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-rw-r--r--src/crypto/bio/bio_mem.c327
1 files changed, 327 insertions, 0 deletions
diff --git a/src/crypto/bio/bio_mem.c b/src/crypto/bio/bio_mem.c
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+++ b/src/crypto/bio/bio_mem.c
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+/* 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 <openssl/bio.h>
+
+#include <limits.h>
+#include <string.h>
+
+#include <openssl/buf.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+
+
+BIO *BIO_new_mem_buf(void *buf, int len) {
+ BIO *ret;
+ BUF_MEM *b;
+ const size_t size = len < 0 ? strlen((char *)buf) : (size_t)len;
+
+ if (!buf && len != 0) {
+ OPENSSL_PUT_ERROR(BIO, BIO_new_mem_buf, BIO_R_NULL_PARAMETER);
+ return NULL;
+ }
+
+ ret = BIO_new(BIO_s_mem());
+ if (ret == NULL) {
+ return NULL;
+ }
+
+ b = (BUF_MEM *)ret->ptr;
+ b->data = buf;
+ b->length = size;
+ b->max = size;
+
+ ret->flags |= BIO_FLAGS_MEM_RDONLY;
+
+ /* |num| is used to store the value that this BIO will return when it runs
+ * out of data. If it's negative then the retry flags will also be set. Since
+ * this is static data, retrying wont help */
+ ret->num = 0;
+
+ return ret;
+}
+
+static int mem_new(BIO *bio) {
+ BUF_MEM *b;
+
+ b = BUF_MEM_new();
+ if (b == NULL) {
+ return 0;
+ }
+
+ /* |shutdown| is used to store the close flag: whether the BIO has ownership
+ * of the BUF_MEM. */
+ bio->shutdown = 1;
+ bio->init = 1;
+ bio->num = -1;
+ bio->ptr = (char *)b;
+
+ return 1;
+}
+
+static int mem_free(BIO *bio) {
+ BUF_MEM *b;
+
+ if (bio == NULL) {
+ return 0;
+ }
+
+ if (!bio->shutdown || !bio->init || bio->ptr == NULL) {
+ return 1;
+ }
+
+ b = (BUF_MEM *)bio->ptr;
+ if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
+ b->data = NULL;
+ }
+ BUF_MEM_free(b);
+ bio->ptr = NULL;
+ return 1;
+}
+
+static int mem_read(BIO *bio, char *out, int outl) {
+ int ret;
+ BUF_MEM *b = (BUF_MEM*) bio->ptr;
+
+ BIO_clear_retry_flags(bio);
+ ret = outl;
+ if (b->length < INT_MAX && ret > (int)b->length) {
+ ret = b->length;
+ }
+
+ if (ret > 0) {
+ memcpy(out, b->data, ret);
+ b->length -= ret;
+ if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
+ b->data += ret;
+ } else {
+ memmove(b->data, &b->data[ret], b->length);
+ }
+ } else if (b->length == 0) {
+ ret = bio->num;
+ if (ret != 0) {
+ BIO_set_retry_read(bio);
+ }
+ }
+ return ret;
+}
+
+static int mem_write(BIO *bio, const char *in, int inl) {
+ int ret = -1;
+ int blen;
+ BUF_MEM *b;
+
+ b = (BUF_MEM *)bio->ptr;
+
+ if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
+ OPENSSL_PUT_ERROR(BIO, mem_write, BIO_R_WRITE_TO_READ_ONLY_BIO);
+ goto err;
+ }
+
+ BIO_clear_retry_flags(bio);
+ blen = b->length;
+ if (INT_MAX - blen < inl) {
+ goto err;
+ }
+ if (BUF_MEM_grow_clean(b, blen + inl) != (blen + inl)) {
+ goto err;
+ }
+ memcpy(&b->data[blen], in, inl);
+ ret = inl;
+
+err:
+ return ret;
+}
+
+static int mem_puts(BIO *bp, const char *str) {
+ return mem_write(bp, str, strlen(str));
+}
+
+static int mem_gets(BIO *bio, char *buf, int size) {
+ int i, j;
+ char *p;
+ BUF_MEM *b = (BUF_MEM *)bio->ptr;
+
+ BIO_clear_retry_flags(bio);
+ j = b->length;
+ if (size - 1 < j) {
+ j = size - 1;
+ }
+ if (j <= 0) {
+ if (size > 0) {
+ *buf = 0;
+ }
+ return 0;
+ }
+
+ p = b->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(bio, buf, i);
+ if (i > 0) {
+ buf[i] = '\0';
+ }
+ return i;
+}
+
+static long mem_ctrl(BIO *bio, int cmd, long num, void *ptr) {
+ long ret = 1;
+ char **pptr;
+
+ BUF_MEM *b = (BUF_MEM *)bio->ptr;
+
+ switch (cmd) {
+ case BIO_CTRL_RESET:
+ if (b->data != NULL) {
+ /* For read only case reset to the start again */
+ if (bio->flags & BIO_FLAGS_MEM_RDONLY) {
+ b->data -= b->max - b->length;
+ b->length = b->max;
+ } else {
+ memset(b->data, 0, b->max);
+ b->length = 0;
+ }
+ }
+ break;
+ case BIO_CTRL_EOF:
+ ret = (long)(b->length == 0);
+ break;
+ case BIO_C_SET_BUF_MEM_EOF_RETURN:
+ bio->num = (int)num;
+ break;
+ case BIO_CTRL_INFO:
+ ret = (long)b->length;
+ if (ptr != NULL) {
+ pptr = (char **)ptr;
+ *pptr = (char *)&b->data[0];
+ }
+ break;
+ case BIO_C_SET_BUF_MEM:
+ mem_free(bio);
+ bio->shutdown = (int)num;
+ bio->ptr = ptr;
+ break;
+ case BIO_C_GET_BUF_MEM_PTR:
+ if (ptr != NULL) {
+ pptr = (char **)ptr;
+ *pptr = (char *)b;
+ }
+ break;
+ case BIO_CTRL_GET_CLOSE:
+ ret = (long)bio->shutdown;
+ break;
+ case BIO_CTRL_SET_CLOSE:
+ bio->shutdown = (int)num;
+ break;
+
+ case BIO_CTRL_WPENDING:
+ ret = 0L;
+ break;
+ case BIO_CTRL_PENDING:
+ ret = (long)b->length;
+ break;
+ case BIO_CTRL_FLUSH:
+ ret = 1;
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ return ret;
+}
+
+static const BIO_METHOD mem_method = {
+ BIO_TYPE_MEM, "memory buffer", mem_write, mem_read, mem_puts,
+ mem_gets, mem_ctrl, mem_new, mem_free, NULL, };
+
+const BIO_METHOD *BIO_s_mem(void) { return &mem_method; }
+
+int BIO_mem_contents(const BIO *bio, const uint8_t **out_contents,
+ size_t *out_len) {
+ const BUF_MEM *b;
+ if (bio->method != &mem_method) {
+ return 0;
+ }
+
+ b = (BUF_MEM *)bio->ptr;
+ *out_contents = (uint8_t *)b->data;
+ *out_len = b->length;
+ return 1;
+}
+
+long BIO_get_mem_data(BIO *bio, char **contents) {
+ return BIO_ctrl(bio, BIO_CTRL_INFO, 0, (char *) contents);
+}
+
+int BIO_get_mem_ptr(BIO *bio, BUF_MEM **out) {
+ return BIO_ctrl(bio, BIO_C_GET_BUF_MEM_PTR, 0, (char *) out);
+}
+
+int BIO_set_mem_buf(BIO *bio, BUF_MEM *b, int take_ownership) {
+ return BIO_ctrl(bio, BIO_C_SET_BUF_MEM, take_ownership, (char *) b);
+}
+
+int BIO_set_mem_eof_return(BIO *bio, int eof_value) {
+ return BIO_ctrl(bio, BIO_C_SET_BUF_MEM_EOF_RETURN, eof_value, NULL);
+}
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