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scd: Add option --info to emit KEYPAIRINFO by readkey command.

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* scd/command.c (do_readkey): Implement this.
* scd/app-help.c (app_help_get_keygrip_string_pk): Make HEXKEYGRIP
parm optional.  Add arg R_ALGOSTR.
--

This patch basically mimics what we do in 2.3.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2021-05-03 20:14:10 +02:00
parent c2ba6bea4c
commit b8df8321e1
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
3 changed files with 65 additions and 13 deletions
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27
scd/app-help.c
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@ -57,10 +57,13 @@ app_help_count_bits (const unsigned char *a, size_t len)
* function succeeded, the S-expression representing the key is stored
* there. The caller needs to call gcry_sexp_release on that. If
* R_ALGO is not NULL the public key algorithm id of Libgcrypt is
* stored there. */
* stored there. If R_ALGOSTR is not NULL and the function succeeds a
* newly allocated algo string (e.g. "rsa2048") is stored there.
* HEXKEYGRIP may be NULL if the caller is not interested in it. */
gpg_error_t
app_help_get_keygrip_string_pk (const void *pk, size_t pklen, char *hexkeygrip,
gcry_sexp_t *r_pkey, int *r_algo)
gcry_sexp_t *r_pkey, int *r_algo,
char **r_algostr)
{
gpg_error_t err;
gcry_sexp_t s_pkey;
@ -68,11 +71,13 @@ app_help_get_keygrip_string_pk (const void *pk, size_t pklen, char *hexkeygrip,
if (r_pkey)
*r_pkey = NULL;
if (r_algostr)
*r_algostr = NULL;
err = gcry_sexp_sscan (&s_pkey, NULL, pk, pklen);
if (err)
return err; /* Can't parse that S-expression. */
if (!gcry_pk_get_keygrip (s_pkey, array))
if (hexkeygrip && !gcry_pk_get_keygrip (s_pkey, array))
{
gcry_sexp_release (s_pkey);
return gpg_error (GPG_ERR_GENERAL); /* Failed to calculate the keygrip.*/
@ -81,12 +86,24 @@ app_help_get_keygrip_string_pk (const void *pk, size_t pklen, char *hexkeygrip,
if (r_algo)
*r_algo = get_pk_algo_from_key (s_pkey);
if (r_algostr)
{
*r_algostr = pubkey_algo_string (s_pkey, NULL);
if (!*r_algostr)
{
err = gpg_error_from_syserror ();
gcry_sexp_release (s_pkey);
return err;
}
}
if (r_pkey)
*r_pkey = s_pkey;
else
gcry_sexp_release (s_pkey);
bin2hex (array, KEYGRIP_LEN, hexkeygrip);
if (hexkeygrip)
bin2hex (array, KEYGRIP_LEN, hexkeygrip);
return 0;
}
@ -116,7 +133,7 @@ app_help_get_keygrip_string (ksba_cert_t cert, char *hexkeygrip,
if (!n)
return gpg_error (GPG_ERR_INV_SEXP);
err = app_help_get_keygrip_string_pk ((void*)p, n, hexkeygrip,
r_pkey, r_algo);
r_pkey, r_algo, NULL);
ksba_free (p);
return err;
}