source4/heimdal/lib/krb5/error_string.c

   1 /*
   2  * Copyright (c) 2001, 2003, 2005 - 2020 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 "krb5_locl.h"
  35
  36 #undef __attribute__
  37 #define __attribute__(x)
  38
  39 /**
  40  * Clears the error message from the Kerberos 5 context.
  41  *
  42  * @param context The Kerberos 5 context to clear
  43  *
  44  * @ingroup krb5_error
  45  */
  46
  47 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
  48 krb5_clear_error_message(krb5_context context)
  49 {
  50     heim_clear_error_message(context->hcontext);
  51 }
  52
  53 /**
  54  * Set the context full error string for a specific error code.
  55  * The error that is stored should be internationalized.
  56  *
  57  * The if context is NULL, no error string is stored.
  58  *
  59  * @param context Kerberos 5 context
  60  * @param ret The error code
  61  * @param fmt Error string for the error code
  62  * @param ... printf(3) style parameters.
  63  *
  64  * @ingroup krb5_error
  65  */
  66
  67 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
  68 krb5_set_error_message(krb5_context context, krb5_error_code ret,
  69                        const char *fmt, ...)
  70     __attribute__ ((__format__ (__printf__, 3, 4)))
  71 {
  72     va_list ap;
  73
  74     va_start(ap, fmt);
  75     krb5_vset_error_message (context, ret, fmt, ap);
  76     va_end(ap);
  77 }
  78
  79 /**
  80  * Set the context full error string for a specific error code.
  81  *
  82  * The if context is NULL, no error string is stored.
  83  *
  84  * @param context Kerberos 5 context
  85  * @param ret The error code
  86  * @param fmt Error string for the error code
  87  * @param args printf(3) style parameters.
  88  *
  89  * @ingroup krb5_error
  90  */
  91
  92
  93 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
  94 krb5_vset_error_message(krb5_context context, krb5_error_code ret,
  95                         const char *fmt, va_list args)
  96     __attribute__ ((__format__ (__printf__, 3, 0)))
  97 {
  98     if (context) {
  99         const char *msg;
 100
 101         heim_vset_error_message(context->hcontext, ret, fmt, args);
 102         msg = heim_get_error_message(context->hcontext, ret);
 103         if (msg) {
 104             _krb5_debug(context, 100, "error message: %s: %d", msg, ret);
 105             heim_free_error_message(context->hcontext, msg);
 106         }
 107     }
 108 }
 109
 110 /**
 111  * Prepend the context full error string for a specific error code.
 112  * The error that is stored should be internationalized.
 113  *
 114  * The if context is NULL, no error string is stored.
 115  *
 116  * @param context Kerberos 5 context
 117  * @param ret The error code
 118  * @param fmt Error string for the error code
 119  * @param ... printf(3) style parameters.
 120  *
 121  * @ingroup krb5_error
 122  */
 123
 124 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
 125 krb5_prepend_error_message(krb5_context context, krb5_error_code ret,
 126                            const char *fmt, ...)
 127     __attribute__ ((__format__ (__printf__, 3, 4)))
 128 {
 129     va_list ap;
 130
 131     va_start(ap, fmt);
 132     krb5_vprepend_error_message(context, ret, fmt, ap);
 133     va_end(ap);
 134 }
 135
 136 /**
 137  * Prepend the contexts's full error string for a specific error code.
 138  *
 139  * The if context is NULL, no error string is stored.
 140  *
 141  * @param context Kerberos 5 context
 142  * @param ret The error code
 143  * @param fmt Error string for the error code
 144  * @param args printf(3) style parameters.
 145  *
 146  * @ingroup krb5_error
 147  */
 148
 149 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
 150 krb5_vprepend_error_message(krb5_context context, krb5_error_code ret,
 151                             const char *fmt, va_list args)
 152     __attribute__ ((__format__ (__printf__, 3, 0)))
 153 {
 154     if (context)
 155         heim_vprepend_error_message(context->hcontext, ret, fmt, args);
 156 }
 157
 158 /**
 159  * Return the error message for `code' in context. On memory
 160  * allocation error the function returns NULL.
 161  *
 162  * @param context Kerberos 5 context
 163  * @param code Error code related to the error
 164  *
 165  * @return an error string, needs to be freed with
 166  * krb5_free_error_message(). The functions return NULL on error.
 167  *
 168  * @ingroup krb5_error
 169  */
 170
 171 KRB5_LIB_FUNCTION const char * KRB5_LIB_CALL
 172 krb5_get_error_message(krb5_context context, krb5_error_code code)
 173 {
 174     const char *cstr = NULL;
 175
 176     if (code == 0)
 177         return strdup("Success");
 178
 179     /*
 180      * The MIT version of this function ignores the krb5_context
 181      * and several widely deployed applications call krb5_get_error_message()
 182      * with a NULL context in order to translate an error code as a
 183      * replacement for error_message().  Another reason a NULL context
 184      * might be provided is if the krb5_init_context() call itself
 185      * failed.
 186      */
 187     if (context == NULL && krb5_init_context(&context) == 0) {
 188         cstr = heim_get_error_message(context->hcontext, code);
 189         krb5_free_context(context);
 190     } else if (context) {
 191         cstr = heim_get_error_message(context->hcontext, code);
 192     } else {
 193         cstr = heim_get_error_message(NULL, code);
 194     }
 195     return cstr;
 196 }
 197
 198
 199 /**
 200  * Free the error message returned by krb5_get_error_message().
 201  *
 202  * @param context Kerberos context
 203  * @param msg error message to free, returned byg
 204  *        krb5_get_error_message().
 205  *
 206  * @ingroup krb5_error
 207  */
 208
 209 KRB5_LIB_FUNCTION void KRB5_LIB_CALL
 210 krb5_free_error_message(krb5_context context, const char *msg)
 211 {
 212     heim_free_error_message(context ? context->hcontext : NULL, msg);
 213 }
 214
 215
 216 /**
 217  * Return the error string for the error code. The caller must not
 218  * free the string.
 219  *
 220  * This function is deprecated since its not threadsafe.
 221  *
 222  * @param context Kerberos 5 context.
 223  * @param code Kerberos error code.
 224  *
 225  * @return the error message matching code
 226  *
 227  * @ingroup krb5
 228  */
 229
 230 KRB5_LIB_FUNCTION const char* KRB5_LIB_CALL
 231 krb5_get_err_text(krb5_context context, krb5_error_code code)
 232     KRB5_DEPRECATED_FUNCTION("Use krb5_get_error_message instead")
 233 {
 234     return krb5_get_error_message(context, code);
 235 }