crypto/err/err_prn.c

   1 /*
   2  * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stdio.h>
  11 #include "internal/cryptlib.h"
  12 #include <openssl/crypto.h>
  13 #include <openssl/buffer.h>
  14 #include <openssl/err.h>
  15
  16 void ERR_print_errors_cb(int (*cb) (const char *str, size_t len, void *u),
  17                          void *u)
  18 {
  19     unsigned long l;
  20     char buf[256];
  21     char buf2[4096];
  22     const char *file, *data;
  23     int line, flags;
  24     /*
  25      * We don't know what kind of thing CRYPTO_THREAD_ID is. Here is our best
  26      * attempt to convert it into something we can print.
  27      */
  28     union {
  29         CRYPTO_THREAD_ID tid;
  30         unsigned long ltid;
  31     } tid;
  32
  33     tid.ltid = 0;
  34     tid.tid = CRYPTO_THREAD_get_current_id();
  35
  36     while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)) != 0) {
  37         ERR_error_string_n(l, buf, sizeof(buf));
  38         BIO_snprintf(buf2, sizeof(buf2), "%lu:%s:%s:%d:%s\n", tid.ltid, buf,
  39                      file, line, (flags & ERR_TXT_STRING) ? data : "");
  40         if (cb(buf2, strlen(buf2), u) <= 0)
  41             break;              /* abort outputting the error report */
  42     }
  43 }
  44
  45 static int print_bio(const char *str, size_t len, void *bp)
  46 {
  47     return BIO_write((BIO *)bp, str, len);
  48 }
  49
  50 void ERR_print_errors(BIO *bp)
  51 {
  52     ERR_print_errors_cb(print_bio, bp);
  53 }
  54
  55 #ifndef OPENSSL_NO_STDIO
  56 void ERR_print_errors_fp(FILE *fp)
  57 {
  58     BIO *bio = BIO_new_fp(fp, BIO_NOCLOSE);
  59     if (bio == NULL)
  60         return;
  61
  62     ERR_print_errors_cb(print_bio, bio);
  63     BIO_free(bio);
  64 }
  65 #endif