[331] | 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include <errno.h>
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| 12 | #include "bio_lcl.h"
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| 13 | #include "internal/cryptlib.h"
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| 14 |
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| 15 | static int null_write(BIO *h, const char *buf, int num);
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| 16 | static int null_read(BIO *h, char *buf, int size);
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| 17 | static int null_puts(BIO *h, const char *str);
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| 18 | static int null_gets(BIO *h, char *str, int size);
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| 19 | static long null_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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| 20 | static int null_new(BIO *h);
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| 21 | static int null_free(BIO *data);
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| 22 | static const BIO_METHOD null_method = {
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| 23 | BIO_TYPE_NULL,
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| 24 | "NULL",
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| 25 | null_write,
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| 26 | null_read,
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| 27 | null_puts,
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| 28 | null_gets,
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| 29 | null_ctrl,
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| 30 | null_new,
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| 31 | null_free,
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| 32 | NULL,
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| 33 | };
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| 34 |
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| 35 | const BIO_METHOD *BIO_s_null(void)
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| 36 | {
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| 37 | return (&null_method);
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| 38 | }
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| 39 |
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| 40 | static int null_new(BIO *bi)
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| 41 | {
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| 42 | bi->init = 1;
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| 43 | bi->num = 0;
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| 44 | bi->ptr = (NULL);
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| 45 | return (1);
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| 46 | }
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| 47 |
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| 48 | static int null_free(BIO *a)
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| 49 | {
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| 50 | if (a == NULL)
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| 51 | return (0);
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| 52 | return (1);
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| 53 | }
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| 54 |
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| 55 | static int null_read(BIO *b, char *out, int outl)
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| 56 | {
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| 57 | return (0);
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| 58 | }
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| 59 |
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| 60 | static int null_write(BIO *b, const char *in, int inl)
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| 61 | {
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| 62 | return (inl);
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| 63 | }
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| 64 |
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| 65 | static long null_ctrl(BIO *b, int cmd, long num, void *ptr)
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| 66 | {
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| 67 | long ret = 1;
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| 68 |
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| 69 | switch (cmd) {
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| 70 | case BIO_CTRL_RESET:
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| 71 | case BIO_CTRL_EOF:
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| 72 | case BIO_CTRL_SET:
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| 73 | case BIO_CTRL_SET_CLOSE:
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| 74 | case BIO_CTRL_FLUSH:
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| 75 | case BIO_CTRL_DUP:
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| 76 | ret = 1;
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| 77 | break;
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| 78 | case BIO_CTRL_GET_CLOSE:
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| 79 | case BIO_CTRL_INFO:
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| 80 | case BIO_CTRL_GET:
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| 81 | case BIO_CTRL_PENDING:
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| 82 | case BIO_CTRL_WPENDING:
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| 83 | default:
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| 84 | ret = 0;
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| 85 | break;
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| 86 | }
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| 87 | return (ret);
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| 88 | }
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| 89 |
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| 90 | static int null_gets(BIO *bp, char *buf, int size)
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| 91 | {
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| 92 | return (0);
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| 93 | }
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| 94 |
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| 95 | static int null_puts(BIO *bp, const char *str)
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| 96 | {
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| 97 | if (str == NULL)
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| 98 | return (0);
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| 99 | return (strlen(str));
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| 100 | }
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