Thomas-Bahn at gmx
Oct 27, 2009, 1:28 PM
Post #1 of 3
(508 views)
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<GPG Agent> - invalid length of cacheID
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Hello,
i have the problem, that gpg-agent throws errors when launching the pinentry.
I analyzed the problem and would give you my results in the hope, that the bug can be fixed.
I have no idea what else can be faulty…
I searched the code snippet for you to help simplify the work on this problem as good as i can.
I think its the code snippet that causes this error but i can't analyze this furthermore because my skills not as good as needed.
Following the gpg-agent.conf:
debug-level guru
log-file socket:///home/thomas/.gnupg/log-socket
pinentry-program /usr/bin/pinentry-gtk-2
no-grab
default-cache-ttl 1800
The settings are correct i'm sure.
Here is a part of the log from KWatchGnuPG:
5 - 2009-10-27 19:22:17 gpg-agent[3840.9] DBG: <- GET_PASSPHRASE --data --repeat=0 -- X X Passphrase: Please+enter+the+passphrase+to+unprotect+the+PKCS#12+object.
5 - 2009-10-27 19:22:17 gpg-agent[3840]: starting a new PIN Entry
5 - 2009-10-27 19:22:17 gpg-agent[3840]: DBG: connection to PIN entry established
5 - 2009-10-27 19:22:17 gpg-agent[3840.9] DBG: -> INQUIRE PINENTRY_LAUNCHED 4205
5 - 2009-10-27 19:22:17 gpg-agent[3840.9] DBG: <- END
5 - 2009-10-27 19:22:17 gpg-agent[3840]: command get_passphrase failed: End of File
5 - 2009-10-27 19:22:17 gpg-agent[3840.9] DBG: -> OK closing connection
But this log wasn't enough information so i looked for reproducing the error directly in gpg-agent. And i found gpg-connect-agent.
Here the error when i connect to gpg-agent and give him the command:
gpg-connect-agent
> GET_PASSPHRASE
ERR 67109144 IPC Parameterfehler <GPG Agent> - invalid length of cacheID
>
This error was enough information for me and i found following code in gnupg-2.0.13/agent/command.c :
In function cmd_get_passphrase:
static int
cmd_get_passphrase (assuan_context_t ctx, char *line)
{
ctrl_t ctrl = assuan_get_pointer (ctx);
int rc;
const char *pw;
char *response;
char *cacheid = NULL, *desc = NULL, *prompt = NULL, *errtext = NULL;
const char *desc2 = _("Please re-enter this passphrase");
char *p;
void *cache_marker;
int opt_data, opt_check, opt_no_ask, opt_qualbar;
int opt_repeat = 0;
char *repeat_errtext = NULL;
opt_data = has_option (line, "--data");
opt_check = has_option (line, "--check");
opt_no_ask = has_option (line, "--no-ask");
if (has_option_name (line, "--repeat"))
{
p = option_value (line, "--repeat");
if (p)
opt_repeat = atoi (p);
else
opt_repeat = 1;
}
opt_qualbar = has_option (line, "--qualitybar");
line = skip_options (line);
cacheid = line;
p = strchr (cacheid, ' ');
if (p)
{
*p++ = 0;
while (*p == ' ')
p++;
errtext = p;
p = strchr (errtext, ' ');
if (p)
{
*p++ = 0;
while (*p == ' ')
p++;
prompt = p;
p = strchr (prompt, ' ');
if (p)
{
*p++ = 0;
while (*p == ' ')
p++;
desc = p;
p = strchr (desc, ' ');
if (p)
*p = 0; /* Ignore trailing garbage. */
}
}
}
if (!cacheid || !*cacheid || strlen (cacheid) > 50)
return set_error (GPG_ERR_ASS_PARAMETER, "invalid length of cacheID");
if (!desc)
return set_error (GPG_ERR_ASS_PARAMETER, "no description given");
--- CUT --- (the pasted code is long enough ;))
if (!cacheid || !*cacheid || strlen (cacheid) > 50)
return set_error (GPG_ERR_ASS_PARAMETER, "invalid length of cacheID");
This statement must be the cause of the error... but what value was in cacheid and why it can be faulty? I can't answer this question and hope you can?
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