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Added ssl_handshake_step() to allow single stepping the handshake

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process

Single stepping the handshake process allows for better support of
non-blocking network stacks and for getting information from specific
handshake messages if wanted.
This commit is contained in:
Paul Bakker 2013-01-25 14:49:24 +01:00
parent 9c94cddeae
commit 1961b709d8
5 changed files with 222 additions and 203 deletions
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30
library/ssl_tls.c
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@ -3513,24 +3513,42 @@ const int ssl_default_ciphersuites[] =
};
/*
* Perform the SSL handshake
* Perform a single step of the SSL handshake
*/
int ssl_handshake( ssl_context *ssl )
int ssl_handshake_step( ssl_context *ssl )
{
int ret = POLARSSL_ERR_SSL_FEATURE_UNAVAILABLE;
SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
#if defined(POLARSSL_SSL_CLI_C)
if( ssl->endpoint == SSL_IS_CLIENT )
ret = ssl_handshake_client( ssl );
ret = ssl_handshake_client_step( ssl );
#endif
#if defined(POLARSSL_SSL_SRV_C)
if( ssl->endpoint == SSL_IS_SERVER )
ret = ssl_handshake_server( ssl );
ret = ssl_handshake_server_step( ssl );
#endif
return( ret );
}
/*
* Perform the SSL handshake
*/
int ssl_handshake( ssl_context *ssl )
{
int ret = 0;
SSL_DEBUG_MSG( 2, ( "=> handshake" ) );
while( ssl->state != SSL_HANDSHAKE_OVER )
{
ret = ssl_handshake_step( ssl );
if( ret != 0 )
break;
}
SSL_DEBUG_MSG( 2, ( "<= handshake" ) );
return( ret );