1 | /* |
2 | * Copyright 1995-2018 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 | #include <stdio.h> |
11 | #include <errno.h> |
12 | #include "bio_local.h" |
13 | #include "internal/cryptlib.h" |
14 | |
15 | static int null_write(BIO *h, const char *buf, int num); |
16 | static int null_read(BIO *h, char *buf, int size); |
17 | static int null_puts(BIO *h, const char *str); |
18 | static int null_gets(BIO *h, char *str, int size); |
19 | static long null_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
20 | static const BIO_METHOD null_method = { |
21 | BIO_TYPE_NULL, |
22 | "NULL" , |
23 | /* TODO: Convert to new style write function */ |
24 | bwrite_conv, |
25 | null_write, |
26 | /* TODO: Convert to new style read function */ |
27 | bread_conv, |
28 | null_read, |
29 | null_puts, |
30 | null_gets, |
31 | null_ctrl, |
32 | NULL, |
33 | NULL, |
34 | NULL, /* null_callback_ctrl */ |
35 | }; |
36 | |
37 | const BIO_METHOD *BIO_s_null(void) |
38 | { |
39 | return &null_method; |
40 | } |
41 | |
42 | static int null_read(BIO *b, char *out, int outl) |
43 | { |
44 | return 0; |
45 | } |
46 | |
47 | static int null_write(BIO *b, const char *in, int inl) |
48 | { |
49 | return inl; |
50 | } |
51 | |
52 | static long null_ctrl(BIO *b, int cmd, long num, void *ptr) |
53 | { |
54 | long ret = 1; |
55 | |
56 | switch (cmd) { |
57 | case BIO_CTRL_RESET: |
58 | case BIO_CTRL_EOF: |
59 | case BIO_CTRL_SET: |
60 | case BIO_CTRL_SET_CLOSE: |
61 | case BIO_CTRL_FLUSH: |
62 | case BIO_CTRL_DUP: |
63 | ret = 1; |
64 | break; |
65 | case BIO_CTRL_GET_CLOSE: |
66 | case BIO_CTRL_INFO: |
67 | case BIO_CTRL_GET: |
68 | case BIO_CTRL_PENDING: |
69 | case BIO_CTRL_WPENDING: |
70 | default: |
71 | ret = 0; |
72 | break; |
73 | } |
74 | return ret; |
75 | } |
76 | |
77 | static int null_gets(BIO *bp, char *buf, int size) |
78 | { |
79 | return 0; |
80 | } |
81 | |
82 | static int null_puts(BIO *bp, const char *str) |
83 | { |
84 | if (str == NULL) |
85 | return 0; |
86 | return strlen(str); |
87 | } |
88 | |