diff options
Diffstat (limited to 'Cryptlib/OpenSSL/crypto/bio/bss_mem.c')
| -rw-r--r-- | Cryptlib/OpenSSL/crypto/bio/bss_mem.c | 224 |
1 files changed, 95 insertions, 129 deletions
diff --git a/Cryptlib/OpenSSL/crypto/bio/bss_mem.c b/Cryptlib/OpenSSL/crypto/bio/bss_mem.c index 6dc075dc..b0394a96 100644 --- a/Cryptlib/OpenSSL/crypto/bio/bss_mem.c +++ b/Cryptlib/OpenSSL/crypto/bio/bss_mem.c @@ -1,16 +1,65 @@ -/* - * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. +/* 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. * - * Licensed under the OpenSSL license (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 + * 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 "bio_lcl.h" -#include "internal/cryptlib.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); @@ -18,12 +67,8 @@ 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); -static int mem_buf_free(BIO *data, int free_all); -static int mem_buf_sync(BIO *h); - -static const BIO_METHOD mem_method = { +static BIO_METHOD mem_method = { BIO_TYPE_MEM, "memory buffer", mem_write, @@ -36,159 +81,87 @@ static const BIO_METHOD mem_method = { NULL, }; -static const BIO_METHOD secmem_method = { - BIO_TYPE_MEM, - "secure memory buffer", - mem_write, - mem_read, - mem_puts, - mem_gets, - mem_ctrl, - secmem_new, - mem_free, - NULL, -}; - -/* 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) +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) { + 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())) == NULL) + if (!(ret = BIO_new(BIO_s_mem()))) return NULL; - bb = (BIO_BUF_MEM *)ret->ptr; - b = bb->buf; + 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; - *bb->readp = *bb->buf; ret->flags |= BIO_FLAGS_MEM_RDONLY; - /* Since this is static data retrying won't help */ + /* Since this is static data retrying wont help */ ret->num = 0; return ret; } -static int mem_init(BIO *bi, unsigned long flags) +static int mem_new(BIO *bi) { - BIO_BUF_MEM *bb = OPENSSL_zalloc(sizeof(*bb)); + BUF_MEM *b; - 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; + if ((b = BUF_MEM_new()) == NULL) + return (0); 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)); + bi->ptr = (char *)b; + return (1); } static int mem_free(BIO *a) { - return (mem_buf_free(a, 1)); -} - -static int mem_buf_free(BIO *a, int free_all) -{ if (a == NULL) return (0); if (a->shutdown) { if ((a->init) && (a->ptr != NULL)) { BUF_MEM *b; - BIO_BUF_MEM *bb = (BIO_BUF_MEM *)a->ptr; - - if (bb != NULL) { - b = bb->buf; - if (a->flags & BIO_FLAGS_MEM_RDONLY) - b->data = NULL; - BUF_MEM_free(b); - if (free_all) { - OPENSSL_free(bb->readp); - OPENSSL_free(bb); - } - } + b = (BUF_MEM *)a->ptr; + if (a->flags & BIO_FLAGS_MEM_RDONLY) + b->data = NULL; + BUF_MEM_free(b); a->ptr = NULL; } } 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; + 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; - bm->data += 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) @@ -201,23 +174,24 @@ 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; + 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 = bbm->readp->length; - mem_buf_sync(b); - if (BUF_MEM_grow_clean(bbm->buf, blen + inl) == 0) + blen = bm->length; + if (BUF_MEM_grow_clean(bm, blen + inl) != (blen + inl)) goto end; - memcpy(bbm->buf->data + blen, in, inl); - *bbm->readp = *bbm->buf; + memcpy(&(bm->data[blen]), in, inl); ret = inl; end: return (ret); @@ -227,32 +201,29 @@ 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; + + BUF_MEM *bm = (BUF_MEM *)b->ptr; 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)) { + 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; } - *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; @@ -260,16 +231,12 @@ static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) } break; case BIO_C_SET_BUF_MEM: - mem_buf_free(b, 0); + mem_free(b); b->shutdown = (int)num; - bbm->buf = ptr; - *bbm->readp = *bbm->buf; - b->ptr = bbm; + b->ptr = ptr; break; case BIO_C_GET_BUF_MEM_PTR: if (ptr != NULL) { - mem_buf_sync(b); - bm = bbm->readp; pptr = (char **)ptr; *pptr = (char *)bm; } @@ -280,11 +247,11 @@ static long mem_ctrl(BIO *b, int cmd, long num, void *ptr) 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: @@ -305,8 +272,7 @@ 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; + BUF_MEM *bm = (BUF_MEM *)bp->ptr; BIO_clear_retry_flags(bp); j = bm->length; |