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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "openssl.h"
#ifdef GIT_OPENSSL_DYNAMIC
# include <dlfcn.h>
static int handle_count;
static void *openssl_handle;
static int git_hash_openssl_global_shutdown(void)
{
if (--handle_count == 0) {
dlclose(openssl_handle);
openssl_handle = NULL;
}
return 0;
}
static int git_hash_openssl_global_init(void)
{
if (!handle_count) {
if ((openssl_handle = dlopen("libssl.so.1.1", RTLD_NOW)) == NULL &&
(openssl_handle = dlopen("libssl.1.1.dylib", RTLD_NOW)) == NULL &&
(openssl_handle = dlopen("libssl.so.1.0.0", RTLD_NOW)) == NULL &&
(openssl_handle = dlopen("libssl.1.0.0.dylib", RTLD_NOW)) == NULL &&
(openssl_handle = dlopen("libssl.so.10", RTLD_NOW)) == NULL &&
(openssl_handle = dlopen("libssl.so.3", RTLD_NOW)) == NULL) {
git_error_set(GIT_ERROR_SSL, "could not load ssl libraries");
return -1;
}
}
if (git_hash_openssl_global_shutdown() < 0)
return -1;
handle_count++;
return 0;
}
#endif
#ifdef GIT_SHA1_OPENSSL
# ifdef GIT_OPENSSL_DYNAMIC
static int (*SHA1_Init)(SHA_CTX *c);
static int (*SHA1_Update)(SHA_CTX *c, const void *data, size_t len);
static int (*SHA1_Final)(unsigned char *md, SHA_CTX *c);
# endif
int git_hash_sha1_global_init(void)
{
#ifdef GIT_OPENSSL_DYNAMIC
if (git_hash_openssl_global_init() < 0)
return -1;
if ((SHA1_Init = dlsym(openssl_handle, "SHA1_Init")) == NULL ||
(SHA1_Update = dlsym(openssl_handle, "SHA1_Update")) == NULL ||
(SHA1_Final = dlsym(openssl_handle, "SHA1_Final")) == NULL) {
const char *msg = dlerror();
git_error_set(GIT_ERROR_SSL, "could not load hash function: %s", msg ? msg : "unknown error");
return -1;
}
#endif
return 0;
}
int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)
{
return git_hash_sha1_init(ctx);
}
void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)
{
GIT_UNUSED(ctx);
}
int git_hash_sha1_init(git_hash_sha1_ctx *ctx)
{
GIT_ASSERT_ARG(ctx);
if (SHA1_Init(&ctx->c) != 1) {
git_error_set(GIT_ERROR_SHA, "failed to initialize sha1 context");
return -1;
}
return 0;
}
int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *data, size_t len)
{
GIT_ASSERT_ARG(ctx);
if (SHA1_Update(&ctx->c, data, len) != 1) {
git_error_set(GIT_ERROR_SHA, "failed to update sha1");
return -1;
}
return 0;
}
int git_hash_sha1_final(unsigned char *out, git_hash_sha1_ctx *ctx)
{
GIT_ASSERT_ARG(ctx);
if (SHA1_Final(out, &ctx->c) != 1) {
git_error_set(GIT_ERROR_SHA, "failed to finalize sha1");
return -1;
}
return 0;
}
#endif
#ifdef GIT_SHA256_OPENSSL
# ifdef GIT_OPENSSL_DYNAMIC
static int (*SHA256_Init)(SHA256_CTX *c);
static int (*SHA256_Update)(SHA256_CTX *c, const void *data, size_t len);
static int (*SHA256_Final)(unsigned char *md, SHA256_CTX *c);
#endif
int git_hash_sha256_global_init(void)
{
#ifdef GIT_OPENSSL_DYNAMIC
if (git_hash_openssl_global_init() < 0)
return -1;
if ((SHA256_Init = dlsym(openssl_handle, "SHA256_Init")) == NULL ||
(SHA256_Update = dlsym(openssl_handle, "SHA256_Update")) == NULL ||
(SHA256_Final = dlsym(openssl_handle, "SHA256_Final")) == NULL) {
const char *msg = dlerror();
git_error_set(GIT_ERROR_SSL, "could not load hash function: %s", msg ? msg : "unknown error");
return -1;
}
#endif
return 0;
}
int git_hash_sha256_ctx_init(git_hash_sha256_ctx *ctx)
{
return git_hash_sha256_init(ctx);
}
void git_hash_sha256_ctx_cleanup(git_hash_sha256_ctx *ctx)
{
GIT_UNUSED(ctx);
}
int git_hash_sha256_init(git_hash_sha256_ctx *ctx)
{
GIT_ASSERT_ARG(ctx);
if (SHA256_Init(&ctx->c) != 1) {
git_error_set(GIT_ERROR_SHA, "failed to initialize sha256 context");
return -1;
}
return 0;
}
int git_hash_sha256_update(git_hash_sha256_ctx *ctx, const void *data, size_t len)
{
GIT_ASSERT_ARG(ctx);
if (SHA256_Update(&ctx->c, data, len) != 1) {
git_error_set(GIT_ERROR_SHA, "failed to update sha256");
return -1;
}
return 0;
}
int git_hash_sha256_final(unsigned char *out, git_hash_sha256_ctx *ctx)
{
GIT_ASSERT_ARG(ctx);
if (SHA256_Final(out, &ctx->c) != 1) {
git_error_set(GIT_ERROR_SHA, "failed to finalize sha256");
return -1;
}
return 0;
}
#endif
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