| /* ==================================================================== |
| * Copyright (c) 2011-2013 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 |
| * licensing@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 <openssl/opensslconf.h> |
| |
| #include <stdio.h> |
| #include <string.h> |
| |
| #if !defined(OPENSSL_NO_AES) && !defined(OPENSSL_NO_SHA1) |
| |
| #include <openssl/evp.h> |
| #include <openssl/objects.h> |
| #include <openssl/aes.h> |
| #include <openssl/sha.h> |
| #include "evp_locl.h" |
| |
| #ifndef EVP_CIPH_FLAG_AEAD_CIPHER |
| #define EVP_CIPH_FLAG_AEAD_CIPHER 0x200000 |
| #define EVP_CTRL_AEAD_TLS1_AAD 0x16 |
| #define EVP_CTRL_AEAD_SET_MAC_KEY 0x17 |
| #endif |
| |
| #if !defined(EVP_CIPH_FLAG_DEFAULT_ASN1) |
| #define EVP_CIPH_FLAG_DEFAULT_ASN1 0 |
| #endif |
| |
| #define TLS1_1_VERSION 0x0302 |
| |
| typedef struct |
| { |
| AES_KEY ks; |
| SHA_CTX head,tail,md; |
| size_t payload_length; /* AAD length in decrypt case */ |
| union { |
| unsigned int tls_ver; |
| unsigned char tls_aad[16]; /* 13 used */ |
| } aux; |
| } EVP_AES_HMAC_SHA1; |
| |
| #define NO_PAYLOAD_LENGTH ((size_t)-1) |
| |
| #if defined(AES_ASM) && ( \ |
| defined(__x86_64) || defined(__x86_64__) || \ |
| defined(_M_AMD64) || defined(_M_X64) || \ |
| defined(__INTEL__) ) |
| |
| #if defined(__GNUC__) && __GNUC__>=2 && !defined(PEDANTIC) |
| # define BSWAP(x) ({ unsigned int r=(x); asm ("bswapl %0":"=r"(r):"0"(r)); r; }) |
| #endif |
| |
| extern unsigned int OPENSSL_ia32cap_P[2]; |
| #define AESNI_CAPABLE (1<<(57-32)) |
| |
| int aesni_set_encrypt_key(const unsigned char *userKey, int bits, |
| AES_KEY *key); |
| int aesni_set_decrypt_key(const unsigned char *userKey, int bits, |
| AES_KEY *key); |
| |
| void aesni_cbc_encrypt(const unsigned char *in, |
| unsigned char *out, |
| size_t length, |
| const AES_KEY *key, |
| unsigned char *ivec, int enc); |
| |
| void aesni_cbc_sha1_enc (const void *inp, void *out, size_t blocks, |
| const AES_KEY *key, unsigned char iv[16], |
| SHA_CTX *ctx,const void *in0); |
| |
| #define data(ctx) ((EVP_AES_HMAC_SHA1 *)(ctx)->cipher_data) |
| |
| static int aesni_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx, |
| const unsigned char *inkey, |
| const unsigned char *iv, int enc) |
| { |
| EVP_AES_HMAC_SHA1 *key = data(ctx); |
| int ret; |
| |
| if (enc) |
| ret=aesni_set_encrypt_key(inkey,ctx->key_len*8,&key->ks); |
| else |
| ret=aesni_set_decrypt_key(inkey,ctx->key_len*8,&key->ks); |
| |
| SHA1_Init(&key->head); /* handy when benchmarking */ |
| key->tail = key->head; |
| key->md = key->head; |
| |
| key->payload_length = NO_PAYLOAD_LENGTH; |
| |
| return ret<0?0:1; |
| } |
| |
| #define STITCHED_CALL |
| |
| #if !defined(STITCHED_CALL) |
| #define aes_off 0 |
| #endif |
| |
| void sha1_block_data_order (void *c,const void *p,size_t len); |
| |
| static void sha1_update(SHA_CTX *c,const void *data,size_t len) |
| { const unsigned char *ptr = data; |
| size_t res; |
| |
| if ((res = c->num)) { |
| res = SHA_CBLOCK-res; |
| if (len<res) res=len; |
| SHA1_Update (c,ptr,res); |
| ptr += res; |
| len -= res; |
| } |
| |
| res = len % SHA_CBLOCK; |
| len -= res; |
| |
| if (len) { |
| sha1_block_data_order(c,ptr,len/SHA_CBLOCK); |
| |
| ptr += len; |
| c->Nh += len>>29; |
| c->Nl += len<<=3; |
| if (c->Nl<(unsigned int)len) c->Nh++; |
| } |
| |
| if (res) |
| SHA1_Update(c,ptr,res); |
| } |
| |
| #ifdef SHA1_Update |
| #undef SHA1_Update |
| #endif |
| #define SHA1_Update sha1_update |
| |
| static int aesni_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, |
| const unsigned char *in, size_t len) |
| { |
| EVP_AES_HMAC_SHA1 *key = data(ctx); |
| unsigned int l; |
| size_t plen = key->payload_length, |
| iv = 0, /* explicit IV in TLS 1.1 and later */ |
| sha_off = 0; |
| #if defined(STITCHED_CALL) |
| size_t aes_off = 0, |
| blocks; |
| |
| sha_off = SHA_CBLOCK-key->md.num; |
| #endif |
| |
| key->payload_length = NO_PAYLOAD_LENGTH; |
| |
| if (len%AES_BLOCK_SIZE) return 0; |
| |
| if (ctx->encrypt) { |
| if (plen==NO_PAYLOAD_LENGTH) |
| plen = len; |
| else if (len!=((plen+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE)) |
| return 0; |
| else if (key->aux.tls_ver >= TLS1_1_VERSION) |
| iv = AES_BLOCK_SIZE; |
| |
| #if defined(STITCHED_CALL) |
| if (plen>(sha_off+iv) && (blocks=(plen-(sha_off+iv))/SHA_CBLOCK)) { |
| SHA1_Update(&key->md,in+iv,sha_off); |
| |
| aesni_cbc_sha1_enc(in,out,blocks,&key->ks, |
| ctx->iv,&key->md,in+iv+sha_off); |
| blocks *= SHA_CBLOCK; |
| aes_off += blocks; |
| sha_off += blocks; |
| key->md.Nh += blocks>>29; |
| key->md.Nl += blocks<<=3; |
| if (key->md.Nl<(unsigned int)blocks) key->md.Nh++; |
| } else { |
| sha_off = 0; |
| } |
| #endif |
| sha_off += iv; |
| SHA1_Update(&key->md,in+sha_off,plen-sha_off); |
| |
| if (plen!=len) { /* "TLS" mode of operation */ |
| if (in!=out) |
| memcpy(out+aes_off,in+aes_off,plen-aes_off); |
| |
| /* calculate HMAC and append it to payload */ |
| SHA1_Final(out+plen,&key->md); |
| key->md = key->tail; |
| SHA1_Update(&key->md,out+plen,SHA_DIGEST_LENGTH); |
| SHA1_Final(out+plen,&key->md); |
| |
| /* pad the payload|hmac */ |
| plen += SHA_DIGEST_LENGTH; |
| for (l=len-plen-1;plen<len;plen++) out[plen]=l; |
| /* encrypt HMAC|padding at once */ |
| aesni_cbc_encrypt(out+aes_off,out+aes_off,len-aes_off, |
| &key->ks,ctx->iv,1); |
| } else { |
| aesni_cbc_encrypt(in+aes_off,out+aes_off,len-aes_off, |
| &key->ks,ctx->iv,1); |
| } |
| } else { |
| union { unsigned int u[SHA_DIGEST_LENGTH/sizeof(unsigned int)]; |
| unsigned char c[32+SHA_DIGEST_LENGTH]; } mac, *pmac; |
| |
| /* arrange cache line alignment */ |
| pmac = (void *)(((size_t)mac.c+31)&((size_t)0-32)); |
| |
| /* decrypt HMAC|padding at once */ |
| aesni_cbc_encrypt(in,out,len, |
| &key->ks,ctx->iv,0); |
| |
| if (plen) { /* "TLS" mode of operation */ |
| size_t inp_len, mask, j, i; |
| unsigned int res, maxpad, pad, bitlen; |
| int ret = 1; |
| union { unsigned int u[SHA_LBLOCK]; |
| unsigned char c[SHA_CBLOCK]; } |
| *data = (void *)key->md.data; |
| |
| if ((key->aux.tls_aad[plen-4]<<8|key->aux.tls_aad[plen-3]) |
| >= TLS1_1_VERSION) |
| iv = AES_BLOCK_SIZE; |
| |
| if (len<(iv+SHA_DIGEST_LENGTH+1)) |
| return 0; |
| |
| /* omit explicit iv */ |
| out += iv; |
| len -= iv; |
| |
| /* figure out payload length */ |
| pad = out[len-1]; |
| maxpad = len-(SHA_DIGEST_LENGTH+1); |
| maxpad |= (255-maxpad)>>(sizeof(maxpad)*8-8); |
| maxpad &= 255; |
| |
| inp_len = len - (SHA_DIGEST_LENGTH+pad+1); |
| mask = (0-((inp_len-len)>>(sizeof(inp_len)*8-1))); |
| inp_len &= mask; |
| ret &= (int)mask; |
| |
| key->aux.tls_aad[plen-2] = inp_len>>8; |
| key->aux.tls_aad[plen-1] = inp_len; |
| |
| /* calculate HMAC */ |
| key->md = key->head; |
| SHA1_Update(&key->md,key->aux.tls_aad,plen); |
| |
| #if 1 |
| len -= SHA_DIGEST_LENGTH; /* amend mac */ |
| if (len>=(256+SHA_CBLOCK)) { |
| j = (len-(256+SHA_CBLOCK))&(0-SHA_CBLOCK); |
| j += SHA_CBLOCK-key->md.num; |
| SHA1_Update(&key->md,out,j); |
| out += j; |
| len -= j; |
| inp_len -= j; |
| } |
| |
| /* but pretend as if we hashed padded payload */ |
| bitlen = key->md.Nl+(inp_len<<3); /* at most 18 bits */ |
| #ifdef BSWAP |
| bitlen = BSWAP(bitlen); |
| #else |
| mac.c[0] = 0; |
| mac.c[1] = (unsigned char)(bitlen>>16); |
| mac.c[2] = (unsigned char)(bitlen>>8); |
| mac.c[3] = (unsigned char)bitlen; |
| bitlen = mac.u[0]; |
| #endif |
| |
| pmac->u[0]=0; |
| pmac->u[1]=0; |
| pmac->u[2]=0; |
| pmac->u[3]=0; |
| pmac->u[4]=0; |
| |
| for (res=key->md.num, j=0;j<len;j++) { |
| size_t c = out[j]; |
| mask = (j-inp_len)>>(sizeof(j)*8-8); |
| c &= mask; |
| c |= 0x80&~mask&~((inp_len-j)>>(sizeof(j)*8-8)); |
| data->c[res++]=(unsigned char)c; |
| |
| if (res!=SHA_CBLOCK) continue; |
| |
| mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1)); |
| data->u[SHA_LBLOCK-1] |= bitlen&mask; |
| sha1_block_data_order(&key->md,data,1); |
| mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1)); |
| pmac->u[0] |= key->md.h0 & mask; |
| pmac->u[1] |= key->md.h1 & mask; |
| pmac->u[2] |= key->md.h2 & mask; |
| pmac->u[3] |= key->md.h3 & mask; |
| pmac->u[4] |= key->md.h4 & mask; |
| res=0; |
| } |
| |
| for(i=res;i<SHA_CBLOCK;i++,j++) data->c[i]=0; |
| |
| if (res>SHA_CBLOCK-8) { |
| mask = 0-((inp_len+8-j)>>(sizeof(j)*8-1)); |
| data->u[SHA_LBLOCK-1] |= bitlen&mask; |
| sha1_block_data_order(&key->md,data,1); |
| mask &= 0-((j-inp_len-73)>>(sizeof(j)*8-1)); |
| pmac->u[0] |= key->md.h0 & mask; |
| pmac->u[1] |= key->md.h1 & mask; |
| pmac->u[2] |= key->md.h2 & mask; |
| pmac->u[3] |= key->md.h3 & mask; |
| pmac->u[4] |= key->md.h4 & mask; |
| |
| memset(data,0,SHA_CBLOCK); |
| j+=64; |
| } |
| data->u[SHA_LBLOCK-1] = bitlen; |
| sha1_block_data_order(&key->md,data,1); |
| mask = 0-((j-inp_len-73)>>(sizeof(j)*8-1)); |
| pmac->u[0] |= key->md.h0 & mask; |
| pmac->u[1] |= key->md.h1 & mask; |
| pmac->u[2] |= key->md.h2 & mask; |
| pmac->u[3] |= key->md.h3 & mask; |
| pmac->u[4] |= key->md.h4 & mask; |
| |
| #ifdef BSWAP |
| pmac->u[0] = BSWAP(pmac->u[0]); |
| pmac->u[1] = BSWAP(pmac->u[1]); |
| pmac->u[2] = BSWAP(pmac->u[2]); |
| pmac->u[3] = BSWAP(pmac->u[3]); |
| pmac->u[4] = BSWAP(pmac->u[4]); |
| #else |
| for (i=0;i<5;i++) { |
| res = pmac->u[i]; |
| pmac->c[4*i+0]=(unsigned char)(res>>24); |
| pmac->c[4*i+1]=(unsigned char)(res>>16); |
| pmac->c[4*i+2]=(unsigned char)(res>>8); |
| pmac->c[4*i+3]=(unsigned char)res; |
| } |
| #endif |
| len += SHA_DIGEST_LENGTH; |
| #else |
| SHA1_Update(&key->md,out,inp_len); |
| res = key->md.num; |
| SHA1_Final(pmac->c,&key->md); |
| |
| { |
| unsigned int inp_blocks, pad_blocks; |
| |
| /* but pretend as if we hashed padded payload */ |
| inp_blocks = 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1)); |
| res += (unsigned int)(len-inp_len); |
| pad_blocks = res / SHA_CBLOCK; |
| res %= SHA_CBLOCK; |
| pad_blocks += 1+((SHA_CBLOCK-9-res)>>(sizeof(res)*8-1)); |
| for (;inp_blocks<pad_blocks;inp_blocks++) |
| sha1_block_data_order(&key->md,data,1); |
| } |
| #endif |
| key->md = key->tail; |
| SHA1_Update(&key->md,pmac->c,SHA_DIGEST_LENGTH); |
| SHA1_Final(pmac->c,&key->md); |
| |
| /* verify HMAC */ |
| out += inp_len; |
| len -= inp_len; |
| #if 1 |
| { |
| unsigned char *p = out+len-1-maxpad-SHA_DIGEST_LENGTH; |
| size_t off = out-p; |
| unsigned int c, cmask; |
| |
| maxpad += SHA_DIGEST_LENGTH; |
| for (res=0,i=0,j=0;j<maxpad;j++) { |
| c = p[j]; |
| cmask = ((int)(j-off-SHA_DIGEST_LENGTH))>>(sizeof(int)*8-1); |
| res |= (c^pad)&~cmask; /* ... and padding */ |
| cmask &= ((int)(off-1-j))>>(sizeof(int)*8-1); |
| res |= (c^pmac->c[i])&cmask; |
| i += 1&cmask; |
| } |
| maxpad -= SHA_DIGEST_LENGTH; |
| |
| res = 0-((0-res)>>(sizeof(res)*8-1)); |
| ret &= (int)~res; |
| } |
| #else |
| for (res=0,i=0;i<SHA_DIGEST_LENGTH;i++) |
| res |= out[i]^pmac->c[i]; |
| res = 0-((0-res)>>(sizeof(res)*8-1)); |
| ret &= (int)~res; |
| |
| /* verify padding */ |
| pad = (pad&~res) | (maxpad&res); |
| out = out+len-1-pad; |
| for (res=0,i=0;i<pad;i++) |
| res |= out[i]^pad; |
| |
| res = (0-res)>>(sizeof(res)*8-1); |
| ret &= (int)~res; |
| #endif |
| return ret; |
| } else { |
| SHA1_Update(&key->md,out,len); |
| } |
| } |
| |
| return 1; |
| } |
| |
| static int aesni_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) |
| { |
| EVP_AES_HMAC_SHA1 *key = data(ctx); |
| |
| switch (type) |
| { |
| case EVP_CTRL_AEAD_SET_MAC_KEY: |
| { |
| unsigned int i; |
| unsigned char hmac_key[64]; |
| |
| memset (hmac_key,0,sizeof(hmac_key)); |
| |
| if (arg > (int)sizeof(hmac_key)) { |
| SHA1_Init(&key->head); |
| SHA1_Update(&key->head,ptr,arg); |
| SHA1_Final(hmac_key,&key->head); |
| } else { |
| memcpy(hmac_key,ptr,arg); |
| } |
| |
| for (i=0;i<sizeof(hmac_key);i++) |
| hmac_key[i] ^= 0x36; /* ipad */ |
| SHA1_Init(&key->head); |
| SHA1_Update(&key->head,hmac_key,sizeof(hmac_key)); |
| |
| for (i=0;i<sizeof(hmac_key);i++) |
| hmac_key[i] ^= 0x36^0x5c; /* opad */ |
| SHA1_Init(&key->tail); |
| SHA1_Update(&key->tail,hmac_key,sizeof(hmac_key)); |
| |
| OPENSSL_cleanse(hmac_key,sizeof(hmac_key)); |
| |
| return 1; |
| } |
| case EVP_CTRL_AEAD_TLS1_AAD: |
| { |
| unsigned char *p=ptr; |
| unsigned int len=p[arg-2]<<8|p[arg-1]; |
| |
| if (ctx->encrypt) |
| { |
| key->payload_length = len; |
| if ((key->aux.tls_ver=p[arg-4]<<8|p[arg-3]) >= TLS1_1_VERSION) { |
| len -= AES_BLOCK_SIZE; |
| p[arg-2] = len>>8; |
| p[arg-1] = len; |
| } |
| key->md = key->head; |
| SHA1_Update(&key->md,p,arg); |
| |
| return (int)(((len+SHA_DIGEST_LENGTH+AES_BLOCK_SIZE)&-AES_BLOCK_SIZE) |
| - len); |
| } |
| else |
| { |
| if (arg>13) arg = 13; |
| memcpy(key->aux.tls_aad,ptr,arg); |
| key->payload_length = arg; |
| |
| return SHA_DIGEST_LENGTH; |
| } |
| } |
| default: |
| return -1; |
| } |
| } |
| |
| static EVP_CIPHER aesni_128_cbc_hmac_sha1_cipher = |
| { |
| #ifdef NID_aes_128_cbc_hmac_sha1 |
| NID_aes_128_cbc_hmac_sha1, |
| #else |
| NID_undef, |
| #endif |
| 16,16,16, |
| EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER, |
| aesni_cbc_hmac_sha1_init_key, |
| aesni_cbc_hmac_sha1_cipher, |
| NULL, |
| sizeof(EVP_AES_HMAC_SHA1), |
| EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv, |
| EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv, |
| aesni_cbc_hmac_sha1_ctrl, |
| NULL |
| }; |
| |
| static EVP_CIPHER aesni_256_cbc_hmac_sha1_cipher = |
| { |
| #ifdef NID_aes_256_cbc_hmac_sha1 |
| NID_aes_256_cbc_hmac_sha1, |
| #else |
| NID_undef, |
| #endif |
| 16,32,16, |
| EVP_CIPH_CBC_MODE|EVP_CIPH_FLAG_DEFAULT_ASN1|EVP_CIPH_FLAG_AEAD_CIPHER, |
| aesni_cbc_hmac_sha1_init_key, |
| aesni_cbc_hmac_sha1_cipher, |
| NULL, |
| sizeof(EVP_AES_HMAC_SHA1), |
| EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_set_asn1_iv, |
| EVP_CIPH_FLAG_DEFAULT_ASN1?NULL:EVP_CIPHER_get_asn1_iv, |
| aesni_cbc_hmac_sha1_ctrl, |
| NULL |
| }; |
| |
| const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void) |
| { |
| return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE? |
| &aesni_128_cbc_hmac_sha1_cipher:NULL); |
| } |
| |
| const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void) |
| { |
| return(OPENSSL_ia32cap_P[1]&AESNI_CAPABLE? |
| &aesni_256_cbc_hmac_sha1_cipher:NULL); |
| } |
| #else |
| const EVP_CIPHER *EVP_aes_128_cbc_hmac_sha1(void) |
| { |
| return NULL; |
| } |
| const EVP_CIPHER *EVP_aes_256_cbc_hmac_sha1(void) |
| { |
| return NULL; |
| } |
| #endif |
| #endif |