1/* $NetBSD: context.c,v 1.2 2017/01/28 21:31:46 christos Exp $ */ 2 3#include "mech_locl.h" 4#include "heim_threads.h" 5 6struct mg_thread_ctx { 7 gss_OID mech; 8 OM_uint32 maj_stat; 9 OM_uint32 min_stat; 10 gss_buffer_desc maj_error; 11 gss_buffer_desc min_error; 12}; 13 14static HEIMDAL_MUTEX context_mutex = HEIMDAL_MUTEX_INITIALIZER; 15static int created_key; 16static HEIMDAL_thread_key context_key; 17 18 19static void 20destroy_context(void *ptr) 21{ 22 struct mg_thread_ctx *mg = ptr; 23 OM_uint32 junk; 24 25 if (mg == NULL) 26 return; 27 28 gss_release_buffer(&junk, &mg->maj_error); 29 gss_release_buffer(&junk, &mg->min_error); 30 free(mg); 31} 32 33 34static struct mg_thread_ctx * 35_gss_mechglue_thread(void) 36{ 37 struct mg_thread_ctx *ctx; 38 int ret = 0; 39 40 HEIMDAL_MUTEX_lock(&context_mutex); 41 42 if (!created_key) { 43 HEIMDAL_key_create(&context_key, destroy_context, ret); 44 if (ret) { 45 HEIMDAL_MUTEX_unlock(&context_mutex); 46 return NULL; 47 } 48 created_key = 1; 49 } 50 HEIMDAL_MUTEX_unlock(&context_mutex); 51 52 ctx = HEIMDAL_getspecific(context_key); 53 if (ctx == NULL) { 54 55 ctx = calloc(1, sizeof(*ctx)); 56 if (ctx == NULL) 57 return NULL; 58 HEIMDAL_setspecific(context_key, ctx, ret); 59 if (ret) { 60 free(ctx); 61 return NULL; 62 } 63 } 64 return ctx; 65} 66 67OM_uint32 68_gss_mg_get_error(const gss_OID mech, OM_uint32 type, 69 OM_uint32 value, gss_buffer_t string) 70{ 71 struct mg_thread_ctx *mg; 72 73 mg = _gss_mechglue_thread(); 74 if (mg == NULL) 75 return GSS_S_BAD_STATUS; 76 77#if 0 78 /* 79 * We cant check the mech here since a pseudo-mech might have 80 * called an lower layer and then the mech info is all broken 81 */ 82 if (mech != NULL && gss_oid_equal(mg->mech, mech) == 0) 83 return GSS_S_BAD_STATUS; 84#endif 85 86 switch (type) { 87 case GSS_C_GSS_CODE: { 88 if (value != mg->maj_stat || mg->maj_error.length == 0) 89 break; 90 string->value = malloc(mg->maj_error.length + 1); 91 string->length = mg->maj_error.length; 92 memcpy(string->value, mg->maj_error.value, mg->maj_error.length); 93 ((char *) string->value)[string->length] = '\0'; 94 return GSS_S_COMPLETE; 95 } 96 case GSS_C_MECH_CODE: { 97 if (value != mg->min_stat || mg->min_error.length == 0) 98 break; 99 string->value = malloc(mg->min_error.length + 1); 100 string->length = mg->min_error.length; 101 memcpy(string->value, mg->min_error.value, mg->min_error.length); 102 ((char *) string->value)[string->length] = '\0'; 103 return GSS_S_COMPLETE; 104 } 105 } 106 string->value = NULL; 107 string->length = 0; 108 return GSS_S_BAD_STATUS; 109} 110 111void 112_gss_mg_error(gssapi_mech_interface m, OM_uint32 maj, OM_uint32 min) 113{ 114 OM_uint32 major_status, minor_status; 115 OM_uint32 message_content; 116 struct mg_thread_ctx *mg; 117 118 /* 119 * Mechs without gss_display_status() does 120 * gss_mg_collect_error() by themself. 121 */ 122 if (m->gm_display_status == NULL) 123 return ; 124 125 mg = _gss_mechglue_thread(); 126 if (mg == NULL) 127 return; 128 129 gss_release_buffer(&minor_status, &mg->maj_error); 130 gss_release_buffer(&minor_status, &mg->min_error); 131 132 mg->mech = &m->gm_mech_oid; 133 mg->maj_stat = maj; 134 mg->min_stat = min; 135 136 major_status = m->gm_display_status(&minor_status, 137 maj, 138 GSS_C_GSS_CODE, 139 &m->gm_mech_oid, 140 &message_content, 141 &mg->maj_error); 142 if (GSS_ERROR(major_status)) { 143 mg->maj_error.value = NULL; 144 mg->maj_error.length = 0; 145 } 146 major_status = m->gm_display_status(&minor_status, 147 min, 148 GSS_C_MECH_CODE, 149 &m->gm_mech_oid, 150 &message_content, 151 &mg->min_error); 152 if (GSS_ERROR(major_status)) { 153 mg->min_error.value = NULL; 154 mg->min_error.length = 0; 155 } 156} 157 158void 159gss_mg_collect_error(gss_OID mech, OM_uint32 maj, OM_uint32 min) 160{ 161 gssapi_mech_interface m = __gss_get_mechanism(mech); 162 if (m == NULL) 163 return; 164 _gss_mg_error(m, maj, min); 165} 166