Working on implementation.
FossilOrigin-Name: 57e7198be32db9a240bed881f3dc0760395637693673babb8e52b28189a7f639
This commit is contained in:
		@ -16,30 +16,122 @@
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*/
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#include <stdlib.h>
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#include <gnutls/gnutls.h>
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//#include <gnutls/dtls.h>
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#include "dtls_gnutls.h"
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#include "conn.h"
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#include "cw_log.h"
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struct gnutls_data{
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//	gnutls_session_t session;
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	//gnutls_certificate_credentials_t x509_cred;
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	int x;
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struct dtls_gnutls_data{
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	gnutls_session_t session;
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	gnutls_certificate_credentials_t x509_cred;
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	gnutls_priority_t priority_cache;
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};
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void dtls_gnutls_data_destroy(struct dtls_gnutls_data *d)
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{
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	free(d);
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}
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struct dtls_gnutls_data * dtls_gnutls_data_create(struct conn * conn)
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{
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	struct dtls_gnutls_data * d = malloc(sizeof(struct dtls_gnutls_data));
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	if (!d)
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		return 0;
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	gnutls_certificate_allocate_credentials(&d->x509_cred);
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  	int rc;
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	/* Set credentials */
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	rc  = gnutls_certificate_set_x509_key_file(d->x509_cred, conn->dtls_cert_file,
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                                                 conn->dtls_key_file,
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                                                 GNUTLS_X509_FMT_PEM);
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	if (rc<0){
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		cw_log(LOG_ERR,"DTLS - Can't set cert/key: %s",gnutls_strerror(rc));
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		dtls_gnutls_data_destroy(d);
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		return 0;
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	}
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	/* Set ciphers */
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	const char * errpos;
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	rc = 	gnutls_priority_init(&d->priority_cache,
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                             conn->dtls_cipher,
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                             &errpos);
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	if (rc<0){
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		cw_log(LOG_ERR,"DTLS - Can't init ciphers '%s' at '%s' : %s",conn->dtls_cipher,errpos,gnutls_strerror(rc));
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		dtls_gnutls_data_destroy(d);
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		return 0;
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	}
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	rc = gnutls_init(&d->session, GNUTLS_SERVER );
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	if (rc<0){
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		cw_log(LOG_ERR,"DTLS - Can't init session: %s",gnutls_strerror(rc));
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		dtls_gnutls_data_destroy(d);
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		return 0;
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	}
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	gnutls_transport_set_ptr(d->session,conn);
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	rc = gnutls_priority_set(d->session, d->priority_cache);
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	if (rc<0){
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		cw_log(LOG_ERR,"DTLS - Can't set priority: %s",gnutls_strerror(rc));
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		dtls_gnutls_data_destroy(d);
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		return 0;
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	}
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	rc = gnutls_credentials_set(d->session, GNUTLS_CRD_CERTIFICATE,
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                                       d->x509_cred);
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	if (rc<0){
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		cw_log(LOG_ERR,"DTLS - Can't set credentials: %s",gnutls_strerror(rc));
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		dtls_gnutls_data_destroy(d);
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		return 0;
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	}
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	gnutls_transport_set_pull_function(d->session,dtls_gnutls_bio_read);
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	gnutls_transport_set_push_function(d->session,dtls_gnutls_bio_write);
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	return d;	
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}
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int dtls_gnutls_accept(struct conn * conn)
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{
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	struct dtls_gnutls_data *d;
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	d = dtls_gnutls_data_create(conn);
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	if (!d)
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		return 0;
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	int rc;
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	do {
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		rc = gnutls_handshake(d->session);
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	}while(rc == GNUTLS_E_AGAIN);
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	cw_log(LOG_ERR,"DTLS - Can't set credentials: %s",gnutls_strerror(rc));
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   //    gnutls_certificate_allocate_credentials(&x509_cred);
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return 0;
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	return 1;	
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}
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