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scd:openpgp: Allow auto-changing of the key attributes in genkey.

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* scd/app-openpgp.c (struct app_local_s): Add field keyalgo.
(parse_algorithm_attribute): Store the new keyalgo field.
(change_keyattr): Change info message.
(change_keyattr_from_string): Rewrite to also accept a keyref and a
keyalgo string.
(do_genkey): Change the keyattr if a keyalgo string is given.
--

Having this feature makes it easier to use OpenPGP cards in a similar
way to other cards.  Note that the explicit changing via SETATTR is
still supported.

Signed-off-by: Werner Koch <wk@gnupg.org>
This commit is contained in:
Werner Koch 2020-02-11 14:49:11 +01:00
parent 24095101a5
commit d7d75da505
No known key found for this signature in database
GPG key ID: E3FDFF218E45B72B
2 changed files with 181 additions and 47 deletions
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7
scd/command.c
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@ -1363,7 +1363,7 @@ cmd_writekey (assuan_context_t ctx, char *line)
static const char hlp_genkey[] =
"GENKEY [--force] [--timestamp=<isodate>] <keyref>\n"
"GENKEY [--force] [--timestamp=<isodate>] [--algo=ALGO] <keyref>\n"
"\n"
"Generate a key on-card identified by <keyref>, which is application\n"
"specific. Return values are also application specific. For OpenPGP\n"
@ -1385,6 +1385,9 @@ static const char hlp_genkey[] =
"value. The value needs to be in ISO Format; e.g.\n"
"\"--timestamp=20030316T120000\" and after 1970-01-01 00:00:00.\n"
"\n"
"The option --algo can be used to request creation using a specific\n"
"algorithm. The possible algorithms are card dependent.\n"
"\n"
"The public part of the key can also later be retrieved using the\n"
"READKEY command.";
static gpg_error_t
@ -1562,7 +1565,7 @@ static const char hlp_checkpin[] =
" entry system, only the regular CHV will get blocked and not the\n"
" dangerous CHV3. IDSTR is the usual card's serial number in hex\n"
" notation; an optional fingerprint part will get ignored. There\n"
" is however a special mode if the IDSTR is sffixed with the\n"
" is however a special mode if the IDSTR is suffixed with the\n"
" literal string \"[CHV3]\": In this case the Admin PIN is checked\n"
" if and only if the retry counter is still at 3.\n"
"\n"