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sslsym.c
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/
sslsym.c
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/*
* SSL symbols dynamic loader
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "squeezelite.h"
#if USE_SSL && !LINKALL && !NO_SSLSYM
#if WIN
#define dlclose FreeLibrary
#else
#include <dlfcn.h>
#endif
#include "openssl/ssl.h"
#include "openssl/err.h"
#include <openssl/rand.h>
#include <openssl/rsa.h>
#include <openssl/engine.h>
#include <openssl/aes.h>
#include <openssl/bio.h>
static void *SSLhandle = NULL;
static void *CRYPThandle = NULL;
#if WIN
static char *LIBSSL[] = { "libssl.dll",
"ssleay32.dll", NULL };
static char *LIBCRYPTO[] = { "libcrypto.dll",
"libeay32.dll", NULL };
#elif OSX
static char *LIBSSL[] = { "libssl.dylib", NULL };
static char *LIBCRYPTO[] = { "libcrypto.dylib", NULL };
#else
static char *LIBSSL[] = { "libssl.so",
"libssl.so.1.1",
"libssl.so.1.0.2",
"libssl.so.1.0.1",
"libssl.so.1.0.0", NULL };
static char *LIBCRYPTO[] = { "libcrypto.so",
"libcrypto.so.1.1",
"libcrypto.so.1.0.2",
"libcrypto.so.1.0.1",
"libcrypto.so.1.0.0", NULL };
#endif
#define P0() void
#define P1(t1, p1) t1 p1
#define P2(t1, p1, t2, p2) t1 p1, t2 p2
#define P3(t1, p1, t2, p2, t3, p3) t1 p1, t2 p2, t3 p3
#define P4(t1, p1, t2, p2, t3, p3, t4, p4) t1 p1, t2 p2, t3 p3, t4 p4
#define P5(t1, p1, t2, p2, t3, p3, t4, p4, t5, p5) t1 p1, t2 p2, t3 p3, t4 p4, t5 p5
#define P6(t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6) t1 p1, t2 p2, t3 p3, t4 p4, t5 p5, t6 p6
#define V0()
#define V1(t1, p1) p1
#define V2(t1, p1, t2, p2) p1, p2
#define V3(t1, p1, t2, p2, t3, p3) p1, p2, p3
#define V4(t1, p1, t2, p2, t3, p3, t4, p4) p1, p2, p3, p4
#define V5(t1, p1, t2, p2, t3, p3, t4, p4, t5, p5) p1, p2, p3, p4, p5
#define V6(t1, p1, t2, p2, t3, p3, t4, p4, t5, p5, t6, p6) p1, p2, p3, p4, p5, p6
#define P(n, ...) P##n(__VA_ARGS__)
#define V(n, ...) V##n(__VA_ARGS__)
#define SYM(fn) dlsym_##fn
#define SYMDECL(fn, ret, n, ...) \
static ret (*dlsym_##fn)(P(n,__VA_ARGS__)); \
ret fn(P(n,__VA_ARGS__)) { \
return (*dlsym_##fn)(V(n,__VA_ARGS__)); \
}
#define SYMDECLVOID(fn, n, ...) \
static void (*dlsym_##fn)(P(n,__VA_ARGS__)); \
void fn(P(n,__VA_ARGS__)) { \
(*dlsym_##fn)(V(n,__VA_ARGS__)); \
}
#define SYMLOAD(h, fn) dlsym_##fn = dlsym(h, #fn)
SYMDECL(SSL_read, int, 3, SSL*, s, void*, buf, int, len);
SYMDECL(SSL_write, int, 3, SSL*, s, const void*, buf, int, len);
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
SYMDECL(TLS_client_method, const SSL_METHOD*, 0);
SYMDECL(OPENSSL_init_ssl, int, 2, uint64_t, opts, const OPENSSL_INIT_SETTINGS*, settings);
#else
SYMDECL(SSLv23_client_method, const SSL_METHOD*, 0);
SYMDECL(SSL_library_init, int, 0);
#endif
SYMDECL(SSL_CTX_new, SSL_CTX*, 1, const SSL_METHOD *, meth);
SYMDECL(SSL_CTX_ctrl, long, 4, SSL_CTX *, ctx, int, cmd, long, larg, void*, parg);
#if (OPENSSL_VERSION_NUMBER >= 0x30000000L)
SYMDECL(SSL_CTX_set_options, uint64_t, 2, SSL_CTX*, ctx, uint64_t, op);
#elif (OPENSSL_VERSION_NUMBER >= 0x10100000L)
SYMDECL(SSL_CTX_set_options, unsigned long, 2, SSL_CTX*, ctx, unsigned long, op);
#endif
SYMDECL(SSL_new, SSL*, 1, SSL_CTX*, s);
SYMDECL(SSL_connect, int, 1, SSL*, s);
SYMDECL(SSL_shutdown, int, 1, SSL*, s);
SYMDECL(SSL_get_fd, int, 1, const SSL*, s);
SYMDECL(SSL_set_fd, int, 2, SSL*, s, int, fd);
SYMDECL(SSL_get_error, int, 2, const SSL*, s, int, ret_code);
SYMDECL(SSL_ctrl, long, 4, SSL*, ssl, int, cmd, long, larg, void*, parg);
SYMDECL(SSL_pending, int, 1, const SSL*, s);
SYMDECLVOID(SSL_free, 1, SSL*, s);
SYMDECLVOID(SSL_CTX_free, 1, SSL_CTX *, ctx);
SYMDECL(ERR_get_error, unsigned long, 0);
SYMDECLVOID(ERR_clear_error, 0);
static void *dlopen_try(char **filenames, int flag) {
void *handle;
for (handle = NULL; !handle && *filenames; filenames++) handle = dlopen(*filenames, flag);
return handle;
}
bool load_ssl_symbols(void) {
CRYPThandle = dlopen_try(LIBCRYPTO, RTLD_NOW);
SSLhandle = dlopen_try(LIBSSL, RTLD_NOW);
if (!SSLhandle || !CRYPThandle) {
free_ssl_symbols();
return false;
}
SYMLOAD(SSLhandle, SSL_CTX_new);
SYMLOAD(SSLhandle, SSL_CTX_ctrl);
SYMLOAD(SSLhandle, SSL_CTX_free);
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
SYMLOAD(SSLhandle, SSL_CTX_set_options);
#endif
SYMLOAD(SSLhandle, SSL_ctrl);
SYMLOAD(SSLhandle, SSL_free);
SYMLOAD(SSLhandle, SSL_new);
SYMLOAD(SSLhandle, SSL_connect);
SYMLOAD(SSLhandle, SSL_get_fd);
SYMLOAD(SSLhandle, SSL_set_fd);
SYMLOAD(SSLhandle, SSL_get_error);
SYMLOAD(SSLhandle, SSL_shutdown);
SYMLOAD(SSLhandle, SSL_read);
SYMLOAD(SSLhandle, SSL_write);
SYMLOAD(SSLhandle, SSL_pending);
#if (OPENSSL_VERSION_NUMBER >= 0x10100000L)
SYMLOAD(SSLhandle, TLS_client_method);
SYMLOAD(SSLhandle, OPENSSL_init_ssl);
#else
SYMLOAD(SSLhandle, SSLv23_client_method);
SYMLOAD(SSLhandle, SSL_library_init);
#endif
SYMLOAD(CRYPThandle, ERR_clear_error);
SYMLOAD(CRYPThandle, ERR_get_error);
return true;
}
void free_ssl_symbols(void) {
if (SSLhandle) dlclose(SSLhandle);
if (CRYPThandle) dlclose(CRYPThandle);
}
#endif