mirror of
https://github.com/openssl/openssl.git
synced 2024-12-21 06:09:35 +08:00
e0c4e43e40
Reviewed-by: Tomas Mraz <tomas@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/18923)
1060 lines
25 KiB
C
1060 lines
25 KiB
C
/*
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* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#define OPENSSL_SUPPRESS_DEPRECATED
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#include <stdio.h>
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#include <errno.h>
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#include <openssl/crypto.h>
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#include "bio_local.h"
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/*
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* Helper macro for the callback to determine whether an operator expects a
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* len parameter or not
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*/
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#define HAS_LEN_OPER(o) ((o) == BIO_CB_READ || (o) == BIO_CB_WRITE \
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|| (o) == BIO_CB_GETS)
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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# define HAS_CALLBACK(b) ((b)->callback != NULL || (b)->callback_ex != NULL)
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#else
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# define HAS_CALLBACK(b) ((b)->callback_ex != NULL)
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#endif
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/*
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* Helper function to work out whether to call the new style callback or the old
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* one, and translate between the two.
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*
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* This has a long return type for consistency with the old callback. Similarly
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* for the "long" used for "inret"
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*/
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static long bio_call_callback(BIO *b, int oper, const char *argp, size_t len,
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int argi, long argl, long inret,
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size_t *processed)
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{
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long ret = inret;
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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int bareoper;
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if (b->callback_ex != NULL)
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#endif
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return b->callback_ex(b, oper, argp, len, argi, argl, inret, processed);
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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/* Strip off any BIO_CB_RETURN flag */
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bareoper = oper & ~BIO_CB_RETURN;
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/*
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* We have an old style callback, so we will have to do nasty casts and
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* check for overflows.
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*/
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if (HAS_LEN_OPER(bareoper)) {
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/* In this case |len| is set, and should be used instead of |argi| */
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if (len > INT_MAX)
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return -1;
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argi = (int)len;
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}
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if (inret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
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if (*processed > INT_MAX)
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return -1;
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inret = *processed;
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}
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ret = b->callback(b, oper, argp, argi, argl, inret);
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if (ret > 0 && (oper & BIO_CB_RETURN) && bareoper != BIO_CB_CTRL) {
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*processed = (size_t)ret;
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ret = 1;
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}
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#endif
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return ret;
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}
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BIO *BIO_new_ex(OSSL_LIB_CTX *libctx, const BIO_METHOD *method)
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{
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BIO *bio = OPENSSL_zalloc(sizeof(*bio));
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if (bio == NULL) {
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ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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bio->libctx = libctx;
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bio->method = method;
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bio->shutdown = 1;
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bio->references = 1;
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if (!CRYPTO_new_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data))
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goto err;
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bio->lock = CRYPTO_THREAD_lock_new();
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if (bio->lock == NULL) {
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ERR_raise(ERR_LIB_BIO, ERR_R_MALLOC_FAILURE);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
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goto err;
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}
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if (method->create != NULL && !method->create(bio)) {
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ERR_raise(ERR_LIB_BIO, ERR_R_INIT_FAIL);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
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CRYPTO_THREAD_lock_free(bio->lock);
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goto err;
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}
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if (method->create == NULL)
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bio->init = 1;
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return bio;
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err:
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OPENSSL_free(bio);
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return NULL;
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}
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BIO *BIO_new(const BIO_METHOD *method)
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{
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return BIO_new_ex(NULL, method);
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}
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int BIO_free(BIO *a)
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{
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int ret;
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if (a == NULL)
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return 0;
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if (CRYPTO_DOWN_REF(&a->references, &ret, a->lock) <= 0)
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return 0;
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REF_PRINT_COUNT("BIO", a);
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if (ret > 0)
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return 1;
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REF_ASSERT_ISNT(ret < 0);
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if (HAS_CALLBACK(a)) {
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ret = (int)bio_call_callback(a, BIO_CB_FREE, NULL, 0, 0, 0L, 1L, NULL);
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if (ret <= 0)
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return 0;
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}
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if ((a->method != NULL) && (a->method->destroy != NULL))
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a->method->destroy(a);
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CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, a, &a->ex_data);
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CRYPTO_THREAD_lock_free(a->lock);
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OPENSSL_free(a);
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return 1;
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}
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void BIO_set_data(BIO *a, void *ptr)
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{
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a->ptr = ptr;
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}
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void *BIO_get_data(BIO *a)
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{
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return a->ptr;
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}
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void BIO_set_init(BIO *a, int init)
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{
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a->init = init;
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}
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int BIO_get_init(BIO *a)
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{
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return a->init;
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}
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void BIO_set_shutdown(BIO *a, int shut)
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{
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a->shutdown = shut;
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}
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int BIO_get_shutdown(BIO *a)
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{
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return a->shutdown;
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}
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void BIO_vfree(BIO *a)
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{
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BIO_free(a);
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}
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int BIO_up_ref(BIO *a)
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{
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int i;
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if (CRYPTO_UP_REF(&a->references, &i, a->lock) <= 0)
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return 0;
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REF_PRINT_COUNT("BIO", a);
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REF_ASSERT_ISNT(i < 2);
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return i > 1;
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}
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void BIO_clear_flags(BIO *b, int flags)
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{
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b->flags &= ~flags;
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}
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int BIO_test_flags(const BIO *b, int flags)
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{
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return (b->flags & flags);
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}
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void BIO_set_flags(BIO *b, int flags)
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{
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b->flags |= flags;
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}
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#ifndef OPENSSL_NO_DEPRECATED_3_0
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BIO_callback_fn BIO_get_callback(const BIO *b)
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{
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return b->callback;
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}
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void BIO_set_callback(BIO *b, BIO_callback_fn cb)
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{
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b->callback = cb;
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}
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#endif
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BIO_callback_fn_ex BIO_get_callback_ex(const BIO *b)
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{
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return b->callback_ex;
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}
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void BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex cb)
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{
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b->callback_ex = cb;
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}
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void BIO_set_callback_arg(BIO *b, char *arg)
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{
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b->cb_arg = arg;
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}
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char *BIO_get_callback_arg(const BIO *b)
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{
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return b->cb_arg;
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}
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const char *BIO_method_name(const BIO *b)
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{
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return b->method->name;
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}
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int BIO_method_type(const BIO *b)
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{
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return b->method->type;
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}
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/*
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* This is essentially the same as BIO_read_ex() except that it allows
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* 0 or a negative value to indicate failure (retryable or not) in the return.
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* This is for compatibility with the old style BIO_read(), where existing code
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* may make assumptions about the return value that it might get.
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*/
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static int bio_read_intern(BIO *b, void *data, size_t dlen, size_t *readbytes)
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{
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int ret;
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if (b == NULL) {
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ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
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return -1;
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}
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if (b->method == NULL || b->method->bread == NULL) {
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ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if (HAS_CALLBACK(b) &&
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((ret = (int)bio_call_callback(b, BIO_CB_READ, data, dlen, 0, 0L, 1L,
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NULL)) <= 0))
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return ret;
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if (!b->init) {
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ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
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return -1;
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}
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ret = b->method->bread(b, data, dlen, readbytes);
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if (ret > 0)
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b->num_read += (uint64_t)*readbytes;
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if (HAS_CALLBACK(b))
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ret = (int)bio_call_callback(b, BIO_CB_READ | BIO_CB_RETURN, data,
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dlen, 0, 0L, ret, readbytes);
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/* Shouldn't happen */
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if (ret > 0 && *readbytes > dlen) {
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ERR_raise(ERR_LIB_BIO, ERR_R_INTERNAL_ERROR);
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return -1;
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}
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return ret;
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}
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int BIO_read(BIO *b, void *data, int dlen)
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{
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size_t readbytes;
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int ret;
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if (dlen < 0)
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return 0;
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ret = bio_read_intern(b, data, (size_t)dlen, &readbytes);
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if (ret > 0) {
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/* *readbytes should always be <= dlen */
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ret = (int)readbytes;
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}
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return ret;
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}
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int BIO_read_ex(BIO *b, void *data, size_t dlen, size_t *readbytes)
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{
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return bio_read_intern(b, data, dlen, readbytes) > 0;
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}
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static int bio_write_intern(BIO *b, const void *data, size_t dlen,
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size_t *written)
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{
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size_t local_written;
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int ret;
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if (written != NULL)
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*written = 0;
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/*
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* b == NULL is not an error but just means that zero bytes are written.
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* Do not raise an error here.
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*/
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if (b == NULL)
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return 0;
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if (b->method == NULL || b->method->bwrite == NULL) {
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ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if (HAS_CALLBACK(b) &&
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((ret = (int)bio_call_callback(b, BIO_CB_WRITE, data, dlen, 0, 0L, 1L,
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NULL)) <= 0))
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return ret;
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if (!b->init) {
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ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
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return -1;
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}
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ret = b->method->bwrite(b, data, dlen, &local_written);
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if (ret > 0)
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b->num_write += (uint64_t)local_written;
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if (HAS_CALLBACK(b))
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ret = (int)bio_call_callback(b, BIO_CB_WRITE | BIO_CB_RETURN, data,
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dlen, 0, 0L, ret, &local_written);
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if (written != NULL)
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*written = local_written;
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return ret;
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}
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int BIO_write(BIO *b, const void *data, int dlen)
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{
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size_t written;
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int ret;
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if (dlen <= 0)
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return 0;
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ret = bio_write_intern(b, data, (size_t)dlen, &written);
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if (ret > 0) {
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/* written should always be <= dlen */
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ret = (int)written;
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}
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return ret;
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}
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int BIO_write_ex(BIO *b, const void *data, size_t dlen, size_t *written)
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{
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return bio_write_intern(b, data, dlen, written) > 0
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|| (b != NULL && dlen == 0); /* order is important for *written */
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}
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int BIO_sendmmsg(BIO *b, BIO_MSG *msg,
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size_t stride, size_t num_msg, uint64_t flags,
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size_t *msgs_processed)
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{
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size_t ret;
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BIO_MMSG_CB_ARGS args;
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if (b == NULL) {
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*msgs_processed = 0;
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ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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if (b->method == NULL || b->method->bsendmmsg == NULL) {
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*msgs_processed = 0;
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ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
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return 0;
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}
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if (HAS_CALLBACK(b)) {
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args.msg = msg;
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args.stride = stride;
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args.num_msg = num_msg;
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args.flags = flags;
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args.msgs_processed = msgs_processed;
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ret = (size_t)bio_call_callback(b, BIO_CB_SENDMMSG, (void *)&args,
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0, 0, 0, 0, NULL);
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if (ret == 0)
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return 0;
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}
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if (!b->init) {
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*msgs_processed = 0;
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ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
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return 0;
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}
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ret = b->method->bsendmmsg(b, msg, stride, num_msg, flags, msgs_processed);
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if (HAS_CALLBACK(b))
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ret = (size_t)bio_call_callback(b, BIO_CB_SENDMMSG | BIO_CB_RETURN,
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(void *)&args, ret, 0, 0, 0, NULL);
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return ret;
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}
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int BIO_recvmmsg(BIO *b, BIO_MSG *msg,
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size_t stride, size_t num_msg, uint64_t flags,
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size_t *msgs_processed)
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{
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size_t ret;
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BIO_MMSG_CB_ARGS args;
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|
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if (b == NULL) {
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*msgs_processed = 0;
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ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
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return 0;
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}
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|
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if (b->method == NULL || b->method->brecvmmsg == NULL) {
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*msgs_processed = 0;
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ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
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return 0;
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}
|
|
|
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if (HAS_CALLBACK(b)) {
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args.msg = msg;
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args.stride = stride;
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args.num_msg = num_msg;
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args.flags = flags;
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args.msgs_processed = msgs_processed;
|
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ret = bio_call_callback(b, BIO_CB_RECVMMSG, (void *)&args,
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0, 0, 0, 0, NULL);
|
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if (ret == 0)
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return 0;
|
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}
|
|
|
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if (!b->init) {
|
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*msgs_processed = 0;
|
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ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
|
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return 0;
|
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}
|
|
|
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ret = b->method->brecvmmsg(b, msg, stride, num_msg, flags, msgs_processed);
|
|
|
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if (HAS_CALLBACK(b))
|
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ret = (size_t)bio_call_callback(b, BIO_CB_RECVMMSG | BIO_CB_RETURN,
|
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(void *)&args, ret, 0, 0, 0, NULL);
|
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|
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return ret;
|
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}
|
|
|
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int BIO_puts(BIO *b, const char *buf)
|
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{
|
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int ret;
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size_t written = 0;
|
|
|
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if (b == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return -1;
|
|
}
|
|
if (b->method == NULL || b->method->bputs == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
|
|
return -2;
|
|
}
|
|
|
|
if (HAS_CALLBACK(b)) {
|
|
ret = (int)bio_call_callback(b, BIO_CB_PUTS, buf, 0, 0, 0L, 1L, NULL);
|
|
if (ret <= 0)
|
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return ret;
|
|
}
|
|
|
|
if (!b->init) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
|
|
return -1;
|
|
}
|
|
|
|
ret = b->method->bputs(b, buf);
|
|
|
|
if (ret > 0) {
|
|
b->num_write += (uint64_t)ret;
|
|
written = ret;
|
|
ret = 1;
|
|
}
|
|
|
|
if (HAS_CALLBACK(b))
|
|
ret = (int)bio_call_callback(b, BIO_CB_PUTS | BIO_CB_RETURN, buf, 0, 0,
|
|
0L, ret, &written);
|
|
|
|
if (ret > 0) {
|
|
if (written > INT_MAX) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_LENGTH_TOO_LONG);
|
|
ret = -1;
|
|
} else {
|
|
ret = (int)written;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int BIO_gets(BIO *b, char *buf, int size)
|
|
{
|
|
int ret;
|
|
size_t readbytes = 0;
|
|
|
|
if (b == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return -1;
|
|
}
|
|
if (b->method == NULL || b->method->bgets == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
|
|
return -2;
|
|
}
|
|
|
|
if (size < 0) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_ARGUMENT);
|
|
return -1;
|
|
}
|
|
|
|
if (HAS_CALLBACK(b)) {
|
|
ret = (int)bio_call_callback(b, BIO_CB_GETS, buf, size, 0, 0L, 1, NULL);
|
|
if (ret <= 0)
|
|
return ret;
|
|
}
|
|
|
|
if (!b->init) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
|
|
return -1;
|
|
}
|
|
|
|
ret = b->method->bgets(b, buf, size);
|
|
|
|
if (ret > 0) {
|
|
readbytes = ret;
|
|
ret = 1;
|
|
}
|
|
|
|
if (HAS_CALLBACK(b))
|
|
ret = (int)bio_call_callback(b, BIO_CB_GETS | BIO_CB_RETURN, buf, size,
|
|
0, 0L, ret, &readbytes);
|
|
|
|
if (ret > 0) {
|
|
/* Shouldn't happen */
|
|
if (readbytes > (size_t)size)
|
|
ret = -1;
|
|
else
|
|
ret = (int)readbytes;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int BIO_get_line(BIO *bio, char *buf, int size)
|
|
{
|
|
int ret = 0;
|
|
char *ptr = buf;
|
|
|
|
if (buf == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return -1;
|
|
}
|
|
if (size <= 0) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_INVALID_ARGUMENT);
|
|
return -1;
|
|
}
|
|
*buf = '\0';
|
|
|
|
if (bio == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return -1;
|
|
}
|
|
if (!bio->init) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNINITIALIZED);
|
|
return -1;
|
|
}
|
|
|
|
while (size-- > 1 && (ret = BIO_read(bio, ptr, 1)) > 0)
|
|
if (*ptr++ == '\n')
|
|
break;
|
|
*ptr = '\0';
|
|
return ret > 0 || BIO_eof(bio) ? ptr - buf : ret;
|
|
}
|
|
|
|
int BIO_indent(BIO *b, int indent, int max)
|
|
{
|
|
if (indent < 0)
|
|
indent = 0;
|
|
if (indent > max)
|
|
indent = max;
|
|
while (indent--)
|
|
if (BIO_puts(b, " ") != 1)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
|
|
{
|
|
int i;
|
|
|
|
i = iarg;
|
|
return BIO_ctrl(b, cmd, larg, (char *)&i);
|
|
}
|
|
|
|
void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
|
|
{
|
|
void *p = NULL;
|
|
|
|
if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
|
|
return NULL;
|
|
else
|
|
return p;
|
|
}
|
|
|
|
long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
|
|
{
|
|
long ret;
|
|
|
|
if (b == NULL)
|
|
return -1;
|
|
if (b->method == NULL || b->method->ctrl == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
|
|
return -2;
|
|
}
|
|
|
|
if (HAS_CALLBACK(b)) {
|
|
ret = bio_call_callback(b, BIO_CB_CTRL, parg, 0, cmd, larg, 1L, NULL);
|
|
if (ret <= 0)
|
|
return ret;
|
|
}
|
|
|
|
ret = b->method->ctrl(b, cmd, larg, parg);
|
|
|
|
if (HAS_CALLBACK(b))
|
|
ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, 0, cmd,
|
|
larg, ret, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
long BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
|
|
{
|
|
long ret;
|
|
|
|
if (b == NULL)
|
|
return -2;
|
|
if (b->method == NULL || b->method->callback_ctrl == NULL
|
|
|| cmd != BIO_CTRL_SET_CALLBACK) {
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_UNSUPPORTED_METHOD);
|
|
return -2;
|
|
}
|
|
|
|
if (HAS_CALLBACK(b)) {
|
|
ret = bio_call_callback(b, BIO_CB_CTRL, (void *)&fp, 0, cmd, 0, 1L,
|
|
NULL);
|
|
if (ret <= 0)
|
|
return ret;
|
|
}
|
|
|
|
ret = b->method->callback_ctrl(b, cmd, fp);
|
|
|
|
if (HAS_CALLBACK(b))
|
|
ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN, (void *)&fp, 0,
|
|
cmd, 0, ret, NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* It is unfortunate to duplicate in functions what the BIO_(w)pending macros
|
|
* do; but those macros have inappropriate return type, and for interfacing
|
|
* from other programming languages, C macros aren't much of a help anyway.
|
|
*/
|
|
size_t BIO_ctrl_pending(BIO *bio)
|
|
{
|
|
return BIO_ctrl(bio, BIO_CTRL_PENDING, 0, NULL);
|
|
}
|
|
|
|
size_t BIO_ctrl_wpending(BIO *bio)
|
|
{
|
|
return BIO_ctrl(bio, BIO_CTRL_WPENDING, 0, NULL);
|
|
}
|
|
|
|
/* put the 'bio' on the end of b's list of operators */
|
|
BIO *BIO_push(BIO *b, BIO *bio)
|
|
{
|
|
BIO *lb;
|
|
|
|
if (b == NULL)
|
|
return bio;
|
|
lb = b;
|
|
while (lb->next_bio != NULL)
|
|
lb = lb->next_bio;
|
|
lb->next_bio = bio;
|
|
if (bio != NULL)
|
|
bio->prev_bio = lb;
|
|
/* called to do internal processing */
|
|
BIO_ctrl(b, BIO_CTRL_PUSH, 0, lb);
|
|
return b;
|
|
}
|
|
|
|
/* Remove the first and return the rest */
|
|
BIO *BIO_pop(BIO *b)
|
|
{
|
|
BIO *ret;
|
|
|
|
if (b == NULL)
|
|
return NULL;
|
|
ret = b->next_bio;
|
|
|
|
BIO_ctrl(b, BIO_CTRL_POP, 0, b);
|
|
|
|
if (b->prev_bio != NULL)
|
|
b->prev_bio->next_bio = b->next_bio;
|
|
if (b->next_bio != NULL)
|
|
b->next_bio->prev_bio = b->prev_bio;
|
|
|
|
b->next_bio = NULL;
|
|
b->prev_bio = NULL;
|
|
return ret;
|
|
}
|
|
|
|
BIO *BIO_get_retry_BIO(BIO *bio, int *reason)
|
|
{
|
|
BIO *b, *last;
|
|
|
|
b = last = bio;
|
|
for (;;) {
|
|
if (!BIO_should_retry(b))
|
|
break;
|
|
last = b;
|
|
b = b->next_bio;
|
|
if (b == NULL)
|
|
break;
|
|
}
|
|
if (reason != NULL)
|
|
*reason = last->retry_reason;
|
|
return last;
|
|
}
|
|
|
|
int BIO_get_retry_reason(BIO *bio)
|
|
{
|
|
return bio->retry_reason;
|
|
}
|
|
|
|
void BIO_set_retry_reason(BIO *bio, int reason)
|
|
{
|
|
bio->retry_reason = reason;
|
|
}
|
|
|
|
BIO *BIO_find_type(BIO *bio, int type)
|
|
{
|
|
int mt, mask;
|
|
|
|
if (bio == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return NULL;
|
|
}
|
|
mask = type & 0xff;
|
|
do {
|
|
if (bio->method != NULL) {
|
|
mt = bio->method->type;
|
|
|
|
if (!mask) {
|
|
if (mt & type)
|
|
return bio;
|
|
} else if (mt == type) {
|
|
return bio;
|
|
}
|
|
}
|
|
bio = bio->next_bio;
|
|
} while (bio != NULL);
|
|
return NULL;
|
|
}
|
|
|
|
BIO *BIO_next(BIO *b)
|
|
{
|
|
if (b == NULL)
|
|
return NULL;
|
|
return b->next_bio;
|
|
}
|
|
|
|
void BIO_set_next(BIO *b, BIO *next)
|
|
{
|
|
b->next_bio = next;
|
|
}
|
|
|
|
void BIO_free_all(BIO *bio)
|
|
{
|
|
BIO *b;
|
|
int ref;
|
|
|
|
while (bio != NULL) {
|
|
b = bio;
|
|
ref = b->references;
|
|
bio = bio->next_bio;
|
|
BIO_free(b);
|
|
/* Since ref count > 1, don't free anyone else. */
|
|
if (ref > 1)
|
|
break;
|
|
}
|
|
}
|
|
|
|
BIO *BIO_dup_chain(BIO *in)
|
|
{
|
|
BIO *ret = NULL, *eoc = NULL, *bio, *new_bio;
|
|
|
|
for (bio = in; bio != NULL; bio = bio->next_bio) {
|
|
if ((new_bio = BIO_new(bio->method)) == NULL)
|
|
goto err;
|
|
#ifndef OPENSSL_NO_DEPRECATED_3_0
|
|
new_bio->callback = bio->callback;
|
|
#endif
|
|
new_bio->callback_ex = bio->callback_ex;
|
|
new_bio->cb_arg = bio->cb_arg;
|
|
new_bio->init = bio->init;
|
|
new_bio->shutdown = bio->shutdown;
|
|
new_bio->flags = bio->flags;
|
|
|
|
/* This will let SSL_s_sock() work with stdin/stdout */
|
|
new_bio->num = bio->num;
|
|
|
|
if (!BIO_dup_state(bio, (char *)new_bio)) {
|
|
BIO_free(new_bio);
|
|
goto err;
|
|
}
|
|
|
|
/* copy app data */
|
|
if (!CRYPTO_dup_ex_data(CRYPTO_EX_INDEX_BIO, &new_bio->ex_data,
|
|
&bio->ex_data)) {
|
|
BIO_free(new_bio);
|
|
goto err;
|
|
}
|
|
|
|
if (ret == NULL) {
|
|
eoc = new_bio;
|
|
ret = eoc;
|
|
} else {
|
|
BIO_push(eoc, new_bio);
|
|
eoc = new_bio;
|
|
}
|
|
}
|
|
return ret;
|
|
err:
|
|
BIO_free_all(ret);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
void BIO_copy_next_retry(BIO *b)
|
|
{
|
|
BIO_set_flags(b, BIO_get_retry_flags(b->next_bio));
|
|
b->retry_reason = b->next_bio->retry_reason;
|
|
}
|
|
|
|
int BIO_set_ex_data(BIO *bio, int idx, void *data)
|
|
{
|
|
return CRYPTO_set_ex_data(&(bio->ex_data), idx, data);
|
|
}
|
|
|
|
void *BIO_get_ex_data(const BIO *bio, int idx)
|
|
{
|
|
return CRYPTO_get_ex_data(&(bio->ex_data), idx);
|
|
}
|
|
|
|
uint64_t BIO_number_read(BIO *bio)
|
|
{
|
|
if (bio)
|
|
return bio->num_read;
|
|
return 0;
|
|
}
|
|
|
|
uint64_t BIO_number_written(BIO *bio)
|
|
{
|
|
if (bio)
|
|
return bio->num_write;
|
|
return 0;
|
|
}
|
|
|
|
void bio_free_ex_data(BIO *bio)
|
|
{
|
|
CRYPTO_free_ex_data(CRYPTO_EX_INDEX_BIO, bio, &bio->ex_data);
|
|
}
|
|
|
|
void bio_cleanup(void)
|
|
{
|
|
#ifndef OPENSSL_NO_SOCK
|
|
bio_sock_cleanup_int();
|
|
CRYPTO_THREAD_lock_free(bio_lookup_lock);
|
|
bio_lookup_lock = NULL;
|
|
#endif
|
|
CRYPTO_THREAD_lock_free(bio_type_lock);
|
|
bio_type_lock = NULL;
|
|
}
|
|
|
|
/* Internal variant of the below BIO_wait() not calling BIOerr() */
|
|
static int bio_wait(BIO *bio, time_t max_time, unsigned int nap_milliseconds)
|
|
{
|
|
#ifndef OPENSSL_NO_SOCK
|
|
int fd;
|
|
#endif
|
|
long sec_diff;
|
|
|
|
if (max_time == 0) /* no timeout */
|
|
return 1;
|
|
|
|
#ifndef OPENSSL_NO_SOCK
|
|
if (BIO_get_fd(bio, &fd) > 0 && fd < FD_SETSIZE)
|
|
return BIO_socket_wait(fd, BIO_should_read(bio), max_time);
|
|
#endif
|
|
/* fall back to polling since no sockets are available */
|
|
|
|
sec_diff = (long)(max_time - time(NULL)); /* might overflow */
|
|
if (sec_diff < 0)
|
|
return 0; /* clearly timeout */
|
|
|
|
/* now take a nap at most the given number of milliseconds */
|
|
if (sec_diff == 0) { /* we are below the 1 seconds resolution of max_time */
|
|
if (nap_milliseconds > 1000)
|
|
nap_milliseconds = 1000;
|
|
} else { /* for sec_diff > 0, take min(sec_diff * 1000, nap_milliseconds) */
|
|
if ((unsigned long)sec_diff * 1000 < nap_milliseconds)
|
|
nap_milliseconds = (unsigned int)sec_diff * 1000;
|
|
}
|
|
ossl_sleep(nap_milliseconds);
|
|
return 1;
|
|
}
|
|
|
|
/*-
|
|
* Wait on (typically socket-based) BIO at most until max_time.
|
|
* Succeed immediately if max_time == 0.
|
|
* If sockets are not available support polling: succeed after waiting at most
|
|
* the number of nap_milliseconds in order to avoid a tight busy loop.
|
|
* Call BIOerr(...) on timeout or error.
|
|
* Returns -1 on error, 0 on timeout, and 1 on success.
|
|
*/
|
|
int BIO_wait(BIO *bio, time_t max_time, unsigned int nap_milliseconds)
|
|
{
|
|
int rv = bio_wait(bio, max_time, nap_milliseconds);
|
|
|
|
if (rv <= 0)
|
|
ERR_raise(ERR_LIB_BIO,
|
|
rv == 0 ? BIO_R_TRANSFER_TIMEOUT : BIO_R_TRANSFER_ERROR);
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Connect via given BIO using BIO_do_connect() until success/timeout/error.
|
|
* Parameter timeout == 0 means no timeout, < 0 means exactly one try.
|
|
* For non-blocking and potentially even non-socket BIOs perform polling with
|
|
* the given density: between polls sleep nap_milliseconds using BIO_wait()
|
|
* in order to avoid a tight busy loop.
|
|
* Returns -1 on error, 0 on timeout, and 1 on success.
|
|
*/
|
|
int BIO_do_connect_retry(BIO *bio, int timeout, int nap_milliseconds)
|
|
{
|
|
int blocking = timeout <= 0;
|
|
time_t max_time = timeout > 0 ? time(NULL) + timeout : 0;
|
|
int rv;
|
|
|
|
if (bio == NULL) {
|
|
ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
|
|
return -1;
|
|
}
|
|
|
|
if (nap_milliseconds < 0)
|
|
nap_milliseconds = 100;
|
|
BIO_set_nbio(bio, !blocking);
|
|
|
|
retry:
|
|
ERR_set_mark();
|
|
rv = BIO_do_connect(bio);
|
|
|
|
if (rv <= 0) { /* could be timeout or retryable error or fatal error */
|
|
int err = ERR_peek_last_error();
|
|
int reason = ERR_GET_REASON(err);
|
|
int do_retry = BIO_should_retry(bio); /* may be 1 only if !blocking */
|
|
|
|
if (ERR_GET_LIB(err) == ERR_LIB_BIO) {
|
|
switch (reason) {
|
|
case ERR_R_SYS_LIB:
|
|
/*
|
|
* likely retryable system error occurred, which may be
|
|
* EAGAIN (resource temporarily unavailable) some 40 secs after
|
|
* calling getaddrinfo(): Temporary failure in name resolution
|
|
* or a premature ETIMEDOUT, some 30 seconds after connect()
|
|
*/
|
|
case BIO_R_CONNECT_ERROR:
|
|
case BIO_R_NBIO_CONNECT_ERROR:
|
|
/* some likely retryable connection error occurred */
|
|
(void)BIO_reset(bio); /* often needed to avoid retry failure */
|
|
do_retry = 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
if (timeout >= 0 && do_retry) {
|
|
ERR_pop_to_mark();
|
|
/* will not actually wait if timeout == 0 (i.e., blocking BIO): */
|
|
rv = bio_wait(bio, max_time, nap_milliseconds);
|
|
if (rv > 0)
|
|
goto retry;
|
|
ERR_raise(ERR_LIB_BIO,
|
|
rv == 0 ? BIO_R_CONNECT_TIMEOUT : BIO_R_CONNECT_ERROR);
|
|
} else {
|
|
ERR_clear_last_mark();
|
|
rv = -1;
|
|
if (err == 0) /* missing error queue entry */
|
|
/* workaround: general error */
|
|
ERR_raise(ERR_LIB_BIO, BIO_R_CONNECT_ERROR);
|
|
}
|
|
} else {
|
|
ERR_clear_last_mark();
|
|
}
|
|
|
|
return rv;
|
|
}
|