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/*
** Copyright 1998 - 2013 Double Precision, Inc. See COPYING for
** distribution information.
*/
#include "courier_auth_config.h"
#include "courierauth.h"
#include "courierauthsasl.h"
#include "authsaslclient.h"
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
/* Use the SASL_LIST macro to build authsasl_list */
#define NO_SERVER_FUNC()
#define SERVER_FUNC(b) int b(const char *, const char *, \
char *(*)(const char *, void *), \
void *, \
char **, \
char **);
#define SASL(a,b,c) b
SASL_LIST
#undef SASL
#undef SERVER_FUNC
#define SERVER_FUNC(n) n
#undef NO_SERVER_FUNC
#define NO_SERVER_FUNC() 0
#define SASL(a,b,c) {a, b},
struct authsasl_info authsasl_list[] = {
SASL_LIST
{ 0, 0}};
int auth_sasl(const char *method,
const char *initreply,
char *(*callback_func)(const char *, void *),
void *callback_arg,
char **authtype_ptr, /* Returned - AUTHTYPE */
char **authdata_ptr)
{
int i;
char *p, *q;
if ((p=malloc(strlen(method)+1)) == 0)
return (0);
strcpy(p, method);
for (q=p; *q; q++)
*q=toupper((int)(unsigned char)*q);
for (i=0; authsasl_list[i].sasl_method; i++)
{
if (strcmp(p, authsasl_list[i].sasl_method) == 0 &&
authsasl_list[i].sasl_func)
{
free(p);
return ( (*authsasl_list[i].sasl_func)
(method,
initreply, callback_func,
callback_arg,
authtype_ptr, authdata_ptr));
}
}
free(p);
errno=ENOENT;
return (AUTHSASL_ERROR);
}
int auth_sasl_ex(const char *method,
const char *initresponse,
const char *externalauth,
char *(*callback_func)(const char *, void *),
void *callback_arg,
char **authtype_ptr, /* Returned - AUTHTYPE */
char **authdata_ptr)
{
char *uid;
int n;
if (strcmp(method, "EXTERNAL"))
return auth_sasl(method, initresponse, callback_func,
callback_arg,
authtype_ptr,
authdata_ptr);
if (!externalauth || !*externalauth)
return AUTHSASL_ERROR;
if (initresponse && !*initresponse)
initresponse=NULL;
if (initresponse)
{
uid=strdup(initresponse);
if (!uid)
return AUTHSASL_ERROR;
n=authsasl_frombase64(uid);
if (n < 0)
{
free(uid);
return AUTHSASL_ABORTED;
}
uid[n]=0;
if (strcmp(uid, externalauth))
{
free(uid);
return AUTHSASL_ERROR;
}
free(uid);
}
else
{
uid=callback_func("", callback_arg);
if (*uid == '*')
{
free(uid);
return (AUTHSASL_ABORTED);
}
n=authsasl_frombase64(uid);
if (n < 0)
{
free(uid);
return AUTHSASL_ABORTED;
}
uid[n]=0;
if (uid[0])
{
free(uid);
return AUTHSASL_ABORTED;
}
free(uid);
}
if ((*authtype_ptr=strdup("EXTERNAL")) == NULL)
return AUTHSASL_ABORTED;
if ((*authdata_ptr=strdup(externalauth)) == NULL)
{
free(*authtype_ptr);
return AUTHSASL_ABORTED;
}
return 0;
}
char *auth_sasl_extract_userid(const char *authtype,
const char *authdata)
{
struct cram_callback_info cci;
char *p;
char *t;
char *d;
if (strcmp(authtype, AUTHTYPE_LOGIN) == 0)
{
char *q;
p=strdup(authdata);
if (!p)
return NULL;
q=strchr(p, '\n');
if (q) *q=0;
return p;
}
if ((t=strdup(authtype)) == NULL)
return NULL;
if ((d=strdup(authdata)) == NULL)
{
free(t);
return NULL;
}
if (auth_get_cram_silent(t, d, &cci))
{
free(d);
free(t);
return (NULL);
}
p=strdup(cci.user);
free(d);
free(t);
return p;
}
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