-/* crypto/bio/bss_mem.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
- * All rights reserved.
+/*
+ * Copyright 1995-2018 The OpenSSL Project Authors. 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.
- *
- * 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 "bio.h"
-
-#ifndef NOPROTO
-static int mem_write(BIO *h,char *buf,int num);
-static int mem_read(BIO *h,char *buf,int size);
-static int mem_puts(BIO *h,char *str);
-static int mem_gets(BIO *h,char *str,int size);
-static long mem_ctrl(BIO *h,int cmd,long arg1,char *arg2);
+#include "bio_lcl.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_puts(BIO *h, const char *str);
+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);
-#else
-static int mem_write();
-static int mem_read();
-static int mem_puts();
-static int mem_gets();
-static long mem_ctrl();
-static int mem_new();
-static int mem_free();
-#endif
-
-static BIO_METHOD mem_method=
- {
- BIO_TYPE_MEM,"memory buffer",
- mem_write,
- mem_read,
- mem_puts,
- mem_gets,
- mem_ctrl,
- mem_new,
- mem_free,
- };
-
-BIO_METHOD *BIO_s_mem()
- {
- return(&mem_method);
- }
-
-static int mem_new(bi)
-BIO *bi;
- {
- BUF_MEM *b;
-
- if ((b=BUF_MEM_new()) == NULL)
- return(0);
- bi->shutdown=1;
- bi->init=1;
- bi->num=0;
- bi->ptr=(char *)b;
- return(1);
- }
-
-static int mem_free(a)
-BIO *a;
- {
- if (a == NULL) return(0);
- if (a->shutdown)
- {
- if ((a->init) && (a->ptr != NULL))
- {
- BUF_MEM_free((BUF_MEM *)a->ptr);
- a->ptr=NULL;
- }
- }
- return(1);
- }
-
-static int mem_read(b,out,outl)
-BIO *b;
-char *out;
-int outl;
- {
- int ret= -1;
- BUF_MEM *bm;
- int i;
- char *from,*to;
-
- bm=(BUF_MEM *)b->ptr;
- BIO_clear_retry_flags(b);
- ret=(outl > bm->length)?bm->length:outl;
- if ((out != NULL) && (ret > 0))
- {
- memcpy(out,bm->data,ret);
- bm->length-=ret;
- /* memmove(&(bm->data[0]),&(bm->data[ret]), bm->length); */
- from=(char *)&(bm->data[ret]);
- to=(char *)&(bm->data[0]);
- for (i=0; i<bm->length; i++)
- to[i]=from[i];
- }
- else if (bm->length == 0)
- {
- BIO_set_retry_read(b);
- ret= -1;
- }
- return(ret);
- }
-
-static int mem_write(b,in,inl)
-BIO *b;
-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_clear_retry_flags(b);
- blen=bm->length;
- if (BUF_MEM_grow(bm,blen+inl) != (blen+inl))
- goto end;
- memcpy(&(bm->data[blen]),in,inl);
- ret=inl;
-end:
- return(ret);
- }
-
-static long mem_ctrl(b,cmd,num,ptr)
-BIO *b;
-int cmd;
-long num;
-char *ptr;
- {
- long ret=1;
- char **pptr;
-
- BUF_MEM *bm=(BUF_MEM *)b->ptr;
-
- switch (cmd)
- {
- case BIO_CTRL_RESET:
- if (bm->data != NULL)
- memset(bm->data,0,bm->max);
- bm->length=0;
- break;
- case BIO_CTRL_EOF:
- ret=(long)(bm->length == 0);
- break;
- case BIO_CTRL_INFO:
- ret=(long)bm->length;
- if (ptr != NULL)
- {
- pptr=(char **)ptr;
- *pptr=(char *)&(bm->data[0]);
- }
- break;
- case BIO_C_SET_BUF_MEM:
- mem_free(b);
- b->shutdown=(int)num;
- b->ptr=ptr;
- break;
- case BIO_C_GET_BUF_MEM_PTR:
- if (ptr != NULL)
- {
- pptr=(char **)ptr;
- *pptr=(char *)bm;
- }
- break;
- case BIO_CTRL_GET_CLOSE:
- ret=(long)b->shutdown;
- break;
- case BIO_CTRL_SET_CLOSE:
- b->shutdown=(int)num;
- break;
-
- case BIO_CTRL_WPENDING:
- ret=0L;
- break;
- case BIO_CTRL_PENDING:
- ret=(long)bm->length;
- break;
- case BIO_CTRL_DUP:
- case BIO_CTRL_FLUSH:
- ret=1;
- break;
- case BIO_CTRL_PUSH:
- case BIO_CTRL_POP:
- default:
- ret=0;
- break;
- }
- return(ret);
- }
-
-static int mem_gets(bp,buf,size)
-BIO *bp;
-char *buf;
-int size;
- {
- int i,j;
- int ret= -1;
- char *p;
- BUF_MEM *bm=(BUF_MEM *)bp->ptr;
-
- BIO_clear_retry_flags(bp);
- j=bm->length;
- if (j <= 0) return(0);
- p=bm->data;
- for (i=0; i<j; i++)
- {
- if (p[i] == '\n') break;
- }
- if (i == j)
- {
- BIO_set_retry_read(bp);
- /* return(-1); change the semantics 0.6.6a */
- }
- else
- i++;
- /* i is the max to copy */
- if ((size-1) < i) i=size-1;
- i=mem_read(bp,buf,i);
- if (i > 0) buf[i]='\0';
- ret=i;
- return(ret);
- }
-
-static int mem_puts(bp,str)
-BIO *bp;
-char *str;
- {
- int n,ret;
-
- n=strlen(str);
- ret=mem_write(bp,str,n);
- /* memory semantics is that it will always work */
- return(ret);
- }
+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",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
+ mem_write,
+ /* TODO: Convert to new style read function */
+ bread_conv,
+ mem_read,
+ mem_puts,
+ mem_gets,
+ mem_ctrl,
+ mem_new,
+ mem_free,
+ NULL, /* mem_callback_ctrl */
+};
+
+static const BIO_METHOD secmem_method = {
+ BIO_TYPE_MEM,
+ "secure memory buffer",
+ /* TODO: Convert to new style write function */
+ bwrite_conv,
+ mem_write,
+ /* TODO: Convert to new style read function */
+ 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 */
+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
+ */
+
+const BIO_METHOD *BIO_s_mem(void)
+{
+ return &mem_method;
+}
+
+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 == NULL) {
+ BIOerr(BIO_F_BIO_NEW_MEM_BUF, BIO_R_NULL_PARAMETER);
+ return NULL;
+ }
+ sz = (len < 0) ? strlen(buf) : (size_t)len;
+ if ((ret = BIO_new(BIO_s_mem())) == NULL)
+ return NULL;
+ 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 won't help */
+ ret->num = 0;
+ return ret;
+}
+
+static int mem_init(BIO *bi, unsigned long flags)
+{
+ BIO_BUF_MEM *bb = OPENSSL_zalloc(sizeof(*bb));
+
+ 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 *)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 && 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
+ */
+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 0;
+}
+
+static int mem_read(BIO *b, char *out, int outl)
+{
+ int ret = -1;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+ BUF_MEM *bm = bbm->readp;
+
+ 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;
+ bm->data += ret;
+ } else if (bm->length == 0) {
+ ret = b->num;
+ if (ret != 0)
+ BIO_set_retry_read(b);
+ }
+ return ret;
+}
+
+static int mem_write(BIO *b, const char *in, int inl)
+{
+ int ret = -1;
+ int blen;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)b->ptr;
+
+ if (in == NULL) {
+ BIOerr(BIO_F_MEM_WRITE, BIO_R_NULL_PARAMETER);
+ goto end;
+ }
+ if (b->flags & BIO_FLAGS_MEM_RDONLY) {
+ BIOerr(BIO_F_MEM_WRITE, BIO_R_WRITE_TO_READ_ONLY_BIO);
+ goto end;
+ }
+ BIO_clear_retry_flags(b);
+ if (inl == 0)
+ return 0;
+ blen = bbm->readp->length;
+ mem_buf_sync(b);
+ if (BUF_MEM_grow_clean(bbm->buf, blen + inl) == 0)
+ goto end;
+ memcpy(bbm->buf->data + blen, in, inl);
+ *bbm->readp = *bbm->buf;
+ ret = inl;
+ end:
+ 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;
+
+ 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) || (b->flags & BIO_FLAGS_NONCLEAR_RST)) {
+ bm->length = bm->max;
+ } else {
+ memset(bm->data, 0, bm->max);
+ bm->length = 0;
+ }
+ *bbm->readp = *bbm->buf;
+ }
+ break;
+ case BIO_CTRL_EOF:
+ bm = bbm->readp;
+ ret = (long)(bm->length == 0);
+ break;
+ case BIO_C_SET_BUF_MEM_EOF_RETURN:
+ b->num = (int)num;
+ break;
+ case BIO_CTRL_INFO:
+ bm = bbm->readp;
+ ret = (long)bm->length;
+ if (ptr != NULL) {
+ pptr = (char **)ptr;
+ *pptr = (char *)&(bm->data[0]);
+ }
+ break;
+ case BIO_C_SET_BUF_MEM:
+ mem_buf_free(b);
+ b->shutdown = (int)num;
+ bbm->buf = ptr;
+ *bbm->readp = *bbm->buf;
+ break;
+ case BIO_C_GET_BUF_MEM_PTR:
+ if (ptr != NULL) {
+ mem_buf_sync(b);
+ bm = bbm->readp;
+ pptr = (char **)ptr;
+ *pptr = (char *)bm;
+ }
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = (long)b->shutdown;
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ b->shutdown = (int)num;
+ break;
+ case BIO_CTRL_WPENDING:
+ ret = 0L;
+ break;
+ case BIO_CTRL_PENDING:
+ bm = bbm->readp;
+ ret = (long)bm->length;
+ break;
+ case BIO_CTRL_DUP:
+ case BIO_CTRL_FLUSH:
+ ret = 1;
+ break;
+ case BIO_CTRL_PUSH:
+ case BIO_CTRL_POP:
+ default:
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static int mem_gets(BIO *bp, char *buf, int size)
+{
+ int i, j;
+ int ret = -1;
+ char *p;
+ BIO_BUF_MEM *bbm = (BIO_BUF_MEM *)bp->ptr;
+ BUF_MEM *bm = bbm->readp;
+
+ BIO_clear_retry_flags(bp);
+ j = bm->length;
+ if ((size - 1) < j)
+ j = size - 1;
+ if (j <= 0) {
+ *buf = '\0';
+ return 0;
+ }
+ p = bm->data;
+ for (i = 0; i < j; i++) {
+ if (p[i] == '\n') {
+ i++;
+ break;
+ }
+ }
+
+ /*
+ * i is now the max num of bytes to copy, either j or up to
+ * and including the first newline
+ */
+
+ i = mem_read(bp, buf, i);
+ if (i > 0)
+ buf[i] = '\0';
+ ret = i;
+ return ret;
+}
+
+static int mem_puts(BIO *bp, const char *str)
+{
+ int n, ret;
+ n = strlen(str);
+ ret = mem_write(bp, str, n);
+ /* memory semantics is that it will always work */
+ return ret;
+}
projects / openssl.git / blobdiff