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Diffstat (limited to 'src/lib/libcrypto/hmac/hmac.c')
-rw-r--r--src/lib/libcrypto/hmac/hmac.c214
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diff --git a/src/lib/libcrypto/hmac/hmac.c b/src/lib/libcrypto/hmac/hmac.c
deleted file mode 100644
index 6c98fc43a3..0000000000
--- a/src/lib/libcrypto/hmac/hmac.c
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1/* crypto/hmac/hmac.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include "cryptlib.h"
62#include <openssl/hmac.h>
63
64int HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len,
65 const EVP_MD *md, ENGINE *impl)
66 {
67 int i,j,reset=0;
68 unsigned char pad[HMAC_MAX_MD_CBLOCK];
69
70 if (md != NULL)
71 {
72 reset=1;
73 ctx->md=md;
74 }
75 else
76 md=ctx->md;
77
78 if (key != NULL)
79 {
80 reset=1;
81 j=EVP_MD_block_size(md);
82 OPENSSL_assert(j <= (int)sizeof(ctx->key));
83 if (j < len)
84 {
85 if (!EVP_DigestInit_ex(&ctx->md_ctx,md, impl))
86 goto err;
87 if (!EVP_DigestUpdate(&ctx->md_ctx,key,len))
88 goto err;
89 if (!EVP_DigestFinal_ex(&(ctx->md_ctx),ctx->key,
90 &ctx->key_length))
91 goto err;
92 }
93 else
94 {
95 OPENSSL_assert(len>=0 && len<=(int)sizeof(ctx->key));
96 memcpy(ctx->key,key,len);
97 ctx->key_length=len;
98 }
99 if(ctx->key_length != HMAC_MAX_MD_CBLOCK)
100 memset(&ctx->key[ctx->key_length], 0,
101 HMAC_MAX_MD_CBLOCK - ctx->key_length);
102 }
103
104 if (reset)
105 {
106 for (i=0; i<HMAC_MAX_MD_CBLOCK; i++)
107 pad[i]=0x36^ctx->key[i];
108 if (!EVP_DigestInit_ex(&ctx->i_ctx,md, impl))
109 goto err;
110 if (!EVP_DigestUpdate(&ctx->i_ctx,pad,EVP_MD_block_size(md)))
111 goto err;
112
113 for (i=0; i<HMAC_MAX_MD_CBLOCK; i++)
114 pad[i]=0x5c^ctx->key[i];
115 if (!EVP_DigestInit_ex(&ctx->o_ctx,md, impl))
116 goto err;
117 if (!EVP_DigestUpdate(&ctx->o_ctx,pad,EVP_MD_block_size(md)))
118 goto err;
119 }
120 if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->i_ctx))
121 goto err;
122 return 1;
123 err:
124 return 0;
125 }
126
127int HMAC_Init(HMAC_CTX *ctx, const void *key, int len, const EVP_MD *md)
128 {
129 if(key && md)
130 HMAC_CTX_init(ctx);
131 return HMAC_Init_ex(ctx,key,len,md, NULL);
132 }
133
134int HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len)
135 {
136 return EVP_DigestUpdate(&ctx->md_ctx,data,len);
137 }
138
139int HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len)
140 {
141 unsigned int i;
142 unsigned char buf[EVP_MAX_MD_SIZE];
143
144 if (!EVP_DigestFinal_ex(&ctx->md_ctx,buf,&i))
145 goto err;
146 if (!EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->o_ctx))
147 goto err;
148 if (!EVP_DigestUpdate(&ctx->md_ctx,buf,i))
149 goto err;
150 if (!EVP_DigestFinal_ex(&ctx->md_ctx,md,len))
151 goto err;
152 return 1;
153 err:
154 return 0;
155 }
156
157void HMAC_CTX_init(HMAC_CTX *ctx)
158 {
159 EVP_MD_CTX_init(&ctx->i_ctx);
160 EVP_MD_CTX_init(&ctx->o_ctx);
161 EVP_MD_CTX_init(&ctx->md_ctx);
162 }
163
164int HMAC_CTX_copy(HMAC_CTX *dctx, HMAC_CTX *sctx)
165 {
166 if (!EVP_MD_CTX_copy(&dctx->i_ctx, &sctx->i_ctx))
167 goto err;
168 if (!EVP_MD_CTX_copy(&dctx->o_ctx, &sctx->o_ctx))
169 goto err;
170 if (!EVP_MD_CTX_copy(&dctx->md_ctx, &sctx->md_ctx))
171 goto err;
172 memcpy(dctx->key, sctx->key, HMAC_MAX_MD_CBLOCK);
173 dctx->key_length = sctx->key_length;
174 dctx->md = sctx->md;
175 return 1;
176 err:
177 return 0;
178 }
179
180void HMAC_CTX_cleanup(HMAC_CTX *ctx)
181 {
182 EVP_MD_CTX_cleanup(&ctx->i_ctx);
183 EVP_MD_CTX_cleanup(&ctx->o_ctx);
184 EVP_MD_CTX_cleanup(&ctx->md_ctx);
185 memset(ctx,0,sizeof *ctx);
186 }
187
188unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
189 const unsigned char *d, size_t n, unsigned char *md,
190 unsigned int *md_len)
191 {
192 HMAC_CTX c;
193 static unsigned char m[EVP_MAX_MD_SIZE];
194
195 if (md == NULL) md=m;
196 HMAC_CTX_init(&c);
197 if (!HMAC_Init(&c,key,key_len,evp_md))
198 goto err;
199 if (!HMAC_Update(&c,d,n))
200 goto err;
201 if (!HMAC_Final(&c,md,md_len))
202 goto err;
203 HMAC_CTX_cleanup(&c);
204 return md;
205 err:
206 return NULL;
207 }
208
209void HMAC_CTX_set_flags(HMAC_CTX *ctx, unsigned long flags)
210 {
211 EVP_MD_CTX_set_flags(&ctx->i_ctx, flags);
212 EVP_MD_CTX_set_flags(&ctx->o_ctx, flags);
213 EVP_MD_CTX_set_flags(&ctx->md_ctx, flags);
214 }
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