Add an enumerator for PKCS#7 contained certificates

src/libstrongswan/credentials/containers/pkcs7.h

@@ -48,6 +48,13 @@ struct pkcs7_t {
 	 */
 	bool (*get_attribute)(pkcs7_t *this, int oid, enumerator_t *enumerator,
 						  chunk_t *value);
+
+	/**
+	 * Create an enumerator over attached certificates.
+	 *
+	 * @return				enumerator over certificate_t
+	 */
+	enumerator_t* (*create_cert_enumerator)(pkcs7_t *this);
 };
 
 #endif /** PKCS7_H_ @}*/

src/libstrongswan/plugins/pkcs7/pkcs7_data.c

@@ -99,6 +99,7 @@ static private_pkcs7_data_t* create_empty()
 				.destroy = _destroy,
 			},
 			.get_attribute = (void*)return_false,
+			.create_cert_enumerator = (void*)enumerator_create_empty,
 		},
 	);
 

src/libstrongswan/plugins/pkcs7/pkcs7_enveloped_data.c

@@ -380,6 +380,7 @@ static private_pkcs7_enveloped_data_t* create_empty()
 				.get_encoding = _get_encoding,
 				.destroy = _destroy,
 			},
+			.create_cert_enumerator = (void*)enumerator_create_empty,
 			.get_attribute = (void*)return_false,
 		},
 	);

src/libstrongswan/plugins/pkcs7/pkcs7_signed_data.c

@@ -330,6 +330,13 @@ METHOD(pkcs7_t, get_attribute, bool,
 	return FALSE;
 }
 
+METHOD(pkcs7_t, create_cert_enumerator, enumerator_t*,
+	private_pkcs7_signed_data_t *this)
+{
+	return this->creds->set.create_cert_enumerator(&this->creds->set,
+											CERT_ANY, KEY_ANY, NULL, FALSE);
+}
+
 METHOD(container_t, get_data, bool,
 	private_pkcs7_signed_data_t *this, chunk_t *data)
 {
@@ -375,6 +382,7 @@ static private_pkcs7_signed_data_t* create_empty()
 				.destroy = _destroy,
 			},
 			.get_attribute = _get_attribute,
+			.create_cert_enumerator = _create_cert_enumerator,
 		},
 		.creds = mem_cred_create(),
 		.signerinfos = linked_list_create(),