md4.c (31a61bfc6e415fbd871317cbee7b8a4158d8ac5b) | md4.c (808a1763cef93bf0f740d7e10dd9a2dfc4065b1a) |
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1/* 2 * Cryptographic API. 3 * 4 * MD4 Message Digest Algorithm (RFC1320). 5 * 6 * Implementation derived from Andrew Tridgell and Steve French's 7 * CIFS MD4 implementation, and the cryptoapi implementation 8 * originally based on the public domain implementation written --- 6 unchanged lines hidden (view full) --- 15 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 16 * 17 * This program is free software; you can redistribute it and/or modify 18 * it under the terms of the GNU General Public License as published by 19 * the Free Software Foundation; either version 2 of the License, or 20 * (at your option) any later version. 21 * 22 */ | 1/* 2 * Cryptographic API. 3 * 4 * MD4 Message Digest Algorithm (RFC1320). 5 * 6 * Implementation derived from Andrew Tridgell and Steve French's 7 * CIFS MD4 implementation, and the cryptoapi implementation 8 * originally based on the public domain implementation written --- 6 unchanged lines hidden (view full) --- 15 * Copyright (c) 2002 James Morris <jmorris@intercode.com.au> 16 * 17 * This program is free software; you can redistribute it and/or modify 18 * it under the terms of the GNU General Public License as published by 19 * the Free Software Foundation; either version 2 of the License, or 20 * (at your option) any later version. 21 * 22 */ |
23#include <crypto/internal/hash.h> |
|
23#include <linux/init.h> | 24#include <linux/init.h> |
24#include <linux/crypto.h> | |
25#include <linux/kernel.h> 26#include <linux/string.h> 27#include <linux/types.h> 28#include <asm/byteorder.h> 29 30#define MD4_DIGEST_SIZE 16 31#define MD4_HMAC_BLOCK_SIZE 64 32#define MD4_BLOCK_WORDS 16 --- 20 unchanged lines hidden (view full) --- 53{ 54 return (x & y) | (x & z) | (y & z); 55} 56 57static inline u32 H(u32 x, u32 y, u32 z) 58{ 59 return x ^ y ^ z; 60} | 25#include <linux/kernel.h> 26#include <linux/string.h> 27#include <linux/types.h> 28#include <asm/byteorder.h> 29 30#define MD4_DIGEST_SIZE 16 31#define MD4_HMAC_BLOCK_SIZE 64 32#define MD4_BLOCK_WORDS 16 --- 20 unchanged lines hidden (view full) --- 53{ 54 return (x & y) | (x & z) | (y & z); 55} 56 57static inline u32 H(u32 x, u32 y, u32 z) 58{ 59 return x ^ y ^ z; 60} |
61 | 61 |
62#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s)) 63#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (u32)0x5A827999,s)) 64#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (u32)0x6ED9EBA1,s)) 65 66/* XXX: this stuff can be optimized */ 67static inline void le32_to_cpu_array(u32 *buf, unsigned int words) 68{ 69 while (words--) { --- 77 unchanged lines hidden (view full) --- 147} 148 149static inline void md4_transform_helper(struct md4_ctx *ctx) 150{ 151 le32_to_cpu_array(ctx->block, ARRAY_SIZE(ctx->block)); 152 md4_transform(ctx->hash, ctx->block); 153} 154 | 62#define ROUND1(a,b,c,d,k,s) (a = lshift(a + F(b,c,d) + k, s)) 63#define ROUND2(a,b,c,d,k,s) (a = lshift(a + G(b,c,d) + k + (u32)0x5A827999,s)) 64#define ROUND3(a,b,c,d,k,s) (a = lshift(a + H(b,c,d) + k + (u32)0x6ED9EBA1,s)) 65 66/* XXX: this stuff can be optimized */ 67static inline void le32_to_cpu_array(u32 *buf, unsigned int words) 68{ 69 while (words--) { --- 77 unchanged lines hidden (view full) --- 147} 148 149static inline void md4_transform_helper(struct md4_ctx *ctx) 150{ 151 le32_to_cpu_array(ctx->block, ARRAY_SIZE(ctx->block)); 152 md4_transform(ctx->hash, ctx->block); 153} 154 |
155static void md4_init(struct crypto_tfm *tfm) | 155static int md4_init(struct shash_desc *desc) |
156{ | 156{ |
157 struct md4_ctx *mctx = crypto_tfm_ctx(tfm); | 157 struct md4_ctx *mctx = shash_desc_ctx(desc); |
158 159 mctx->hash[0] = 0x67452301; 160 mctx->hash[1] = 0xefcdab89; 161 mctx->hash[2] = 0x98badcfe; 162 mctx->hash[3] = 0x10325476; 163 mctx->byte_count = 0; | 158 159 mctx->hash[0] = 0x67452301; 160 mctx->hash[1] = 0xefcdab89; 161 mctx->hash[2] = 0x98badcfe; 162 mctx->hash[3] = 0x10325476; 163 mctx->byte_count = 0; |
164 165 return 0; |
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164} 165 | 166} 167 |
166static void md4_update(struct crypto_tfm *tfm, const u8 *data, unsigned int len) | 168static int md4_update(struct shash_desc *desc, const u8 *data, unsigned int len) |
167{ | 169{ |
168 struct md4_ctx *mctx = crypto_tfm_ctx(tfm); | 170 struct md4_ctx *mctx = shash_desc_ctx(desc); |
169 const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f); 170 171 mctx->byte_count += len; 172 173 if (avail > len) { 174 memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), 175 data, len); | 171 const u32 avail = sizeof(mctx->block) - (mctx->byte_count & 0x3f); 172 173 mctx->byte_count += len; 174 175 if (avail > len) { 176 memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), 177 data, len); |
176 return; | 178 return 0; |
177 } 178 179 memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), 180 data, avail); 181 182 md4_transform_helper(mctx); 183 data += avail; 184 len -= avail; 185 186 while (len >= sizeof(mctx->block)) { 187 memcpy(mctx->block, data, sizeof(mctx->block)); 188 md4_transform_helper(mctx); 189 data += sizeof(mctx->block); 190 len -= sizeof(mctx->block); 191 } 192 193 memcpy(mctx->block, data, len); | 179 } 180 181 memcpy((char *)mctx->block + (sizeof(mctx->block) - avail), 182 data, avail); 183 184 md4_transform_helper(mctx); 185 data += avail; 186 len -= avail; 187 188 while (len >= sizeof(mctx->block)) { 189 memcpy(mctx->block, data, sizeof(mctx->block)); 190 md4_transform_helper(mctx); 191 data += sizeof(mctx->block); 192 len -= sizeof(mctx->block); 193 } 194 195 memcpy(mctx->block, data, len); |
196 197 return 0; |
|
194} 195 | 198} 199 |
196static void md4_final(struct crypto_tfm *tfm, u8 *out) | 200static int md4_final(struct shash_desc *desc, u8 *out) |
197{ | 201{ |
198 struct md4_ctx *mctx = crypto_tfm_ctx(tfm); | 202 struct md4_ctx *mctx = shash_desc_ctx(desc); |
199 const unsigned int offset = mctx->byte_count & 0x3f; 200 char *p = (char *)mctx->block + offset; 201 int padding = 56 - (offset + 1); 202 203 *p++ = 0x80; 204 if (padding < 0) { 205 memset(p, 0x00, padding + sizeof (u64)); 206 md4_transform_helper(mctx); --- 5 unchanged lines hidden (view full) --- 212 mctx->block[14] = mctx->byte_count << 3; 213 mctx->block[15] = mctx->byte_count >> 29; 214 le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - 215 sizeof(u64)) / sizeof(u32)); 216 md4_transform(mctx->hash, mctx->block); 217 cpu_to_le32_array(mctx->hash, ARRAY_SIZE(mctx->hash)); 218 memcpy(out, mctx->hash, sizeof(mctx->hash)); 219 memset(mctx, 0, sizeof(*mctx)); | 203 const unsigned int offset = mctx->byte_count & 0x3f; 204 char *p = (char *)mctx->block + offset; 205 int padding = 56 - (offset + 1); 206 207 *p++ = 0x80; 208 if (padding < 0) { 209 memset(p, 0x00, padding + sizeof (u64)); 210 md4_transform_helper(mctx); --- 5 unchanged lines hidden (view full) --- 216 mctx->block[14] = mctx->byte_count << 3; 217 mctx->block[15] = mctx->byte_count >> 29; 218 le32_to_cpu_array(mctx->block, (sizeof(mctx->block) - 219 sizeof(u64)) / sizeof(u32)); 220 md4_transform(mctx->hash, mctx->block); 221 cpu_to_le32_array(mctx->hash, ARRAY_SIZE(mctx->hash)); 222 memcpy(out, mctx->hash, sizeof(mctx->hash)); 223 memset(mctx, 0, sizeof(*mctx)); |
224 225 return 0; |
|
220} 221 | 226} 227 |
222static struct crypto_alg alg = { 223 .cra_name = "md4", 224 .cra_flags = CRYPTO_ALG_TYPE_DIGEST, 225 .cra_blocksize = MD4_HMAC_BLOCK_SIZE, 226 .cra_ctxsize = sizeof(struct md4_ctx), 227 .cra_module = THIS_MODULE, 228 .cra_list = LIST_HEAD_INIT(alg.cra_list), 229 .cra_u = { .digest = { 230 .dia_digestsize = MD4_DIGEST_SIZE, 231 .dia_init = md4_init, 232 .dia_update = md4_update, 233 .dia_final = md4_final } } | 228static struct shash_alg alg = { 229 .digestsize = MD4_DIGEST_SIZE, 230 .init = md4_init, 231 .update = md4_update, 232 .final = md4_final, 233 .descsize = sizeof(struct md4_ctx), 234 .base = { 235 .cra_name = "md4", 236 .cra_flags = CRYPTO_ALG_TYPE_SHASH, 237 .cra_blocksize = MD4_HMAC_BLOCK_SIZE, 238 .cra_module = THIS_MODULE, 239 } |
234}; 235 236static int __init md4_mod_init(void) 237{ | 240}; 241 242static int __init md4_mod_init(void) 243{ |
238 return crypto_register_alg(&alg); | 244 return crypto_register_shash(&alg); |
239} 240 241static void __exit md4_mod_fini(void) 242{ | 245} 246 247static void __exit md4_mod_fini(void) 248{ |
243 crypto_unregister_alg(&alg); | 249 crypto_unregister_shash(&alg); |
244} 245 246module_init(md4_mod_init); 247module_exit(md4_mod_fini); 248 249MODULE_LICENSE("GPL"); 250MODULE_DESCRIPTION("MD4 Message Digest Algorithm"); 251 | 250} 251 252module_init(md4_mod_init); 253module_exit(md4_mod_fini); 254 255MODULE_LICENSE("GPL"); 256MODULE_DESCRIPTION("MD4 Message Digest Algorithm"); 257 |