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40 lines
1.5 KiB
C
40 lines
1.5 KiB
C
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#ifndef _SSL_PARSE_RENEGOTIATION_INFO_H
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#define _SSL_PARSE_RENEGOTIATION_INFO_H
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static int ssl_parse_renegotiation_info( mbedtls_ssl_context *ssl,
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const unsigned char *buf,
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size_t len )
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{
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#if defined(MBEDTLS_SSL_RENEGOTIATION)
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if( ssl->renego_status != MBEDTLS_SSL_INITIAL_HANDSHAKE )
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{
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/* Check verify-data in constant-time. The length OTOH is no secret */
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if( len != 1 + ssl->verify_data_len ||
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buf[0] != ssl->verify_data_len ||
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mbedtls_ssl_safer_memcmp( buf + 1, ssl->peer_verify_data,
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ssl->verify_data_len ) != 0 )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-matching renegotiation info" ) );
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mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
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MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
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return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
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}
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}
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else
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#endif /* MBEDTLS_SSL_RENEGOTIATION */
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{
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if( len != 1 || buf[0] != 0x0 )
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{
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MBEDTLS_SSL_DEBUG_MSG( 1, ( "non-zero length renegotiation info" ) );
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mbedtls_ssl_send_alert_message( ssl, MBEDTLS_SSL_ALERT_LEVEL_FATAL,
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MBEDTLS_SSL_ALERT_MSG_HANDSHAKE_FAILURE );
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return( MBEDTLS_ERR_SSL_BAD_HS_CLIENT_HELLO );
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}
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ssl->secure_renegotiation = MBEDTLS_SSL_SECURE_RENEGOTIATION;
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}
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return( 0 );
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}
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#endif
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