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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 "streams/openssl.h"
#include "streams/openssl_legacy.h"
#include "runtime.h"
#include "git2/sys/openssl.h"
#if defined(GIT_OPENSSL) && !defined(GIT_OPENSSL_DYNAMIC)
# include <openssl/ssl.h>
# include <openssl/err.h>
# include <openssl/x509v3.h>
# include <openssl/bio.h>
#endif
#if defined(GIT_OPENSSL_LEGACY) || defined(GIT_OPENSSL_DYNAMIC)
/*
* OpenSSL 1.1 made BIO opaque so we have to use functions to interact with it
* which do not exist in previous versions. We define these inline functions so
* we can program against the interface instead of littering the implementation
* with ifdefs. We do the same for OPENSSL_init_ssl.
*/
int OPENSSL_init_ssl__legacy(uint64_t opts, const void *settings)
{
GIT_UNUSED(opts);
GIT_UNUSED(settings);
SSL_load_error_strings();
SSL_library_init();
return 0;
}
BIO_METHOD *BIO_meth_new__legacy(int type, const char *name)
{
BIO_METHOD *meth = git__calloc(1, sizeof(BIO_METHOD));
if (!meth) {
return NULL;
}
meth->type = type;
meth->name = name;
return meth;
}
void BIO_meth_free__legacy(BIO_METHOD *biom)
{
git__free(biom);
}
int BIO_meth_set_write__legacy(BIO_METHOD *biom, int (*write) (BIO *, const char *, int))
{
biom->bwrite = write;
return 1;
}
int BIO_meth_set_read__legacy(BIO_METHOD *biom, int (*read) (BIO *, char *, int))
{
biom->bread = read;
return 1;
}
int BIO_meth_set_puts__legacy(BIO_METHOD *biom, int (*puts) (BIO *, const char *))
{
biom->bputs = puts;
return 1;
}
int BIO_meth_set_gets__legacy(BIO_METHOD *biom, int (*gets) (BIO *, char *, int))
{
biom->bgets = gets;
return 1;
}
int BIO_meth_set_ctrl__legacy(BIO_METHOD *biom, long (*ctrl) (BIO *, int, long, void *))
{
biom->ctrl = ctrl;
return 1;
}
int BIO_meth_set_create__legacy(BIO_METHOD *biom, int (*create) (BIO *))
{
biom->create = create;
return 1;
}
int BIO_meth_set_destroy__legacy(BIO_METHOD *biom, int (*destroy) (BIO *))
{
biom->destroy = destroy;
return 1;
}
int BIO_get_new_index__legacy(void)
{
/* This exists as of 1.1 so before we'd just have 0 */
return 0;
}
void BIO_set_init__legacy(BIO *b, int init)
{
b->init = init;
}
void BIO_set_data__legacy(BIO *a, void *ptr)
{
a->ptr = ptr;
}
void *BIO_get_data__legacy(BIO *a)
{
return a->ptr;
}
const unsigned char *ASN1_STRING_get0_data__legacy(const ASN1_STRING *x)
{
return ASN1_STRING_data((ASN1_STRING *)x);
}
long SSL_CTX_set_options__legacy(SSL_CTX *ctx, long op)
{
return SSL_CTX_ctrl(ctx, SSL_CTRL_OPTIONS, op, NULL);
}
# if defined(GIT_THREADS)
static git_mutex *openssl_locks;
static void openssl_locking_function(int mode, int n, const char *file, int line)
{
int lock;
GIT_UNUSED(file);
GIT_UNUSED(line);
lock = mode & CRYPTO_LOCK;
if (lock)
(void)git_mutex_lock(&openssl_locks[n]);
else
git_mutex_unlock(&openssl_locks[n]);
}
static void shutdown_ssl_locking(void)
{
int num_locks, i;
num_locks = CRYPTO_num_locks();
CRYPTO_set_locking_callback(NULL);
for (i = 0; i < num_locks; ++i)
git_mutex_free(&openssl_locks[i]);
git__free(openssl_locks);
}
static void threadid_cb(CRYPTO_THREADID *threadid)
{
GIT_UNUSED(threadid);
CRYPTO_THREADID_set_numeric(threadid, git_thread_currentid());
}
int git_openssl_set_locking(void)
{
int num_locks, i;
#ifndef GIT_THREADS
git_error_set(GIT_ERROR_THREAD, "libgit2 was not built with threads");
return -1;
#endif
#ifdef GIT_OPENSSL_DYNAMIC
/*
* This function is required on legacy versions of OpenSSL; when building
* with dynamically-loaded OpenSSL, we detect whether we loaded it or not.
*/
if (!CRYPTO_set_locking_callback)
return 0;
#endif
CRYPTO_THREADID_set_callback(threadid_cb);
num_locks = CRYPTO_num_locks();
openssl_locks = git__calloc(num_locks, sizeof(git_mutex));
GIT_ERROR_CHECK_ALLOC(openssl_locks);
for (i = 0; i < num_locks; i++) {
if (git_mutex_init(&openssl_locks[i]) != 0) {
git_error_set(GIT_ERROR_SSL, "failed to initialize openssl locks");
return -1;
}
}
CRYPTO_set_locking_callback(openssl_locking_function);
return git_runtime_shutdown_register(shutdown_ssl_locking);
}
#endif /* GIT_THREADS */
#endif /* GIT_OPENSSL_LEGACY || GIT_OPENSSL_DYNAMIC */
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