Generalized the x509write_csr_set_key_usage() function and key_usage
storage
diff --git a/include/polarssl/asn1.h b/include/polarssl/asn1.h
index 195ebcb..ec8cbfa 100644
--- a/include/polarssl/asn1.h
+++ b/include/polarssl/asn1.h
@@ -93,7 +93,10 @@
/** Returns the size of the binary string, without the trailing \\0 */
#define OID_SIZE(x) (sizeof(x) - 1)
-/** Compares two asn1_buf structures for the same OID */
+/** Compares two asn1_buf structures for the same OID. Only works for
+ * 'defined' oid_str values (OID_HMAC_SHA1), you cannot use a 'unsigned
+ * char *oid' here!
+ */
#define OID_CMP(oid_str, oid_buf) \
( ( OID_SIZE(oid_str) == (oid_buf)->len ) && \
memcmp( (oid_str), (oid_buf)->p, (oid_buf)->len) == 0 )
@@ -140,6 +143,17 @@
asn1_sequence;
/**
+ * Container for a sequence or list of 'named' ASN.1 data items
+ */
+typedef struct _asn1_named_data
+{
+ asn1_buf oid; /**< The object identifier. */
+ asn1_buf val; /**< The named value. */
+ struct _asn1_named_data *next; /**< The next entry in the sequence. */
+}
+asn1_named_data;
+
+/**
* Get the length of an ASN.1 element.
* Updates the pointer to immediately behind the length.
*
@@ -286,6 +300,25 @@
const unsigned char *end,
asn1_buf *alg );
+/**
+ * Find a specific named_data entry in a sequence or list based on the OID.
+ *
+ * \param list The list to seek through
+ * \param oid The OID to look for
+ * \param len Size of the OID
+ *
+ * \return NULL if not found, or a pointer to the existing entry.
+ */
+asn1_named_data *asn1_find_named_data( asn1_named_data *list,
+ const char *oid, size_t len );
+
+/**
+ * Free a asn1_named_data entry
+ *
+ * \param entry The named data entry to free
+ */
+void asn1_free_named_data( asn1_named_data *entry );
+
#ifdef __cplusplus
}
#endif