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Extract generate client random to a function

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Manuel Pégourié-Gonnard 2014-07-22 15:53:27 +02:00 committed by Paul Bakker
parent 2c9ee81f6e
commit b760f001d7
1 changed files with 39 additions and 24 deletions
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63
library/ssl_cli.c
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@ -444,6 +444,38 @@ static void ssl_write_alpn_ext( ssl_context *ssl,
}
#endif /* POLARSSL_SSL_ALPN */
/*
* Generate random bytes for ClientHello
*/
static int ssl_generate_random( ssl_context *ssl )
{
int ret;
unsigned char *p = ssl->handshake->randbytes;
#if defined(POLARSSL_HAVE_TIME)
time_t t;
#endif
#if defined(POLARSSL_HAVE_TIME)
t = time( NULL );
*p++ = (unsigned char)( t >> 24 );
*p++ = (unsigned char)( t >> 16 );
*p++ = (unsigned char)( t >> 8 );
*p++ = (unsigned char)( t );
SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
#else
if( ( ret = ssl->f_rng( ssl->p_rng, p, 4 ) ) != 0 )
return( ret );
p += 4;
#endif /* POLARSSL_HAVE_TIME */
if( ( ret = ssl->f_rng( ssl->p_rng, p, 28 ) ) != 0 )
return( ret );
return( 0 );
}
static int ssl_write_client_hello( ssl_context *ssl )
{
int ret;
@ -451,9 +483,6 @@ static int ssl_write_client_hello( ssl_context *ssl )
unsigned char *buf;
unsigned char *p, *q;
unsigned char offer_compress;
#if defined(POLARSSL_HAVE_TIME)
time_t t;
#endif
const int *ciphersuites;
const ssl_ciphersuite_t *ciphersuite_info;
@ -494,29 +523,15 @@ static int ssl_write_client_hello( ssl_context *ssl )
SSL_DEBUG_MSG( 3, ( "client hello, max version: [%d:%d]",
buf[4], buf[5] ) );
#if defined(POLARSSL_HAVE_TIME)
t = time( NULL );
*p++ = (unsigned char)( t >> 24 );
*p++ = (unsigned char)( t >> 16 );
*p++ = (unsigned char)( t >> 8 );
*p++ = (unsigned char)( t );
SSL_DEBUG_MSG( 3, ( "client hello, current time: %lu", t ) );
#else
if( ( ret = ssl->f_rng( ssl->p_rng, p, 4 ) ) != 0 )
if( ( ret = ssl_generate_random( ssl ) ) != 0 )
{
SSL_DEBUG_RET( 1, "ssl_generate_random", ret );
return( ret );
}
p += 4;
#endif /* POLARSSL_HAVE_TIME */
if( ( ret = ssl->f_rng( ssl->p_rng, p, 28 ) ) != 0 )
return( ret );
p += 28;
memcpy( ssl->handshake->randbytes, buf + 6, 32 );
SSL_DEBUG_BUF( 3, "client hello, random bytes", buf + 6, 32 );
memcpy( p, ssl->handshake->randbytes, 32 );
SSL_DEBUG_BUF( 3, "client hello, random bytes", p, 32 );
p += 32;
/*
* 38 . 38 session id length