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
16void 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
45static int print_bio(const char *str, size_t len, void *bp)
46{
47    return BIO_write((BIO *)bp, str, len);
48}
49
50void ERR_print_errors(BIO *bp)
51{
52    ERR_print_errors_cb(print_bio, bp);
53}
54
55#ifndef OPENSSL_NO_STDIO
56void 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
66