[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 <openssl/crypto.h>
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| 13 | #include "bio_lcl.h"
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| 14 | #include "internal/cryptlib.h"
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| 15 |
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| 16 | BIO *BIO_new(const BIO_METHOD *method)
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| 17 | {
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| 18 | BIO *bio = OPENSSL_zalloc(sizeof(*bio));
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| 19 |
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| 20 | if (bio == NULL) {
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| 21 | BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
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| 22 | return (NULL);
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| 23 | }
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| 24 |
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| 25 | bio->method = method;
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| 26 | bio->shutdown = 1;
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| 27 | bio->references = 1;
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| 28 |
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| 29 | if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data))
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| 30 | goto err;
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| 31 |
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| 32 | bio->lock = CRYPTO_THREAD_lock_new();
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| 33 | if (bio->lock == NULL) {
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| 34 | BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
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| 35 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
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| 36 | goto err;
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| 37 | }
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| 38 |
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| 39 | if (method->create != NULL && !method->create(bio)) {
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| 40 | BIOerr(BIO_F_BIO_NEW, ERR_R_INIT_FAIL);
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| 41 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
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| 42 | CRYPTO_THREAD_lock_free(bio->lock);
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| 43 | goto err;
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| 44 | }
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| 45 |
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| 46 | return bio;
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| 47 |
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| 48 | err:
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| 49 | OPENSSL_free(bio);
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| 50 | return NULL;
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| 51 | }
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| 52 |
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| 53 | int BIO_free(BIO *a)
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| 54 | {
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| 55 | int i;
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| 56 |
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| 57 | if (a == NULL)
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| 58 | return 0;
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| 59 |
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| 60 | if (CRYPTO_atomic_add(&a->references, -1, &i, a->lock) <= 0)
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| 61 | return 0;
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| 62 |
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| 63 | REF_PRINT_COUNT("BIO", a);
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| 64 | if (i > 0)
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| 65 | return 1;
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| 66 | REF_ASSERT_ISNT(i < 0);
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| 67 | if ((a->callback != NULL) &&
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| 68 | ((i = (int)a->callback(a, BIO_CB_FREE, NULL, 0, 0L, 1L)) <= 0))
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| 69 | return i;
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| 70 |
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| 71 | if ((a->method != NULL) && (a->method->destroy != NULL))
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| 72 | a->method->destroy(a);
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| 73 |
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| 74 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
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| 75 |
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| 76 | CRYPTO_THREAD_lock_free(a->lock);
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| 77 |
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| 78 | OPENSSL_free(a);
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| 79 |
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| 80 | return 1;
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| 81 | }
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| 82 |
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| 83 | void BIO_set_data(BIO *a, void *ptr)
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| 84 | {
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| 85 | a->ptr = ptr;
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| 86 | }
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| 87 |
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| 88 | void *BIO_get_data(BIO *a)
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| 89 | {
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| 90 | return a->ptr;
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| 91 | }
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| 92 |
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| 93 | void BIO_set_init(BIO *a, int init)
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| 94 | {
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| 95 | a->init = init;
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| 96 | }
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| 97 |
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| 98 | int BIO_get_init(BIO *a)
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| 99 | {
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| 100 | return a->init;
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| 101 | }
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| 102 |
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| 103 | void BIO_set_shutdown(BIO *a, int shut)
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| 104 | {
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| 105 | a->shutdown = shut;
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| 106 | }
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| 107 |
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| 108 | int BIO_get_shutdown(BIO *a)
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| 109 | {
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| 110 | return a->shutdown;
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| 111 | }
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| 112 |
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| 113 | void BIO_vfree(BIO *a)
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| 114 | {
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| 115 | BIO_free(a);
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| 116 | }
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| 117 |
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| 118 | int BIO_up_ref(BIO *a)
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| 119 | {
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| 120 | int i;
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| 121 |
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| 122 | if (CRYPTO_atomic_add(&a->references, 1, &i, a->lock) <= 0)
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| 123 | return 0;
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| 124 |
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| 125 | REF_PRINT_COUNT("BIO", a);
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| 126 | REF_ASSERT_ISNT(i < 2);
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| 127 | return ((i > 1) ? 1 : 0);
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| 128 | }
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| 129 |
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| 130 | void BIO_clear_flags(BIO *b, int flags)
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| 131 | {
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| 132 | b->flags &= ~flags;
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| 133 | }
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| 134 |
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| 135 | int BIO_test_flags(const BIO *b, int flags)
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| 136 | {
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| 137 | return (b->flags & flags);
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| 138 | }
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| 139 |
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| 140 | void BIO_set_flags(BIO *b, int flags)
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| 141 | {
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| 142 | b->flags |= flags;
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| 143 | }
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| 144 |
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| 145 | long (*BIO_get_callback(const BIO *b)) (struct bio_st *, int, const char *,
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| 146 | int, long, long) {
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| 147 | return b->callback;
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| 148 | }
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| 149 |
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| 150 | void BIO_set_callback(BIO *b,
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| 151 | long (*cb) (struct bio_st *, int, const char *, int,
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| 152 | long, long))
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| 153 | {
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| 154 | b->callback = cb;
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| 155 | }
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| 156 |
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| 157 | void BIO_set_callback_arg(BIO *b, char *arg)
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| 158 | {
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| 159 | b->cb_arg = arg;
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| 160 | }
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| 161 |
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| 162 | char *BIO_get_callback_arg(const BIO *b)
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| 163 | {
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| 164 | return b->cb_arg;
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| 165 | }
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| 166 |
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| 167 | const char *BIO_method_name(const BIO *b)
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| 168 | {
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| 169 | return b->method->name;
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| 170 | }
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| 171 |
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| 172 | int BIO_method_type(const BIO *b)
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| 173 | {
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| 174 | return b->method->type;
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| 175 | }
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| 176 |
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| 177 | int BIO_read(BIO *b, void *out, int outl)
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| 178 | {
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| 179 | int i;
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| 180 | long (*cb) (BIO *, int, const char *, int, long, long);
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| 181 |
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| 182 | if ((b == NULL) || (b->method == NULL) || (b->method->bread == NULL)) {
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| 183 | BIOerr(BIO_F_BIO_READ, BIO_R_UNSUPPORTED_METHOD);
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| 184 | return (-2);
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| 185 | }
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| 186 |
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| 187 | cb = b->callback;
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| 188 | if ((cb != NULL) &&
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| 189 | ((i = (int)cb(b, BIO_CB_READ, out, outl, 0L, 1L)) <= 0))
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| 190 | return (i);
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| 191 |
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| 192 | if (!b->init) {
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| 193 | BIOerr(BIO_F_BIO_READ, BIO_R_UNINITIALIZED);
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| 194 | return (-2);
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| 195 | }
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| 196 |
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| 197 | i = b->method->bread(b, out, outl);
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| 198 |
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| 199 | if (i > 0)
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| 200 | b->num_read += (uint64_t)i;
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| 201 |
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| 202 | if (cb != NULL)
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| 203 | i = (int)cb(b, BIO_CB_READ | BIO_CB_RETURN, out, outl, 0L, (long)i);
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| 204 | return (i);
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| 205 | }
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| 206 |
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| 207 | int BIO_write(BIO *b, const void *in, int inl)
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| 208 | {
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| 209 | int i;
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| 210 | long (*cb) (BIO *, int, const char *, int, long, long);
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| 211 |
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| 212 | if (b == NULL)
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| 213 | return (0);
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| 214 |
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| 215 | cb = b->callback;
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| 216 | if ((b->method == NULL) || (b->method->bwrite == NULL)) {
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| 217 | BIOerr(BIO_F_BIO_WRITE, BIO_R_UNSUPPORTED_METHOD);
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| 218 | return (-2);
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| 219 | }
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| 220 |
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| 221 | if ((cb != NULL) &&
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| 222 | ((i = (int)cb(b, BIO_CB_WRITE, in, inl, 0L, 1L)) <= 0))
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| 223 | return (i);
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| 224 |
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| 225 | if (!b->init) {
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| 226 | BIOerr(BIO_F_BIO_WRITE, BIO_R_UNINITIALIZED);
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| 227 | return (-2);
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| 228 | }
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| 229 |
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| 230 | i = b->method->bwrite(b, in, inl);
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| 231 |
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| 232 | if (i > 0)
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| 233 | b->num_write += (uint64_t)i;
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| 234 |
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| 235 | if (cb != NULL)
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| 236 | i = (int)cb(b, BIO_CB_WRITE | BIO_CB_RETURN, in, inl, 0L, (long)i);
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| 237 | return (i);
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| 238 | }
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| 239 |
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| 240 | int BIO_puts(BIO *b, const char *in)
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| 241 | {
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| 242 | int i;
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| 243 | long (*cb) (BIO *, int, const char *, int, long, long);
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| 244 |
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| 245 | if ((b == NULL) || (b->method == NULL) || (b->method->bputs == NULL)) {
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| 246 | BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
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| 247 | return (-2);
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| 248 | }
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| 249 |
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| 250 | cb = b->callback;
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| 251 |
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| 252 | if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_PUTS, in, 0, 0L, 1L)) <= 0))
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| 253 | return (i);
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| 254 |
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| 255 | if (!b->init) {
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| 256 | BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
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| 257 | return (-2);
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| 258 | }
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| 259 |
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| 260 | i = b->method->bputs(b, in);
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| 261 |
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| 262 | if (i > 0)
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| 263 | b->num_write += (uint64_t)i;
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| 264 |
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| 265 | if (cb != NULL)
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| 266 | i = (int)cb(b, BIO_CB_PUTS | BIO_CB_RETURN, in, 0, 0L, (long)i);
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| 267 | return (i);
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| 268 | }
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| 269 |
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| 270 | int BIO_gets(BIO *b, char *in, int inl)
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| 271 | {
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| 272 | int i;
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| 273 | long (*cb) (BIO *, int, const char *, int, long, long);
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| 274 |
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| 275 | if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
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| 276 | BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
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| 277 | return (-2);
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| 278 | }
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| 279 |
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| 280 | cb = b->callback;
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| 281 |
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| 282 | if ((cb != NULL) && ((i = (int)cb(b, BIO_CB_GETS, in, inl, 0L, 1L)) <= 0))
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| 283 | return (i);
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| 284 |
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| 285 | if (!b->init) {
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| 286 | BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
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| 287 | return (-2);
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| 288 | }
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| 289 |
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| 290 | i = b->method->bgets(b, in, inl);
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| 291 |
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| 292 | if (cb != NULL)
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| 293 | i = (int)cb(b, BIO_CB_GETS | BIO_CB_RETURN, in, inl, 0L, (long)i);
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| 294 | return (i);
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| 295 | }
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| 296 |
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| 297 | int BIO_indent(BIO *b, int indent, int max)
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| 298 | {
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| 299 | if (indent < 0)
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| 300 | indent = 0;
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| 301 | if (indent > max)
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| 302 | indent = max;
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| 303 | while (indent--)
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| 304 | if (BIO_puts(b, " ") != 1)
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| 305 | return 0;
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| 306 | return 1;
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| 307 | }
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| 308 |
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| 309 | long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
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| 310 | {
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| 311 | int i;
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| 312 |
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| 313 | i = iarg;
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| 314 | return (BIO_ctrl(b, cmd, larg, (char *)&i));
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| 315 | }
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| 316 |
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| 317 | void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
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| 318 | {
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| 319 | void *p = NULL;
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| 320 |
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| 321 | if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
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| 322 | return (NULL);
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| 323 | else
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| 324 | return (p);
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| 325 | }
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| 326 |
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| 327 | long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
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| 328 | {
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| 329 | long ret;
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| 330 | long (*cb) (BIO *, int, const char *, int, long, long);
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| 331 |
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| 332 | if (b == NULL)
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| 333 | return (0);
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| 334 |
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| 335 | if ((b->method == NULL) || (b->method->ctrl == NULL)) {
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| 336 | BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
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| 337 | return (-2);
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| 338 | }
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| 339 |
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| 340 | cb = b->callback;
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| 341 |
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| 342 | if ((cb != NULL) &&
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| 343 | ((ret = cb(b, BIO_CB_CTRL, parg, cmd, larg, 1L)) <= 0))
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| 344 | return (ret);
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| 345 |
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| 346 | ret = b->method->ctrl(b, cmd, larg, parg);
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| 347 |
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| 348 | if (cb != NULL)
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| 349 | ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, cmd, larg, ret);
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| 350 | return (ret);
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| 351 | }
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| 352 |
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| 353 | long BIO_callback_ctrl(BIO *b, int cmd,
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| 354 | void (*fp) (struct bio_st *, int, const char *, int,
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| 355 | long, long))
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| 356 | {
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| 357 | long ret;
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| 358 | long (*cb) (BIO *, int, const char *, int, long, long);
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| 359 |
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| 360 | if (b == NULL)
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| 361 | return (0);
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| 362 |
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| 363 | if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
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| 364 | BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
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| 365 | return (-2);
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| 366 | }
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| 367 |
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| 368 | cb = b->callback;
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| 369 |
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| 370 | if ((cb != NULL) &&
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| 371 | ((ret = cb(b, BIO_CB_CTRL, (void *)&fp, cmd, 0, 1L)) <= 0))
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| 372 | return (ret);
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| 373 |
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| 374 | ret = b->method->callback_ctrl(b, cmd, fp);
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| 375 |
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| 376 | if (cb != NULL)
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| 377 | ret = cb(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, cmd, 0, ret);
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| 378 | return (ret);
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| 379 | }
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| 380 |
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| 381 | /*
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| 382 | * It is unfortunate to duplicate in functions what the BIO_(w)pending macros
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| 383 | * do; but those macros have inappropriate return type, and for interfacing
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| 384 | * from other programming languages, C macros aren't much of a help anyway.
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| 385 | */
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| 386 | size_t BIO_ctrl_pending(BIO *bio)
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| 387 | {
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| 388 | return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
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| 389 | }
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| 390 |
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| 391 | size_t BIO_ctrl_wpending(BIO *bio)
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| 392 | {
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| 393 | return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
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| 394 | }
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| 395 |
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| 396 | /* put the 'bio' on the end of b's list of operators */
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| 397 | BIO *BIO_push(BIO *b, BIO *bio)
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| 398 | {
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| 399 | BIO *lb;
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| 400 |
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| 401 | if (b == NULL)
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| 402 | return (bio);
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| 403 | lb = b;
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| 404 | while (lb->next_bio != NULL)
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| 405 | lb = lb->next_bio;
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| 406 | lb->next_bio = bio;
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| 407 | if (bio != NULL)
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| 408 | bio->prev_bio = lb;
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| 409 | /* called to do internal processing */
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| 410 | BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
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| 411 | return (b);
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| 412 | }
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| 413 |
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| 414 | /* Remove the first and return the rest */
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| 415 | BIO *BIO_pop(BIO *b)
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| 416 | {
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| 417 | BIO *ret;
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| 418 |
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| 419 | if (b == NULL)
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| 420 | return (NULL);
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| 421 | ret = b->next_bio;
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| 422 |
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| 423 | BIO_ctrl(b, BIO_CTRL_POP, 0, b);
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| 424 |
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| 425 | if (b->prev_bio != NULL)
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| 426 | b->prev_bio->next_bio = b->next_bio;
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| 427 | if (b->next_bio != NULL)
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| 428 | b->next_bio->prev_bio = b->prev_bio;
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| 429 |
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| 430 | b->next_bio = NULL;
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| 431 | b->prev_bio = NULL;
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| 432 | return (ret);
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| 433 | }
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| 434 |
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| 435 | BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
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| 436 | {
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| 437 | BIO *b, *last;
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| 438 |
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| 439 | b = last = bio;
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| 440 | for (;;) {
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| 441 | if (!BIO_should_retry(b))
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| 442 | break;
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| 443 | last = b;
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| 444 | b = b->next_bio;
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| 445 | if (b == NULL)
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| 446 | break;
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| 447 | }
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| 448 | if (reason != NULL)
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| 449 | *reason = last->retry_reason;
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| 450 | return (last);
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| 451 | }
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| 452 |
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| 453 | int BIO_get_retry_reason(BIO *bio)
|
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| 454 | {
|
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| 455 | return (bio->retry_reason);
|
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| 456 | }
|
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| 457 |
|
---|
| 458 | void BIO_set_retry_reason(BIO *bio, int reason)
|
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| 459 | {
|
---|
| 460 | bio->retry_reason = reason;
|
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| 461 | }
|
---|
| 462 |
|
---|
| 463 | BIO *BIO_find_type(BIO *bio, int type)
|
---|
| 464 | {
|
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| 465 | int mt, mask;
|
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| 466 |
|
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| 467 | if (bio == NULL)
|
---|
| 468 | return NULL;
|
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| 469 | mask = type & 0xff;
|
---|
| 470 | do {
|
---|
| 471 | if (bio->method != NULL) {
|
---|
| 472 | mt = bio->method->type;
|
---|
| 473 |
|
---|
| 474 | if (!mask) {
|
---|
| 475 | if (mt & type)
|
---|
| 476 | return (bio);
|
---|
| 477 | } else if (mt == type)
|
---|
| 478 | return (bio);
|
---|
| 479 | }
|
---|
| 480 | bio = bio->next_bio;
|
---|
| 481 | } while (bio != NULL);
|
---|
| 482 | return (NULL);
|
---|
| 483 | }
|
---|
| 484 |
|
---|
| 485 | BIO *BIO_next(BIO *b)
|
---|
| 486 | {
|
---|
| 487 | if (b == NULL)
|
---|
| 488 | return NULL;
|
---|
| 489 | return b->next_bio;
|
---|
| 490 | }
|
---|
| 491 |
|
---|
| 492 | void BIO_set_next(BIO *b, BIO *next)
|
---|
| 493 | {
|
---|
| 494 | b->next_bio = next;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | void BIO_free_all(BIO *bio)
|
---|
| 498 | {
|
---|
| 499 | BIO *b;
|
---|
| 500 | int ref;
|
---|
| 501 |
|
---|
| 502 | while (bio != NULL) {
|
---|
| 503 | b = bio;
|
---|
| 504 | ref = b->references;
|
---|
| 505 | bio = bio->next_bio;
|
---|
| 506 | BIO_free(b);
|
---|
| 507 | /* Since ref count > 1, don't free anyone else. */
|
---|
| 508 | if (ref > 1)
|
---|
| 509 | break;
|
---|
| 510 | }
|
---|
| 511 | }
|
---|
| 512 |
|
---|
| 513 | BIO *BIO_dup_chain(BIO *in)
|
---|
| 514 | {
|
---|
| 515 | BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
|
---|
| 516 |
|
---|
| 517 | for (bio = in; bio != NULL; bio = bio->next_bio) {
|
---|
| 518 | if ((new_bio = BIO_new(bio->method)) == NULL)
|
---|
| 519 | goto err;
|
---|
| 520 | new_bio->callback = bio->callback;
|
---|
| 521 | new_bio->cb_arg = bio->cb_arg;
|
---|
| 522 | new_bio->init = bio->init;
|
---|
| 523 | new_bio->shutdown = bio->shutdown;
|
---|
| 524 | new_bio->flags = bio->flags;
|
---|
| 525 |
|
---|
| 526 | /* This will let SSL_s_sock() work with stdin/stdout */
|
---|
| 527 | new_bio->num = bio->num;
|
---|
| 528 |
|
---|
| 529 | if (!BIO_dup_state(bio, (char *)new_bio)) {
|
---|
| 530 | BIO_free(new_bio);
|
---|
| 531 | goto err;
|
---|
| 532 | }
|
---|
| 533 |
|
---|
| 534 | /* copy app data */
|
---|
| 535 | if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
|
---|
| 536 | &bio->ex_data)) {
|
---|
| 537 | BIO_free(new_bio);
|
---|
| 538 | goto err;
|
---|
| 539 | }
|
---|
| 540 |
|
---|
| 541 | if (ret == NULL) {
|
---|
| 542 | eoc = new_bio;
|
---|
| 543 | ret = eoc;
|
---|
| 544 | } else {
|
---|
| 545 | BIO_push(eoc, new_bio);
|
---|
| 546 | eoc = new_bio;
|
---|
| 547 | }
|
---|
| 548 | }
|
---|
| 549 | return (ret);
|
---|
| 550 | err:
|
---|
| 551 | BIO_free_all(ret);
|
---|
| 552 |
|
---|
| 553 | return (NULL);
|
---|
| 554 | }
|
---|
| 555 |
|
---|
| 556 | void BIO_copy_next_retry(BIO *b)
|
---|
| 557 | {
|
---|
| 558 | BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
|
---|
| 559 | b->retry_reason = b->next_bio->retry_reason;
|
---|
| 560 | }
|
---|
| 561 |
|
---|
| 562 | int BIO_set_ex_data(BIO *bio, int idx, void *data)
|
---|
| 563 | {
|
---|
| 564 | return (CRYPTO_set_ex_data(&(bio->ex_data), idx, data));
|
---|
| 565 | }
|
---|
| 566 |
|
---|
| 567 | void *BIO_get_ex_data(BIO *bio, int idx)
|
---|
| 568 | {
|
---|
| 569 | return (CRYPTO_get_ex_data(&(bio->ex_data), idx));
|
---|
| 570 | }
|
---|
| 571 |
|
---|
| 572 | uint64_t BIO_number_read(BIO *bio)
|
---|
| 573 | {
|
---|
| 574 | if (bio)
|
---|
| 575 | return bio->num_read;
|
---|
| 576 | return 0;
|
---|
| 577 | }
|
---|
| 578 |
|
---|
| 579 | uint64_t BIO_number_written(BIO *bio)
|
---|
| 580 | {
|
---|
| 581 | if (bio)
|
---|
| 582 | return bio->num_write;
|
---|
| 583 | return 0;
|
---|
| 584 | }
|
---|
| 585 |
|
---|
| 586 | void bio_free_ex_data(BIO *bio)
|
---|
| 587 | {
|
---|
| 588 | CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
|
---|
| 589 | }
|
---|
| 590 |
|
---|
| 591 | void bio_cleanup(void)
|
---|
| 592 | {
|
---|
| 593 | #ifndef OPENSSL_NO_SOCK
|
---|
| 594 | bio_sock_cleanup_int();
|
---|
| 595 | CRYPTO_THREAD_lock_free(bio_lookup_lock);
|
---|
| 596 | bio_lookup_lock = NULL;
|
---|
| 597 | #endif
|
---|
| 598 | CRYPTO_THREAD_lock_free(bio_type_lock);
|
---|
| 599 | bio_type_lock = NULL;
|
---|
| 600 | }
|
---|