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e9551b12 PE |
1 | /* gl_openssl.h -- wrap openssl crypto hash routines in gnulib interface |
2 | ||
3 | Copyright (C) 2013 Free Software Foundation, Inc. | |
4 | ||
5 | This program is free software: you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | /* Written by Pádraig Brady */ | |
19 | ||
20 | #ifndef GL_OPENSSL_NAME | |
21 | # error "Please define GL_OPENSSL_NAME to 1,5,256 etc." | |
22 | #endif | |
23 | ||
24 | #ifndef _GL_INLINE_HEADER_BEGIN | |
25 | # error "Please include config.h first." | |
26 | #endif | |
27 | _GL_INLINE_HEADER_BEGIN | |
28 | #ifndef GL_OPENSSL_INLINE | |
29 | # define GL_OPENSSL_INLINE _GL_INLINE | |
30 | #endif | |
31 | ||
32 | /* Concatenate two preprocessor tokens. */ | |
33 | #define _GLCRYPTO_CONCAT_(prefix, suffix) prefix##suffix | |
34 | #define _GLCRYPTO_CONCAT(prefix, suffix) _GLCRYPTO_CONCAT_ (prefix, suffix) | |
35 | ||
36 | #if GL_OPENSSL_NAME == 5 | |
37 | # define OPENSSL_ALG md5 | |
38 | #else | |
39 | # define OPENSSL_ALG _GLCRYPTO_CONCAT (sha, GL_OPENSSL_NAME) | |
40 | #endif | |
41 | ||
42 | /* Context type mappings. */ | |
43 | #if BASE_OPENSSL_TYPE != GL_OPENSSL_NAME | |
44 | # undef BASE_OPENSSL_TYPE | |
45 | # if GL_OPENSSL_NAME == 224 | |
46 | # define BASE_OPENSSL_TYPE 256 | |
47 | # elif GL_OPENSSL_NAME == 384 | |
48 | # define BASE_OPENSSL_TYPE 512 | |
49 | # endif | |
50 | # define md5_CTX MD5_CTX | |
51 | # define sha1_CTX SHA_CTX | |
52 | # define sha224_CTX SHA256_CTX | |
53 | # define sha224_ctx sha256_ctx | |
54 | # define sha256_CTX SHA256_CTX | |
55 | # define sha384_CTX SHA512_CTX | |
56 | # define sha384_ctx sha512_ctx | |
57 | # define sha512_CTX SHA512_CTX | |
58 | # undef _gl_CTX | |
59 | # undef _gl_ctx | |
60 | # define _gl_CTX _GLCRYPTO_CONCAT (OPENSSL_ALG, _CTX) /* openssl type. */ | |
61 | # define _gl_ctx _GLCRYPTO_CONCAT (OPENSSL_ALG, _ctx) /* gnulib type. */ | |
62 | ||
63 | struct _gl_ctx { _gl_CTX CTX; }; | |
64 | #endif | |
65 | ||
66 | /* Function name mappings. */ | |
67 | #define md5_prefix MD5 | |
68 | #define sha1_prefix SHA1 | |
69 | #define sha224_prefix SHA224 | |
70 | #define sha256_prefix SHA256 | |
71 | #define sha384_prefix SHA384 | |
72 | #define sha512_prefix SHA512 | |
73 | #define _GLCRYPTO_PREFIX _GLCRYPTO_CONCAT (OPENSSL_ALG, _prefix) | |
74 | #define OPENSSL_FN(suffix) _GLCRYPTO_CONCAT (_GLCRYPTO_PREFIX, suffix) | |
75 | #define GL_CRYPTO_FN(suffix) _GLCRYPTO_CONCAT (OPENSSL_ALG, suffix) | |
76 | ||
77 | GL_OPENSSL_INLINE void | |
78 | GL_CRYPTO_FN (_init_ctx) (struct _gl_ctx *ctx) | |
79 | { (void) OPENSSL_FN (_Init) ((_gl_CTX *) ctx); } | |
80 | ||
81 | /* These were never exposed by gnulib. */ | |
82 | #if ! (GL_OPENSSL_NAME == 224 || GL_OPENSSL_NAME == 384) | |
83 | GL_OPENSSL_INLINE void | |
84 | GL_CRYPTO_FN (_process_bytes) (const void *buf, size_t len, struct _gl_ctx *ctx) | |
85 | { OPENSSL_FN (_Update) ((_gl_CTX *) ctx, buf, len); } | |
86 | ||
87 | GL_OPENSSL_INLINE void | |
88 | GL_CRYPTO_FN (_process_block) (const void *buf, size_t len, struct _gl_ctx *ctx) | |
89 | { GL_CRYPTO_FN (_process_bytes) (buf, len, ctx); } | |
90 | #endif | |
91 | ||
92 | GL_OPENSSL_INLINE void * | |
93 | GL_CRYPTO_FN (_finish_ctx) (struct _gl_ctx *ctx, void *res) | |
94 | { OPENSSL_FN (_Final) (res, (_gl_CTX *) ctx); return res; } | |
95 | ||
96 | GL_OPENSSL_INLINE void * | |
97 | GL_CRYPTO_FN (_buffer) (const char *buf, size_t len, void *res) | |
98 | { return OPENSSL_FN () ((const unsigned char *) buf, len, res); } | |
99 | ||
100 | GL_OPENSSL_INLINE void * | |
101 | GL_CRYPTO_FN (_read_ctx) (const struct _gl_ctx *ctx, void *res) | |
102 | { | |
103 | /* Assume any unprocessed bytes in ctx are not to be ignored. */ | |
104 | _gl_CTX tmp_ctx = *(_gl_CTX *) ctx; | |
105 | OPENSSL_FN (_Final) (res, &tmp_ctx); | |
106 | return res; | |
107 | } | |
108 | ||
109 | /* Undef so we can include multiple times. */ | |
110 | #undef GL_CRYPTO_FN | |
111 | #undef OPENSSL_FN | |
112 | #undef _GLCRYPTO_PREFIX | |
113 | #undef OPENSSL_ALG | |
114 | #undef GL_OPENSSL_NAME | |
115 | ||
116 | _GL_INLINE_HEADER_END |