From 67326634496ef21b4acbf4cef2f05040d34aef9b Mon Sep 17 00:00:00 2001 From: marha Date: Tue, 10 Apr 2012 11:41:26 +0200 Subject: Update to openssl-1.0.1 --- openssl/crypto/modes/ccm128.c | 441 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 441 insertions(+) create mode 100644 openssl/crypto/modes/ccm128.c (limited to 'openssl/crypto/modes/ccm128.c') diff --git a/openssl/crypto/modes/ccm128.c b/openssl/crypto/modes/ccm128.c new file mode 100644 index 000000000..c9b35e5b3 --- /dev/null +++ b/openssl/crypto/modes/ccm128.c @@ -0,0 +1,441 @@ +/* ==================================================================== + * Copyright (c) 2011 The OpenSSL Project. All rights reserved. + * + * 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 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. + * + * 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/)" + * + * 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. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "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. + * ==================================================================== + */ + +#include +#include "modes_lcl.h" +#include + +#ifndef MODES_DEBUG +# ifndef NDEBUG +# define NDEBUG +# endif +#endif +#include + +/* First you setup M and L parameters and pass the key schedule. + * This is called once per session setup... */ +void CRYPTO_ccm128_init(CCM128_CONTEXT *ctx, + unsigned int M,unsigned int L,void *key,block128_f block) +{ + memset(ctx->nonce.c,0,sizeof(ctx->nonce.c)); + ctx->nonce.c[0] = ((u8)(L-1)&7) | (u8)(((M-2)/2)&7)<<3; + ctx->blocks = 0; + ctx->block = block; + ctx->key = key; +} + +/* !!! Following interfaces are to be called *once* per packet !!! */ + +/* Then you setup per-message nonce and pass the length of the message */ +int CRYPTO_ccm128_setiv(CCM128_CONTEXT *ctx, + const unsigned char *nonce,size_t nlen,size_t mlen) +{ + unsigned int L = ctx->nonce.c[0]&7; /* the L parameter */ + + if (nlen<(14-L)) return -1; /* nonce is too short */ + + if (sizeof(mlen)==8 && L>=3) { + ctx->nonce.c[8] = (u8)(mlen>>(56%(sizeof(mlen)*8))); + ctx->nonce.c[9] = (u8)(mlen>>(48%(sizeof(mlen)*8))); + ctx->nonce.c[10] = (u8)(mlen>>(40%(sizeof(mlen)*8))); + ctx->nonce.c[11] = (u8)(mlen>>(32%(sizeof(mlen)*8))); + } + else + *(u32*)(&ctx->nonce.c[8]) = 0; + + ctx->nonce.c[12] = (u8)(mlen>>24); + ctx->nonce.c[13] = (u8)(mlen>>16); + ctx->nonce.c[14] = (u8)(mlen>>8); + ctx->nonce.c[15] = (u8)mlen; + + ctx->nonce.c[0] &= ~0x40; /* clear Adata flag */ + memcpy(&ctx->nonce.c[1],nonce,14-L); + + return 0; +} + +/* Then you pass additional authentication data, this is optional */ +void CRYPTO_ccm128_aad(CCM128_CONTEXT *ctx, + const unsigned char *aad,size_t alen) +{ unsigned int i; + block128_f block = ctx->block; + + if (alen==0) return; + + ctx->nonce.c[0] |= 0x40; /* set Adata flag */ + (*block)(ctx->nonce.c,ctx->cmac.c,ctx->key), + ctx->blocks++; + + if (alen<(0x10000-0x100)) { + ctx->cmac.c[0] ^= (u8)(alen>>8); + ctx->cmac.c[1] ^= (u8)alen; + i=2; + } + else if (sizeof(alen)==8 && alen>=(size_t)1<<(32%(sizeof(alen)*8))) { + ctx->cmac.c[0] ^= 0xFF; + ctx->cmac.c[1] ^= 0xFF; + ctx->cmac.c[2] ^= (u8)(alen>>(56%(sizeof(alen)*8))); + ctx->cmac.c[3] ^= (u8)(alen>>(48%(sizeof(alen)*8))); + ctx->cmac.c[4] ^= (u8)(alen>>(40%(sizeof(alen)*8))); + ctx->cmac.c[5] ^= (u8)(alen>>(32%(sizeof(alen)*8))); + ctx->cmac.c[6] ^= (u8)(alen>>24); + ctx->cmac.c[7] ^= (u8)(alen>>16); + ctx->cmac.c[8] ^= (u8)(alen>>8); + ctx->cmac.c[9] ^= (u8)alen; + i=10; + } + else { + ctx->cmac.c[0] ^= 0xFF; + ctx->cmac.c[1] ^= 0xFE; + ctx->cmac.c[2] ^= (u8)(alen>>24); + ctx->cmac.c[3] ^= (u8)(alen>>16); + ctx->cmac.c[4] ^= (u8)(alen>>8); + ctx->cmac.c[5] ^= (u8)alen; + i=6; + } + + do { + for(;i<16 && alen;++i,++aad,--alen) + ctx->cmac.c[i] ^= *aad; + (*block)(ctx->cmac.c,ctx->cmac.c,ctx->key), + ctx->blocks++; + i=0; + } while (alen); +} + +/* Finally you encrypt or decrypt the message */ + +/* counter part of nonce may not be larger than L*8 bits, + * L is not larger than 8, therefore 64-bit counter... */ +static void ctr64_inc(unsigned char *counter) { + unsigned int n=8; + u8 c; + + counter += 8; + do { + --n; + c = counter[n]; + ++c; + counter[n] = c; + if (c) return; + } while (n); +} + +int CRYPTO_ccm128_encrypt(CCM128_CONTEXT *ctx, + const unsigned char *inp, unsigned char *out, + size_t len) +{ + 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 */ + + while (len>=16) { +#if defined(STRICT_ALIGNMENT) + union { u64 u[2]; u8 c[16]; } temp; + + memcpy (temp.c,inp,16); + ctx->cmac.u[0] ^= temp.u[0]; + ctx->cmac.u[1] ^= temp.u[1]; +#else + ctx->cmac.u[0] ^= ((u64*)inp)[0]; + ctx->cmac.u[1] ^= ((u64*)inp)[1]; +#endif + (*block)(ctx->cmac.c,ctx->cmac.c,key); + (*block)(ctx->nonce.c,scratch.c,key); + ctr64_inc(ctx->nonce.c); +#if defined(STRICT_ALIGNMENT) + temp.u[0] ^= scratch.u[0]; + temp.u[1] ^= scratch.u[1]; + memcpy(out,temp.c,16); +#else + ((u64*)out)[0] = scratch.u[0]^((u64*)inp)[0]; + ((u64*)out)[1] = scratch.u[1]^((u64*)inp)[1]; +#endif + inp += 16; + out += 16; + len -= 16; + } + + if (len) { + for (i=0; icmac.c[i] ^= inp[i]; + (*block)(ctx->cmac.c,ctx->cmac.c,key); + (*block)(ctx->nonce.c,scratch.c,key); + for (i=0; inonce.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(CCM128_CONTEXT *ctx, + const unsigned char *inp, unsigned char *out, + size_t len) +{ + 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; + + while (len>=16) { +#if defined(STRICT_ALIGNMENT) + union { u64 u[2]; u8 c[16]; } temp; +#endif + (*block)(ctx->nonce.c,scratch.c,key); + ctr64_inc(ctx->nonce.c); +#if defined(STRICT_ALIGNMENT) + memcpy (temp.c,inp,16); + ctx->cmac.u[0] ^= (scratch.u[0] ^= temp.u[0]); + ctx->cmac.u[1] ^= (scratch.u[1] ^= temp.u[1]); + memcpy (out,scratch.c,16); +#else + ctx->cmac.u[0] ^= (((u64*)out)[0] = scratch.u[0]^((u64*)inp)[0]); + ctx->cmac.u[1] ^= (((u64*)out)[1] = scratch.u[1]^((u64*)inp)[1]); +#endif + (*block)(ctx->cmac.c,ctx->cmac.c,key); + + inp += 16; + out += 16; + len -= 16; + } + + if (len) { + (*block)(ctx->nonce.c,scratch.c,key); + for (i=0; icmac.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; icmac.c[i] ^= inp[i]; + (*block)(ctx->cmac.c,ctx->cmac.c,key); + (*block)(ctx->nonce.c,scratch.c,key); + for (i=0; inonce.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; icmac.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 (lencmac.c,M); + return M; +} -- cgit v1.2.3