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RRTcodebaseC

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if (dc_pgp_handle_rpgp_error(context)) {
goto cleanup;
}
/* Get the public key */
pkey = rpgp_skey_public_key(skey);
if (dc_pgp_handle_rpgp_error(context)) {
goto cleanup;
}
/* Serialize public key into bytes */
pkey_bytes = rpgp_pkey_to_bytes(pkey);
if (dc_pgp_handle_rpgp_error(context)) {
goto cleanup;
}
/* copy into the return secret key */
dc_key_set_from_binary(ret_private_key, rpgp_cvec_data(skey_bytes), rpgp_cvec_len(skey_bytes), DC_KEY_PRIVATE);
if (dc_pgp_handle_rpgp_error(context)) {
goto cleanup;
}
/* copy into the return public key */
dc_key_set_from_binary(ret_public_key, rpgp_cvec_data(pkey_bytes), rpgp_cvec_len(pkey_bytes), DC_KEY_PUBLIC);
if (dc_pgp_handle_rpgp_error(context)) {
goto cleanup;
}
success = 1;
/* cleanup */
cleanup:
if (skey) { rpgp_skey_drop(skey); }
if (skey_bytes) { rpgp_cvec_drop(skey_bytes); }
if (pkey) { rpgp_pkey_drop(pkey); }
if (pkey_bytes) { rpgp_cvec_drop(pkey_bytes); }
if (user_id) { free(user_id); }
return success;
}
#else // !DC_USE_RPGP
static unsigned add_key_prefs(pgp_create_sig_t *sig)
{
/* similar to pgp_add_key_prefs(), Mimic of GPG default settings, limited to supported algos */
return
/* Symmetric algo prefs */
pgp_write_ss_header(sig->output, 6, PGP_PTAG_SS_PREFERRED_SKA) &&
pgp_write_scalar(sig->output, PGP_SA_AES_256, 1) &&
pgp_write_scalar(sig->output, PGP_SA_AES_128, 1) &&
pgp_write_scalar(sig->output, PGP_SA_CAST5, 1) &&
pgp_write_scalar(sig->output, PGP_SA_TRIPLEDES, 1) &&
pgp_write_scalar(sig->output, PGP_SA_IDEA, 1) &&
/* Hash algo prefs, the first algo is the preferred algo */
pgp_write_ss_header(sig->output, 6, PGP_PTAG_SS_PREFERRED_HASH) &&
pgp_write_scalar(sig->output, PGP_HASH_SHA256, 1) &&
pgp_write_scalar(sig->output, PGP_HASH_SHA384, 1) &&
pgp_write_scalar(sig->output, PGP_HASH_SHA512, 1) &&
pgp_write_scalar(sig->output, PGP_HASH_SHA224, 1) &&
pgp_write_scalar(sig->output, PGP_HASH_SHA1, 1) && /* Edit for Autocrypt/Delta Chat: due to the weak SHA1, it should not be preferred */
/* Compression algo prefs */
pgp_write_ss_header(sig->output, 2/*1+number of following items*/, PGP_PTAG_SS_PREF_COMPRESS) &&
pgp_write_scalar(sig->output, PGP_C_ZLIB, 1) /*&& -- not sure if Delta Chat will support bzip2 on all platforms, however, this is not that important as typical files are compressed themselves and text is not that big
pgp_write_scalar(sig->output, PGP_C_BZIP2, 1) -- if you re-enable this, do not forget to modifiy the header count*/;
}
static void add_selfsigned_userid(pgp_key_t *skey, pgp_key_t *pkey, const uint8_t *userid, time_t key_expiry)
{
/* similar to pgp_add_selfsigned_userid() which, however, uses different key flags */
pgp_create_sig_t* sig = NULL;
pgp_subpacket_t sigpacket;
pgp_memory_t* mem_sig = NULL;
pgp_output_t* sigoutput = NULL;
/* create sig for this pkt */
sig = pgp_create_sig_new();
pgp_sig_start_key_sig(sig, &skey->key.seckey.pubkey, NULL, userid, PGP_CERT_POSITIVE);
pgp_add_creation_time(sig, time(NULL));
pgp_add_key_expiration_time(sig, key_expiry);
pgp_add_primary_userid(sig, 1);
pgp_add_key_flags(sig, PGP_KEYFLAG_SIGN_DATA|PGP_KEYFLAG_CERT_KEYS);
add_key_prefs(sig);
pgp_add_key_features(sig); /* will add 0x01 - modification detection */
pgp_end_hashed_subpkts(sig);
pgp_add_issuer_keyid(sig, skey->pubkeyid); /* the issuer keyid is not hashed by definition */
pgp_setup_memory_write(&sigoutput, &mem_sig, 128);
pgp_write_sig(sigoutput, sig, &skey->key.seckey.pubkey, &skey->key.seckey);
/* add this packet to key */
sigpacket.length = pgp_mem_len(mem_sig);
sigpacket.raw = pgp_mem_data(mem_sig);