|
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 /* |
|
59 © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
|
60 */ |
|
61 |
|
62 #include <stdio.h> |
|
63 #include <stdlib.h> |
|
64 #include <string.h> |
|
65 #include "cryptlib.h" |
|
66 #include <openssl/hmac.h> |
|
67 #ifdef SYMBIAN |
|
68 #include <errno.h> |
|
69 #endif |
|
70 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__))) |
|
71 #include "libcrypto_wsd_macros.h" |
|
72 #include "libcrypto_wsd.h" |
|
73 #endif |
|
74 |
|
75 |
|
76 EXPORT_C void HMAC_Init_ex(HMAC_CTX *ctx, const void *key, int len, |
|
77 const EVP_MD *md, ENGINE *impl) |
|
78 { |
|
79 int i,j,reset=0; |
|
80 unsigned char pad[HMAC_MAX_MD_CBLOCK]; |
|
81 |
|
82 if (md != NULL) |
|
83 { |
|
84 reset=1; |
|
85 ctx->md=md; |
|
86 } |
|
87 else |
|
88 md=ctx->md; |
|
89 |
|
90 if (key != NULL) |
|
91 { |
|
92 reset=1; |
|
93 j=EVP_MD_block_size(md); |
|
94 OPENSSL_assert(j <= (int)sizeof(ctx->key)); |
|
95 if (j < len) |
|
96 { |
|
97 EVP_DigestInit_ex(&ctx->md_ctx,md, impl); |
|
98 EVP_DigestUpdate(&ctx->md_ctx,key,len); |
|
99 EVP_DigestFinal_ex(&(ctx->md_ctx),ctx->key, |
|
100 &ctx->key_length); |
|
101 } |
|
102 else |
|
103 { |
|
104 OPENSSL_assert(len>=0 && len<=(int)sizeof(ctx->key)); |
|
105 memcpy(ctx->key,key,len); |
|
106 ctx->key_length=len; |
|
107 } |
|
108 if(ctx->key_length != HMAC_MAX_MD_CBLOCK) |
|
109 memset(&ctx->key[ctx->key_length], 0, |
|
110 HMAC_MAX_MD_CBLOCK - ctx->key_length); |
|
111 } |
|
112 |
|
113 if (reset) |
|
114 { |
|
115 for (i=0; i<HMAC_MAX_MD_CBLOCK; i++) |
|
116 pad[i]=0x36^ctx->key[i]; |
|
117 EVP_DigestInit_ex(&ctx->i_ctx,md, impl); |
|
118 EVP_DigestUpdate(&ctx->i_ctx,pad,EVP_MD_block_size(md)); |
|
119 |
|
120 for (i=0; i<HMAC_MAX_MD_CBLOCK; i++) |
|
121 pad[i]=0x5c^ctx->key[i]; |
|
122 EVP_DigestInit_ex(&ctx->o_ctx,md, impl); |
|
123 EVP_DigestUpdate(&ctx->o_ctx,pad,EVP_MD_block_size(md)); |
|
124 } |
|
125 EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->i_ctx); |
|
126 } |
|
127 |
|
128 EXPORT_C void HMAC_Init(HMAC_CTX *ctx, const void *key, int len, |
|
129 const EVP_MD *md) |
|
130 { |
|
131 if(key && md) |
|
132 HMAC_CTX_init(ctx); |
|
133 HMAC_Init_ex(ctx,key,len,md, NULL); |
|
134 } |
|
135 |
|
136 EXPORT_C void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, size_t len) |
|
137 { |
|
138 EVP_DigestUpdate(&ctx->md_ctx,data,len); |
|
139 } |
|
140 |
|
141 EXPORT_C void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len) |
|
142 { |
|
143 int j; |
|
144 unsigned int i; |
|
145 unsigned char buf[EVP_MAX_MD_SIZE]; |
|
146 |
|
147 j=EVP_MD_block_size(ctx->md); |
|
148 |
|
149 EVP_DigestFinal_ex(&ctx->md_ctx,buf,&i); |
|
150 EVP_MD_CTX_copy_ex(&ctx->md_ctx,&ctx->o_ctx); |
|
151 EVP_DigestUpdate(&ctx->md_ctx,buf,i); |
|
152 EVP_DigestFinal_ex(&ctx->md_ctx,md,len); |
|
153 } |
|
154 |
|
155 EXPORT_C void HMAC_CTX_init(HMAC_CTX *ctx) |
|
156 { |
|
157 EVP_MD_CTX_init(&ctx->i_ctx); |
|
158 EVP_MD_CTX_init(&ctx->o_ctx); |
|
159 EVP_MD_CTX_init(&ctx->md_ctx); |
|
160 } |
|
161 |
|
162 EXPORT_C void HMAC_CTX_cleanup(HMAC_CTX *ctx) |
|
163 { |
|
164 EVP_MD_CTX_cleanup(&ctx->i_ctx); |
|
165 EVP_MD_CTX_cleanup(&ctx->o_ctx); |
|
166 EVP_MD_CTX_cleanup(&ctx->md_ctx); |
|
167 memset(ctx,0,sizeof *ctx); |
|
168 } |
|
169 |
|
170 #ifdef EMULATOR |
|
171 GET_STATIC_ARRAY_FROM_TLS(m,hmac,unsigned char) |
|
172 #define m (GET_WSD_VAR_NAME(m,hmac, s)()) |
|
173 #endif |
|
174 |
|
175 EXPORT_C unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len, |
|
176 const unsigned char *d, size_t n, unsigned char *md, |
|
177 unsigned int *md_len) |
|
178 { |
|
179 HMAC_CTX c; |
|
180 #ifdef SYMBIAN |
|
181 int save_errno=0; |
|
182 #endif |
|
183 #ifndef EMULATOR |
|
184 static unsigned char m[EVP_MAX_MD_SIZE]; |
|
185 #endif |
|
186 #ifdef SYMBIAN |
|
187 save_errno=errno; //save errno.. |
|
188 errno = 0; //clear it for now |
|
189 #endif |
|
190 if (md == NULL) md=m; |
|
191 HMAC_CTX_init(&c); |
|
192 HMAC_Init(&c,key,key_len,evp_md); |
|
193 #ifdef SYMBIAN |
|
194 if(errno==ENOMEM) |
|
195 { |
|
196 return md; |
|
197 } |
|
198 #endif |
|
199 HMAC_Update(&c,d,n); |
|
200 #ifdef SYMBIAN |
|
201 if(errno==ENOMEM) |
|
202 { |
|
203 return md; |
|
204 } |
|
205 #endif |
|
206 HMAC_Final(&c,md,md_len); |
|
207 HMAC_CTX_cleanup(&c); |
|
208 #ifdef SYMBIAN |
|
209 if(errno==0) |
|
210 errno = save_errno; //reset back errno to what it was prreviously only if it has not changed now |
|
211 #endif |
|
212 return(md); |
|
213 } |
|
214 |