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Member "openssl-1.0.2q/crypto/aes/aes_cfb.c" (20 Nov 2018, 3747 Bytes) of package /linux/misc/openssl-1.0.2q.tar.gz:


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    1 /* crypto/aes/aes_cfb.c */
    2 /* ====================================================================
    3  * Copyright (c) 2002-2006 The OpenSSL Project.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  *
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  *
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in
   14  *    the documentation and/or other materials provided with the
   15  *    distribution.
   16  *
   17  * 3. All advertising materials mentioning features or use of this
   18  *    software must display the following acknowledgment:
   19  *    "This product includes software developed by the OpenSSL Project
   20  *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
   21  *
   22  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
   23  *    endorse or promote products derived from this software without
   24  *    prior written permission. For written permission, please contact
   25  *    openssl-core@openssl.org.
   26  *
   27  * 5. Products derived from this software may not be called "OpenSSL"
   28  *    nor may "OpenSSL" appear in their names without prior written
   29  *    permission of the OpenSSL Project.
   30  *
   31  * 6. Redistributions of any form whatsoever must retain the following
   32  *    acknowledgment:
   33  *    "This product includes software developed by the OpenSSL Project
   34  *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
   35  *
   36  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
   37  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   38  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   39  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
   40  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   41  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   42  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   43  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   44  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   45  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   46  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
   47  * OF THE POSSIBILITY OF SUCH DAMAGE.
   48  * ====================================================================
   49  *
   50  */
   51 
   52 #include <openssl/aes.h>
   53 #include <openssl/modes.h>
   54 
   55 /*
   56  * The input and output encrypted as though 128bit cfb mode is being used.
   57  * The extra state information to record how much of the 128bit block we have
   58  * used is contained in *num;
   59  */
   60 
   61 void AES_cfb128_encrypt(const unsigned char *in, unsigned char *out,
   62                         size_t length, const AES_KEY *key,
   63                         unsigned char *ivec, int *num, const int enc)
   64 {
   65 
   66     CRYPTO_cfb128_encrypt(in, out, length, key, ivec, num, enc,
   67                           (block128_f) AES_encrypt);
   68 }
   69 
   70 /* N.B. This expects the input to be packed, MS bit first */
   71 void AES_cfb1_encrypt(const unsigned char *in, unsigned char *out,
   72                       size_t length, const AES_KEY *key,
   73                       unsigned char *ivec, int *num, const int enc)
   74 {
   75     CRYPTO_cfb128_1_encrypt(in, out, length, key, ivec, num, enc,
   76                             (block128_f) AES_encrypt);
   77 }
   78 
   79 void AES_cfb8_encrypt(const unsigned char *in, unsigned char *out,
   80                       size_t length, const AES_KEY *key,
   81                       unsigned char *ivec, int *num, const int enc)
   82 {
   83     CRYPTO_cfb128_8_encrypt(in, out, length, key, ivec, num, enc,
   84                             (block128_f) AES_encrypt);
   85 }