_UNROLL_TRANSFORM */ 500238104Sdes 501238104Sdesvoid ldns_sha256_update(ldns_sha256_CTX* context, const sha2_byte *data, size_t len) { 502238104Sdes size_t freespace, usedspace; 503238104Sdes 504238104Sdes if (len == 0) { 505238104Sdes /* Calling with no data is valid - we do nothing */ 506238104Sdes return; 507238104Sdes } 508238104Sdes 509238104Sdes /* Sanity check: */ 510238104Sdes assert(context != (ldns_sha256_CTX*)0 && data != (sha2_byte*)0); 511238104Sdes 512238104Sdes usedspace = (context->bitcount >> 3) % LDNS_SHA256_BLOCK_LENGTH; 513238104Sdes if (usedspace > 0) { 514238104Sdes /* Calculate how much free space is available in the buffer */ 515238104Sdes freespace = LDNS_SHA256_BLOCK_LENGTH - usedspace; 516238104Sdes 517238104Sdes if (len >= freespace) { 518238104Sdes /* Fill the buffer completely and process it */ 519238104Sdes MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace); 520238104Sdes context->bitcount += freespace << 3; 521238104Sdes len -= freespace; 522238104Sdes data += freespace; 523238104Sdes ldns_sha256_Transform(context, (sha2_word32*)context->buffer); 524238104Sdes } else { 525238104Sdes /* The buffer is not yet full */ 526238104Sdes MEMCPY_BCOPY(&context->buffer[usedspace], data, len); 527238104Sdes context->bitcount += len << 3; 528238104Sdes /* Clean up: */ 529238104Sdes usedspace = freespace = 0; 530238104Sdes return; 531238104Sdes } 532238104Sdes } 533238104Sdes while (len >= LDNS_SHA256_BLOCK_LENGTH) { 534238104Sdes /* Process as many complete blocks as we can */ 535238104Sdes ldns_sha256_Transform(context, (sha2_word32*)data); 536238104Sdes context->bitcount += LDNS_SHA256_BLOCK_LENGTH << 3; 537238104Sdes len -= LDNS_SHA256_BLOCK_LENGTH; 538238104Sdes data += LDNS_SHA256_BLOCK_LENGTH; 539238104Sdes } 540238104Sdes if (len > 0) { 541238104Sdes /* There's left-overs, so save 'em */ 542238104Sdes MEMCPY_BCOPY(context->buffer, data, len); 543238104Sdes context->bitcount += len << 3; 544238104Sdes } 545238104Sdes /* Clean up: */ 546238104Sdes usedspace = freespace = 0; 547238104Sdes} 548238104Sdes 549269257Sdestypedef union _ldns_sha2_buffer_union { 550269257Sdes uint8_t* theChars; 551269257Sdes uint64_t* theLongs; 552269257Sdes} ldns_sha2_buffer_union; 553269257Sdes 554238104Sdesvoid ldns_sha256_final(sha2_byte digest[], ldns_sha256_CTX* context) { 555238104Sdes sha2_word32 *d = (sha2_word32*)digest; 556238104Sdes size_t usedspace; 557269257Sdes ldns_sha2_buffer_union cast_var; 558238104Sdes 559238104Sdes /* Sanity check: */ 560238104Sdes assert(context != (ldns_sha256_CTX*)0); 561238104Sdes 562238104Sdes /* If no digest buffer is passed, we don't bother doing this: */ 563238104Sdes if (digest != (sha2_byte*)0) { 564238104Sdes usedspace = (context->bitcount >> 3) % LDNS_SHA256_BLOCK_LENGTH; 565238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 566238104Sdes /* Convert FROM host byte order */ 567238104Sdes REVERSE64(context->bitcount,context->bitcount); 568238104Sdes#endif 569238104Sdes if (usedspace > 0) { 570238104Sdes /* Begin padding with a 1 bit: */ 571238104Sdes context->buffer[usedspace++] = 0x80; 572238104Sdes 573238104Sdes if (usedspace <= ldns_sha256_SHORT_BLOCK_LENGTH) { 574238104Sdes /* Set-up for the last transform: */ 575238104Sdes MEMSET_BZERO(&context->buffer[usedspace], ldns_sha256_SHORT_BLOCK_LENGTH - usedspace); 576238104Sdes } else { 577238104Sdes if (usedspace < LDNS_SHA256_BLOCK_LENGTH) { 578238104Sdes MEMSET_BZERO(&context->buffer[usedspace], LDNS_SHA256_BLOCK_LENGTH - usedspace); 579238104Sdes } 580238104Sdes /* Do second-to-last transform: */ 581238104Sdes ldns_sha256_Transform(context, (sha2_word32*)context->buffer); 582238104Sdes 583238104Sdes /* And set-up for the last transform: */ 584238104Sdes MEMSET_BZERO(context->buffer, ldns_sha256_SHORT_BLOCK_LENGTH); 585238104Sdes } 586238104Sdes } else { 587238104Sdes /* Set-up for the last transform: */ 588238104Sdes MEMSET_BZERO(context->buffer, ldns_sha256_SHORT_BLOCK_LENGTH); 589238104Sdes 590238104Sdes /* Begin padding with a 1 bit: */ 591238104Sdes *context->buffer = 0x80; 592238104Sdes } 593238104Sdes /* Set the bit count: */ 594269257Sdes cast_var.theChars = context->buffer; 595269257Sdes cast_var.theLongs[ldns_sha256_SHORT_BLOCK_LENGTH / 8] = context->bitcount; 596238104Sdes 597238104Sdes /* final transform: */ 598238104Sdes ldns_sha256_Transform(context, (sha2_word32*)context->buffer); 599238104Sdes 600238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 601238104Sdes { 602238104Sdes /* Convert TO host byte order */ 603238104Sdes int j; 604238104Sdes for (j = 0; j < 8; j++) { 605238104Sdes REVERSE32(context->state[j],context->state[j]); 606238104Sdes *d++ = context->state[j]; 607238104Sdes } 608238104Sdes } 609238104Sdes#else 610238104Sdes MEMCPY_BCOPY(d, context->state, LDNS_SHA256_DIGEST_LENGTH); 611238104Sdes#endif 612238104Sdes } 613238104Sdes 614238104Sdes /* Clean up state data: */ 615238104Sdes MEMSET_BZERO(context, sizeof(ldns_sha256_CTX)); 616238104Sdes usedspace = 0; 617238104Sdes} 618238104Sdes 619238104Sdesunsigned char * 620238104Sdesldns_sha256(unsigned char *data, unsigned int data_len, unsigned char *digest) 621238104Sdes{ 622238104Sdes ldns_sha256_CTX ctx; 623238104Sdes ldns_sha256_init(&ctx); 624238104Sdes ldns_sha256_update(&ctx, data, data_len); 625238104Sdes ldns_sha256_final(digest, &ctx); 626238104Sdes return digest; 627238104Sdes} 628238104Sdes 629238104Sdes/*** SHA-512: *********************************************************/ 630238104Sdesvoid ldns_sha512_init(ldns_sha512_CTX* context) { 631238104Sdes if (context == (ldns_sha512_CTX*)0) { 632238104Sdes return; 633238104Sdes } 634238104Sdes MEMCPY_BCOPY(context->state, sha512_initial_hash_value, LDNS_SHA512_DIGEST_LENGTH); 635238104Sdes MEMSET_BZERO(context->buffer, LDNS_SHA512_BLOCK_LENGTH); 636238104Sdes context->bitcount[0] = context->bitcount[1] = 0; 637238104Sdes} 638238104Sdes 639238104Sdes#ifdef SHA2_UNROLL_TRANSFORM 640238104Sdes 641238104Sdes/* Unrolled SHA-512 round macros: */ 642238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 643238104Sdes 644238104Sdes#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \ 645238104Sdes REVERSE64(*data++, W512[j]); \ 646238104Sdes T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \ 647238104Sdes K512[j] + W512[j]; \ 648238104Sdes (d) += T1, \ 649238104Sdes (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)), \ 650238104Sdes j++ 651238104Sdes 652238104Sdes 653238104Sdes#else /* BYTE_ORDER == LITTLE_ENDIAN */ 654238104Sdes 655238104Sdes#define ROUND512_0_TO_15(a,b,c,d,e,f,g,h) \ 656238104Sdes T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + \ 657238104Sdes K512[j] + (W512[j] = *data++); \ 658238104Sdes (d) += T1; \ 659238104Sdes (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \ 660238104Sdes j++ 661238104Sdes 662238104Sdes#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 663238104Sdes 664238104Sdes#define ROUND512(a,b,c,d,e,f,g,h) \ 665238104Sdes s0 = W512[(j+1)&0x0f]; \ 666238104Sdes s0 = sigma0_512(s0); \ 667238104Sdes s1 = W512[(j+14)&0x0f]; \ 668238104Sdes s1 = sigma1_512(s1); \ 669238104Sdes T1 = (h) + Sigma1_512(e) + Ch((e), (f), (g)) + K512[j] + \ 670238104Sdes (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); \ 671238104Sdes (d) += T1; \ 672238104Sdes (h) = T1 + Sigma0_512(a) + Maj((a), (b), (c)); \ 673238104Sdes j++ 674238104Sdes 675238104Sdesstatic void ldns_sha512_Transform(ldns_sha512_CTX* context, 676238104Sdes const sha2_word64* data) { 677238104Sdes sha2_word64 a, b, c, d, e, f, g, h, s0, s1; 678238104Sdes sha2_word64 T1, *W512 = (sha2_word64*)context->buffer; 679238104Sdes int j; 680238104Sdes 681238104Sdes /* initialize registers with the prev. intermediate value */ 682238104Sdes a = context->state[0]; 683238104Sdes b = context->state[1]; 684238104Sdes c = context->state[2]; 685238104Sdes d = context->state[3]; 686238104Sdes e = context->state[4]; 687238104Sdes f = context->state[5]; 688238104Sdes g = context->state[6]; 689238104Sdes h = context->state[7]; 690238104Sdes 691238104Sdes j = 0; 692238104Sdes do { 693238104Sdes ROUND512_0_TO_15(a,b,c,d,e,f,g,h); 694238104Sdes ROUND512_0_TO_15(h,a,b,c,d,e,f,g); 695238104Sdes ROUND512_0_TO_15(g,h,a,b,c,d,e,f); 696238104Sdes ROUND512_0_TO_15(f,g,h,a,b,c,d,e); 697238104Sdes ROUND512_0_TO_15(e,f,g,h,a,b,c,d); 698238104Sdes ROUND512_0_TO_15(d,e,f,g,h,a,b,c); 699238104Sdes ROUND512_0_TO_15(c,d,e,f,g,h,a,b); 700238104Sdes ROUND512_0_TO_15(b,c,d,e,f,g,h,a); 701238104Sdes } while (j < 16); 702238104Sdes 703238104Sdes /* Now for the remaining rounds up to 79: */ 704238104Sdes do { 705238104Sdes ROUND512(a,b,c,d,e,f,g,h); 706238104Sdes ROUND512(h,a,b,c,d,e,f,g); 707238104Sdes ROUND512(g,h,a,b,c,d,e,f); 708238104Sdes ROUND512(f,g,h,a,b,c,d,e); 709238104Sdes ROUND512(e,f,g,h,a,b,c,d); 710238104Sdes ROUND512(d,e,f,g,h,a,b,c); 711238104Sdes ROUND512(c,d,e,f,g,h,a,b); 712238104Sdes ROUND512(b,c,d,e,f,g,h,a); 713238104Sdes } while (j < 80); 714238104Sdes 715238104Sdes /* Compute the current intermediate hash value */ 716238104Sdes context->state[0] += a; 717238104Sdes context->state[1] += b; 718238104Sdes context->state[2] += c; 719238104Sdes context->state[3] += d; 720238104Sdes context->state[4] += e; 721238104Sdes context->state[5] += f; 722238104Sdes context->state[6] += g; 723238104Sdes context->state[7] += h; 724238104Sdes 725238104Sdes /* Clean up */ 726238104Sdes a = b = c = d = e = f = g = h = T1 = 0; 727238104Sdes} 728238104Sdes 729238104Sdes#else /* SHA2_UNROLL_TRANSFORM */ 730238104Sdes 731238104Sdesstatic void ldns_sha512_Transform(ldns_sha512_CTX* context, 732238104Sdes const sha2_word64* data) { 733238104Sdes sha2_word64 a, b, c, d, e, f, g, h, s0, s1; 734238104Sdes sha2_word64 T1, T2, *W512 = (sha2_word64*)context->buffer; 735238104Sdes int j; 736238104Sdes 737238104Sdes /* initialize registers with the prev. intermediate value */ 738238104Sdes a = context->state[0]; 739238104Sdes b = context->state[1]; 740238104Sdes c = context->state[2]; 741238104Sdes d = context->state[3]; 742238104Sdes e = context->state[4]; 743238104Sdes f = context->state[5]; 744238104Sdes g = context->state[6]; 745238104Sdes h = context->state[7]; 746238104Sdes 747238104Sdes j = 0; 748238104Sdes do { 749238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 750238104Sdes /* Convert TO host byte order */ 751238104Sdes REVERSE64(*data++, W512[j]); 752238104Sdes /* Apply the SHA-512 compression function to update a..h */ 753238104Sdes T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + W512[j]; 754238104Sdes#else /* BYTE_ORDER == LITTLE_ENDIAN */ 755238104Sdes /* Apply the SHA-512 compression function to update a..h with copy */ 756238104Sdes T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + (W512[j] = *data++); 757238104Sdes#endif /* BYTE_ORDER == LITTLE_ENDIAN */ 758238104Sdes T2 = Sigma0_512(a) + Maj(a, b, c); 759238104Sdes h = g; 760238104Sdes g = f; 761238104Sdes f = e; 762238104Sdes e = d + T1; 763238104Sdes d = c; 764238104Sdes c = b; 765238104Sdes b = a; 766238104Sdes a = T1 + T2; 767238104Sdes 768238104Sdes j++; 769238104Sdes } while (j < 16); 770238104Sdes 771238104Sdes do { 772238104Sdes /* Part of the message block expansion: */ 773238104Sdes s0 = W512[(j+1)&0x0f]; 774238104Sdes s0 = sigma0_512(s0); 775238104Sdes s1 = W512[(j+14)&0x0f]; 776238104Sdes s1 = sigma1_512(s1); 777238104Sdes 778238104Sdes /* Apply the SHA-512 compression function to update a..h */ 779238104Sdes T1 = h + Sigma1_512(e) + Ch(e, f, g) + K512[j] + 780238104Sdes (W512[j&0x0f] += s1 + W512[(j+9)&0x0f] + s0); 781238104Sdes T2 = Sigma0_512(a) + Maj(a, b, c); 782238104Sdes h = g; 783238104Sdes g = f; 784238104Sdes f = e; 785238104Sdes e = d + T1; 786238104Sdes d = c; 787238104Sdes c = b; 788238104Sdes b = a; 789238104Sdes a = T1 + T2; 790238104Sdes 791238104Sdes j++; 792238104Sdes } while (j < 80); 793238104Sdes 794238104Sdes /* Compute the current intermediate hash value */ 795238104Sdes context->state[0] += a; 796238104Sdes context->state[1] += b; 797238104Sdes context->state[2] += c; 798238104Sdes context->state[3] += d; 799238104Sdes context->state[4] += e; 800238104Sdes context->state[5] += f; 801238104Sdes context->state[6] += g; 802238104Sdes context->state[7] += h; 803238104Sdes 804238104Sdes /* Clean up */ 805238104Sdes a = b = c = d = e = f = g = h = T1 = T2 = 0; 806238104Sdes} 807238104Sdes 808238104Sdes#endif /* SHA2_UNROLL_TRANSFORM */ 809238104Sdes 810238104Sdesvoid ldns_sha512_update(ldns_sha512_CTX* context, const sha2_byte *data, size_t len) { 811238104Sdes size_t freespace, usedspace; 812238104Sdes 813238104Sdes if (len == 0) { 814238104Sdes /* Calling with no data is valid - we do nothing */ 815238104Sdes return; 816238104Sdes } 817238104Sdes 818238104Sdes /* Sanity check: */ 819238104Sdes assert(context != (ldns_sha512_CTX*)0 && data != (sha2_byte*)0); 820238104Sdes 821238104Sdes usedspace = (context->bitcount[0] >> 3) % LDNS_SHA512_BLOCK_LENGTH; 822238104Sdes if (usedspace > 0) { 823238104Sdes /* Calculate how much free space is available in the buffer */ 824238104Sdes freespace = LDNS_SHA512_BLOCK_LENGTH - usedspace; 825238104Sdes 826238104Sdes if (len >= freespace) { 827238104Sdes /* Fill the buffer completely and process it */ 828238104Sdes MEMCPY_BCOPY(&context->buffer[usedspace], data, freespace); 829238104Sdes ADDINC128(context->bitcount, freespace << 3); 830238104Sdes len -= freespace; 831238104Sdes data += freespace; 832238104Sdes ldns_sha512_Transform(context, (sha2_word64*)context->buffer); 833238104Sdes } else { 834238104Sdes /* The buffer is not yet full */ 835238104Sdes MEMCPY_BCOPY(&context->buffer[usedspace], data, len); 836238104Sdes ADDINC128(context->bitcount, len << 3); 837238104Sdes /* Clean up: */ 838238104Sdes usedspace = freespace = 0; 839238104Sdes return; 840238104Sdes } 841238104Sdes } 842238104Sdes while (len >= LDNS_SHA512_BLOCK_LENGTH) { 843238104Sdes /* Process as many complete blocks as we can */ 844238104Sdes ldns_sha512_Transform(context, (sha2_word64*)data); 845238104Sdes ADDINC128(context->bitcount, LDNS_SHA512_BLOCK_LENGTH << 3); 846238104Sdes len -= LDNS_SHA512_BLOCK_LENGTH; 847238104Sdes data += LDNS_SHA512_BLOCK_LENGTH; 848238104Sdes } 849238104Sdes if (len > 0) { 850238104Sdes /* There's left-overs, so save 'em */ 851238104Sdes MEMCPY_BCOPY(context->buffer, data, len); 852238104Sdes ADDINC128(context->bitcount, len << 3); 853238104Sdes } 854238104Sdes /* Clean up: */ 855238104Sdes usedspace = freespace = 0; 856238104Sdes} 857238104Sdes 858238104Sdesstatic void ldns_sha512_Last(ldns_sha512_CTX* context) { 859238104Sdes size_t usedspace; 860269257Sdes ldns_sha2_buffer_union cast_var; 861238104Sdes 862238104Sdes usedspace = (context->bitcount[0] >> 3) % LDNS_SHA512_BLOCK_LENGTH; 863238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 864238104Sdes /* Convert FROM host byte order */ 865238104Sdes REVERSE64(context->bitcount[0],context->bitcount[0]); 866238104Sdes REVERSE64(context->bitcount[1],context->bitcount[1]); 867238104Sdes#endif 868238104Sdes if (usedspace > 0) { 869238104Sdes /* Begin padding with a 1 bit: */ 870238104Sdes context->buffer[usedspace++] = 0x80; 871238104Sdes 872238104Sdes if (usedspace <= ldns_sha512_SHORT_BLOCK_LENGTH) { 873238104Sdes /* Set-up for the last transform: */ 874238104Sdes MEMSET_BZERO(&context->buffer[usedspace], ldns_sha512_SHORT_BLOCK_LENGTH - usedspace); 875238104Sdes } else { 876238104Sdes if (usedspace < LDNS_SHA512_BLOCK_LENGTH) { 877238104Sdes MEMSET_BZERO(&context->buffer[usedspace], LDNS_SHA512_BLOCK_LENGTH - usedspace); 878238104Sdes } 879238104Sdes /* Do second-to-last transform: */ 880238104Sdes ldns_sha512_Transform(context, (sha2_word64*)context->buffer); 881238104Sdes 882238104Sdes /* And set-up for the last transform: */ 883238104Sdes MEMSET_BZERO(context->buffer, LDNS_SHA512_BLOCK_LENGTH - 2); 884238104Sdes } 885238104Sdes } else { 886238104Sdes /* Prepare for final transform: */ 887238104Sdes MEMSET_BZERO(context->buffer, ldns_sha512_SHORT_BLOCK_LENGTH); 888238104Sdes 889238104Sdes /* Begin padding with a 1 bit: */ 890238104Sdes *context->buffer = 0x80; 891238104Sdes } 892238104Sdes /* Store the length of input data (in bits): */ 893269257Sdes cast_var.theChars = context->buffer; 894269257Sdes cast_var.theLongs[ldns_sha512_SHORT_BLOCK_LENGTH / 8] = context->bitcount[1]; 895269257Sdes cast_var.theLongs[ldns_sha512_SHORT_BLOCK_LENGTH / 8 + 1] = context->bitcount[0]; 896238104Sdes 897238104Sdes /* final transform: */ 898238104Sdes ldns_sha512_Transform(context, (sha2_word64*)context->buffer); 899238104Sdes} 900238104Sdes 901238104Sdesvoid ldns_sha512_final(sha2_byte digest[], ldns_sha512_CTX* context) { 902238104Sdes sha2_word64 *d = (sha2_word64*)digest; 903238104Sdes 904238104Sdes /* Sanity check: */ 905238104Sdes assert(context != (ldns_sha512_CTX*)0); 906238104Sdes 907238104Sdes /* If no digest buffer is passed, we don't bother doing this: */ 908238104Sdes if (digest != (sha2_byte*)0) { 909238104Sdes ldns_sha512_Last(context); 910238104Sdes 911238104Sdes /* Save the hash data for output: */ 912238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 913238104Sdes { 914238104Sdes /* Convert TO host byte order */ 915238104Sdes int j; 916238104Sdes for (j = 0; j < 8; j++) { 917238104Sdes REVERSE64(context->state[j],context->state[j]); 918238104Sdes *d++ = context->state[j]; 919238104Sdes } 920238104Sdes } 921238104Sdes#else 922238104Sdes MEMCPY_BCOPY(d, context->state, LDNS_SHA512_DIGEST_LENGTH); 923238104Sdes#endif 924238104Sdes } 925238104Sdes 926238104Sdes /* Zero out state data */ 927238104Sdes MEMSET_BZERO(context, sizeof(ldns_sha512_CTX)); 928238104Sdes} 929238104Sdes 930238104Sdesunsigned char * 931238104Sdesldns_sha512(unsigned char *data, unsigned int data_len, unsigned char *digest) 932238104Sdes{ 933238104Sdes ldns_sha512_CTX ctx; 934238104Sdes ldns_sha512_init(&ctx); 935238104Sdes ldns_sha512_update(&ctx, data, data_len); 936238104Sdes ldns_sha512_final(digest, &ctx); 937238104Sdes return digest; 938238104Sdes} 939238104Sdes 940238104Sdes/*** SHA-384: *********************************************************/ 941238104Sdesvoid ldns_sha384_init(ldns_sha384_CTX* context) { 942238104Sdes if (context == (ldns_sha384_CTX*)0) { 943238104Sdes return; 944238104Sdes } 945238104Sdes MEMCPY_BCOPY(context->state, sha384_initial_hash_value, LDNS_SHA512_DIGEST_LENGTH); 946238104Sdes MEMSET_BZERO(context->buffer, LDNS_SHA384_BLOCK_LENGTH); 947238104Sdes context->bitcount[0] = context->bitcount[1] = 0; 948238104Sdes} 949238104Sdes 950238104Sdesvoid ldns_sha384_update(ldns_sha384_CTX* context, const sha2_byte* data, size_t len) { 951238104Sdes ldns_sha512_update((ldns_sha512_CTX*)context, data, len); 952238104Sdes} 953238104Sdes 954238104Sdesvoid ldns_sha384_final(sha2_byte digest[], ldns_sha384_CTX* context) { 955238104Sdes sha2_word64 *d = (sha2_word64*)digest; 956238104Sdes 957238104Sdes /* Sanity check: */ 958238104Sdes assert(context != (ldns_sha384_CTX*)0); 959238104Sdes 960238104Sdes /* If no digest buffer is passed, we don't bother doing this: */ 961238104Sdes if (digest != (sha2_byte*)0) { 962238104Sdes ldns_sha512_Last((ldns_sha512_CTX*)context); 963238104Sdes 964238104Sdes /* Save the hash data for output: */ 965238104Sdes#if BYTE_ORDER == LITTLE_ENDIAN 966238104Sdes { 967238104Sdes /* Convert TO host byte order */ 968238104Sdes int j; 969238104Sdes for (j = 0; j < 6; j++) { 970238104Sdes REVERSE64(context->state[j],context->state[j]); 971238104Sdes *d++ = context->state[j]; 972238104Sdes } 973238104Sdes } 974238104Sdes#else 975238104Sdes MEMCPY_BCOPY(d, context->state, LDNS_SHA384_DIGEST_LENGTH); 976238104Sdes#endif 977238104Sdes } 978238104Sdes 979238104Sdes /* Zero out state data */ 980238104Sdes MEMSET_BZERO(context, sizeof(ldns_sha384_CTX)); 981238104Sdes} 982238104Sdes 983238104Sdesunsigned char * 984238104Sdesldns_sha384(unsigned char *data, unsigned int data_len, unsigned char *digest) 985238104Sdes{ 986238104Sdes ldns_sha384_CTX ctx; 987238104Sdes ldns_sha384_init(&ctx); 988238104Sdes ldns_sha384_update(&ctx, data, data_len); 989238104Sdes ldns_sha384_final(digest, &ctx); 990238104Sdes return digest; 991238104Sdes} 992