gsasl  1.10.0
About: GNU SASL is an implementation of the Simple Authentication and Security Layer (SASL). Development version.
  Fossies Dox: gsasl-1.10.0.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

gl_openssl.h
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1 /* Wrap openssl crypto hash routines in gnulib interface. -*- coding: utf-8 -*-
2 
3  Copyright (C) 2013-2021 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 Lesser General Public License as published by
7  the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
14 
15  You should have received a copy of the GNU Lesser General Public License
16  along with this program. If not, see <https://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 
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)
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 
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 *restrict res)
94 { OPENSSL_FN (_Final) ((unsigned char *) res, (_gl_CTX *) ctx); return res; }
95 
96 GL_OPENSSL_INLINE void *
97 GL_CRYPTO_FN (_buffer) (const char *buf, size_t len, void *restrict res)
98 { return OPENSSL_FN () ((const unsigned char *) buf, len, (unsigned char *) res); }
99 
100 GL_OPENSSL_INLINE void *
101 GL_CRYPTO_FN (_read_ctx) (const struct _gl_ctx *ctx, void *restrict 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) ((unsigned char *) 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
#define restrict
Definition: config.h:69
#define OPENSSL_FN(suffix)
Definition: gl_openssl.h:74
#define GL_OPENSSL_INLINE
Definition: gl_openssl.h:29
#define GL_CRYPTO_FN(suffix)
Definition: gl_openssl.h:75
int res
Definition: mbrtowc-impl.h:45
char buf[4]
Definition: mbrtowc-impl.h:39