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view libtomcrypt/src/modes/xts/xts_test.c @ 1857:6022df862942

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Use DSCP for IP QoS traffic classes The previous TOS values are deprecated and not used by modern traffic classifiers. This sets AF21 for "interactive" traffic (with a tty). Non-tty traffic sets AF11 - that indicates high throughput but is not lowest priority (which would be CS1 or LE). This differs from the CS1 used by OpenSSH, it lets interactive git over SSH have higher priority than background least effort traffic. Dropbear's settings here should be suitable with the diffservs used by CAKE qdisc.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 25 Jan 2022 17:32:20 +0800
parents 6dba84798cd5
children
line wrap: on
line source

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 */
#include "tomcrypt.h"

#ifdef LTC_XTS_MODE

#ifndef LTC_NO_TEST
static int _xts_test_accel_xts_encrypt(const unsigned char *pt, unsigned char *ct, unsigned long blocks,
                                       unsigned char *tweak, symmetric_key *skey1, symmetric_key *skey2)
{
   int ret;
   symmetric_xts xts;
   int (*orig)(const unsigned char *, unsigned char *,
               unsigned long , unsigned char *, symmetric_key *,
               symmetric_key *);

   /* AES can be under rijndael or aes... try to find it */
   if ((xts.cipher = find_cipher("aes")) == -1) {
      if ((xts.cipher = find_cipher("rijndael")) == -1) {
         return CRYPT_NOP;
      }
   }
   orig = cipher_descriptor[xts.cipher].accel_xts_encrypt;
   cipher_descriptor[xts.cipher].accel_xts_encrypt = NULL;

   XMEMCPY(&xts.key1, skey1, sizeof(symmetric_key));
   XMEMCPY(&xts.key2, skey2, sizeof(symmetric_key));

   ret = xts_encrypt(pt, blocks << 4, ct, tweak, &xts);
   cipher_descriptor[xts.cipher].accel_xts_encrypt = orig;

   return ret;
}

static int _xts_test_accel_xts_decrypt(const unsigned char *ct, unsigned char *pt, unsigned long blocks,
                                       unsigned char *tweak, symmetric_key *skey1, symmetric_key *skey2)
{
   int ret;
   symmetric_xts xts;
   int (*orig)(const unsigned char *, unsigned char *,
               unsigned long , unsigned char *, symmetric_key *,
               symmetric_key *);

   /* AES can be under rijndael or aes... try to find it */
   if ((xts.cipher = find_cipher("aes")) == -1) {
      if ((xts.cipher = find_cipher("rijndael")) == -1) {
         return CRYPT_NOP;
      }
   }
   orig = cipher_descriptor[xts.cipher].accel_xts_decrypt;
   cipher_descriptor[xts.cipher].accel_xts_decrypt = NULL;

   XMEMCPY(&xts.key1, skey1, sizeof(symmetric_key));
   XMEMCPY(&xts.key2, skey2, sizeof(symmetric_key));

   ret = xts_decrypt(ct, blocks << 4, pt, tweak, &xts);
   cipher_descriptor[xts.cipher].accel_xts_decrypt = orig;

   return ret;
}
#endif

/**
  Source donated by Elliptic Semiconductor Inc (www.ellipticsemi.com) to the LibTom Projects

  Returns CRYPT_OK upon success.
*/
int xts_test(void)
{
#ifdef LTC_NO_TEST
   return CRYPT_NOP;
#else
   static const struct
   {
      int keylen;
      unsigned char key1[32];
      unsigned char key2[32];
      ulong64 seqnum;
      unsigned long PTLEN;
      unsigned char PTX[512], CTX[512];
   } tests[] = {

/* #1 32 byte key, 32 byte PTX */
{
   32,
   { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
   { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
   0,
   32,
   { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
   { 0x91,0x7c,0xf6,0x9e,0xbd,0x68,0xb2,0xec,0x9b,0x9f,0xe9,0xa3,0xea,0xdd,0xa6,0x92,0xcd,0x43,0xd2,0xf5,0x95,0x98,0xed,0x85,0x8c,0x02,0xc2,0x65,0x2f,0xbf,0x92,0x2e },
},

/* #2, 32 byte key, 32 byte PTX */
{
   32,
   { 0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11,0x11 },
   { 0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22,0x22 },
   CONST64(0x3333333333),
   32,
   { 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44 },
   { 0xc4,0x54,0x18,0x5e,0x6a,0x16,0x93,0x6e,0x39,0x33,0x40,0x38,0xac,0xef,0x83,0x8b,0xfb,0x18,0x6f,0xff,0x74,0x80,0xad,0xc4,0x28,0x93,0x82,0xec,0xd6,0xd3,0x94,0xf0 },
},

/* #5 from xts.7, 32 byte key, 32 byte PTX */
{
   32,
   { 0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0 },
   { 0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0 },
   CONST64(0x123456789a),
   32,
   { 0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44,0x44 },
   { 0xb0,0x1f,0x86,0xf8,0xed,0xc1,0x86,0x37,0x06,0xfa,0x8a,0x42,0x53,0xe3,0x4f,0x28,0xaf,0x31,0x9d,0xe3,0x83,0x34,0x87,0x0f,0x4d,0xd1,0xf9,0x4c,0xbe,0x98,0x32,0xf1 },
},

/* #4, 32 byte key, 512 byte PTX  */
{
   32,
   { 0x27,0x18,0x28,0x18,0x28,0x45,0x90,0x45,0x23,0x53,0x60,0x28,0x74,0x71,0x35,0x26 },
   { 0x31,0x41,0x59,0x26,0x53,0x58,0x97,0x93,0x23,0x84,0x62,0x64,0x33,0x83,0x27,0x95 },
   0,
   512,
   {
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff,
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e,0x1f,
0x20,0x21,0x22,0x23,0x24,0x25,0x26,0x27,0x28,0x29,0x2a,0x2b,0x2c,0x2d,0x2e,0x2f,0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x3b,0x3c,0x3d,0x3e,0x3f,
0x40,0x41,0x42,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x4b,0x4c,0x4d,0x4e,0x4f,0x50,0x51,0x52,0x53,0x54,0x55,0x56,0x57,0x58,0x59,0x5a,0x5b,0x5c,0x5d,0x5e,0x5f,
0x60,0x61,0x62,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x6b,0x6c,0x6d,0x6e,0x6f,0x70,0x71,0x72,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x7b,0x7c,0x7d,0x7e,0x7f,
0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8a,0x8b,0x8c,0x8d,0x8e,0x8f,0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0x9b,0x9c,0x9d,0x9e,0x9f,
0xa0,0xa1,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xab,0xac,0xad,0xae,0xaf,0xb0,0xb1,0xb2,0xb3,0xb4,0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xbb,0xbc,0xbd,0xbe,0xbf,
0xc0,0xc1,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xcb,0xcc,0xcd,0xce,0xcf,0xd0,0xd1,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xdb,0xdc,0xdd,0xde,0xdf,
0xe0,0xe1,0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xeb,0xec,0xed,0xee,0xef,0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff,
   },
   {
0x27,0xa7,0x47,0x9b,0xef,0xa1,0xd4,0x76,0x48,0x9f,0x30,0x8c,0xd4,0xcf,0xa6,0xe2,0xa9,0x6e,0x4b,0xbe,0x32,0x08,0xff,0x25,0x28,0x7d,0xd3,0x81,0x96,0x16,0xe8,0x9c,
0xc7,0x8c,0xf7,0xf5,0xe5,0x43,0x44,0x5f,0x83,0x33,0xd8,0xfa,0x7f,0x56,0x00,0x00,0x05,0x27,0x9f,0xa5,0xd8,0xb5,0xe4,0xad,0x40,0xe7,0x36,0xdd,0xb4,0xd3,0x54,0x12,
0x32,0x80,0x63,0xfd,0x2a,0xab,0x53,0xe5,0xea,0x1e,0x0a,0x9f,0x33,0x25,0x00,0xa5,0xdf,0x94,0x87,0xd0,0x7a,0x5c,0x92,0xcc,0x51,0x2c,0x88,0x66,0xc7,0xe8,0x60,0xce,
0x93,0xfd,0xf1,0x66,0xa2,0x49,0x12,0xb4,0x22,0x97,0x61,0x46,0xae,0x20,0xce,0x84,0x6b,0xb7,0xdc,0x9b,0xa9,0x4a,0x76,0x7a,0xae,0xf2,0x0c,0x0d,0x61,0xad,0x02,0x65,
0x5e,0xa9,0x2d,0xc4,0xc4,0xe4,0x1a,0x89,0x52,0xc6,0x51,0xd3,0x31,0x74,0xbe,0x51,0xa1,0x0c,0x42,0x11,0x10,0xe6,0xd8,0x15,0x88,0xed,0xe8,0x21,0x03,0xa2,0x52,0xd8,
0xa7,0x50,0xe8,0x76,0x8d,0xef,0xff,0xed,0x91,0x22,0x81,0x0a,0xae,0xb9,0x9f,0x91,0x72,0xaf,0x82,0xb6,0x04,0xdc,0x4b,0x8e,0x51,0xbc,0xb0,0x82,0x35,0xa6,0xf4,0x34,
0x13,0x32,0xe4,0xca,0x60,0x48,0x2a,0x4b,0xa1,0xa0,0x3b,0x3e,0x65,0x00,0x8f,0xc5,0xda,0x76,0xb7,0x0b,0xf1,0x69,0x0d,0xb4,0xea,0xe2,0x9c,0x5f,0x1b,0xad,0xd0,0x3c,
0x5c,0xcf,0x2a,0x55,0xd7,0x05,0xdd,0xcd,0x86,0xd4,0x49,0x51,0x1c,0xeb,0x7e,0xc3,0x0b,0xf1,0x2b,0x1f,0xa3,0x5b,0x91,0x3f,0x9f,0x74,0x7a,0x8a,0xfd,0x1b,0x13,0x0e,
0x94,0xbf,0xf9,0x4e,0xff,0xd0,0x1a,0x91,0x73,0x5c,0xa1,0x72,0x6a,0xcd,0x0b,0x19,0x7c,0x4e,0x5b,0x03,0x39,0x36,0x97,0xe1,0x26,0x82,0x6f,0xb6,0xbb,0xde,0x8e,0xcc,
0x1e,0x08,0x29,0x85,0x16,0xe2,0xc9,0xed,0x03,0xff,0x3c,0x1b,0x78,0x60,0xf6,0xde,0x76,0xd4,0xce,0xcd,0x94,0xc8,0x11,0x98,0x55,0xef,0x52,0x97,0xca,0x67,0xe9,0xf3,
0xe7,0xff,0x72,0xb1,0xe9,0x97,0x85,0xca,0x0a,0x7e,0x77,0x20,0xc5,0xb3,0x6d,0xc6,0xd7,0x2c,0xac,0x95,0x74,0xc8,0xcb,0xbc,0x2f,0x80,0x1e,0x23,0xe5,0x6f,0xd3,0x44,
0xb0,0x7f,0x22,0x15,0x4b,0xeb,0xa0,0xf0,0x8c,0xe8,0x89,0x1e,0x64,0x3e,0xd9,0x95,0xc9,0x4d,0x9a,0x69,0xc9,0xf1,0xb5,0xf4,0x99,0x02,0x7a,0x78,0x57,0x2a,0xee,0xbd,
0x74,0xd2,0x0c,0xc3,0x98,0x81,0xc2,0x13,0xee,0x77,0x0b,0x10,0x10,0xe4,0xbe,0xa7,0x18,0x84,0x69,0x77,0xae,0x11,0x9f,0x7a,0x02,0x3a,0xb5,0x8c,0xca,0x0a,0xd7,0x52,
0xaf,0xe6,0x56,0xbb,0x3c,0x17,0x25,0x6a,0x9f,0x6e,0x9b,0xf1,0x9f,0xdd,0x5a,0x38,0xfc,0x82,0xbb,0xe8,0x72,0xc5,0x53,0x9e,0xdb,0x60,0x9e,0xf4,0xf7,0x9c,0x20,0x3e,
0xbb,0x14,0x0f,0x2e,0x58,0x3c,0xb2,0xad,0x15,0xb4,0xaa,0x5b,0x65,0x50,0x16,0xa8,0x44,0x92,0x77,0xdb,0xd4,0x77,0xef,0x2c,0x8d,0x6c,0x01,0x7d,0xb7,0x38,0xb1,0x8d,
0xeb,0x4a,0x42,0x7d,0x19,0x23,0xce,0x3f,0xf2,0x62,0x73,0x57,0x79,0xa4,0x18,0xf2,0x0a,0x28,0x2d,0xf9,0x20,0x14,0x7b,0xea,0xbe,0x42,0x1e,0xe5,0x31,0x9d,0x05,0x68,
   }
},

/* #7, 32 byte key, 17 byte PTX */
{
   32,
   { 0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0 },
   { 0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0 },
   CONST64(0x123456789a),
   17,
   { 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10 },
   { 0x6c,0x16,0x25,0xdb,0x46,0x71,0x52,0x2d,0x3d,0x75,0x99,0x60,0x1d,0xe7,0xca,0x09,0xed },
},

/* #15, 32 byte key, 25 byte PTX */
{
   32,
   { 0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0 },
   { 0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0 },
   CONST64(0x123456789a),
   25,
   { 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18 },
   { 0x8f,0x4d,0xcb,0xad,0x55,0x55,0x8d,0x7b,0x4e,0x01,0xd9,0x37,0x9c,0xd4,0xea,0x22,0xed,0xbf,0x9d,0xac,0xe4,0x5d,0x6f,0x6a,0x73 },
},

/* #21, 32 byte key, 31 byte PTX */
{
   32,
   { 0xff,0xfe,0xfd,0xfc,0xfb,0xfa,0xf9,0xf8,0xf7,0xf6,0xf5,0xf4,0xf3,0xf2,0xf1,0xf0 },
   { 0xbf,0xbe,0xbd,0xbc,0xbb,0xba,0xb9,0xb8,0xb7,0xb6,0xb5,0xb4,0xb3,0xb2,0xb1,0xb0 },
   CONST64(0x123456789a),
   31,
   { 0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0x10,0x11,0x12,0x13,0x14,0x15,0x16,0x17,0x18,0x19,0x1a,0x1b,0x1c,0x1d,0x1e },
   { 0xd0,0x5b,0xc0,0x90,0xa8,0xe0,0x4f,0x1b,0x3d,0x3e,0xcd,0xd5,0xba,0xec,0x0f,0xd4,0xed,0xbf,0x9d,0xac,0xe4,0x5d,0x6f,0x6a,0x73,0x06,0xe6,0x4b,0xe5,0xdd,0x82 },
},

};
   unsigned char OUT[512], Torg[16], T[16];
   ulong64 seq;
   symmetric_xts xts;
   int i, j, k, err, idx;
   unsigned long len;

   /* AES can be under rijndael or aes... try to find it */
   if ((idx = find_cipher("aes")) == -1) {
      if ((idx = find_cipher("rijndael")) == -1) {
         return CRYPT_NOP;
      }
   }
   for (k = 0; k < 4; ++k) {
      cipher_descriptor[idx].accel_xts_encrypt = NULL;
      cipher_descriptor[idx].accel_xts_decrypt = NULL;
      if (k & 0x1) {
         cipher_descriptor[idx].accel_xts_encrypt = _xts_test_accel_xts_encrypt;
      }
      if (k & 0x2) {
         cipher_descriptor[idx].accel_xts_decrypt = _xts_test_accel_xts_decrypt;
      }
      for (j = 0; j < 2; j++) {
         for (i = 0; i < (int)(sizeof(tests) / sizeof(tests[0])); i++) {
            /* skip the cases where
             * the length is smaller than 2*blocklen
             * or the length is not a multiple of 32
             */
            if ((j == 1) && ((tests[i].PTLEN < 32) || (tests[i].PTLEN % 32))) {
               continue;
            }
            if ((k > 0) && (j == 1)) {
               continue;
            }
            len = tests[i].PTLEN / 2;

            err = xts_start(idx, tests[i].key1, tests[i].key2, tests[i].keylen / 2, 0, &xts);
            if (err != CRYPT_OK) {
               return err;
            }

            seq = tests[i].seqnum;
            STORE64L(seq, Torg);
            XMEMSET(Torg + 8, 0, 8);

            XMEMCPY(T, Torg, sizeof(T));
            if (j == 0) {
               err = xts_encrypt(tests[i].PTX, tests[i].PTLEN, OUT, T, &xts);
               if (err != CRYPT_OK) {
                  xts_done(&xts);
                  return err;
               }
            } else {
               err = xts_encrypt(tests[i].PTX, len, OUT, T, &xts);
               if (err != CRYPT_OK) {
                  xts_done(&xts);
                  return err;
               }
               err = xts_encrypt(&tests[i].PTX[len], len, &OUT[len], T, &xts);
               if (err != CRYPT_OK) {
                  xts_done(&xts);
                  return err;
               }
            }

            if (compare_testvector(OUT, tests[i].PTLEN, tests[i].CTX, tests[i].PTLEN, "XTS encrypt", i)) {
               xts_done(&xts);
               return CRYPT_FAIL_TESTVECTOR;
            }

            XMEMCPY(T, Torg, sizeof(T));
            if (j == 0) {
               err = xts_decrypt(tests[i].CTX, tests[i].PTLEN, OUT, T, &xts);
               if (err != CRYPT_OK) {
                  xts_done(&xts);
                  return err;
               }
            } else {
               err = xts_decrypt(tests[i].CTX, len, OUT, T, &xts);
               if (err != CRYPT_OK) {
                  xts_done(&xts);
                  return err;
               }
               err = xts_decrypt(&tests[i].CTX[len], len, &OUT[len], T, &xts);
               if (err != CRYPT_OK) {
                  xts_done(&xts);
                  return err;
               }
            }

            if (compare_testvector(OUT, tests[i].PTLEN, tests[i].PTX, tests[i].PTLEN, "XTS decrypt", i)) {
               xts_done(&xts);
               return CRYPT_FAIL_TESTVECTOR;
            }
            xts_done(&xts);
         }
      }
   }
   return CRYPT_OK;
#endif
}

#endif

/* ref:         $Format:%D$ */
/* git commit:  $Format:%H$ */
/* commit time: $Format:%ai$ */