g10: Allow receiving cleartext secret keys from agent

* g10/export.c (match_curve_skey_pk): New function, testing whether an
OpenPGP public key and an S-expression use the same curve.
* g10/export.c (cleartext_secret_key_to_openpgp): New function,
filling in the secret key parameters of a PKT_public_key object from
a corresponding cleartext S-expression.
* g10/export.c, g10/main.h (receive_seckey_from_agent): Add cleartext
parameter, enabling retrieval of the secret key, unlocked.
* g10/export.c (do_export_stream): Send cleartext as 0, keeping current
behavior.
* g10/keygen.c (card_store_key_with_backup): Use cleartext=0 to ensure
that smartcard backups are all passphrase-locked.
--

This sets up internal functionality to be capable of exporting
cleartext secret keys, but does not change any existing behavior.

Signed-off-by: Daniel Kahn Gillmor <[email protected]>

1 files changed, 1 insertions, 0 deletions

diff --git a/g10/main.h b/g10/main.h
index bda0bc188..7b716ffd6 100644
--- a/g10/main.h
+++ b/g10/main.h
@@ -389,6 +389,7 @@ gpg_error_t export_pubkey_buffer (ctrl_t ctrl, const char *keyspec,
                                   void **r_data, size_t *r_datalen);
 
 gpg_error_t receive_seckey_from_agent (ctrl_t ctrl, gcry_cipher_hd_t cipherhd,
+                                       int cleartext,
                                        char **cache_nonce_addr, const char *hexgrip,
                                        PKT_public_key *pk);