+/* $OpenBSD: auth-krb5.c,v 1.18 2006/05/06 08:35:40 dtucker Exp $ */
/*
* Kerberos v5 authentication and ticket-passing routines.
*
*/
#include "includes.h"
-RCSID("$OpenBSD: auth-krb5.c,v 1.15 2003/11/21 11:57:02 djm Exp $");
#include "ssh.h"
#include "ssh1.h"
#include "auth.h"
#ifdef KRB5
-
#include <krb5.h>
extern ServerOptions options;
problem = krb5_init_context(&authctxt->krb5_ctx);
if (problem)
return (problem);
- krb5_init_ets(authctxt->krb5_ctx);
}
return (0);
}
#ifndef HEIMDAL
krb5_creds creds;
krb5_principal server;
- char ccname[40];
- int tmpfd;
#endif
krb5_error_code problem;
krb5_ccache ccache = NULL;
-
- if (!authctxt->valid)
- return (0);
+ int len;
temporarily_use_uid(authctxt->pw);
if (problem)
goto out;
+
problem = krb5_cc_gen_new(authctxt->krb5_ctx, &krb5_fcc_ops,
&authctxt->krb5_fwd_ccache);
if (problem)
goto out;
}
- snprintf(ccname,sizeof(ccname),"FILE:/tmp/krb5cc_%d_XXXXXX",geteuid());
-
- if ((tmpfd = mkstemp(ccname+strlen("FILE:")))==-1) {
- logit("mkstemp(): %.100s", strerror(errno));
- problem = errno;
- goto out;
- }
-
- if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) {
- logit("fchmod(): %.100s", strerror(errno));
- close(tmpfd);
- problem = errno;
- goto out;
- }
- close(tmpfd);
-
- problem = krb5_cc_resolve(authctxt->krb5_ctx, ccname, &authctxt->krb5_fwd_ccache);
+ problem = ssh_krb5_cc_gen(authctxt->krb5_ctx, &authctxt->krb5_fwd_ccache);
if (problem)
goto out;
authctxt->krb5_ticket_file = (char *)krb5_cc_get_name(authctxt->krb5_ctx, authctxt->krb5_fwd_ccache);
+ len = strlen(authctxt->krb5_ticket_file) + 6;
+ authctxt->krb5_ccname = xmalloc(len);
+ snprintf(authctxt->krb5_ccname, len, "FILE:%s",
+ authctxt->krb5_ticket_file);
+
+#ifdef USE_PAM
+ if (options.use_pam)
+ do_pam_putenv("KRB5CCNAME", authctxt->krb5_ccname);
+#endif
+
out:
restore_uid();
else
return (0);
}
- return (1);
+ return (authctxt->valid ? 1 : 0);
}
void
}
}
+#ifndef HEIMDAL
+krb5_error_code
+ssh_krb5_cc_gen(krb5_context ctx, krb5_ccache *ccache) {
+ int tmpfd, ret;
+ char ccname[40];
+ mode_t old_umask;
+
+ ret = snprintf(ccname, sizeof(ccname),
+ "FILE:/tmp/krb5cc_%d_XXXXXXXXXX", geteuid());
+ if (ret < 0 || (size_t)ret >= sizeof(ccname))
+ return ENOMEM;
+
+ old_umask = umask(0177);
+ tmpfd = mkstemp(ccname + strlen("FILE:"));
+ umask(old_umask);
+ if (tmpfd == -1) {
+ logit("mkstemp(): %.100s", strerror(errno));
+ return errno;
+ }
+
+ if (fchmod(tmpfd,S_IRUSR | S_IWUSR) == -1) {
+ logit("fchmod(): %.100s", strerror(errno));
+ close(tmpfd);
+ return errno;
+ }
+ close(tmpfd);
+
+ return (krb5_cc_resolve(ctx, ccname, ccache));
+}
+#endif /* !HEIMDAL */
#endif /* KRB5 */