evp_enc.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/* 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
* 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 "cryptlib.h"
#ifndef OPENSSL_NO_ENGINE
#endif
#include "evp_locl.h"
{
/* ctx->cipher=NULL; */
}
{
if (cipher)
}
{
if (enc == -1)
else
{
if (enc)
enc = 1;
}
#ifndef OPENSSL_NO_ENGINE
/* Whether it's nice or not, "Inits" can be used on "Final"'d contexts
* so this context may already have an ENGINE! Try to avoid releasing
* the previous handle, re-querying for an ENGINE, and having a
* reinitialisation, when it may all be unecessary. */
goto skip_to_init;
#endif
if (cipher)
{
/* Ensure a context left lying around from last time is cleared
* (the previous check attempted to avoid this if the same
* ENGINE and EVP_CIPHER could be used). */
/* Restore encrypt field: it is zeroed by cleanup */
#ifndef OPENSSL_NO_ENGINE
if(impl)
{
if (!ENGINE_init(impl))
{
return 0;
}
}
else
/* Ask if an ENGINE is reserved for this job */
if(impl)
{
/* There's an ENGINE for this job ... (apparently) */
if(!c)
{
/* One positive side-effect of US's export
* control history, is that we should at least
* be able to avoid using US mispellings of
* "initialisation"? */
return 0;
}
/* We'll use the ENGINE's private cipher definition */
cipher = c;
/* Store the ENGINE functional reference so we know
* 'cipher' came from an ENGINE and we need to release
* it when done. */
}
else
#endif
{
if (!ctx->cipher_data)
{
return 0;
}
}
else
{
}
{
{
return 0;
}
}
}
{
return 0;
}
#ifndef OPENSSL_NO_ENGINE
#endif
/* we assume block size is a power of 2 in *cryptUpdate */
switch(EVP_CIPHER_CTX_mode(ctx)) {
case EVP_CIPH_STREAM_CIPHER:
case EVP_CIPH_ECB_MODE:
break;
case EVP_CIPH_CFB_MODE:
case EVP_CIPH_OFB_MODE:
case EVP_CIPH_CBC_MODE:
break;
default:
return 0;
break;
}
}
}
ctx->final_used=0;
return 1;
}
{
}
{
}
{
}
{
}
{
}
{
}
{
}
{
int i,j,bl;
OPENSSL_assert(inl > 0);
{
{
return 1;
}
else
{
*outl=0;
return 0;
}
}
if (i != 0)
{
{
*outl=0;
return 1;
}
else
{
j=bl-i;
inl-=j;
in+=j;
}
}
else
*outl = 0;
inl-=i;
if (inl > 0)
{
}
if (i != 0)
return 1;
}
{
int ret;
return ret;
}
{
if (b == 1)
{
*outl=0;
return 1;
}
{
if(bl)
{
return 0;
}
*outl = 0;
return 1;
}
n=b-bl;
for (i=bl; i<b; i++)
if(ret)
*outl=b;
return ret;
}
{
int b, fix_len;
if (inl == 0)
{
*outl=0;
return 1;
}
if(ctx->final_used)
{
out+=b;
fix_len = 1;
}
else
fix_len = 0;
return 0;
/* if we have 'decrypted' a multiple of block size, make sure
* we have a copy of this last block */
{
*outl-=b;
}
else
ctx->final_used = 0;
if (fix_len)
*outl += b;
return 1;
}
{
int ret;
return ret;
}
{
int i,b;
int n;
*outl=0;
{
{
return 0;
}
*outl = 0;
return 1;
}
if (b > 1)
{
{
return(0);
}
if (n > b)
{
return(0);
}
for (i=0; i<n; i++)
{
{
return(0);
}
}
for (i=0; i<n; i++)
*outl=n;
}
else
*outl=0;
return(1);
}
int EVP_CIPHER_CTX_cleanup(EVP_CIPHER_CTX *c)
{
{
return 0;
/* Cleanse cipher context data */
if (c->cipher_data)
}
if (c->cipher_data)
OPENSSL_free(c->cipher_data);
#ifndef OPENSSL_NO_ENGINE
if (c->engine)
/* The EVP_CIPHER we used belongs to an ENGINE, release the
* functional reference we held for this reason. */
ENGINE_finish(c->engine);
#endif
memset(c,0,sizeof(EVP_CIPHER_CTX));
return 1;
}
{
{
return 1;
}
return 0;
}
{
return 1;
}
{
int ret;
return 0;
}
return 0;
}
if(ret == -1) {
return 0;
}
return ret;
}