early-access version 1255
This commit is contained in:
pineappleEA
441
externals/libressl/crypto/modes/ccm128.c
vendored
Executable file
441
externals/libressl/crypto/modes/ccm128.c
vendored
Executable file
@@ -0,0 +1,441 @@
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/* $OpenBSD: ccm128.c,v 1.5 2019/05/08 14:18:25 tb Exp $ */
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/* ====================================================================
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* Copyright (c) 2011 The OpenSSL Project. All rights reserved.
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||||
*
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* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
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||||
*
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||||
* 1. Redistributions of source code must retain the above 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.
|
||||
*
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||||
* 3. All advertising materials mentioning features or use of this
|
||||
* software must display the following acknowledgment:
|
||||
* "This product includes software developed by the OpenSSL Project
|
||||
* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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||||
*
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||||
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
|
||||
* endorse or promote products derived from this software without
|
||||
* prior written permission. For written permission, please contact
|
||||
* openssl-core@openssl.org.
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||||
*
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||||
* 5. Products derived from this software may not be called "OpenSSL"
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||||
* nor may "OpenSSL" appear in their names without prior written
|
||||
* permission of the OpenSSL Project.
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||||
*
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||||
* 6. Redistributions of any form whatsoever must retain the following
|
||||
* acknowledgment:
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||||
* "This product includes software developed by the OpenSSL Project
|
||||
* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
|
||||
* EXPRESSED 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 OpenSSL PROJECT OR
|
||||
* ITS 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.
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||||
* ====================================================================
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*/
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#include <openssl/crypto.h>
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#include "modes_lcl.h"
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#include <string.h>
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#ifndef MODES_DEBUG
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# ifndef NDEBUG
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# define NDEBUG
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# endif
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#endif
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/* First you setup M and L parameters and pass the key schedule.
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* This is called once per session setup... */
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void CRYPTO_ccm128_init(CCM128_CONTEXT *ctx,
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unsigned int M,unsigned int L,void *key,block128_f block)
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{
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memset(ctx->nonce.c,0,sizeof(ctx->nonce.c));
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ctx->nonce.c[0] = ((u8)(L-1)&7) | (u8)(((M-2)/2)&7)<<3;
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ctx->blocks = 0;
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ctx->block = block;
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ctx->key = key;
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}
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/* !!! Following interfaces are to be called *once* per packet !!! */
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/* Then you setup per-message nonce and pass the length of the message */
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int CRYPTO_ccm128_setiv(CCM128_CONTEXT *ctx,
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const unsigned char *nonce,size_t nlen,size_t mlen)
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{
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unsigned int L = ctx->nonce.c[0]&7; /* the L parameter */
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if (nlen<(14-L)) return -1; /* nonce is too short */
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if (sizeof(mlen)==8 && L>=3) {
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ctx->nonce.c[8] = (u8)(mlen>>(56%(sizeof(mlen)*8)));
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ctx->nonce.c[9] = (u8)(mlen>>(48%(sizeof(mlen)*8)));
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ctx->nonce.c[10] = (u8)(mlen>>(40%(sizeof(mlen)*8)));
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ctx->nonce.c[11] = (u8)(mlen>>(32%(sizeof(mlen)*8)));
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}
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else
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ctx->nonce.u[1] = 0;
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ctx->nonce.c[12] = (u8)(mlen>>24);
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ctx->nonce.c[13] = (u8)(mlen>>16);
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ctx->nonce.c[14] = (u8)(mlen>>8);
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ctx->nonce.c[15] = (u8)mlen;
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ctx->nonce.c[0] &= ~0x40; /* clear Adata flag */
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memcpy(&ctx->nonce.c[1],nonce,14-L);
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return 0;
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}
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/* Then you pass additional authentication data, this is optional */
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void CRYPTO_ccm128_aad(CCM128_CONTEXT *ctx,
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const unsigned char *aad,size_t alen)
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{ unsigned int i;
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block128_f block = ctx->block;
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if (alen==0) return;
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ctx->nonce.c[0] |= 0x40; /* set Adata flag */
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(*block)(ctx->nonce.c,ctx->cmac.c,ctx->key),
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ctx->blocks++;
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if (alen<(0x10000-0x100)) {
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ctx->cmac.c[0] ^= (u8)(alen>>8);
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ctx->cmac.c[1] ^= (u8)alen;
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i=2;
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}
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else if (sizeof(alen)==8 && alen>=(size_t)1<<(32%(sizeof(alen)*8))) {
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ctx->cmac.c[0] ^= 0xFF;
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ctx->cmac.c[1] ^= 0xFF;
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ctx->cmac.c[2] ^= (u8)(alen>>(56%(sizeof(alen)*8)));
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ctx->cmac.c[3] ^= (u8)(alen>>(48%(sizeof(alen)*8)));
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ctx->cmac.c[4] ^= (u8)(alen>>(40%(sizeof(alen)*8)));
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ctx->cmac.c[5] ^= (u8)(alen>>(32%(sizeof(alen)*8)));
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ctx->cmac.c[6] ^= (u8)(alen>>24);
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ctx->cmac.c[7] ^= (u8)(alen>>16);
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ctx->cmac.c[8] ^= (u8)(alen>>8);
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ctx->cmac.c[9] ^= (u8)alen;
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i=10;
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}
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else {
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ctx->cmac.c[0] ^= 0xFF;
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ctx->cmac.c[1] ^= 0xFE;
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ctx->cmac.c[2] ^= (u8)(alen>>24);
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ctx->cmac.c[3] ^= (u8)(alen>>16);
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ctx->cmac.c[4] ^= (u8)(alen>>8);
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ctx->cmac.c[5] ^= (u8)alen;
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i=6;
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}
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do {
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for(;i<16 && alen;++i,++aad,--alen)
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ctx->cmac.c[i] ^= *aad;
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(*block)(ctx->cmac.c,ctx->cmac.c,ctx->key),
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ctx->blocks++;
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i=0;
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} while (alen);
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}
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/* Finally you encrypt or decrypt the message */
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/* counter part of nonce may not be larger than L*8 bits,
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* L is not larger than 8, therefore 64-bit counter... */
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static void ctr64_inc(unsigned char *counter) {
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unsigned int n=8;
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u8 c;
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counter += 8;
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do {
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--n;
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c = counter[n];
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++c;
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counter[n] = c;
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if (c) return;
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} while (n);
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}
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int CRYPTO_ccm128_encrypt(CCM128_CONTEXT *ctx,
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const unsigned char *inp, unsigned char *out,
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size_t len)
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{
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size_t n;
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unsigned int i,L;
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unsigned char flags0 = ctx->nonce.c[0];
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block128_f block = ctx->block;
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void * key = ctx->key;
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union { u64 u[2]; u8 c[16]; } scratch;
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if (!(flags0&0x40))
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(*block)(ctx->nonce.c,ctx->cmac.c,key),
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ctx->blocks++;
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ctx->nonce.c[0] = L = flags0&7;
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for (n=0,i=15-L;i<15;++i) {
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n |= ctx->nonce.c[i];
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ctx->nonce.c[i]=0;
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n <<= 8;
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}
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n |= ctx->nonce.c[15]; /* reconstructed length */
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ctx->nonce.c[15]=1;
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if (n!=len) return -1; /* length mismatch */
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ctx->blocks += ((len+15)>>3)|1;
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if (ctx->blocks > (U64(1)<<61)) return -2; /* too much data */
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while (len>=16) {
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#ifdef __STRICT_ALIGNMENT
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union { u64 u[2]; u8 c[16]; } temp;
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memcpy (temp.c,inp,16);
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ctx->cmac.u[0] ^= temp.u[0];
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ctx->cmac.u[1] ^= temp.u[1];
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#else
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ctx->cmac.u[0] ^= ((u64*)inp)[0];
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ctx->cmac.u[1] ^= ((u64*)inp)[1];
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#endif
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(*block)(ctx->cmac.c,ctx->cmac.c,key);
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(*block)(ctx->nonce.c,scratch.c,key);
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ctr64_inc(ctx->nonce.c);
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#ifdef __STRICT_ALIGNMENT
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temp.u[0] ^= scratch.u[0];
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temp.u[1] ^= scratch.u[1];
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memcpy(out,temp.c,16);
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#else
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((u64*)out)[0] = scratch.u[0]^((u64*)inp)[0];
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((u64*)out)[1] = scratch.u[1]^((u64*)inp)[1];
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#endif
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inp += 16;
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out += 16;
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len -= 16;
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}
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if (len) {
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for (i=0; i<len; ++i) ctx->cmac.c[i] ^= inp[i];
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(*block)(ctx->cmac.c,ctx->cmac.c,key);
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(*block)(ctx->nonce.c,scratch.c,key);
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for (i=0; i<len; ++i) out[i] = scratch.c[i]^inp[i];
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}
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for (i=15-L;i<16;++i)
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ctx->nonce.c[i]=0;
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(*block)(ctx->nonce.c,scratch.c,key);
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ctx->cmac.u[0] ^= scratch.u[0];
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ctx->cmac.u[1] ^= scratch.u[1];
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ctx->nonce.c[0] = flags0;
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return 0;
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}
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int CRYPTO_ccm128_decrypt(CCM128_CONTEXT *ctx,
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const unsigned char *inp, unsigned char *out,
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size_t len)
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{
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size_t n;
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unsigned int i,L;
|
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unsigned char flags0 = ctx->nonce.c[0];
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block128_f block = ctx->block;
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void * key = ctx->key;
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union { u64 u[2]; u8 c[16]; } scratch;
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if (!(flags0&0x40))
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(*block)(ctx->nonce.c,ctx->cmac.c,key);
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ctx->nonce.c[0] = L = flags0&7;
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for (n=0,i=15-L;i<15;++i) {
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n |= ctx->nonce.c[i];
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ctx->nonce.c[i]=0;
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n <<= 8;
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}
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n |= ctx->nonce.c[15]; /* reconstructed length */
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ctx->nonce.c[15]=1;
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|
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if (n!=len) return -1;
|
||||
|
||||
while (len>=16) {
|
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#ifdef __STRICT_ALIGNMENT
|
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union { u64 u[2]; u8 c[16]; } temp;
|
||||
#endif
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
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ctr64_inc(ctx->nonce.c);
|
||||
#ifdef __STRICT_ALIGNMENT
|
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memcpy (temp.c,inp,16);
|
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ctx->cmac.u[0] ^= (scratch.u[0] ^= temp.u[0]);
|
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ctx->cmac.u[1] ^= (scratch.u[1] ^= temp.u[1]);
|
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memcpy (out,scratch.c,16);
|
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#else
|
||||
ctx->cmac.u[0] ^= (((u64*)out)[0] = scratch.u[0]^((u64*)inp)[0]);
|
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ctx->cmac.u[1] ^= (((u64*)out)[1] = scratch.u[1]^((u64*)inp)[1]);
|
||||
#endif
|
||||
(*block)(ctx->cmac.c,ctx->cmac.c,key);
|
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|
||||
inp += 16;
|
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out += 16;
|
||||
len -= 16;
|
||||
}
|
||||
|
||||
if (len) {
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
||||
for (i=0; i<len; ++i)
|
||||
ctx->cmac.c[i] ^= (out[i] = scratch.c[i]^inp[i]);
|
||||
(*block)(ctx->cmac.c,ctx->cmac.c,key);
|
||||
}
|
||||
|
||||
for (i=15-L;i<16;++i)
|
||||
ctx->nonce.c[i]=0;
|
||||
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
||||
ctx->cmac.u[0] ^= scratch.u[0];
|
||||
ctx->cmac.u[1] ^= scratch.u[1];
|
||||
|
||||
ctx->nonce.c[0] = flags0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void ctr64_add (unsigned char *counter,size_t inc)
|
||||
{ size_t n=8, val=0;
|
||||
|
||||
counter += 8;
|
||||
do {
|
||||
--n;
|
||||
val += counter[n] + (inc&0xff);
|
||||
counter[n] = (unsigned char)val;
|
||||
val >>= 8; /* carry bit */
|
||||
inc >>= 8;
|
||||
} while(n && (inc || val));
|
||||
}
|
||||
|
||||
int CRYPTO_ccm128_encrypt_ccm64(CCM128_CONTEXT *ctx,
|
||||
const unsigned char *inp, unsigned char *out,
|
||||
size_t len,ccm128_f stream)
|
||||
{
|
||||
size_t n;
|
||||
unsigned int i,L;
|
||||
unsigned char flags0 = ctx->nonce.c[0];
|
||||
block128_f block = ctx->block;
|
||||
void * key = ctx->key;
|
||||
union { u64 u[2]; u8 c[16]; } scratch;
|
||||
|
||||
if (!(flags0&0x40))
|
||||
(*block)(ctx->nonce.c,ctx->cmac.c,key),
|
||||
ctx->blocks++;
|
||||
|
||||
ctx->nonce.c[0] = L = flags0&7;
|
||||
for (n=0,i=15-L;i<15;++i) {
|
||||
n |= ctx->nonce.c[i];
|
||||
ctx->nonce.c[i]=0;
|
||||
n <<= 8;
|
||||
}
|
||||
n |= ctx->nonce.c[15]; /* reconstructed length */
|
||||
ctx->nonce.c[15]=1;
|
||||
|
||||
if (n!=len) return -1; /* length mismatch */
|
||||
|
||||
ctx->blocks += ((len+15)>>3)|1;
|
||||
if (ctx->blocks > (U64(1)<<61)) return -2; /* too much data */
|
||||
|
||||
if ((n=len/16)) {
|
||||
(*stream)(inp,out,n,key,ctx->nonce.c,ctx->cmac.c);
|
||||
n *= 16;
|
||||
inp += n;
|
||||
out += n;
|
||||
len -= n;
|
||||
if (len) ctr64_add(ctx->nonce.c,n/16);
|
||||
}
|
||||
|
||||
if (len) {
|
||||
for (i=0; i<len; ++i) ctx->cmac.c[i] ^= inp[i];
|
||||
(*block)(ctx->cmac.c,ctx->cmac.c,key);
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
||||
for (i=0; i<len; ++i) out[i] = scratch.c[i]^inp[i];
|
||||
}
|
||||
|
||||
for (i=15-L;i<16;++i)
|
||||
ctx->nonce.c[i]=0;
|
||||
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
||||
ctx->cmac.u[0] ^= scratch.u[0];
|
||||
ctx->cmac.u[1] ^= scratch.u[1];
|
||||
|
||||
ctx->nonce.c[0] = flags0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int CRYPTO_ccm128_decrypt_ccm64(CCM128_CONTEXT *ctx,
|
||||
const unsigned char *inp, unsigned char *out,
|
||||
size_t len,ccm128_f stream)
|
||||
{
|
||||
size_t n;
|
||||
unsigned int i,L;
|
||||
unsigned char flags0 = ctx->nonce.c[0];
|
||||
block128_f block = ctx->block;
|
||||
void * key = ctx->key;
|
||||
union { u64 u[2]; u8 c[16]; } scratch;
|
||||
|
||||
if (!(flags0&0x40))
|
||||
(*block)(ctx->nonce.c,ctx->cmac.c,key);
|
||||
|
||||
ctx->nonce.c[0] = L = flags0&7;
|
||||
for (n=0,i=15-L;i<15;++i) {
|
||||
n |= ctx->nonce.c[i];
|
||||
ctx->nonce.c[i]=0;
|
||||
n <<= 8;
|
||||
}
|
||||
n |= ctx->nonce.c[15]; /* reconstructed length */
|
||||
ctx->nonce.c[15]=1;
|
||||
|
||||
if (n!=len) return -1;
|
||||
|
||||
if ((n=len/16)) {
|
||||
(*stream)(inp,out,n,key,ctx->nonce.c,ctx->cmac.c);
|
||||
n *= 16;
|
||||
inp += n;
|
||||
out += n;
|
||||
len -= n;
|
||||
if (len) ctr64_add(ctx->nonce.c,n/16);
|
||||
}
|
||||
|
||||
if (len) {
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
||||
for (i=0; i<len; ++i)
|
||||
ctx->cmac.c[i] ^= (out[i] = scratch.c[i]^inp[i]);
|
||||
(*block)(ctx->cmac.c,ctx->cmac.c,key);
|
||||
}
|
||||
|
||||
for (i=15-L;i<16;++i)
|
||||
ctx->nonce.c[i]=0;
|
||||
|
||||
(*block)(ctx->nonce.c,scratch.c,key);
|
||||
ctx->cmac.u[0] ^= scratch.u[0];
|
||||
ctx->cmac.u[1] ^= scratch.u[1];
|
||||
|
||||
ctx->nonce.c[0] = flags0;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
size_t CRYPTO_ccm128_tag(CCM128_CONTEXT *ctx,unsigned char *tag,size_t len)
|
||||
{ unsigned int M = (ctx->nonce.c[0]>>3)&7; /* the M parameter */
|
||||
|
||||
M *= 2; M += 2;
|
||||
if (len != M) return 0;
|
||||
memcpy(tag,ctx->cmac.c,M);
|
||||
return M;
|
||||
}
|
||||
Reference in New Issue
Block a user