
Calling strerror() with a negative value is an error. Besides fixing that, we streamline hx509_get_error_string(), making it much simpler and easier to read.
221 lines
5.8 KiB
C
221 lines
5.8 KiB
C
/*
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* Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan
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* (Royal Institute of Technology, Stockholm, Sweden).
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "hx_locl.h"
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/**
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* @page page_error Hx509 error reporting functions
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*
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* See the library functions here: @ref hx509_error
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*/
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struct hx509_error_data {
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hx509_error next;
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int code;
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char *msg;
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};
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/**
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* Resets the error strings the hx509 context.
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*
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* @param context A hx509 context.
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_FUNCTION void HX509_LIB_CALL
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hx509_clear_error_string(hx509_context context)
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{
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if (context) {
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heim_release(context->error);
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context->error = NULL;
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}
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}
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/**
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* Add an error message to the hx509 context.
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*
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* @param context A hx509 context.
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* @param flags
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* - HX509_ERROR_APPEND appends the error string to the old messages
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(code is updated).
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* @param code error code related to error message
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* @param fmt error message format
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* @param ap arguments to error message format
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_FUNCTION void HX509_LIB_CALL
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hx509_set_error_stringv(hx509_context context, int flags, int code,
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const char *fmt, va_list ap)
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{
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heim_error_t msg;
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if (context == NULL)
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return;
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msg = heim_error_createv(code, fmt, ap);
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if (msg) {
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if (flags & HX509_ERROR_APPEND)
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heim_error_append(msg, context->error);
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heim_release(context->error);
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}
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context->error = msg;
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}
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/**
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* See hx509_set_error_stringv().
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*
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* @param context A hx509 context.
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* @param flags
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* - HX509_ERROR_APPEND appends the error string to the old messages
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(code is updated).
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* @param code error code related to error message
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* @param fmt error message format
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* @param ... arguments to error message format
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_FUNCTION void HX509_LIB_CALL
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hx509_set_error_string(hx509_context context, int flags, int code,
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const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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hx509_set_error_stringv(context, flags, code, fmt, ap);
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va_end(ap);
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}
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/**
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* Sets ENOMEM as the error on a hx509 context.
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*
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* @param context A hx509 context.
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_FUNCTION int HX509_LIB_CALL
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hx509_enomem(hx509_context context)
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{
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return heim_enomem(context->hcontext);
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}
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/**
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* Get an error string from context associated with error_code.
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*
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* @param context A hx509 context.
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* @param error_code Get error message for this error code.
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*
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* @return error string, free with hx509_free_error_string().
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_FUNCTION char * HX509_LIB_CALL
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hx509_get_error_string(hx509_context context, int error_code)
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{
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heim_string_t s = NULL;
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const char *cstr = NULL;
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char *str;
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if (context) {
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if (context->error &&
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heim_error_get_code(context->error) == error_code &&
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(s = heim_error_copy_string(context->error)))
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cstr = heim_string_get_utf8(s);
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if (cstr == NULL)
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cstr = com_right(context->et_list, error_code);
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if (cstr == NULL && error_code > -1)
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cstr = strerror(error_code);
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} /* else this could be an error in hx509_context_init() */
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if (cstr == NULL)
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cstr = error_message(error_code); /* never returns NULL */
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str = strdup(cstr);
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heim_release(s);
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return str;
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}
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/**
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* Free error string returned by hx509_get_error_string().
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*
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* @param str error string to free.
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_FUNCTION void HX509_LIB_CALL
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hx509_free_error_string(char *str)
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{
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free(str);
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}
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/**
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* Print error message and fatally exit from error code
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*
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* @param context A hx509 context.
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* @param exit_code exit() code from process.
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* @param error_code Error code for the reason to exit.
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* @param fmt format string with the exit message.
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* @param ... argument to format string.
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*
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* @ingroup hx509_error
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*/
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HX509_LIB_NORETURN_FUNCTION
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__attribute__ ((__noreturn__, __format__ (__printf__, 4, 5)))
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void HX509_LIB_CALL
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hx509_err(hx509_context context, int exit_code,
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int error_code, const char *fmt, ...)
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{
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va_list ap;
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const char *msg;
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char *str;
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int ret;
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va_start(ap, fmt);
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ret = vasprintf(&str, fmt, ap);
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va_end(ap);
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msg = hx509_get_error_string(context, error_code);
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if (msg == NULL)
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msg = "no error";
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errx(exit_code, "%s: %s", ret != -1 ? str : "ENOMEM", msg);
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}
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