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706457b7bd
Apart from public and internal header files, there is a third type called local header files, which are located next to source files in the source directory. Currently, they have different suffixes like '*_lcl.h', '*_local.h', or '*_int.h' This commit changes the different suffixes to '*_local.h' uniformly. Reviewed-by: Richard Levitte <levitte@openssl.org> (Merged from https://github.com/openssl/openssl/pull/9333)
476 lines
12 KiB
C
476 lines
12 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 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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#include <stdio.h>
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#include <errno.h>
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#include "bio_local.h"
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#include "internal/cryptlib.h"
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static int buffer_write(BIO *h, const char *buf, int num);
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static int buffer_read(BIO *h, char *buf, int size);
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static int buffer_puts(BIO *h, const char *str);
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static int buffer_gets(BIO *h, char *str, int size);
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static long buffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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static int buffer_new(BIO *h);
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static int buffer_free(BIO *data);
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static long buffer_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
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#define DEFAULT_BUFFER_SIZE 4096
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static const BIO_METHOD methods_buffer = {
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BIO_TYPE_BUFFER,
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"buffer",
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/* TODO: Convert to new style write function */
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bwrite_conv,
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buffer_write,
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/* TODO: Convert to new style read function */
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bread_conv,
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buffer_read,
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buffer_puts,
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buffer_gets,
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buffer_ctrl,
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buffer_new,
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buffer_free,
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buffer_callback_ctrl,
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};
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const BIO_METHOD *BIO_f_buffer(void)
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{
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return &methods_buffer;
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}
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static int buffer_new(BIO *bi)
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{
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BIO_F_BUFFER_CTX *ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx == NULL)
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return 0;
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ctx->ibuf_size = DEFAULT_BUFFER_SIZE;
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ctx->ibuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
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if (ctx->ibuf == NULL) {
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OPENSSL_free(ctx);
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return 0;
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}
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ctx->obuf_size = DEFAULT_BUFFER_SIZE;
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ctx->obuf = OPENSSL_malloc(DEFAULT_BUFFER_SIZE);
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if (ctx->obuf == NULL) {
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OPENSSL_free(ctx->ibuf);
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OPENSSL_free(ctx);
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return 0;
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}
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bi->init = 1;
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bi->ptr = (char *)ctx;
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bi->flags = 0;
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return 1;
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}
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static int buffer_free(BIO *a)
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{
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BIO_F_BUFFER_CTX *b;
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if (a == NULL)
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return 0;
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b = (BIO_F_BUFFER_CTX *)a->ptr;
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OPENSSL_free(b->ibuf);
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OPENSSL_free(b->obuf);
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OPENSSL_free(a->ptr);
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a->ptr = NULL;
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a->init = 0;
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a->flags = 0;
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return 1;
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}
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static int buffer_read(BIO *b, char *out, int outl)
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{
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int i, num = 0;
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BIO_F_BUFFER_CTX *ctx;
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if (out == NULL)
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return 0;
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ctx = (BIO_F_BUFFER_CTX *)b->ptr;
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if ((ctx == NULL) || (b->next_bio == NULL))
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return 0;
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num = 0;
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BIO_clear_retry_flags(b);
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start:
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i = ctx->ibuf_len;
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/* If there is stuff left over, grab it */
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if (i != 0) {
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if (i > outl)
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i = outl;
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memcpy(out, &(ctx->ibuf[ctx->ibuf_off]), i);
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ctx->ibuf_off += i;
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ctx->ibuf_len -= i;
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num += i;
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if (outl == i)
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return num;
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outl -= i;
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out += i;
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}
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/*
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* We may have done a partial read. try to do more. We have nothing in
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* the buffer. If we get an error and have read some data, just return it
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* and let them retry to get the error again. copy direct to parent
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* address space
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*/
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if (outl > ctx->ibuf_size) {
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for (;;) {
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i = BIO_read(b->next_bio, out, outl);
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if (i <= 0) {
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BIO_copy_next_retry(b);
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if (i < 0)
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return ((num > 0) ? num : i);
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if (i == 0)
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return num;
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}
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num += i;
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if (outl == i)
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return num;
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out += i;
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outl -= i;
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}
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}
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/* else */
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/* we are going to be doing some buffering */
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i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
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if (i <= 0) {
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BIO_copy_next_retry(b);
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if (i < 0)
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return ((num > 0) ? num : i);
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if (i == 0)
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return num;
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}
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ctx->ibuf_off = 0;
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ctx->ibuf_len = i;
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/* Lets re-read using ourselves :-) */
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goto start;
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}
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static int buffer_write(BIO *b, const char *in, int inl)
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{
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int i, num = 0;
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BIO_F_BUFFER_CTX *ctx;
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if ((in == NULL) || (inl <= 0))
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return 0;
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ctx = (BIO_F_BUFFER_CTX *)b->ptr;
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if ((ctx == NULL) || (b->next_bio == NULL))
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return 0;
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BIO_clear_retry_flags(b);
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start:
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i = ctx->obuf_size - (ctx->obuf_len + ctx->obuf_off);
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/* add to buffer and return */
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if (i >= inl) {
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memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, inl);
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ctx->obuf_len += inl;
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return (num + inl);
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}
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/* else */
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/* stuff already in buffer, so add to it first, then flush */
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if (ctx->obuf_len != 0) {
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if (i > 0) { /* lets fill it up if we can */
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memcpy(&(ctx->obuf[ctx->obuf_off + ctx->obuf_len]), in, i);
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in += i;
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inl -= i;
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num += i;
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ctx->obuf_len += i;
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}
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/* we now have a full buffer needing flushing */
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for (;;) {
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i = BIO_write(b->next_bio, &(ctx->obuf[ctx->obuf_off]),
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ctx->obuf_len);
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if (i <= 0) {
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BIO_copy_next_retry(b);
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if (i < 0)
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return ((num > 0) ? num : i);
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if (i == 0)
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return num;
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}
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ctx->obuf_off += i;
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ctx->obuf_len -= i;
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if (ctx->obuf_len == 0)
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break;
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}
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}
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/*
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* we only get here if the buffer has been flushed and we still have
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* stuff to write
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*/
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ctx->obuf_off = 0;
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/* we now have inl bytes to write */
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while (inl >= ctx->obuf_size) {
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i = BIO_write(b->next_bio, in, inl);
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if (i <= 0) {
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BIO_copy_next_retry(b);
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if (i < 0)
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return ((num > 0) ? num : i);
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if (i == 0)
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return num;
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}
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num += i;
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in += i;
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inl -= i;
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if (inl == 0)
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return num;
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}
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/*
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* copy the rest into the buffer since we have only a small amount left
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*/
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goto start;
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}
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static long buffer_ctrl(BIO *b, int cmd, long num, void *ptr)
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{
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BIO *dbio;
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BIO_F_BUFFER_CTX *ctx;
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long ret = 1;
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char *p1, *p2;
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int r, i, *ip;
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int ibs, obs;
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ctx = (BIO_F_BUFFER_CTX *)b->ptr;
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switch (cmd) {
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case BIO_CTRL_RESET:
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ctx->ibuf_off = 0;
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ctx->ibuf_len = 0;
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ctx->obuf_off = 0;
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ctx->obuf_len = 0;
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if (b->next_bio == NULL)
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return 0;
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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break;
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case BIO_CTRL_EOF:
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if (ctx->ibuf_len > 0)
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return 0;
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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break;
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case BIO_CTRL_INFO:
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ret = (long)ctx->obuf_len;
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break;
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case BIO_C_GET_BUFF_NUM_LINES:
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ret = 0;
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p1 = ctx->ibuf;
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for (i = 0; i < ctx->ibuf_len; i++) {
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if (p1[ctx->ibuf_off + i] == '\n')
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ret++;
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}
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break;
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case BIO_CTRL_WPENDING:
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ret = (long)ctx->obuf_len;
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if (ret == 0) {
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if (b->next_bio == NULL)
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return 0;
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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}
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break;
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case BIO_CTRL_PENDING:
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ret = (long)ctx->ibuf_len;
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if (ret == 0) {
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if (b->next_bio == NULL)
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return 0;
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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}
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break;
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case BIO_C_SET_BUFF_READ_DATA:
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if (num > ctx->ibuf_size) {
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p1 = OPENSSL_malloc((int)num);
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if (p1 == NULL)
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goto malloc_error;
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OPENSSL_free(ctx->ibuf);
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ctx->ibuf = p1;
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}
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ctx->ibuf_off = 0;
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ctx->ibuf_len = (int)num;
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memcpy(ctx->ibuf, ptr, (int)num);
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ret = 1;
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break;
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case BIO_C_SET_BUFF_SIZE:
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if (ptr != NULL) {
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ip = (int *)ptr;
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if (*ip == 0) {
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ibs = (int)num;
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obs = ctx->obuf_size;
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} else { /* if (*ip == 1) */
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ibs = ctx->ibuf_size;
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obs = (int)num;
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}
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} else {
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ibs = (int)num;
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obs = (int)num;
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}
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p1 = ctx->ibuf;
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p2 = ctx->obuf;
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if ((ibs > DEFAULT_BUFFER_SIZE) && (ibs != ctx->ibuf_size)) {
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p1 = OPENSSL_malloc((int)num);
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if (p1 == NULL)
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goto malloc_error;
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}
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if ((obs > DEFAULT_BUFFER_SIZE) && (obs != ctx->obuf_size)) {
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p2 = OPENSSL_malloc((int)num);
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if (p2 == NULL) {
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if (p1 != ctx->ibuf)
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OPENSSL_free(p1);
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goto malloc_error;
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}
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}
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if (ctx->ibuf != p1) {
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OPENSSL_free(ctx->ibuf);
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ctx->ibuf = p1;
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ctx->ibuf_off = 0;
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ctx->ibuf_len = 0;
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ctx->ibuf_size = ibs;
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}
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if (ctx->obuf != p2) {
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OPENSSL_free(ctx->obuf);
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ctx->obuf = p2;
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ctx->obuf_off = 0;
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ctx->obuf_len = 0;
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ctx->obuf_size = obs;
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}
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break;
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case BIO_C_DO_STATE_MACHINE:
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if (b->next_bio == NULL)
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return 0;
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BIO_clear_retry_flags(b);
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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BIO_copy_next_retry(b);
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break;
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case BIO_CTRL_FLUSH:
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if (b->next_bio == NULL)
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return 0;
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if (ctx->obuf_len <= 0) {
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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break;
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}
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for (;;) {
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BIO_clear_retry_flags(b);
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if (ctx->obuf_len > 0) {
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r = BIO_write(b->next_bio,
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&(ctx->obuf[ctx->obuf_off]), ctx->obuf_len);
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BIO_copy_next_retry(b);
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if (r <= 0)
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return (long)r;
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ctx->obuf_off += r;
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ctx->obuf_len -= r;
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} else {
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ctx->obuf_len = 0;
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ctx->obuf_off = 0;
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break;
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}
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}
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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break;
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case BIO_CTRL_DUP:
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dbio = (BIO *)ptr;
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if (!BIO_set_read_buffer_size(dbio, ctx->ibuf_size) ||
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!BIO_set_write_buffer_size(dbio, ctx->obuf_size))
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ret = 0;
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break;
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case BIO_CTRL_PEEK:
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/* Ensure there's stuff in the input buffer */
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{
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char fake_buf[1];
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(void)buffer_read(b, fake_buf, 0);
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}
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if (num > ctx->ibuf_len)
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num = ctx->ibuf_len;
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memcpy(ptr, &(ctx->ibuf[ctx->ibuf_off]), num);
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ret = num;
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break;
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default:
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if (b->next_bio == NULL)
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return 0;
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
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break;
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}
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return ret;
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malloc_error:
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BIOerr(BIO_F_BUFFER_CTRL, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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static long buffer_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp)
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{
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long ret = 1;
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if (b->next_bio == NULL)
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return 0;
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switch (cmd) {
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default:
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ret = BIO_callback_ctrl(b->next_bio, cmd, fp);
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break;
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}
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return ret;
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}
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static int buffer_gets(BIO *b, char *buf, int size)
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{
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BIO_F_BUFFER_CTX *ctx;
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int num = 0, i, flag;
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char *p;
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ctx = (BIO_F_BUFFER_CTX *)b->ptr;
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size--; /* reserve space for a '\0' */
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BIO_clear_retry_flags(b);
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for (;;) {
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if (ctx->ibuf_len > 0) {
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p = &(ctx->ibuf[ctx->ibuf_off]);
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flag = 0;
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for (i = 0; (i < ctx->ibuf_len) && (i < size); i++) {
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*(buf++) = p[i];
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if (p[i] == '\n') {
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flag = 1;
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i++;
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break;
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}
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}
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num += i;
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size -= i;
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ctx->ibuf_len -= i;
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ctx->ibuf_off += i;
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if (flag || size == 0) {
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*buf = '\0';
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return num;
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}
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} else { /* read another chunk */
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i = BIO_read(b->next_bio, ctx->ibuf, ctx->ibuf_size);
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if (i <= 0) {
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BIO_copy_next_retry(b);
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*buf = '\0';
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if (i < 0)
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return ((num > 0) ? num : i);
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if (i == 0)
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return num;
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}
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ctx->ibuf_len = i;
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ctx->ibuf_off = 0;
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}
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}
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}
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static int buffer_puts(BIO *b, const char *str)
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{
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return buffer_write(b, str, strlen(str));
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}
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