106 lines
2.2 KiB
C
106 lines
2.2 KiB
C
// Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) All rights reserved.
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// SPDX-License-Identifier: Apache-2.0
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#include <openssl/buf.h>
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#include <string.h>
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#include <openssl/mem.h>
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#include <openssl/err.h>
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#include "../internal.h"
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BUF_MEM *BUF_MEM_new(void) { return OPENSSL_zalloc(sizeof(BUF_MEM)); }
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void BUF_MEM_free(BUF_MEM *buf) {
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if (buf == NULL) {
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return;
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}
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OPENSSL_free(buf->data);
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OPENSSL_free(buf);
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}
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int BUF_MEM_reserve(BUF_MEM *buf, size_t cap) {
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if (buf->max >= cap) {
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return 1;
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}
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size_t n = cap + 3;
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if (n < cap) {
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OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
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return 0;
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}
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n = n / 3;
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size_t alloc_size = n * 4;
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if (alloc_size / 4 != n) {
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OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
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return 0;
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}
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char *new_buf = OPENSSL_realloc(buf->data, alloc_size);
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if (new_buf == NULL) {
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return 0;
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}
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buf->data = new_buf;
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buf->max = alloc_size;
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return 1;
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}
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size_t BUF_MEM_grow(BUF_MEM *buf, size_t len) {
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if (!BUF_MEM_reserve(buf, len)) {
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return 0;
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}
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if (buf->length < len) {
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OPENSSL_memset(&buf->data[buf->length], 0, len - buf->length);
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}
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buf->length = len;
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return len;
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}
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size_t BUF_MEM_grow_clean(BUF_MEM *buf, size_t len) {
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return BUF_MEM_grow(buf, len);
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}
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int BUF_MEM_append(BUF_MEM *buf, const void *in, size_t len) {
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// Work around a C language bug. See https://crbug.com/1019588.
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if (len == 0) {
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return 1;
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}
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size_t new_len = buf->length + len;
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if (new_len < len) {
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OPENSSL_PUT_ERROR(BUF, ERR_R_OVERFLOW);
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return 0;
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}
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if (!BUF_MEM_reserve(buf, new_len)) {
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return 0;
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}
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OPENSSL_memcpy(buf->data + buf->length, in, len);
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buf->length = new_len;
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return 1;
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}
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char *BUF_strdup(const char *str) { return OPENSSL_strdup(str); }
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size_t BUF_strnlen(const char *str, size_t max_len) {
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return OPENSSL_strnlen(str, max_len);
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}
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char *BUF_strndup(const char *str, size_t size) {
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return OPENSSL_strndup(str, size);
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}
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size_t BUF_strlcpy(char *dst, const char *src, size_t dst_size) {
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return OPENSSL_strlcpy(dst, src, dst_size);
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}
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size_t BUF_strlcat(char *dst, const char *src, size_t dst_size) {
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return OPENSSL_strlcat(dst, src, dst_size);
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}
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void *BUF_memdup(const void *data, size_t size) {
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return OPENSSL_memdup(data, size);
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}
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