+/**
+ * keysubkeys - Takes a key & returns an array of its subkey fingerprints
+ * @key: The key to get the subkeys of.
+ *
+ * keysubkeys takes a public key structure and returns an array of the
+ * subkey fingerprints for that key.
+ */
+struct openpgp_fingerprint *keysubkeys(struct openpgp_publickey *key);
+
+/**
+ * parse_subpackets - Parse the subpackets of a Type 4 signature.
+ * @data: The subpacket data.
+ * @len: The amount of data available to read.
+ * @parselen: The amount of data that was actually parsed.
+ * @keyid: A pointer to where we should return the keyid.
+ * @creationtime: A pointer to where we should return the creation time.
+ *
+ * This function parses the subkey data of a Type 4 signature and fills
+ * in the supplied variables. It also returns the length of the data
+ * processed. If the value of any piece of data is not desired a NULL
+ * can be passed instead of a pointer to a storage area for that value.
+ */
+onak_status_t parse_subpackets(unsigned char *data, size_t len,
+ size_t *parselen, uint64_t *keyid, time_t *creation);
+
+enum onak_oid {
+ ONAK_OID_UNKNOWN = 0,
+ ONAK_OID_INVALID,
+ ONAK_OID_CURVE25519,
+ ONAK_OID_ED25519,
+ ONAK_OID_NISTP256,
+ ONAK_OID_NISTP384,
+ ONAK_OID_NISTP521,
+ ONAK_OID_BRAINPOOLP256R1,
+ ONAK_OID_BRAINPOOLP384R1,
+ ONAK_OID_BRAINPOOLP512R1,
+ ONAK_OID_SECP256K1,
+};
+
+enum onak_oid onak_parse_oid(uint8_t *buf, size_t len);
+