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-rw-r--r--openssl/crypto/bio/bss_mem.c313
1 files changed, 313 insertions, 0 deletions
diff --git a/openssl/crypto/bio/bss_mem.c b/openssl/crypto/bio/bss_mem.c
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+++ b/openssl/crypto/bio/bss_mem.c
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+/* 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.
+ *
+ * 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.]
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include "cryptlib.h"
+#include <openssl/bio.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 mem_free(BIO *data);
+static BIO_METHOD mem_method = {
+ BIO_TYPE_MEM,
+ "memory buffer",
+ mem_write,
+ mem_read,
+ mem_puts,
+ mem_gets,
+ mem_ctrl,
+ mem_new,
+ mem_free,
+ NULL,
+};
+
+/*
+ * 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)
+{
+ return (&mem_method);
+}
+
+
+BIO *BIO_new_mem_buf(const void *buf, int len)
+{
+ BIO *ret;
+ BUF_MEM *b;
+ size_t sz;
+
+ if (!buf) {
+ 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())))
+ return NULL;
+ b = (BUF_MEM *)ret->ptr;
+ /* Cast away const and trust in the MEM_RDONLY flag. */
+ b->data = (void *)buf;
+ b->length = sz;
+ b->max = sz;
+ ret->flags |= BIO_FLAGS_MEM_RDONLY;
+ /* Since this is static data retrying wont help */
+ ret->num = 0;
+ return ret;
+}
+
+static int mem_new(BIO *bi)
+{
+ BUF_MEM *b;
+
+ if ((b = BUF_MEM_new()) == NULL)
+ return (0);
+ bi->shutdown = 1;
+ bi->init = 1;
+ bi->num = -1;
+ bi->ptr = (char *)b;
+ return (1);
+}
+
+static int mem_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 (1);
+}
+
+static int mem_read(BIO *b, char *out, int outl)
+{
+ int ret = -1;
+ BUF_MEM *bm;
+
+ bm = (BUF_MEM *)b->ptr;
+ 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);
+ }
+ } 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;
+ BUF_MEM *bm;
+
+ bm = (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);
+ blen = bm->length;
+ if (BUF_MEM_grow_clean(bm, blen + inl) != (blen + inl))
+ goto end;
+ memcpy(&(bm->data[blen]), in, inl);
+ ret = inl;
+ end:
+ return (ret);
+}
+
+static long mem_ctrl(BIO *b, int cmd, long num, void *ptr)
+{
+ long ret = 1;
+ char **pptr;
+
+ BUF_MEM *bm = (BUF_MEM *)b->ptr;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ 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;
+ } else {
+ memset(bm->data, 0, bm->max);
+ bm->length = 0;
+ }
+ }
+ break;
+ case BIO_CTRL_EOF:
+ ret = (long)(bm->length == 0);
+ break;
+ case BIO_C_SET_BUF_MEM_EOF_RETURN:
+ b->num = (int)num;
+ 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(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 ((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);
+}
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