Attachment 305095 Details for Bug 446025 – pam_authenticate.c

pam_authenticate.c

pam_authenticate.c (text/x-csrc), 3.61 KB, created by Jose Plans on 2008-05-12 08:00:58 UTC

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Creator: Jose Plans

Created: 2008-05-12 08:00:58 UTC

Size: 3.61 KB

patch

obsolete

>/*
>Author: Sachin Prabhu <sprabhu@redhat.com>
>
>Code samples used from following sources.
>file:///usr/share/doc/pam-devel-0.99.8.1/html/adg-example.html
>http://www.freebsd.org/doc/en/articles/pam/pam-sample-conv.html
>*/
>
>#include <stdio.h>
>#include <string.h>
>#include <errno.h>
>#include <stdlib.h>
>
>#include <security/pam_appl.h>
>#include <security/pam_misc.h>
>
>char *password=NULL;
>
>int converse(int n, const struct pam_message **msg, struct pam_response **resp, void *data)
>{
>    struct pam_response *aresp;
>    char buf[PAM_MAX_RESP_SIZE];
>    int i;
>
>    data = data;
>    if (n <= 0 || n > PAM_MAX_NUM_MSG)
>        return (PAM_CONV_ERR);
>    if ((aresp = calloc(n, sizeof *aresp)) == NULL)
>        return (PAM_BUF_ERR);
>    for (i = 0; i < n; ++i) {
>        aresp[i].resp_retcode = 0;
>        aresp[i].resp = NULL;
>        switch (msg[i]->msg_style) {
>        case PAM_PROMPT_ECHO_OFF:
>            aresp[i].resp = strdup(password);
>            if (aresp[i].resp == NULL)
>                goto fail;
>            break;
>        case PAM_PROMPT_ECHO_ON:
>            fputs(msg[i]->msg, stderr);
>            if (fgets(buf, sizeof buf, stdin) == NULL)
>                goto fail;
>            aresp[i].resp = strdup(buf);
>            if (aresp[i].resp == NULL)
>                goto fail;
>            break;
>        case PAM_ERROR_MSG:
>            fputs(msg[i]->msg, stderr);
>            if (strlen(msg[i]->msg) > 0 &&
>                msg[i]->msg[strlen(msg[i]->msg) - 1] != '\n')
>                fputc('\n', stderr);
>            break;
>        case PAM_TEXT_INFO:
>            fputs(msg[i]->msg, stdout);
>            if (strlen(msg[i]->msg) > 0 &&
>                msg[i]->msg[strlen(msg[i]->msg) - 1] != '\n')
>                fputc('\n', stdout);
>            break;
>        default:
>            goto fail;
>        }
>    }
>    *resp = aresp;
>    return (PAM_SUCCESS);
> fail:
>        for (i = 0; i < n; ++i) {
>                if (aresp[i].resp != NULL) {
>                        memset(aresp[i].resp, 0, strlen(aresp[i].resp));
>                        free(aresp[i].resp);
>                }
>        }
>        memset(aresp, 0, n * sizeof *aresp);
>    *resp = NULL;
>    return (PAM_CONV_ERR);
>}
>
>static struct pam_conv conv = {
>    converse,
>    NULL
>};
>
>int myauth(char *service, char *username)
>{
>
>	pam_handle_t *pamh=NULL;
>        int retval;
>
>	if( (retval = pam_start(service, username, &conv, &pamh ))  != PAM_SUCCESS ){
>		fprintf( stderr, "pam_start: %d: %s\n", retval, pam_strerror(pamh, retval) );
>		return -retval;
>	}
>
>	if( (retval = pam_authenticate(pamh,0))  != PAM_SUCCESS ){
>		fprintf( stderr, "pam_authenticate: %d: %s\n", retval, pam_strerror(pamh, retval) );
>		return -retval;
>	}
>
>	if( (retval = pam_acct_mgmt(pamh,0))  != PAM_SUCCESS ){
>		fprintf( stderr, "pam_acct_mgmt: %d: %s\n", retval, pam_strerror(pamh, retval) );
>		return -retval;
>	}
>
>       	if( (retval = pam_open_session(pamh,0))  != PAM_SUCCESS ){
>       		fprintf( stderr, "pam_open_session: %d: %s\n", retval, pam_strerror(pamh, retval) );
>		return -retval;
>       	}
>
>	if( pam_end(pamh, retval) != PAM_SUCCESS ){
>       		fprintf( stderr, "pam_end: failed to close pam session\n" );
>		return -1;
>	}
>	
>	return 0;
>}
>
>int main( int argc, char **argv)
>{
>	unsigned int i=0,errors=0;
>
>	if( argc != 4 ){
>		fprintf(stderr, "Invalid number of arguments.\nUsage: %s <service> <username> <passwd>\n", argv[0]);
>		return -EINVAL;
>	}
>	
>	password=argv[3];
>
>	for( i=0; i<100000; i++ ){
>		if( myauth(argv[1], argv[2]) < 0 ){
>			errors++;
>			printf("errors=%lu, count=%lu\n", errors,i+1);
>		}
>		if( ((i+1)%1000) == 0 ){
>			printf("count %lu\n",i+1);
>		}
>	}
>
>	printf("Completed %lu iterations. Number of errors encountered = %lu.\n",i,errors);
>
>}

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Attachments on bug 446025: 305095 | 305097 | 305099