SilcBool silc_pkcs_private_key_alloc(SilcPKCSType type,
                                         unsigned char *key,
                                         SilcUInt32 key_len,
                                         SilcPrivateKey *ret_private_key);

    Allocates SilcPrivateKey of the type of `type' from the key data
    `key' of length of `key_len' bytes.  Returns FALSE if the `key'
    is malformed or unsupported private key type.