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      1 #pragma ident	"%Z%%M%	%I%	%E% SMI"
      2 
      3 /*
      4  * Copyright 1997 by Massachusetts Institute of Technology
      5  * All Rights Reserved.
      6  *
      7  * Export of this software from the United States of America may
      8  *   require a specific license from the United States Government.
      9  *   It is the responsibility of any person or organization contemplating
     10  *   export to obtain such a license before exporting.
     11  *
     12  * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
     13  * distribute this software and its documentation for any purpose and
     14  * without fee is hereby granted, provided that the above copyright
     15  * notice appear in all copies and that both that copyright notice and
     16  * this permission notice appear in supporting documentation, and that
     17  * the name of M.I.T. not be used in advertising or publicity pertaining
     18  * to distribution of the software without specific, written prior
     19  * permission.  Furthermore if you modify this software you must label
     20  * your software as modified software and not distribute it in such a
     21  * fashion that it might be confused with the original M.I.T. software.
     22  * M.I.T. makes no representations about the suitability of
     23  * this software for any purpose.  It is provided "as is" without express
     24  * or implied warranty.
     25  *
     26  */
     27 
     28 #include "gssapiP_krb5.h"
     29 
     30 /*
     31  * Check to see whether or not a GSSAPI krb5 credential is valid.  If
     32  * it is not, return an error.
     33  */
     34 
     35 OM_uint32
     36 krb5_gss_validate_cred_1(OM_uint32 *minor_status, gss_cred_id_t cred_handle,
     37 			 krb5_context context)
     38 {
     39     krb5_gss_cred_id_t cred;
     40     krb5_error_code code;
     41     krb5_principal princ;
     42 
     43     if (!kg_validate_cred_id(cred_handle)) {
     44 	*minor_status = (OM_uint32) G_VALIDATE_FAILED;
     45 	return(GSS_S_CALL_BAD_STRUCTURE|GSS_S_DEFECTIVE_CREDENTIAL);
     46     }
     47 
     48     cred = (krb5_gss_cred_id_t) cred_handle;
     49 
     50     code = k5_mutex_lock(&cred->lock);
     51     if (code) {
     52 	*minor_status = code;
     53 	return GSS_S_FAILURE;
     54     }
     55 
     56     if (cred->ccache) {
     57 	if ((code = krb5_cc_get_principal(context, cred->ccache, &princ))) {
     58 	    k5_mutex_unlock(&cred->lock);
     59 	    *minor_status = code;
     60 	    return(GSS_S_DEFECTIVE_CREDENTIAL);
     61 	}
     62 	if (!krb5_principal_compare(context, princ, cred->princ)) {
     63 	    k5_mutex_unlock(&cred->lock);
     64 	    *minor_status = KG_CCACHE_NOMATCH;
     65 	    return(GSS_S_DEFECTIVE_CREDENTIAL);
     66 	}
     67 	(void)krb5_free_principal(context, princ);
     68     }
     69     *minor_status = 0;
     70     return GSS_S_COMPLETE;
     71 }
     72 
     73 OM_uint32
     74 krb5_gss_validate_cred(minor_status, cred_handle)
     75      OM_uint32 *minor_status;
     76      gss_cred_id_t cred_handle;
     77 {
     78     krb5_context context;
     79     krb5_error_code code;
     80     OM_uint32 maj;
     81 
     82     code = krb5_gss_init_context(&context);
     83     if (code) {
     84 	*minor_status = code;
     85 	return GSS_S_FAILURE;
     86     }
     87 
     88     maj = krb5_gss_validate_cred_1(minor_status, cred_handle, context);
     89     if (maj == 0) {
     90 	krb5_gss_cred_id_t cred = (krb5_gss_cred_id_t) cred_handle;
     91 	k5_mutex_assert_locked(&cred->lock);
     92 	k5_mutex_unlock(&cred->lock);
     93     }
     94     krb5_free_context(context);
     95     return maj;
     96 }
     97 
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