-size_t is_ssh_rsa_key(char *data, size_t size);
-uint32_t read_ssh_u32(const void *vp);
-int uudecode(const char *src, unsigned char *target, size_t targsize);
-int check_ssh_key_header(const unsigned char *blob, int blen);
-int check_key_file(const char *file, bool private_key);
-int base64_decode(char const *src, unsigned char *target, size_t targsize);
+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);