1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 7 /* 8 * lib/gssapi/krb5/import_sec_context.c 9 * 10 * Copyright 1995,2004 by the Massachusetts Institute of Technology. 11 * All Rights Reserved. 12 * 13 * Export of this software from the United States of America may 14 * require a specific license from the United States Government. 15 * It is the responsibility of any person or organization contemplating 16 * export to obtain such a license before exporting. 17 * 18 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 19 * distribute this software and its documentation for any purpose and 20 * without fee is hereby granted, provided that the above copyright 21 * notice appear in all copies and that both that copyright notice and 22 * this permission notice appear in supporting documentation, and that 23 * the name of M.I.T. not be used in advertising or publicity pertaining 24 * to distribution of the software without specific, written prior 25 * permission. Furthermore if you modify this software you must label 26 * your software as modified software and not distribute it in such a 27 * fashion that it might be confused with the original M.I.T. software. 28 * M.I.T. makes no representations about the suitability of 29 * this software for any purpose. It is provided "as is" without express 30 * or implied warranty. 31 * 32 */ 33 34 /* 35 * import_sec_context.c - Internalize the security context. 36 */ 37 #include "gssapiP_krb5.h" 38 /* for serialization initialization functions */ 39 #include "k5-int.h" 40 #include "mglueP.h" /* SUNW15resync - for KGSS_ macros */ 41 42 #ifdef _KERNEL 43 extern OM_uint32 kgss_release_oid(OM_uint32 *, gss_OID *); 44 #endif 45 46 47 /* 48 * Fix up the OID of the mechanism so that uses the static version of 49 * the OID if possible. 50 */ 51 gss_OID krb5_gss_convert_static_mech_oid(oid) 52 gss_OID oid; 53 { 54 const gss_OID_desc *p; 55 OM_uint32 minor_status; 56 57 for (p = krb5_gss_oid_array; p->length; p++) { 58 if ((oid->length == p->length) && 59 (memcmp(oid->elements, p->elements, p->length) == 0)) { 60 (void) KGSS_RELEASE_OID(&minor_status, &oid); 61 return (gss_OID) p; 62 } 63 } 64 return oid; 65 } 66 67 krb5_error_code 68 krb5_gss_ser_init (krb5_context context) 69 { 70 krb5_error_code code; 71 static krb5_error_code (KRB5_CALLCONV *const fns[])(krb5_context) = { 72 krb5_ser_auth_context_init, 73 #ifndef _KERNEL 74 krb5_ser_context_init, 75 krb5_ser_ccache_init, krb5_ser_rcache_init, krb5_ser_keytab_init, 76 #endif 77 }; 78 int i; 79 80 for (i = 0; i < sizeof(fns)/sizeof(fns[0]); i++) 81 if ((code = (fns[i])(context)) != 0) 82 return code; 83 return 0; 84 } 85 86 OM_uint32 87 krb5_gss_import_sec_context(minor_status, interprocess_token, context_handle) 88 OM_uint32 *minor_status; 89 gss_buffer_t interprocess_token; 90 gss_ctx_id_t *context_handle; 91 { 92 krb5_context context; 93 krb5_error_code kret = 0; 94 size_t blen; 95 krb5_gss_ctx_id_t ctx; 96 krb5_octet *ibp; 97 98 /* This is a bit screwy. We create a krb5 context because we need 99 one when calling the serialization code. However, one of the 100 objects we're unpacking is a krb5 context, so when we finish, 101 we can throw this one away. */ 102 kret = KGSS_INIT_CONTEXT(&context); 103 if (kret) { 104 *minor_status = kret; 105 return GSS_S_FAILURE; 106 } 107 108 kret = krb5_gss_ser_init(context); 109 if (kret) { 110 krb5_free_context(context); 111 *minor_status = kret; 112 return GSS_S_FAILURE; 113 } 114 115 /* Assume a tragic failure */ 116 ctx = (krb5_gss_ctx_id_t) NULL; 117 *minor_status = 0; 118 119 /* Internalize the context */ 120 ibp = (krb5_octet *) interprocess_token->value; 121 blen = (size_t) interprocess_token->length; 122 kret = kg_ctx_internalize(context, (krb5_pointer *) &ctx, &ibp, &blen); 123 /* 124 * SUNW15resync 125 * 126 * krb5_free_context(context); 127 * Previous versions of MIT(1.2ish)/Solaris did not serialize the 128 * k5_context but MIT 1.5 does. But we don't need all the userspace 129 * junk in the kernel so we continue to not serialize it. 130 * So we keep this context live here (see it's use in kg_ctx_internalize) 131 * and it will get freed by delete_sec_context. 132 */ 133 if (kret) { 134 krb5_free_context(context); 135 *minor_status = (OM_uint32) kret; 136 return(GSS_S_FAILURE); 137 } 138 139 /* intern the context handle */ 140 if (! kg_save_ctx_id((gss_ctx_id_t) ctx)) { 141 (void)krb5_gss_delete_sec_context(minor_status, 142 (gss_ctx_id_t *) &ctx, NULL 143 #ifdef _KERNEL 144 ,0 /* gssd_ctx_verifier */ 145 #endif 146 ); 147 *minor_status = (OM_uint32) G_VALIDATE_FAILED; 148 return(GSS_S_FAILURE); 149 } 150 ctx->mech_used = krb5_gss_convert_static_mech_oid(ctx->mech_used); 151 152 *context_handle = (gss_ctx_id_t) ctx; 153 154 *minor_status = 0; 155 return (GSS_S_COMPLETE); 156 } 157