-/* crypto/bio/bss_mem.c */
-/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
- *
- * This package is an SSL implementation written
- * by Eric Young (eay@cryptsoft.com).
- * The implementation was written so as to conform with Netscapes SSL.
- *
- * This library is free for commercial and non-commercial use as long as
- * the following conditions are aheared to. The following conditions
- * apply to all code found in this distribution, be it the RC4, RSA,
- * lhash, DES, etc., code; not just the SSL code. The SSL documentation
- * included with this distribution is covered by the same copyright terms
- * except that the holder is Tim Hudson (tjh@cryptsoft.com).
- *
- * Copyright remains Eric Young's, and as such any Copyright notices in
- * the code are not to be removed.
- * If this package is used in a product, Eric Young should be given attribution
- * as the author of the parts of the library used.
- * This can be in the form of a textual message at program startup or
- * in documentation (online or textual) provided with the package.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * "This product includes cryptographic software written by
- * Eric Young (eay@cryptsoft.com)"
- * The word 'cryptographic' can be left out if the rouines from the library
- * being used are not cryptographic related :-).
- * 4. If you include any Windows specific code (or a derivative thereof) from
- * the apps directory (application code) you must include an acknowledgement:
- * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
- *
- * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
+/*
+ * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
*
- * The licence and distribution terms for any publically available version or
- * derivative of this code cannot be changed. i.e. this code cannot simply be
- * copied and put under another distribution licence
- * [including the GNU Public Licence.]
+ * Licensed under the Apache License 2.0 (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <errno.h>
-#include "cryptlib.h"
-#include <openssl/bio.h>
+#include "bio_local.h"
+#include "internal/cryptlib.h"
static int mem_write(BIO *h, const char *buf, int num);
static int mem_read(BIO *h, char *buf, int size);
static int mem_gets(BIO *h, char *str, int size);
static long mem_ctrl(BIO *h, int cmd, long arg1, void *arg2);
static int mem_new(BIO *h);
+static int secmem_new(BIO *h);
static int mem_free(BIO *data);
-static BIO_METHOD mem_method = {
+static int mem_buf_free(BIO *data);
+static int mem_buf_sync(BIO *h);
+
+static const BIO_METHOD mem_method = {
BIO_TYPE_MEM,
"memory buffer",
+ bwrite_conv,
mem_write,
+ bread_conv,
mem_read,
mem_puts,
mem_gets,
mem_ctrl,
mem_new,
mem_free,
- NULL,
+ NULL, /* mem_callback_ctrl */
};
+static const BIO_METHOD secmem_method = {
+ BIO_TYPE_MEM,
+ "secure memory buffer",
+ bwrite_conv,
+ mem_write,
+ bread_conv,
+ mem_read,
+ mem_puts,
+ mem_gets,
+ mem_ctrl,
+ secmem_new,
+ mem_free,
+ NULL, /* mem_callback_ctrl */
+};
+
+/*
+ * BIO memory stores buffer and read pointer
+ * however the roles are different for read only BIOs.
+ * In that case the readp just stores the original state
+ * to be used for reset.
+ */
+typedef struct bio_buf_mem_st {
+ struct buf_mem_st *buf; /* allocated buffer */
+ struct buf_mem_st *readp; /* read pointer */
+} BIO_BUF_MEM;
+
/*
* bio->num is used to hold the value to return on 'empty', if it is 0,
* should_retry is not set
*/
-BIO_METHOD *BIO_s_mem(void)
+const BIO_METHOD *BIO_s_mem(void)
{
- return (&mem_method);
+ return &mem_method;
}
-BIO *BIO_new_mem_buf(void *buf, int len)
+const BIO_METHOD *BIO_s_secmem(void)
+{
+ return(&secmem_method);
+}
+
+BIO *BIO_new_mem_buf(const void *buf, int len)
{
BIO *ret;
BUF_MEM *b;
+ BIO_BUF_MEM *bb;
size_t sz;
- if (!buf) {
- BIOerr(BIO_F_BIO_NEW_MEM_BUF, BIO_R_NULL_PARAMETER);
+ if (buf == NULL) {
+ ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
return NULL;
}
sz = (len < 0) ? strlen(buf) : (size_t)len;
- if (!(ret = BIO_new(BIO_s_mem())))
+ if ((ret = BIO_new(BIO_s_mem())) == NULL)
return NULL;
- b = (BUF_MEM *)ret->ptr;
- b->data = buf;
+ bb = (BIO_BUF_MEM *)ret->ptr;
+ b = bb->buf;
+ /* Cast away const and trust in the MEM_RDONLY flag. */
+ b->data = (void *)buf;
b->length = sz;
b->max = sz;
+ *bb->readp = *bb->buf;
ret->flags |= BIO_FLAGS_MEM_RDONLY;
- /* Since this is static data retrying wont help */
+ /* Since this is static data retrying won't help */
ret->num = 0;
return ret;
}
-static int mem_new(BIO *bi)
+static int mem_init(BIO *bi, unsigned long flags)
{
- BUF_MEM *b;
+ BIO_BUF_MEM *bb = OPENSSL_zalloc(sizeof(*bb));
- if ((b = BUF_MEM_new()) == NULL)
- return (0);
+ if (bb == NULL)
+ return 0;
+ if ((bb->buf = BUF_MEM_new_ex(flags)) == NULL) {
+ OPENSSL_free(bb);
+ return 0;
+ }
+ if ((bb->readp = OPENSSL_zalloc(sizeof(*bb->readp))) == NULL) {
+ BUF_MEM_free(bb->buf);
+ OPENSSL_free(bb);
+ return 0;
+ }
+ *bb->readp = *bb->buf;
bi->shutdown = 1;
bi->init = 1;
bi->num = -1;
- bi->ptr = (char *)b;
- return (1);
+ bi->ptr = (char *)bb;
+ return 1;
+}
+
+static int mem_new(BIO *bi)
+{
+ return mem_init(bi, 0L);
+}
+
+static int secmem_new(BIO *bi)
+{
+ return mem_init(bi, BUF_MEM_FLAG_SECURE);
}
static int mem_free(BIO *a)
+{
+ BIO_BUF_MEM *bb;
+
+ if (a == NULL)
+ return 0;
+
+ bb = (BIO_BUF_MEM *)a->ptr;
+ if (!mem_buf_free(a))
+ return 0;
+ OPENSSL_free(bb->readp);
+ OPENSSL_free(bb);
+ return 1;
+}
+
+static int mem_buf_free(BIO *a)
{
if (a == NULL)
- return (0);
- if (a->shutdown) {
- if ((a->init) && (a->ptr != NULL)) {
- BUF_MEM *b;
- b = (BUF_MEM *)a->ptr;
- if (a->flags & BIO_FLAGS_MEM_RDONLY)
- b->data = NULL;
- BUF_MEM_free(b);
- a->ptr = NULL;
+ return 0;
+
+ if (a->shutdown && a->init && a->ptr != NULL) {
+ BIO_BUF_MEM *bb = (BIO_BUF_MEM *)a->ptr;
+ BUF_MEM *b = bb->buf;
+
+ if (a->flags & BIO_FLAGS_MEM_RDONLY)
+ b->data = NULL;
+ BUF_MEM_free(b);
+ }
+ return 1;
+}
+
+/*
+ * Reallocate memory buffer if read pointer differs
+ * NOT FOR RDONLY
+ */
+static int mem_buf_sync(BIO *b)
+{
+ if (b != NULL && b->init != 0 && b->ptr != NULL) {
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+
+ if (bbm->readp->data != bbm->buf->data) {
+ memmove(bbm->buf->data, bbm->readp->data, bbm->readp->length);
+ bbm->buf->length = bbm->readp->length;
+ bbm->readp->data = bbm->buf->data;
}
}
- return (1);
+ return 0;
}
static int mem_read(BIO *b, char *out, int outl)
{
int ret = -1;
- BUF_MEM *bm;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+ BUF_MEM *bm = bbm->readp;
- bm = (BUF_MEM *)b->ptr;
+ if (b->flags & BIO_FLAGS_MEM_RDONLY)
+ bm = bbm->buf;
BIO_clear_retry_flags(b);
ret = (outl >= 0 && (size_t)outl > bm->length) ? (int)bm->length : outl;
if ((out != NULL) && (ret > 0)) {
memcpy(out, bm->data, ret);
bm->length -= ret;
- if (b->flags & BIO_FLAGS_MEM_RDONLY)
- bm->data += ret;
- else {
- memmove(&(bm->data[0]), &(bm->data[ret]), bm->length);
- }
+ bm->max -= ret;
+ bm->data += ret;
} else if (bm->length == 0) {
ret = b->num;
if (ret != 0)
BIO_set_retry_read(b);
}
- return (ret);
+ return ret;
}
static int mem_write(BIO *b, const char *in, int inl)
{
int ret = -1;
int blen;
- BUF_MEM *bm;
-
- bm = (BUF_MEM *)b->ptr;
- if (in == NULL) {
- BIOerr(BIO_F_MEM_WRITE, BIO_R_NULL_PARAMETER);
- goto end;
- }
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
if (b->flags & BIO_FLAGS_MEM_RDONLY) {
- BIOerr(BIO_F_MEM_WRITE, BIO_R_WRITE_TO_READ_ONLY_BIO);
+ ERR_raise(ERR_LIB_BIO, BIO_R_WRITE_TO_READ_ONLY_BIO);
goto end;
}
-
BIO_clear_retry_flags(b);
- blen = bm->length;
- if (BUF_MEM_grow_clean(bm, blen + inl) == 0)
+ if (inl == 0)
+ return 0;
+ if (in == NULL) {
+ ERR_raise(ERR_LIB_BIO, ERR_R_PASSED_NULL_PARAMETER);
+ goto end;
+ }
+ blen = bbm->readp->length;
+ mem_buf_sync(b);
+ if (BUF_MEM_grow_clean(bbm->buf, blen + inl) == 0)
goto end;
- memcpy(&(bm->data[blen]), in, inl);
+ memcpy(bbm->buf->data + blen, in, inl);
+ *bbm->readp = *bbm->buf;
ret = inl;
end:
- return (ret);
+ return ret;
}
static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
{
long ret = 1;
char **pptr;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+ BUF_MEM *bm, *bo; /* bio_mem, bio_other */
+ long off, remain;
- BUF_MEM *bm = (BUF_MEM *)b->ptr;
+ if (b->flags & BIO_FLAGS_MEM_RDONLY) {
+ bm = bbm->buf;
+ bo = bbm->readp;
+ } else {
+ bm = bbm->readp;
+ bo = bbm->buf;
+ }
+ off = (bm->data == bo->data) ? 0 : bm->data - bo->data;
+ remain = bm->length;
switch (cmd) {
case BIO_CTRL_RESET:
+ bm = bbm->buf;
if (bm->data != NULL) {
- /* For read only case reset to the start again */
- if (b->flags & BIO_FLAGS_MEM_RDONLY) {
- bm->data -= bm->max - bm->length;
- bm->length = bm->max;
+ if (!(b->flags & BIO_FLAGS_MEM_RDONLY)) {
+ if (!(b->flags & BIO_FLAGS_NONCLEAR_RST)) {
+ memset(bm->data, 0, bm->max);
+ bm->length = 0;
+ }
+ *bbm->readp = *bbm->buf;
} else {
- memset(bm->data, 0, bm->max);
- bm->length = 0;
+ /* For read only case just reset to the start again */
+ *bbm->buf = *bbm->readp;
}
}
break;
+ case BIO_C_FILE_SEEK:
+ if (num < 0 || num > off + remain)
+ return -1; /* Can't see outside of the current buffer */
+
+ bm->data = (num != 0) ? bo->data + num : bo->data;
+ bm->length = bo->length - num;
+ bm->max = bo->max - num;
+ off = num;
+ /* FALLTHRU */
+ case BIO_C_FILE_TELL:
+ ret = off;
+ break;
case BIO_CTRL_EOF:
ret = (long)(bm->length == 0);
break;
ret = (long)bm->length;
if (ptr != NULL) {
pptr = (char **)ptr;
- *pptr = (char *)&(bm->data[0]);
+ *pptr = (char *)(bm->data);
}
break;
case BIO_C_SET_BUF_MEM:
- mem_free(b);
+ mem_buf_free(b);
b->shutdown = (int)num;
- b->ptr = ptr;
+ bbm->buf = ptr;
+ *bbm->readp = *bbm->buf;
break;
case BIO_C_GET_BUF_MEM_PTR:
if (ptr != NULL) {
+ if (!(b->flags & BIO_FLAGS_MEM_RDONLY))
+ mem_buf_sync(b);
+ bm = bbm->buf;
pptr = (char **)ptr;
*pptr = (char *)bm;
}
case BIO_CTRL_SET_CLOSE:
b->shutdown = (int)num;
break;
-
case BIO_CTRL_WPENDING:
ret = 0L;
break;
ret = 0;
break;
}
- return (ret);
+ return ret;
}
static int mem_gets(BIO *bp, char *buf, int size)
int i, j;
int ret = -1;
char *p;
- BUF_MEM *bm = (BUF_MEM *)bp->ptr;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)bp->ptr;
+ BUF_MEM *bm = bbm->readp;
+ if (bp->flags & BIO_FLAGS_MEM_RDONLY)
+ bm = bbm->buf;
BIO_clear_retry_flags(bp);
j = bm->length;
if ((size - 1) < j)
if (i > 0)
buf[i] = '\0';
ret = i;
- return (ret);
+ return ret;
}
static int mem_puts(BIO *bp, const char *str)
n = strlen(str);
ret = mem_write(bp, str, n);
/* memory semantics is that it will always work */
- return (ret);
+ return ret;
}
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