26a7d938c9
Since return is inconsistent, I removed unnecessary parentheses and unified them. Reviewed-by: Rich Salz <rsalz@openssl.org> Reviewed-by: Matt Caswell <matt@openssl.org> (Merged from https://github.com/openssl/openssl/pull/4541)
786 lines
17 KiB
C
786 lines
17 KiB
C
/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (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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#include <stdio.h>
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#include <errno.h>
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#include <openssl/crypto.h>
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#include "bio_lcl.h"
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#include "internal/cryptlib.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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/*
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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, size_t *processed)
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{
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long ret;
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int bareoper;
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if (b->callback_ex != NULL) {
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return b->callback_ex(b, oper, argp, len, argi, argl, inret, processed);
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}
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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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if (inret && (oper & BIO_CB_RETURN)) {
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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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}
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ret = b->callback(b, oper, argp, argi, argl, inret);
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if (ret >= 0 && (HAS_LEN_OPER(bareoper) || bareoper == BIO_CB_PUTS)) {
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*processed = (size_t)ret;
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ret = 1;
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}
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return ret;
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}
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BIO *BIO_new(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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BIOerr(BIO_F_BIO_NEW, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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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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BIOerr(BIO_F_BIO_NEW, 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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BIOerr(BIO_F_BIO_NEW, 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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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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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 (a->callback != NULL || a->callback_ex != NULL) {
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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 ret;
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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) ? 1 : 0);
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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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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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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) || (b->method == NULL) || (b->method->bread == NULL)) {
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BIOerr(BIO_F_BIO_READ_INTERN, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if ((b->callback != NULL || b->callback_ex != NULL) &&
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((ret = (int)bio_call_callback(b, BIO_CB_READ, data, dlen, 0, 0L, 1L,
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readbytes)) <= 0))
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return ret;
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if (!b->init) {
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BIOerr(BIO_F_BIO_READ_INTERN, BIO_R_UNINITIALIZED);
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return -2;
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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 (b->callback != NULL || b->callback_ex != NULL)
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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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BIOerr(BIO_F_BIO_READ_INTERN, 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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int ret;
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ret = bio_read_intern(b, data, dlen, readbytes);
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if (ret > 0)
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ret = 1;
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else
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ret = 0;
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return ret;
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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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int ret;
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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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BIOerr(BIO_F_BIO_WRITE_INTERN, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if ((b->callback != NULL || b->callback_ex != NULL) &&
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((ret = (int)bio_call_callback(b, BIO_CB_WRITE, data, dlen, 0, 0L, 1L,
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written)) <= 0))
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return ret;
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if (!b->init) {
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BIOerr(BIO_F_BIO_WRITE_INTERN, BIO_R_UNINITIALIZED);
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return -2;
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}
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ret = b->method->bwrite(b, data, dlen, written);
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if (ret > 0)
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b->num_write += (uint64_t)*written;
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if (b->callback != NULL || b->callback_ex != NULL)
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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, 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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int ret;
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ret = bio_write_intern(b, data, dlen, written);
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if (ret > 0)
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ret = 1;
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else
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ret = 0;
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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) || (b->method == NULL) || (b->method->bputs == NULL)) {
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BIOerr(BIO_F_BIO_PUTS, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if (b->callback != NULL || b->callback_ex != NULL) {
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ret = (int)bio_call_callback(b, BIO_CB_PUTS, buf, 0, 0, 0L, 1L, NULL);
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if (ret <= 0)
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return ret;
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}
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if (!b->init) {
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BIOerr(BIO_F_BIO_PUTS, BIO_R_UNINITIALIZED);
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return -2;
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}
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ret = b->method->bputs(b, buf);
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if (ret > 0) {
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b->num_write += (uint64_t)ret;
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written = ret;
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ret = 1;
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}
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if (b->callback != NULL || b->callback_ex != NULL)
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ret = (int)bio_call_callback(b, BIO_CB_PUTS | BIO_CB_RETURN, buf, 0, 0,
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0L, ret, &written);
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if (ret > 0) {
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if (written > INT_MAX) {
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BIOerr(BIO_F_BIO_PUTS, BIO_R_LENGTH_TOO_LONG);
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ret = -1;
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} else {
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ret = (int)written;
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}
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}
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return ret;
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}
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int BIO_gets(BIO *b, char *buf, int size)
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{
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int ret;
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size_t readbytes = 0;
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if ((b == NULL) || (b->method == NULL) || (b->method->bgets == NULL)) {
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BIOerr(BIO_F_BIO_GETS, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if (size < 0) {
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BIOerr(BIO_F_BIO_GETS, BIO_R_INVALID_ARGUMENT);
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return 0;
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}
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if (b->callback != NULL || b->callback_ex != NULL) {
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ret = (int)bio_call_callback(b, BIO_CB_GETS, buf, size, 0, 0L, 1, NULL);
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if (ret <= 0)
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return ret;
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}
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if (!b->init) {
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BIOerr(BIO_F_BIO_GETS, BIO_R_UNINITIALIZED);
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return -2;
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}
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ret = b->method->bgets(b, buf, size);
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if (ret > 0) {
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readbytes = ret;
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ret = 1;
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}
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if (b->callback != NULL || b->callback_ex != NULL)
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ret = (int)bio_call_callback(b, BIO_CB_GETS | BIO_CB_RETURN, buf, size,
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0, 0L, ret, &readbytes);
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if (ret > 0) {
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/* Shouldn't happen */
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if (readbytes > (size_t)size)
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ret = -1;
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else
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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_indent(BIO *b, int indent, int max)
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{
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if (indent < 0)
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indent = 0;
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if (indent > max)
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indent = max;
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while (indent--)
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if (BIO_puts(b, " ") != 1)
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return 0;
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return 1;
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}
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long BIO_int_ctrl(BIO *b, int cmd, long larg, int iarg)
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{
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int i;
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i = iarg;
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return BIO_ctrl(b, cmd, larg, (char *)&i);
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}
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void *BIO_ptr_ctrl(BIO *b, int cmd, long larg)
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{
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void *p = NULL;
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if (BIO_ctrl(b, cmd, larg, (char *)&p) <= 0)
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return NULL;
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else
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return p;
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}
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long BIO_ctrl(BIO *b, int cmd, long larg, void *parg)
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{
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long ret;
|
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|
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if (b == NULL)
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return 0;
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|
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if ((b->method == NULL) || (b->method->ctrl == NULL)) {
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BIOerr(BIO_F_BIO_CTRL, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
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if (b->callback != NULL || b->callback_ex != NULL) {
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ret = bio_call_callback(b, BIO_CB_CTRL, parg, 0, cmd, larg, 1L, NULL);
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if (ret <= 0)
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return ret;
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}
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ret = b->method->ctrl(b, cmd, larg, parg);
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|
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if (b->callback != NULL || b->callback_ex != NULL)
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ret = bio_call_callback(b, BIO_CB_CTRL | BIO_CB_RETURN, parg, 0, cmd,
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larg, ret, NULL);
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return ret;
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}
|
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|
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long BIO_callback_ctrl(BIO *b, int cmd,
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void (*fp) (struct bio_st *, int, const char *, int,
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long, long))
|
|
{
|
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long ret;
|
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|
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if (b == NULL)
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return 0;
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|
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if ((b->method == NULL) || (b->method->callback_ctrl == NULL)) {
|
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BIOerr(BIO_F_BIO_CALLBACK_CTRL, BIO_R_UNSUPPORTED_METHOD);
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return -2;
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}
|
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|
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if (b->callback != NULL || b->callback_ex != NULL) {
|
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ret = bio_call_callback(b, BIO_CB_CTRL, (void *)&fp, 0, cmd, 0, 1L,
|
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NULL);
|
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if (ret <= 0)
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return ret;
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}
|
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|
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ret = b->method->callback_ctrl(b, cmd, fp);
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|
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if (b->callback != NULL || b->callback_ex != NULL)
|
|
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)
|
|
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;
|
|
new_bio->callback = bio->callback;
|
|
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(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;
|
|
}
|