diff options
Diffstat (limited to 'openssl/crypto/evp/e_rc4_hmac_md5.c')
| -rw-r--r-- | openssl/crypto/evp/e_rc4_hmac_md5.c | 293 |
1 files changed, 293 insertions, 0 deletions
diff --git a/openssl/crypto/evp/e_rc4_hmac_md5.c b/openssl/crypto/evp/e_rc4_hmac_md5.c new file mode 100644 index 000000000..eaa7a5312 --- /dev/null +++ b/openssl/crypto/evp/e_rc4_hmac_md5.c @@ -0,0 +1,293 @@ +/* ==================================================================== + * 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 + * 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_RC4) && !defined(OPENSSL_NO_MD5) + +#include <openssl/evp.h> +#include <openssl/objects.h> +#include <openssl/rc4.h> +#include <openssl/md5.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 + +/* FIXME: surely this is available elsewhere? */ +#define EVP_RC4_KEY_SIZE 16 + +typedef struct + { + RC4_KEY ks; + MD5_CTX head,tail,md; + size_t payload_length; + } EVP_RC4_HMAC_MD5; + +void rc4_md5_enc (RC4_KEY *key, const void *in0, void *out, + MD5_CTX *ctx,const void *inp,size_t blocks); + +#define data(ctx) ((EVP_RC4_HMAC_MD5 *)(ctx)->cipher_data) + +static int rc4_hmac_md5_init_key(EVP_CIPHER_CTX *ctx, + const unsigned char *inkey, + const unsigned char *iv, int enc) + { + EVP_RC4_HMAC_MD5 *key = data(ctx); + + RC4_set_key(&key->ks,EVP_CIPHER_CTX_key_length(ctx), + inkey); + + MD5_Init(&key->head); /* handy when benchmarking */ + key->tail = key->head; + key->md = key->head; + + key->payload_length = 0; + + return 1; + } + +#if !defined(OPENSSL_NO_ASM) && ( \ + defined(__x86_64) || defined(__x86_64__) || \ + defined(_M_AMD64) || defined(_M_X64) || \ + defined(__INTEL__) ) && \ + !(defined(__APPLE__) && defined(__MACH__)) +#define STITCHED_CALL +#endif + +#if !defined(STITCHED_CALL) +#define rc4_off 0 +#define md5_off 0 +#endif + +static int rc4_hmac_md5_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, + const unsigned char *in, size_t len) + { + EVP_RC4_HMAC_MD5 *key = data(ctx); +#if defined(STITCHED_CALL) + size_t rc4_off = 32-1-(key->ks.x&(32-1)), /* 32 is $MOD from rc4_md5-x86_64.pl */ + md5_off = MD5_CBLOCK-key->md.num, + blocks; + unsigned int l; +#endif + size_t plen = key->payload_length; + + if (plen && len!=(plen+MD5_DIGEST_LENGTH)) return 0; + + if (ctx->encrypt) { + if (plen==0) plen = len; +#if defined(STITCHED_CALL) + /* cipher has to "fall behind" */ + if (rc4_off>md5_off) md5_off+=MD5_CBLOCK; + + if (plen>md5_off && (blocks=(plen-md5_off)/MD5_CBLOCK)) { + MD5_Update(&key->md,in,md5_off); + RC4(&key->ks,rc4_off,in,out); + + rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off, + &key->md,in+md5_off,blocks); + blocks *= MD5_CBLOCK; + rc4_off += blocks; + md5_off += blocks; + key->md.Nh += blocks>>29; + key->md.Nl += blocks<<=3; + if (key->md.Nl<(unsigned int)blocks) key->md.Nh++; + } else { + rc4_off = 0; + md5_off = 0; + } +#endif + MD5_Update(&key->md,in+md5_off,plen-md5_off); + + if (plen!=len) { /* "TLS" mode of operation */ + if (in!=out) + memcpy(out+rc4_off,in+rc4_off,plen-rc4_off); + + /* calculate HMAC and append it to payload */ + MD5_Final(out+plen,&key->md); + key->md = key->tail; + MD5_Update(&key->md,out+plen,MD5_DIGEST_LENGTH); + MD5_Final(out+plen,&key->md); + /* encrypt HMAC at once */ + RC4(&key->ks,len-rc4_off,out+rc4_off,out+rc4_off); + } else { + RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off); + } + } else { + unsigned char mac[MD5_DIGEST_LENGTH]; +#if defined(STITCHED_CALL) + /* digest has to "fall behind" */ + if (md5_off>rc4_off) rc4_off += 2*MD5_CBLOCK; + else rc4_off += MD5_CBLOCK; + + if (len>rc4_off && (blocks=(len-rc4_off)/MD5_CBLOCK)) { + RC4(&key->ks,rc4_off,in,out); + MD5_Update(&key->md,out,md5_off); + + rc4_md5_enc(&key->ks,in+rc4_off,out+rc4_off, + &key->md,out+md5_off,blocks); + blocks *= MD5_CBLOCK; + rc4_off += blocks; + md5_off += blocks; + l = (key->md.Nl+(blocks<<3))&0xffffffffU; + if (l<key->md.Nl) key->md.Nh++; + key->md.Nl = l; + key->md.Nh += blocks>>29; + } else { + md5_off=0; + rc4_off=0; + } +#endif + /* decrypt HMAC at once */ + RC4(&key->ks,len-rc4_off,in+rc4_off,out+rc4_off); + if (plen) { /* "TLS" mode of operation */ + MD5_Update(&key->md,out+md5_off,plen-md5_off); + + /* calculate HMAC and verify it */ + MD5_Final(mac,&key->md); + key->md = key->tail; + MD5_Update(&key->md,mac,MD5_DIGEST_LENGTH); + MD5_Final(mac,&key->md); + + if (memcmp(out+plen,mac,MD5_DIGEST_LENGTH)) + return 0; + } else { + MD5_Update(&key->md,out+md5_off,len-md5_off); + } + } + + key->payload_length = 0; + + return 1; + } + +static int rc4_hmac_md5_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg, void *ptr) + { + EVP_RC4_HMAC_MD5 *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)) { + MD5_Init(&key->head); + MD5_Update(&key->head,ptr,arg); + MD5_Final(hmac_key,&key->head); + } else { + memcpy(hmac_key,ptr,arg); + } + + for (i=0;i<sizeof(hmac_key);i++) + hmac_key[i] ^= 0x36; /* ipad */ + MD5_Init(&key->head); + MD5_Update(&key->head,hmac_key,sizeof(hmac_key)); + + for (i=0;i<sizeof(hmac_key);i++) + hmac_key[i] ^= 0x36^0x5c; /* opad */ + MD5_Init(&key->tail); + MD5_Update(&key->tail,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) + { + len -= MD5_DIGEST_LENGTH; + p[arg-2] = len>>8; + p[arg-1] = len; + } + key->payload_length=len; + key->md = key->head; + MD5_Update(&key->md,p,arg); + + return MD5_DIGEST_LENGTH; + } + default: + return -1; + } + } + +static EVP_CIPHER r4_hmac_md5_cipher= + { +#ifdef NID_rc4_hmac_md5 + NID_rc4_hmac_md5, +#else + NID_undef, +#endif + 1,EVP_RC4_KEY_SIZE,0, + EVP_CIPH_STREAM_CIPHER|EVP_CIPH_VARIABLE_LENGTH|EVP_CIPH_FLAG_AEAD_CIPHER, + rc4_hmac_md5_init_key, + rc4_hmac_md5_cipher, + NULL, + sizeof(EVP_RC4_HMAC_MD5), + NULL, + NULL, + rc4_hmac_md5_ctrl, + NULL + }; + +const EVP_CIPHER *EVP_rc4_hmac_md5(void) + { + return(&r4_hmac_md5_cipher); + } +#endif |