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/*
* opie.c -- One-Time Password authentication.
*
* For license terms, see the file COPYING in this directory.
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#if defined(STDC_HEADERS)
#include <stdlib.h>
#endif
#include "fetchmail.h"
#include "socket.h"
#include "i18n.h"
#include "md5.h"
#ifdef OPIE_ENABLE
#ifdef __cplusplus
extern "C" {
#endif
#include <opie.h>
#ifdef __cplusplus
}
#endif
int do_otp(int sock, const char *command, struct query *ctl)
{
int i, rval;
char buffer[128];
char challenge[OPIE_CHALLENGE_MAX+1+8];
char response[OPIE_RESPONSE_MAX+1];
gen_send(sock, "%s X-OTP", command);
if ((rval = gen_recv(sock, buffer, sizeof(buffer))))
return rval;
if (strncmp(buffer, "+", 1)) {
report(stderr, GT_("server recv fatal\n"));
return PS_AUTHFAIL;
}
to64frombits(buffer, ctl->remotename, strlen(ctl->remotename));
suppress_tags = TRUE;
gen_send(sock, buffer, sizeof(buffer));
suppress_tags = FALSE;
if ((rval = gen_recv(sock, buffer, sizeof(buffer))))
return rval;
memset(challenge, '\0', sizeof(challenge));
if ((i = from64tobits(challenge, buffer+2, sizeof(challenge))) < 0) {
report(stderr, GT_("Could not decode OTP challenge\n"));
return PS_AUTHFAIL;
};
memset(response, '\0', sizeof(response));
rval = opiegenerator(challenge, ctl->password, response);
if ((rval == -2) && !run.poll_interval) {
char secret[OPIE_SECRET_MAX+1];
fprintf(stderr, GT_("Secret pass phrase: "));
if (opiereadpass(secret, sizeof(secret), 0))
rval = opiegenerator(challenge, secret, response);
memset(secret, 0, sizeof(secret));
};
if (rval)
return(PS_AUTHFAIL);
to64frombits(buffer, response, strlen(response));
suppress_tags = TRUE;
gen_send(sock, buffer, strlen(buffer));
suppress_tags = FALSE;
if ((rval = gen_recv(sock, buffer, sizeof(buffer))))
return rval;
return PS_SUCCESS;
}
#endif /* OPIE_ENABLE */
/* opie.c ends here */
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