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/* The GPL applies to this program.
In addition, as a special exception, the copyright holders give
permission to link the code of portions of this program with the
OpenSSL library under certain conditions as described in each
individual source file, and distribute linked combinations
including the two.
You must obey the GNU General Public License in all respects
for all of the code used other than OpenSSL. If you modify
file(s) with this exception, you may extend this exception to your
version of the file(s), but you are not obligated to do so. If you
do not wish to do so, delete this exception statement from your
version. If you delete this exception statement from all source
files in the program, then also delete it here.
*/
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <openssl/ssl.h>
#include <openssl/bio.h>
#include <openssl/evp.h>
#include <openssl/x509.h>
#include <openssl/md5.h>
#include "mssl.h"
extern char last_error[];
BIO *bio_err=0;
char close_ssl_connection(SSL *ssl_h, int socket_h)
{
int rc = SSL_shutdown(ssl_h);
if (!rc)
{
shutdown(socket_h, 1);
rc = SSL_shutdown(ssl_h);
}
/* rc == 0 means try again but it seems to be fine
* to ignore that is what I read from the manpage
*/
if (rc == -1)
return -1;
else
return 0;
}
int READ_SSL(SSL *ssl_h, char *whereto, int len)
{
int cnt=len;
while(len>0)
{
int rc;
rc = SSL_read(ssl_h, whereto, len);
if (rc == -1)
{
if (errno != EINTR && errno != EAGAIN)
{
sprintf(last_error, "READ_SSL: io-error: %s\n", strerror(errno));
return -1;
}
}
else if (rc == 0)
{
return 0;
}
else
{
whereto += rc;
len -= rc;
}
}
return cnt;
}
int WRITE_SSL(SSL *ssl_h, char *whereto, int len)
{
int cnt=len;
while(len>0)
{
int rc;
rc = SSL_write(ssl_h, whereto, len);
if (rc == -1)
{
if (errno != EINTR && errno != EAGAIN)
{
sprintf(last_error, "WRITE_SSL: io-error: %s\n", strerror(errno));
return -1;
}
}
else if (rc == 0)
{
return 0;
}
else
{
whereto += rc;
len -= rc;
}
}
return cnt;
}
int connect_ssl(int socket_h, SSL_CTX *client_ctx, SSL **ssl_h, BIO **s_bio, int timeout)
{
int dummy;
#if 0
int rc;
struct timeval to;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(socket_h, &rfds);
to.tv_sec = timeout / 1000;
to.tv_usec = (timeout - (to.tv_sec * 1000)) * 1000;
/* wait for connection */
rc = select(socket_h + 1, &rfds, NULL, NULL, &to);
if (rc == 0)
return -2; /* timeout */
else if (rc == -1)
{
if (errno == EINTR)
return -3; /* ^C pressed */
else
return -1; /* error */
}
#endif
*ssl_h = SSL_new(client_ctx);
*s_bio = BIO_new_socket(socket_h, BIO_NOCLOSE);
SSL_set_bio(*ssl_h, *s_bio, *s_bio);
dummy = SSL_connect(*ssl_h);
if (dummy <= 0)
{
sprintf(last_error, "problem starting SSL connection: %d\n", SSL_get_error(*ssl_h, dummy));
return -1;
}
return 0;
}
SSL_CTX * initialize_ctx(void)
{
SSL_METHOD *meth;
if (!bio_err)
{
SSL_library_init();
SSL_load_error_strings();
/* error write context */
bio_err = BIO_new_fp(stderr, BIO_NOCLOSE);
}
/* create context */
meth = SSLv23_method();
return SSL_CTX_new(meth);
}
char * get_fingerprint(SSL *ssl_h)
{
char *string = NULL;
unsigned char fp_digest[EVP_MAX_MD_SIZE];
X509 *x509_data = SSL_get_peer_certificate(ssl_h);
if (x509_data)
{
unsigned int fp_digest_size = sizeof(fp_digest);
memset(fp_digest, 0x00, sizeof(fp_digest));
if (X509_digest(x509_data, EVP_md5(), fp_digest, &fp_digest_size))
{
string = (char *)malloc(MD5_DIGEST_LENGTH * 3 + 1);
if (string)
{
int loop, pos =0;
for(loop=0; loop<MD5_DIGEST_LENGTH; loop++)
{
if (loop)
pos += sprintf(&string[pos], ":%02x", fp_digest[loop]);
else
pos = sprintf(&string[pos], "%02x", fp_digest[loop]);
}
}
}
X509_free(x509_data);
}
return string;
}
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