[12057] in Kerberos-V5-bugs
[krbdev.mit.edu #6937] concurrency issue between
daemon@ATHENA.MIT.EDU (Arlene Berry" via RT)
Fri Jul 22 19:48:20 2011
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From: ""Arlene Berry" via RT" <rt-comment@krbdev.MIT.EDU>
In-Reply-To: <rt-6937@krbdev.mit.edu>
Message-ID: <rt-6937-34193.1.20894602508322@krbdev.mit.edu>
To: "'AdminCc of krbdev.mit.edu Ticket #6937'":;"'AdminCc of krbdev.mit.edu Ticket #6937'":;@MIT.EDU
Date: Fri, 22 Jul 2011 19:48:18 -0400 (EDT)
Reply-To: rt-comment@krbdev.MIT.EDU
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Errors-To: krb5-bugs-bounces@mit.edu
#include <krb5.h>
#include <stdio.h>
#include <termios.h>
#include <memory.h>
#include <stdint.h>
#include <pthread.h>
struct retrieve_info
{
krb5_context context;
krb5_ccache cache;
krb5_creds *search;
};
void *retrieve_routine(void *info)
{
struct retrieve_info *thread_info = (struct retrieve_info *)info;
krb5_creds retr_creds;
int loop;
for (loop = 0; loop < 1000; loop++)
{
if (krb5_cc_retrieve_cred(thread_info->context, thread_info->cache, KRB5_TC_SUPPORTED_KTYPES, thread_info->search, &retr_creds) < 0)
{
printf("An error occurred while searching for the creds\n");
return NULL;
}
printf("got back creds %d\n", loop);
krb5_free_cred_contents(thread_info->context, &retr_creds);
}
return NULL;
}
int main(int argc, const char *argv[])
{
krb5_error_code error;
char password[100];
krb5_context context;
krb5_creds creds;
krb5_principal principal;
struct termios old, new;
krb5_ccache cache;
krb5_get_init_creds_opt opts;
int loop;
struct retrieve_info thread_info;
pthread_t retrieve_thread;
tcgetattr(fileno(stdin), &old);
memcpy(&new, &old, sizeof(old));
new.c_lflag &= ~(ECHO); tcsetattr(fileno(stdin), TCSANOW, &new);
printf("Enter password for %s:\n", argv[1]);
fgets(password, sizeof(password), stdin);
password[strlen(password) - 1] = 0;
tcsetattr(fileno(stdin), TCSANOW, &old);
error = krb5_init_context(&context);
if (error)
goto error;
error = krb5_parse_name(context, argv[1], &principal);
if (error)
goto error;
krb5_get_init_creds_opt_init(&opts);
if (krb5_get_init_creds_password(context,
&creds,
principal,
password,
NULL,
NULL,
0,
NULL,
&opts) < 0)
{
goto error;
}
if (krb5_cc_default(context, &cache))
goto error;
if (krb5_cc_initialize(context, cache, principal))
goto error;
if (krb5_cc_store_cred(context, cache, &creds))
goto error;
thread_info.context = context;
thread_info.cache = cache;
thread_info.search = &creds;
if (pthread_create(&retrieve_thread, NULL, retrieve_routine, &thread_info) != 0)
{
goto error;
}
for (loop = 0; loop < 1000; loop++)
{
error = krb5_cc_store_cred(context, cache, &creds);
if (error < 0)
{
printf("Failed to write creds %d\n", error);
goto error;
}
printf("Wrote creds %d\n", loop);
}
if (pthread_join(retrieve_thread, NULL) < 0)
{
goto error;
}
return 0;
error:
printf("Error occurred\n");
return 1;
}
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