added create_certificate_iterator() method

src/libstrongswan/crypto/pkcs7.c

@@ -618,12 +618,20 @@ static chunk_t get_data(private_pkcs7_t *this)
 	return this->data;
 }
 
+/**
+ * Implements pkcs_t.create_crluri_iterator
+ */
+static iterator_t *create_certificate_iterator(const private_pkcs7_t *this)
+{
+	return this->certs->create_iterator(this->certs, TRUE);
+}
+
 /**
  * Implements pkcs7_t.destroy
  */
 static void destroy(private_pkcs7_t *this)
 {
-	this->certs->destroy(this->certs);
+	this->certs->destroy_offset(this->certs, offsetof(x509_t, destroy));
 	free(this->data.ptr);
 	free(this);
 }
@@ -690,6 +698,7 @@ pkcs7_t *pkcs7_create_from_chunk(chunk_t chunk, u_int level)
 	this->public.parse_signedData = (bool (*) (pkcs7_t*,x509_t*))parse_signedData;
 	this->public.parse_envelopedData = (bool (*) (pkcs7_t*,chunk_t,rsa_private_key_t*))parse_envelopedData;
 	this->public.get_data = (chunk_t (*) (pkcs7_t*))get_data;
+	this->public.create_certificate_iterator = (iterator_t* (*) (pkcs7_t*))create_certificate_iterator;
 	this->public.destroy = (void (*) (pkcs7_t*))destroy;
 
 	if (!parse_contentInfo(chunk, level, this))

src/libstrongswan/crypto/pkcs7.h

@@ -32,12 +32,10 @@ typedef struct pkcs7_t pkcs7_t;
 #include <library.h>
 #include <crypto/x509.h>
 #include <crypto/rsa/rsa_private_key.h>
-
+#include <utils/iterator.h>
-/* Access structure for a PKCS#7 ContentInfo object */
-
 
 /**
- * @brief PKCS#7 ContentInfo object.
+ * @brief PKCS#7 contentInfo object.
  * 
  * @b Constructors:
  *  -pkcs7_create_from_chunk()
@@ -104,6 +102,14 @@ struct pkcs7_t {
 	 */
 	chunk_t (*get_data) (pkcs7_t *this);
 
+	/**
+	 * @brief Create an iterator for the certificates.
+	 * 
+	 * @param this				calling object
+	 * @return					iterator for the certificates
+	 */
+	iterator_t *(*create_certificate_iterator) (pkcs7_t *this);
+
 	/**
 	 * @brief Destroys the contentInfo object.
 	 *