michael@0: /*
michael@0:  * aes_icm.c
michael@0:  *
michael@0:  * AES Integer Counter Mode
michael@0:  *
michael@0:  * David A. McGrew
michael@0:  * Cisco Systems, Inc.
michael@0:  */
michael@0: 
michael@0: /*
michael@0:  *	
michael@0:  * Copyright (c) 2001-2006, Cisco Systems, Inc.
michael@0:  * All rights reserved.
michael@0:  * 
michael@0:  * Redistribution and use in source and binary forms, with or without
michael@0:  * modification, are permitted provided that the following conditions
michael@0:  * are met:
michael@0:  * 
michael@0:  *   Redistributions of source code must retain the above copyright
michael@0:  *   notice, this list of conditions and the following disclaimer.
michael@0:  * 
michael@0:  *   Redistributions in binary form must reproduce the above
michael@0:  *   copyright notice, this list of conditions and the following
michael@0:  *   disclaimer in the documentation and/or other materials provided
michael@0:  *   with the distribution.
michael@0:  * 
michael@0:  *   Neither the name of the Cisco Systems, Inc. nor the names of its
michael@0:  *   contributors may be used to endorse or promote products derived
michael@0:  *   from this software without specific prior written permission.
michael@0:  * 
michael@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0:  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
michael@0:  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
michael@0:  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
michael@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
michael@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
michael@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
michael@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
michael@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
michael@0:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
michael@0:  * OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0:  *
michael@0:  */
michael@0: 
michael@0: 
michael@0: #define ALIGN_32 0
michael@0: 
michael@0: #include "aes_icm.h"
michael@0: #include "alloc.h"
michael@0: 
michael@0: 
michael@0: debug_module_t mod_aes_icm = {
michael@0:   0,                 /* debugging is off by default */
michael@0:   "aes icm"          /* printable module name       */
michael@0: };
michael@0: 
michael@0: /*
michael@0:  * integer counter mode works as follows:
michael@0:  *
michael@0:  * 16 bits
michael@0:  * <----->
michael@0:  * +------+------+------+------+------+------+------+------+ 
michael@0:  * |           nonce           |    pakcet index    |  ctr |---+
michael@0:  * +------+------+------+------+------+------+------+------+   |
michael@0:  *                                                             |
michael@0:  * +------+------+------+------+------+------+------+------+   v
michael@0:  * |                      salt                      |000000|->(+)
michael@0:  * +------+------+------+------+------+------+------+------+   |
michael@0:  *                                                             |
michael@0:  *                                                        +---------+
michael@0:  *							  | encrypt |
michael@0:  *							  +---------+
michael@0:  *							       | 
michael@0:  * +------+------+------+------+------+------+------+------+   |
michael@0:  * |                    keystream block                    |<--+ 
michael@0:  * +------+------+------+------+------+------+------+------+   
michael@0:  *
michael@0:  * All fields are big-endian
michael@0:  *
michael@0:  * ctr is the block counter, which increments from zero for
michael@0:  * each packet (16 bits wide)
michael@0:  * 
michael@0:  * packet index is distinct for each packet (48 bits wide)
michael@0:  *
michael@0:  * nonce can be distinct across many uses of the same key, or
michael@0:  * can be a fixed value per key, or can be per-packet randomness
michael@0:  * (64 bits)
michael@0:  *
michael@0:  */
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_alloc_ismacryp(cipher_t **c, int key_len, int forIsmacryp) {
michael@0:   extern cipher_type_t aes_icm;
michael@0:   uint8_t *pointer;
michael@0:   int tmp;
michael@0: 
michael@0:   debug_print(mod_aes_icm, 
michael@0:             "allocating cipher with key length %d", key_len);
michael@0: 
michael@0:   /*
michael@0:    * Ismacryp, for example, uses 16 byte key + 8 byte 
michael@0:    * salt  so this function is called with key_len = 24.
michael@0:    * The check for key_len = 30/38/46 does not apply. Our usage
michael@0:    * of aes functions with key_len = values other than 30
michael@0:    * has not broken anything. Don't know what would be the
michael@0:    * effect of skipping this check for srtp in general.
michael@0:    */
michael@0:   if (!(forIsmacryp && key_len > 16 && key_len < 30) &&
michael@0:       key_len != 30 && key_len != 38 && key_len != 46)
michael@0:     return err_status_bad_param;
michael@0: 
michael@0:   /* allocate memory a cipher of type aes_icm */
michael@0:   tmp = (sizeof(aes_icm_ctx_t) + sizeof(cipher_t));
michael@0:   pointer = (uint8_t*)crypto_alloc(tmp);
michael@0:   if (pointer == NULL) 
michael@0:     return err_status_alloc_fail;
michael@0: 
michael@0:   /* set pointers */
michael@0:   *c = (cipher_t *)pointer;
michael@0:   (*c)->type = &aes_icm;
michael@0:   (*c)->state = pointer + sizeof(cipher_t);
michael@0: 
michael@0:   /* increment ref_count */
michael@0:   aes_icm.ref_count++;
michael@0: 
michael@0:   /* set key size        */
michael@0:   (*c)->key_len = key_len;
michael@0: 
michael@0:   return err_status_ok;  
michael@0: }
michael@0: 
michael@0: err_status_t aes_icm_alloc(cipher_t **c, int key_len, int forIsmacryp) {
michael@0:   return aes_icm_alloc_ismacryp(c, key_len, 0);
michael@0: }
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_dealloc(cipher_t *c) {
michael@0:   extern cipher_type_t aes_icm;
michael@0: 
michael@0:   /* zeroize entire state*/
michael@0:   octet_string_set_to_zero((uint8_t *)c, 
michael@0: 			   sizeof(aes_icm_ctx_t) + sizeof(cipher_t));
michael@0: 
michael@0:   /* free memory */
michael@0:   crypto_free(c);
michael@0: 
michael@0:   /* decrement ref_count */
michael@0:   aes_icm.ref_count--;
michael@0:   
michael@0:   return err_status_ok;  
michael@0: }
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * aes_icm_context_init(...) initializes the aes_icm_context
michael@0:  * using the value in key[].
michael@0:  *
michael@0:  * the key is the secret key 
michael@0:  *
michael@0:  * the salt is unpredictable (but not necessarily secret) data which
michael@0:  * randomizes the starting point in the keystream
michael@0:  */
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_context_init(aes_icm_ctx_t *c, const uint8_t *key, int key_len) {
michael@0:   err_status_t status;
michael@0:   int base_key_len, copy_len;
michael@0: 
michael@0:   if (key_len > 16 && key_len < 30) /* Ismacryp */
michael@0:     base_key_len = 16;
michael@0:   else if (key_len == 30 || key_len == 38 || key_len == 46)
michael@0:     base_key_len = key_len - 14;
michael@0:   else
michael@0:     return err_status_bad_param;
michael@0: 
michael@0:   /*
michael@0:    * set counter and initial values to 'offset' value, being careful not to
michael@0:    * go past the end of the key buffer
michael@0:    */
michael@0:   v128_set_to_zero(&c->counter);
michael@0:   v128_set_to_zero(&c->offset);
michael@0: 
michael@0:   copy_len = key_len - base_key_len;
michael@0:   /* force last two octets of the offset to be left zero (for srtp compatibility) */
michael@0:   if (copy_len > 14)
michael@0:     copy_len = 14;
michael@0: 
michael@0:   memcpy(&c->counter, key + base_key_len, copy_len);
michael@0:   memcpy(&c->offset, key + base_key_len, copy_len);
michael@0: 
michael@0:   debug_print(mod_aes_icm, 
michael@0: 	      "key:  %s", octet_string_hex_string(key, base_key_len)); 
michael@0:   debug_print(mod_aes_icm, 
michael@0: 	      "offset: %s", v128_hex_string(&c->offset)); 
michael@0: 
michael@0:   /* expand key */
michael@0:   status = aes_expand_encryption_key(key, base_key_len, &c->expanded_key);
michael@0:   if (status) {
michael@0:     v128_set_to_zero(&c->counter);
michael@0:     v128_set_to_zero(&c->offset);
michael@0:     return status;
michael@0:   }
michael@0: 
michael@0:   /* indicate that the keystream_buffer is empty */
michael@0:   c->bytes_in_buffer = 0;
michael@0: 
michael@0:   return err_status_ok;
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * aes_icm_set_octet(c, i) sets the counter of the context which it is
michael@0:  * passed so that the next octet of keystream that will be generated
michael@0:  * is the ith octet
michael@0:  */
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_set_octet(aes_icm_ctx_t *c,
michael@0: 		  uint64_t octet_num) {
michael@0: 
michael@0: #ifdef NO_64BIT_MATH
michael@0:   int tail_num       = low32(octet_num) & 0x0f;
michael@0:   /* 64-bit right-shift 4 */
michael@0:   uint64_t block_num = make64(high32(octet_num) >> 4,
michael@0: 							  ((high32(octet_num) & 0x0f)<<(32-4)) |
michael@0: 							   (low32(octet_num) >> 4));
michael@0: #else
michael@0:   int tail_num       = (int)(octet_num % 16);
michael@0:   uint64_t block_num = octet_num / 16;
michael@0: #endif
michael@0:   
michael@0: 
michael@0:   /* set counter value */
michael@0:   /* FIX - There's no way this is correct */
michael@0:   c->counter.v64[0] = c->offset.v64[0];
michael@0: #ifdef NO_64BIT_MATH
michael@0:   c->counter.v64[0] = make64(high32(c->offset.v64[0]) ^ high32(block_num),
michael@0: 							 low32(c->offset.v64[0])  ^ low32(block_num));
michael@0: #else
michael@0:   c->counter.v64[0] = c->offset.v64[0] ^ block_num;
michael@0: #endif
michael@0: 
michael@0:   debug_print(mod_aes_icm, 
michael@0: 	      "set_octet: %s", v128_hex_string(&c->counter)); 
michael@0: 
michael@0:   /* fill keystream buffer, if needed */
michael@0:   if (tail_num) {
michael@0:     v128_copy(&c->keystream_buffer, &c->counter);
michael@0:     aes_encrypt(&c->keystream_buffer, &c->expanded_key);
michael@0:     c->bytes_in_buffer = sizeof(v128_t);
michael@0: 
michael@0:     debug_print(mod_aes_icm, "counter:    %s", 
michael@0: 	      v128_hex_string(&c->counter));
michael@0:     debug_print(mod_aes_icm, "ciphertext: %s", 
michael@0: 	      v128_hex_string(&c->keystream_buffer));    
michael@0:     
michael@0:     /*  indicate number of bytes in keystream_buffer  */
michael@0:     c->bytes_in_buffer = sizeof(v128_t) - tail_num;
michael@0:   
michael@0:   } else {
michael@0:     
michael@0:     /* indicate that keystream_buffer is empty */
michael@0:     c->bytes_in_buffer = 0;
michael@0:   }
michael@0: 
michael@0:   return err_status_ok;
michael@0: }
michael@0: 
michael@0: /*
michael@0:  * aes_icm_set_iv(c, iv) sets the counter value to the exor of iv with
michael@0:  * the offset
michael@0:  */
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_set_iv(aes_icm_ctx_t *c, void *iv) {
michael@0:   v128_t *nonce = (v128_t *) iv;
michael@0: 
michael@0:   debug_print(mod_aes_icm, 
michael@0: 	      "setting iv: %s", v128_hex_string(nonce)); 
michael@0:  
michael@0:   v128_xor(&c->counter, &c->offset, nonce);
michael@0:   
michael@0:   debug_print(mod_aes_icm, 
michael@0: 	      "set_counter: %s", v128_hex_string(&c->counter)); 
michael@0: 
michael@0:   /* indicate that the keystream_buffer is empty */
michael@0:   c->bytes_in_buffer = 0;
michael@0: 
michael@0:   return err_status_ok;
michael@0: }
michael@0: 
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * aes_icm_advance(...) refills the keystream_buffer and
michael@0:  * advances the block index of the sicm_context forward by one
michael@0:  *
michael@0:  * this is an internal, hopefully inlined function
michael@0:  */
michael@0:   
michael@0: static inline void
michael@0: aes_icm_advance_ismacryp(aes_icm_ctx_t *c, uint8_t forIsmacryp) {
michael@0:   /* fill buffer with new keystream */
michael@0:   v128_copy(&c->keystream_buffer, &c->counter);
michael@0:   aes_encrypt(&c->keystream_buffer, &c->expanded_key);
michael@0:   c->bytes_in_buffer = sizeof(v128_t);
michael@0: 
michael@0:   debug_print(mod_aes_icm, "counter:    %s", 
michael@0: 	      v128_hex_string(&c->counter));
michael@0:   debug_print(mod_aes_icm, "ciphertext: %s", 
michael@0: 	      v128_hex_string(&c->keystream_buffer));    
michael@0:   
michael@0:   /* clock counter forward */
michael@0: 
michael@0:   if (forIsmacryp) {
michael@0:     uint32_t temp;    
michael@0:     //alex's clock counter forward
michael@0:     temp = ntohl(c->counter.v32[3]);
michael@0:     c->counter.v32[3] = htonl(++temp);
michael@0:   } else {
michael@0:     if (!++(c->counter.v8[15])) 
michael@0:       ++(c->counter.v8[14]);
michael@0:   }
michael@0: }
michael@0: 
michael@0: static inline void aes_icm_advance(aes_icm_ctx_t *c) {
michael@0:   aes_icm_advance_ismacryp(c, 0);
michael@0: }
michael@0: 
michael@0: 
michael@0: /*e
michael@0:  * icm_encrypt deals with the following cases:
michael@0:  *
michael@0:  * bytes_to_encr < bytes_in_buffer
michael@0:  *  - add keystream into data
michael@0:  *
michael@0:  * bytes_to_encr > bytes_in_buffer
michael@0:  *  - add keystream into data until keystream_buffer is depleted
michael@0:  *  - loop over blocks, filling keystream_buffer and then
michael@0:  *    adding keystream into data
michael@0:  *  - fill buffer then add in remaining (< 16) bytes of keystream 
michael@0:  */
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_encrypt_ismacryp(aes_icm_ctx_t *c,
michael@0:               unsigned char *buf, unsigned int *enc_len, 
michael@0:               int forIsmacryp) {
michael@0:   unsigned int bytes_to_encr = *enc_len;
michael@0:   unsigned int i;
michael@0:   uint32_t *b;
michael@0: 
michael@0:   /* check that there's enough segment left but not for ismacryp*/
michael@0:   if (!forIsmacryp && (bytes_to_encr + htons(c->counter.v16[7])) > 0xffff)
michael@0:     return err_status_terminus;
michael@0: 
michael@0:  debug_print(mod_aes_icm, "block index: %d", 
michael@0:            htons(c->counter.v16[7]));
michael@0:   if (bytes_to_encr <= (unsigned int)c->bytes_in_buffer) {
michael@0:     
michael@0:     /* deal with odd case of small bytes_to_encr */
michael@0:     for (i = (sizeof(v128_t) - c->bytes_in_buffer);
michael@0: 		 i < (sizeof(v128_t) - c->bytes_in_buffer + bytes_to_encr); i++) 
michael@0: 	{
michael@0:       *buf++ ^= c->keystream_buffer.v8[i];
michael@0: 	}
michael@0: 
michael@0:     c->bytes_in_buffer -= bytes_to_encr;
michael@0: 
michael@0:     /* return now to avoid the main loop */
michael@0:     return err_status_ok;
michael@0: 
michael@0:   } else {
michael@0:     
michael@0:     /* encrypt bytes until the remaining data is 16-byte aligned */    
michael@0:     for (i=(sizeof(v128_t) - c->bytes_in_buffer); i < sizeof(v128_t); i++) 
michael@0:       *buf++ ^= c->keystream_buffer.v8[i];
michael@0: 
michael@0:     bytes_to_encr -= c->bytes_in_buffer;
michael@0:     c->bytes_in_buffer = 0;
michael@0: 
michael@0:   }
michael@0:   
michael@0:   /* now loop over entire 16-byte blocks of keystream */
michael@0:   for (i=0; i < (bytes_to_encr/sizeof(v128_t)); i++) {
michael@0: 
michael@0:     /* fill buffer with new keystream */
michael@0:     aes_icm_advance_ismacryp(c, forIsmacryp);
michael@0: 
michael@0:     /*
michael@0:      * add keystream into the data buffer (this would be a lot faster
michael@0:      * if we could assume 32-bit alignment!)
michael@0:      */
michael@0: 
michael@0: #if ALIGN_32
michael@0:     b = (uint32_t *)buf;
michael@0:     *b++ ^= c->keystream_buffer.v32[0];
michael@0:     *b++ ^= c->keystream_buffer.v32[1];
michael@0:     *b++ ^= c->keystream_buffer.v32[2];
michael@0:     *b++ ^= c->keystream_buffer.v32[3];
michael@0:     buf = (uint8_t *)b;
michael@0: #else    
michael@0:     if ((((unsigned long) buf) & 0x03) != 0) {
michael@0:       *buf++ ^= c->keystream_buffer.v8[0];
michael@0:       *buf++ ^= c->keystream_buffer.v8[1];
michael@0:       *buf++ ^= c->keystream_buffer.v8[2];
michael@0:       *buf++ ^= c->keystream_buffer.v8[3];
michael@0:       *buf++ ^= c->keystream_buffer.v8[4];
michael@0:       *buf++ ^= c->keystream_buffer.v8[5];
michael@0:       *buf++ ^= c->keystream_buffer.v8[6];
michael@0:       *buf++ ^= c->keystream_buffer.v8[7];
michael@0:       *buf++ ^= c->keystream_buffer.v8[8];
michael@0:       *buf++ ^= c->keystream_buffer.v8[9];
michael@0:       *buf++ ^= c->keystream_buffer.v8[10];
michael@0:       *buf++ ^= c->keystream_buffer.v8[11];
michael@0:       *buf++ ^= c->keystream_buffer.v8[12];
michael@0:       *buf++ ^= c->keystream_buffer.v8[13];
michael@0:       *buf++ ^= c->keystream_buffer.v8[14];
michael@0:       *buf++ ^= c->keystream_buffer.v8[15];
michael@0:     } else {
michael@0:       b = (uint32_t *)buf;
michael@0:       *b++ ^= c->keystream_buffer.v32[0];
michael@0:       *b++ ^= c->keystream_buffer.v32[1];
michael@0:       *b++ ^= c->keystream_buffer.v32[2];
michael@0:       *b++ ^= c->keystream_buffer.v32[3];
michael@0:       buf = (uint8_t *)b;
michael@0:     }
michael@0: #endif /* #if ALIGN_32 */
michael@0: 
michael@0:   }
michael@0:   
michael@0:   /* if there is a tail end of the data, process it */
michael@0:   if ((bytes_to_encr & 0xf) != 0) {
michael@0:     
michael@0:     /* fill buffer with new keystream */
michael@0:     aes_icm_advance_ismacryp(c, forIsmacryp);
michael@0:     
michael@0:     for (i=0; i < (bytes_to_encr & 0xf); i++)
michael@0:       *buf++ ^= c->keystream_buffer.v8[i];
michael@0:     
michael@0:     /* reset the keystream buffer size to right value */
michael@0:     c->bytes_in_buffer = sizeof(v128_t) - i;  
michael@0:   } else {
michael@0: 
michael@0:     /* no tail, so just reset the keystream buffer size to zero */
michael@0:     c->bytes_in_buffer = 0;
michael@0: 
michael@0:   }
michael@0: 
michael@0:   return err_status_ok;
michael@0: }
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_encrypt(aes_icm_ctx_t *c, unsigned char *buf, unsigned int *enc_len) {
michael@0:   return aes_icm_encrypt_ismacryp(c, buf, enc_len, 0);
michael@0: }
michael@0: 
michael@0: err_status_t
michael@0: aes_icm_output(aes_icm_ctx_t *c, uint8_t *buffer, int num_octets_to_output) {
michael@0:   unsigned int len = num_octets_to_output;
michael@0:   
michael@0:   /* zeroize the buffer */
michael@0:   octet_string_set_to_zero(buffer, num_octets_to_output);
michael@0:   
michael@0:   /* exor keystream into buffer */
michael@0:   return aes_icm_encrypt(c, buffer, &len);
michael@0: }
michael@0: 
michael@0: 
michael@0: char 
michael@0: aes_icm_description[] = "aes integer counter mode";
michael@0: 
michael@0: uint8_t aes_icm_test_case_0_key[30] = {
michael@0:   0x2b, 0x7e, 0x15, 0x16, 0x28, 0xae, 0xd2, 0xa6,
michael@0:   0xab, 0xf7, 0x15, 0x88, 0x09, 0xcf, 0x4f, 0x3c,
michael@0:   0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
michael@0:   0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_0_nonce[16] = {
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_0_plaintext[32] =  {
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_0_ciphertext[32] = {
michael@0:   0xe0, 0x3e, 0xad, 0x09, 0x35, 0xc9, 0x5e, 0x80,
michael@0:   0xe1, 0x66, 0xb1, 0x6d, 0xd9, 0x2b, 0x4e, 0xb4,
michael@0:   0xd2, 0x35, 0x13, 0x16, 0x2b, 0x02, 0xd0, 0xf7,
michael@0:   0x2a, 0x43, 0xa2, 0xfe, 0x4a, 0x5f, 0x97, 0xab
michael@0: };
michael@0: 
michael@0: cipher_test_case_t aes_icm_test_case_0 = {
michael@0:   30,                                    /* octets in key            */
michael@0:   aes_icm_test_case_0_key,               /* key                      */
michael@0:   aes_icm_test_case_0_nonce,             /* packet index             */
michael@0:   32,                                    /* octets in plaintext      */
michael@0:   aes_icm_test_case_0_plaintext,         /* plaintext                */
michael@0:   32,                                    /* octets in ciphertext     */
michael@0:   aes_icm_test_case_0_ciphertext,        /* ciphertext               */
michael@0:   NULL                                   /* pointer to next testcase */
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_1_key[46] = {
michael@0:   0x57, 0xf8, 0x2f, 0xe3, 0x61, 0x3f, 0xd1, 0x70,
michael@0:   0xa8, 0x5e, 0xc9, 0x3c, 0x40, 0xb1, 0xf0, 0x92,
michael@0:   0x2e, 0xc4, 0xcb, 0x0d, 0xc0, 0x25, 0xb5, 0x82,
michael@0:   0x72, 0x14, 0x7c, 0xc4, 0x38, 0x94, 0x4a, 0x98,
michael@0:   0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
michael@0:   0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_1_nonce[16] = {
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_1_plaintext[32] =  {
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0:   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
michael@0: };
michael@0: 
michael@0: uint8_t aes_icm_test_case_1_ciphertext[32] = {
michael@0:   0x92, 0xbd, 0xd2, 0x8a, 0x93, 0xc3, 0xf5, 0x25,
michael@0:   0x11, 0xc6, 0x77, 0xd0, 0x8b, 0x55, 0x15, 0xa4,
michael@0:   0x9d, 0xa7, 0x1b, 0x23, 0x78, 0xa8, 0x54, 0xf6,
michael@0:   0x70, 0x50, 0x75, 0x6d, 0xed, 0x16, 0x5b, 0xac
michael@0: };
michael@0: 
michael@0: cipher_test_case_t aes_icm_test_case_1 = {
michael@0:   46,                                    /* octets in key            */
michael@0:   aes_icm_test_case_1_key,               /* key                      */
michael@0:   aes_icm_test_case_1_nonce,             /* packet index             */
michael@0:   32,                                    /* octets in plaintext      */
michael@0:   aes_icm_test_case_1_plaintext,         /* plaintext                */
michael@0:   32,                                    /* octets in ciphertext     */
michael@0:   aes_icm_test_case_1_ciphertext,        /* ciphertext               */
michael@0:   &aes_icm_test_case_0                   /* pointer to next testcase */
michael@0: };
michael@0: 
michael@0: 
michael@0: 
michael@0: /*
michael@0:  * note: the encrypt function is identical to the decrypt function
michael@0:  */
michael@0: 
michael@0: cipher_type_t aes_icm = {
michael@0:   (cipher_alloc_func_t)          aes_icm_alloc,
michael@0:   (cipher_dealloc_func_t)        aes_icm_dealloc,  
michael@0:   (cipher_init_func_t)           aes_icm_context_init,
michael@0:   (cipher_encrypt_func_t)        aes_icm_encrypt,
michael@0:   (cipher_decrypt_func_t)        aes_icm_encrypt,
michael@0:   (cipher_set_iv_func_t)         aes_icm_set_iv,
michael@0:   (char *)                       aes_icm_description,
michael@0:   (int)                          0,   /* instance count */
michael@0:   (cipher_test_case_t *)        &aes_icm_test_case_1,
michael@0:   (debug_module_t *)            &mod_aes_icm,
michael@0:   (cipher_type_id_t)             AES_ICM
michael@0: };
michael@0: