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gpg: Allow predefined names as answer to the keygen.algo prompt.

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* g10/keygen.c (ask_algo): Add list of strings.

--
Signed-off-by: Werner Koch <wk@gnupg.org>
(backported from commit b1d5ed6ac8)
This commit is contained in:
Werner Koch 2015-01-28 09:11:02 +01:00
parent 2424028fd9
commit b2359db21c
2 changed files with 40 additions and 10 deletions
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28
doc/DETAILS
View File

@ -1301,3 +1301,31 @@ This can be implemented using Hurd's translator mechanism.
However, I think the whole key server stuff has to be re-thought;
I have some ideas and probably create a white paper.
Algorithm names for the "keygen.algo" prompt
============================================
When using a --command-fd controlled key generation or "addkey"
there is way to know the number to enter on the "keygen.algo"
prompt. The displayed numbers are for human reception and may
change with releases. To provide a stable way to enter a desired
algorithm choice the prompt also accepts predefined names for the
algorithms, which will not change.
| Name | No | Description |
|---------+----+---------------------------------|
| rsa+rsa | 1 | RSA and RSA (default) |
| dsa+elg | 2 | DSA and Elgamal |
| dsa | 3 | DSA (sign only) |
| rsa/s | 4 | RSA (sign only) |
| elg | 5 | Elgamal (encrypt only) |
| rsa/e | 6 | RSA (encrypt only) |
| dsa/* | 7 | DSA (set your own capabilities) |
| rsa/* | 8 | RSA (set your own capabilities) |
If one of the "foo/*" names are used a "keygen.flags" prompt needs
to be answered as well. Instead of toggling the predefined flags,
it is also possible to set them direct: Use a "=" character
directly followed by a comination of "a" (for authentication), "s"
(for signing), or "c" (for certification).

22
g10/keygen.c
View File

@ -1700,7 +1700,7 @@ ask_key_flags(int algo,int subkey)
static int
ask_algo (int addmode, int *r_subkey_algo, unsigned int *r_usage)
{
char *answer;
char *answer = NULL;
int algo;
int dummy_algo;
@ -1732,53 +1732,53 @@ ask_algo (int addmode, int *r_subkey_algo, unsigned int *r_usage)
{
*r_usage = 0;
*r_subkey_algo = 0;
xfree (answer);
answer = cpr_get ("keygen.algo", _("Your selection? "));
cpr_kill_prompt ();
algo = *answer? atoi (answer) : 1;
xfree(answer);
if (algo == 1 && !addmode)
if ((algo == 1 || !strcmp (answer, "rsa+rsa")) && !addmode)
{
algo = PUBKEY_ALGO_RSA;
*r_subkey_algo = PUBKEY_ALGO_RSA;
break;
}
else if (algo == 2 && !addmode)
else if ((algo == 2 || !strcmp (answer, "dsa+elg")) && !addmode)
{
algo = PUBKEY_ALGO_DSA;
*r_subkey_algo = PUBKEY_ALGO_ELGAMAL_E;
break;
}
else if (algo == 3)
else if (algo == 3 || !strcmp (answer, "dsa"))
{
algo = PUBKEY_ALGO_DSA;
*r_usage = PUBKEY_USAGE_SIG;
break;
}
else if (algo == 4)
else if (algo == 4 || !strcmp (answer, "rsa/s"))
{
algo = PUBKEY_ALGO_RSA;
*r_usage = PUBKEY_USAGE_SIG;
break;
}
else if (algo == 5 && addmode)
else if ((algo == 5 || !strcmp (answer, "elg")) && addmode)
{
algo = PUBKEY_ALGO_ELGAMAL_E;
*r_usage = PUBKEY_USAGE_ENC;
break;
}
else if (algo == 6 && addmode)
else if ((algo == 6 || !strcmp (answer, "rsa/e")) && addmode)
{
algo = PUBKEY_ALGO_RSA;
*r_usage = PUBKEY_USAGE_ENC;
break;
}
else if (algo == 7 && opt.expert)
else if ((algo == 7 || !strcmp (answer, "dsa/*")) && opt.expert)
{
algo = PUBKEY_ALGO_DSA;
*r_usage = ask_key_flags (algo, addmode);
break;
}
else if (algo == 8 && opt.expert)
else if ((algo == 8 || !strcmp (answer, "rsa/*")) && opt.expert)
{
algo = PUBKEY_ALGO_RSA;
*r_usage = ask_key_flags (algo, addmode);
@ -1786,8 +1786,10 @@ ask_algo (int addmode, int *r_subkey_algo, unsigned int *r_usage)
}
else
tty_printf (_("Invalid selection.\n"));
}
xfree(answer);
return algo;
}