1 /* 2 * Copyright (c) 1998 - 2006 Kungliga Tekniska Högskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "gsskrb5_locl.h" 35 36 static const char * 37 calling_error(OM_uint32 v) 38 { 39 static const char *msgs[] = { 40 NULL, /* 0 */ 41 "A required input parameter could not be read.", /* */ 42 "A required output parameter could not be written.", /* */ 43 "A parameter was malformed" 44 }; 45 46 v >>= GSS_C_CALLING_ERROR_OFFSET; 47 48 if (v == 0) 49 return ""; 50 else if (v >= sizeof(msgs)/sizeof(*msgs)) 51 return "unknown calling error"; 52 else 53 return msgs[v]; 54 } 55 56 static const char * 57 routine_error(OM_uint32 v) 58 { 59 static const char *msgs[] = { 60 NULL, /* 0 */ 61 "An unsupported mechanism was requested", 62 "An invalid name was supplied", 63 "A supplied name was of an unsupported type", 64 "Incorrect channel bindings were supplied", 65 "An invalid status code was supplied", 66 "A token had an invalid MIC", 67 "No credentials were supplied, " 68 "or the credentials were unavailable or inaccessible.", 69 "No context has been established", 70 "A token was invalid", 71 "A credential was invalid", 72 "The referenced credentials have expired", 73 "The context has expired", 74 "Miscellaneous failure (see text)", 75 "The quality-of-protection requested could not be provide", 76 "The operation is forbidden by local security policy", 77 "The operation or option is not available", 78 "The requested credential element already exists", 79 "The provided name was not a mechanism name.", 80 }; 81 82 v >>= GSS_C_ROUTINE_ERROR_OFFSET; 83 84 if (v == 0) 85 return ""; 86 else if (v >= sizeof(msgs)/sizeof(*msgs)) 87 return "unknown routine error"; 88 else 89 return msgs[v]; 90 } 91 92 static const char * 93 supplementary_error(OM_uint32 v) 94 { 95 static const char *msgs[] = { 96 "normal completion", 97 "continuation call to routine required", 98 "duplicate per-message token detected", 99 "timed-out per-message token detected", 100 "reordered (early) per-message token detected", 101 "skipped predecessor token(s) detected" 102 }; 103 104 v >>= GSS_C_SUPPLEMENTARY_OFFSET; 105 106 if (v >= sizeof(msgs)/sizeof(*msgs)) 107 return "unknown routine error"; 108 else 109 return msgs[v]; 110 } 111 112 void 113 _gsskrb5_clear_status (void) 114 { 115 krb5_context context; 116 117 if (_gsskrb5_init (&context) != 0) 118 return; 119 krb5_clear_error_message(context); 120 } 121 122 void 123 _gsskrb5_set_status (int ret, const char *fmt, ...) 124 { 125 krb5_context context; 126 va_list args; 127 char *str; 128 int e; 129 130 if (_gsskrb5_init (&context) != 0) 131 return; 132 133 va_start(args, fmt); 134 e = vasprintf(&str, fmt, args); 135 va_end(args); 136 if (e >= 0 && str) { 137 krb5_set_error_message(context, ret, "%s", str); 138 free(str); 139 } 140 } 141 142 OM_uint32 GSSAPI_CALLCONV _gsskrb5_display_status 143 (OM_uint32 *minor_status, 144 OM_uint32 status_value, 145 int status_type, 146 const gss_OID mech_type, 147 OM_uint32 *message_context, 148 gss_buffer_t status_string) 149 { 150 krb5_context context; 151 char *buf = NULL; 152 int e = 0; 153 154 GSSAPI_KRB5_INIT (&context); 155 156 status_string->length = 0; 157 status_string->value = NULL; 158 159 if (gss_oid_equal(mech_type, GSS_C_NO_OID) == 0 && 160 gss_oid_equal(mech_type, GSS_KRB5_MECHANISM) == 0) { 161 *minor_status = 0; 162 return GSS_C_GSS_CODE; 163 } 164 165 if (status_type == GSS_C_GSS_CODE) { 166 if (GSS_SUPPLEMENTARY_INFO(status_value)) 167 e = asprintf(&buf, "%s", 168 supplementary_error(GSS_SUPPLEMENTARY_INFO(status_value))); 169 else 170 e = asprintf (&buf, "%s %s", 171 calling_error(GSS_CALLING_ERROR(status_value)), 172 routine_error(GSS_ROUTINE_ERROR(status_value))); 173 } else if (status_type == GSS_C_MECH_CODE) { 174 const char *buf2 = krb5_get_error_message(context, status_value); 175 if (buf2) { 176 buf = strdup(buf2); 177 krb5_free_error_message(context, buf2); 178 } else { 179 e = asprintf(&buf, "unknown mech error-code %u", 180 (unsigned)status_value); 181 } 182 } else { 183 *minor_status = EINVAL; 184 return GSS_S_BAD_STATUS; 185 } 186 187 if (e < 0 || buf == NULL) { 188 *minor_status = ENOMEM; 189 return GSS_S_FAILURE; 190 } 191 192 *message_context = 0; 193 *minor_status = 0; 194 195 status_string->length = strlen(buf); 196 status_string->value = buf; 197 198 return GSS_S_COMPLETE; 199 } 200