116 lines
3.8 KiB
C
116 lines
3.8 KiB
C
/* Wrap openssl crypto hash routines in gnulib interface. -*- coding: utf-8 -*-
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Copyright (C) 2013-2023 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Pádraig Brady */
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#ifndef GL_OPENSSL_NAME
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# error "Please define GL_OPENSSL_NAME to 1,5,256 etc."
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#endif
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#ifndef _GL_INLINE_HEADER_BEGIN
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# error "Please include config.h first."
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#endif
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_GL_INLINE_HEADER_BEGIN
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#ifndef GL_OPENSSL_INLINE
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# define GL_OPENSSL_INLINE _GL_INLINE
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#endif
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/* Concatenate two preprocessor tokens. */
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#define _GLCRYPTO_CONCAT_(prefix, suffix) prefix##suffix
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#define _GLCRYPTO_CONCAT(prefix, suffix) _GLCRYPTO_CONCAT_ (prefix, suffix)
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#if GL_OPENSSL_NAME == 5
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# define OPENSSL_ALG md5
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#else
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# define OPENSSL_ALG _GLCRYPTO_CONCAT (sha, GL_OPENSSL_NAME)
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#endif
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/* Context type mappings. */
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#if BASE_OPENSSL_TYPE != GL_OPENSSL_NAME
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# undef BASE_OPENSSL_TYPE
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# if GL_OPENSSL_NAME == 224
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# define BASE_OPENSSL_TYPE 256
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# elif GL_OPENSSL_NAME == 384
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# define BASE_OPENSSL_TYPE 512
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# endif
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# define md5_CTX MD5_CTX
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# define sha1_CTX SHA_CTX
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# define sha224_CTX SHA256_CTX
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# define sha224_ctx sha256_ctx
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# define sha256_CTX SHA256_CTX
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# define sha384_CTX SHA512_CTX
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# define sha384_ctx sha512_ctx
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# define sha512_CTX SHA512_CTX
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# undef _gl_CTX
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# undef _gl_ctx
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# define _gl_CTX _GLCRYPTO_CONCAT (OPENSSL_ALG, _CTX) /* openssl type. */
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# define _gl_ctx _GLCRYPTO_CONCAT (OPENSSL_ALG, _ctx) /* gnulib type. */
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struct _gl_ctx { _gl_CTX CTX; };
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#endif
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/* Function name mappings. */
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#define md5_prefix MD5
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#define sha1_prefix SHA1
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#define sha224_prefix SHA224
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#define sha256_prefix SHA256
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#define sha384_prefix SHA384
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#define sha512_prefix SHA512
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#define _GLCRYPTO_PREFIX _GLCRYPTO_CONCAT (OPENSSL_ALG, _prefix)
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#define OPENSSL_FN(suffix) _GLCRYPTO_CONCAT (_GLCRYPTO_PREFIX, suffix)
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#define GL_CRYPTO_FN(suffix) _GLCRYPTO_CONCAT (OPENSSL_ALG, suffix)
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GL_OPENSSL_INLINE void
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GL_CRYPTO_FN (_init_ctx) (struct _gl_ctx *ctx)
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{ (void) OPENSSL_FN (_Init) ((_gl_CTX *) ctx); }
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/* These were never exposed by gnulib. */
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#if ! (GL_OPENSSL_NAME == 224 || GL_OPENSSL_NAME == 384)
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GL_OPENSSL_INLINE void
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GL_CRYPTO_FN (_process_bytes) (const void *buf, size_t len, struct _gl_ctx *ctx)
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{ OPENSSL_FN (_Update) ((_gl_CTX *) ctx, buf, len); }
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GL_OPENSSL_INLINE void
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GL_CRYPTO_FN (_process_block) (const void *buf, size_t len, struct _gl_ctx *ctx)
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{ GL_CRYPTO_FN (_process_bytes) (buf, len, ctx); }
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#endif
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GL_OPENSSL_INLINE void *
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GL_CRYPTO_FN (_finish_ctx) (struct _gl_ctx *ctx, void *restrict res)
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{ OPENSSL_FN (_Final) ((unsigned char *) res, (_gl_CTX *) ctx); return res; }
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GL_OPENSSL_INLINE void *
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GL_CRYPTO_FN (_buffer) (const char *buf, size_t len, void *restrict res)
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{ return OPENSSL_FN () ((const unsigned char *) buf, len, (unsigned char *) res); }
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GL_OPENSSL_INLINE void *
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GL_CRYPTO_FN (_read_ctx) (const struct _gl_ctx *ctx, void *restrict res)
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{
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/* Assume any unprocessed bytes in ctx are not to be ignored. */
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_gl_CTX tmp_ctx = *(_gl_CTX *) ctx;
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OPENSSL_FN (_Final) ((unsigned char *) res, &tmp_ctx);
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return res;
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}
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/* Undef so we can include multiple times. */
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#undef GL_CRYPTO_FN
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#undef OPENSSL_FN
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#undef _GLCRYPTO_PREFIX
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#undef OPENSSL_ALG
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#undef GL_OPENSSL_NAME
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_GL_INLINE_HEADER_END
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