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-rw-r--r--gl/gl_openssl.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/gl/gl_openssl.h b/gl/gl_openssl.h
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1/* Wrap openssl crypto hash routines in gnulib interface. -*- coding: utf-8 -*-
2
3 Copyright (C) 2013-2023 Free Software Foundation, Inc.
4
5 This file is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation; either version 2.1 of the
8 License, or (at your option) any later version.
9
10 This file 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
63struct _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
77GL_OPENSSL_INLINE void
78GL_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)
83GL_OPENSSL_INLINE void
84GL_CRYPTO_FN (_process_bytes) (const void *buf, size_t len, struct _gl_ctx *ctx)
85{ OPENSSL_FN (_Update) ((_gl_CTX *) ctx, buf, len); }
86
87GL_OPENSSL_INLINE void
88GL_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
92GL_OPENSSL_INLINE void *
93GL_CRYPTO_FN (_finish_ctx) (struct _gl_ctx *ctx, void *restrict res)
94{ OPENSSL_FN (_Final) ((unsigned char *) res, (_gl_CTX *) ctx); return res; }
95
96GL_OPENSSL_INLINE void *
97GL_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
100GL_OPENSSL_INLINE void *
101GL_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