int decode_public_key(const char *filename, unsigned char **blob,
size_t *decoded_size);
+int decode_private_key(const char *key_file, unsigned char **result,
+ size_t *blob_size);
+/** Legacy PEM keys (openssh-7.7 and earlier, paraslash.0.6.2 and earlier) */
+#define PKT_PEM (0)
+/** OPENSSH keys (since openssh-7.8, paraslash.0.6.3) */
+#define PKT_OPENSSH (1)
int check_private_key_file(const char *file);
int find_openssh_bignum_offset(const unsigned char *data, int len);