crypto/err/err_prn.c

   1 /*
   2  * Copyright 1995-2016 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/lhash.h>
  13 #include <openssl/crypto.h>
  14 #include <openssl/buffer.h>
  15 #include <openssl/err.h>
  16
  17 void ERR_print_errors_cb(int (*cb) (const char *str, size_t len, void *u),
  18                          void *u)
  19 {
  20     unsigned long l;
  21     char buf[256];
  22     char buf2[4096];
  23     const char *file, *data;
  24     int line, flags;
  25     /*
  26      * We don't know what kind of thing CRYPTO_THREAD_ID is. Here is our best
  27      * attempt to convert it into something we can print.
  28      */
  29     union {
  30         CRYPTO_THREAD_ID tid;
  31         unsigned long ltid;
  32     } tid;
  33
  34     tid.ltid = 0;
  35     tid.tid = CRYPTO_THREAD_get_current_id();
  36
  37     while ((l = ERR_get_error_line_data(&file, &line, &data, &flags)) != 0) {
  38         ERR_error_string_n(l, buf, sizeof buf);
  39         BIO_snprintf(buf2, sizeof(buf2), "%lu:%s:%s:%d:%s\n", tid.ltid, buf,
  40                      file, line, (flags & ERR_TXT_STRING) ? data : "");
  41         if (cb(buf2, strlen(buf2), u) <= 0)
  42             break;              /* abort outputting the error report */
  43     }
  44 }
  45
  46 static int print_bio(const char *str, size_t len, void *bp)
  47 {
  48     return BIO_write((BIO *)bp, str, len);
  49 }
  50
  51 void ERR_print_errors(BIO *bp)
  52 {
  53     ERR_print_errors_cb(print_bio, bp);
  54 }
  55
  56 #ifndef OPENSSL_NO_STDIO
  57 void ERR_print_errors_fp(FILE *fp)
  58 {
  59     BIO *bio = BIO_new_fp(fp, BIO_NOCLOSE);
  60     if (bio == NULL)
  61         return;
  62
  63     ERR_print_errors_cb(print_bio, bio);
  64     BIO_free(bio);
  65 }
  66 #endif