1/*
2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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#define OPENSSL_SUPPRESS_DEPRECATED
11
12#include <stdio.h>
13#include <string.h>
14#include <stdlib.h>
15#include "bio_local.h"
16#include "internal/cryptlib.h"
17#include <openssl/err.h>
18
19long BIO_debug_callback_ex(BIO *bio, int cmd, const char *argp, size_t len,
20                           int argi, long argl, int ret, size_t *processed)
21{
22    BIO *b;
23    char buf[256];
24    char *p;
25    int left;
26    size_t l = 0;
27
28    if (processed != NULL)
29        l = *processed;
30
31    left = BIO_snprintf(buf, sizeof(buf), "BIO[%p]: ", (void *)bio);
32
33    /* Ignore errors and continue printing the other information. */
34    if (left < 0)
35        left = 0;
36    p = buf + left;
37    left = sizeof(buf) - left;
38
39    switch (cmd) {
40    case BIO_CB_FREE:
41        BIO_snprintf(p, left, "Free - %s\n", bio->method->name);
42        break;
43    case BIO_CB_READ:
44        if (bio->method->type & BIO_TYPE_DESCRIPTOR)
45            BIO_snprintf(p, left, "read(%d,%zu) - %s fd=%d\n",
46                         bio->num, len,
47                         bio->method->name, bio->num);
48        else
49            BIO_snprintf(p, left, "read(%d,%zu) - %s\n",
50                    bio->num, len, bio->method->name);
51        break;
52    case BIO_CB_WRITE:
53        if (bio->method->type & BIO_TYPE_DESCRIPTOR)
54            BIO_snprintf(p, left, "write(%d,%zu) - %s fd=%d\n",
55                         bio->num, len,
56                         bio->method->name, bio->num);
57        else
58            BIO_snprintf(p, left, "write(%d,%zu) - %s\n",
59                         bio->num, len, bio->method->name);
60        break;
61    case BIO_CB_PUTS:
62        BIO_snprintf(p, left, "puts() - %s\n", bio->method->name);
63        break;
64    case BIO_CB_GETS:
65        BIO_snprintf(p, left, "gets(%zu) - %s\n", len,
66                     bio->method->name);
67        break;
68    case BIO_CB_CTRL:
69        BIO_snprintf(p, left, "ctrl(%d) - %s\n", argi,
70                     bio->method->name);
71        break;
72    case BIO_CB_RETURN | BIO_CB_READ:
73        BIO_snprintf(p, left, "read return %d processed: %zu\n", ret, l);
74        break;
75    case BIO_CB_RETURN | BIO_CB_WRITE:
76        BIO_snprintf(p, left, "write return %d processed: %zu\n", ret, l);
77        break;
78    case BIO_CB_RETURN | BIO_CB_GETS:
79        BIO_snprintf(p, left, "gets return %d processed: %zu\n", ret, l);
80        break;
81    case BIO_CB_RETURN | BIO_CB_PUTS:
82        BIO_snprintf(p, left, "puts return %d processed: %zu\n", ret, l);
83        break;
84    case BIO_CB_RETURN | BIO_CB_CTRL:
85        BIO_snprintf(p, left, "ctrl return %d\n", ret);
86        break;
87    default:
88        BIO_snprintf(p, left, "bio callback - unknown type (%d)\n", cmd);
89        break;
90    }
91
92    b = (BIO *)bio->cb_arg;
93    if (b != NULL)
94        BIO_write(b, buf, strlen(buf));
95#if !defined(OPENSSL_NO_STDIO)
96    else
97        fputs(buf, stderr);
98#endif
99    return ret;
100}
101
102#ifndef OPENSSL_NO_DEPRECATED_3_0
103long BIO_debug_callback(BIO *bio, int cmd, const char *argp,
104                        int argi, long argl, long ret)
105{
106    size_t processed = 0;
107
108    if (ret > 0)
109        processed = (size_t)ret;
110    BIO_debug_callback_ex(bio, cmd, argp, (size_t)argi,
111                          argi, argl, ret > 0 ? 1 : (int)ret, &processed);
112    return ret;
113}
114#endif
115