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?? ecrypt-test.c

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/* ecrypt-test.c */

/* 
 * API conformance test and test vector generation (DRAFT)
 *
 * Based on the NESSIE test suite (http://www.cryptonessie.org/)
 */

/* ------------------------------------------------------------------------- */

#define QUOTE(str) QUOTE_HELPER(str)
#define QUOTE_HELPER(str) # str

#include "ecrypt-portable.h"
#include QUOTE(ECRYPT_API)

#if defined(ECRYPT_SSYN) || defined(ECRYPT_SSYN_AE)
#error self-synchronising stream ciphers are not supported yet
#endif

#if defined(ECRYPT_SYNC_AE) || defined(ECRYPT_SSYN_AE)
#define ECRYPT_AE
#endif

#include <stdio.h>
#include <string.h>

#define MAXKEYSIZEB ((ECRYPT_MAXKEYSIZE + 7) / 8)
#define MAXIVSIZEB ((ECRYPT_MAXIVSIZE + 7) / 8)
#define MAXMACSIZEB ((ECRYPT_MAXMACSIZE + 7) / 8)

/* ------------------------------------------------------------------------- */

int compare_blocks(const u8 *m1, const u8 *m2, int len_bits)
{
  int i;
  const int lenb = (len_bits + 7) >> 3;
  const int mask0 = (1 << (((len_bits - 1) & 7) + 1)) - 1;

  if ((m1[0] & mask0) != (m2[0] & mask0))
    return 1;

  for (i = 1; i < lenb; i++)
    if (m1[i] != m2[i])
      return 1;
  
  return 0;
}

void print_data(FILE *fd, const char *str, const u8 *val, int len)
{
  int i;

  static const char hex[] = "0123456789ABCDEF";

  fprintf(fd, "%28s = ", str);

  for (i = 0; i < len; i++)
    {
      if (i > 0 && (i & 0xF) == 0 && (len > 24))
        fprintf(fd, "\n%28s   ", "");

      putc(hex[(val[i] >> 4) & 0xF], fd);
      putc(hex[(val[i]     ) & 0xF], fd);
    }

  fprintf(fd, "\n");
}

void print_chunk(FILE *fd, const char *str, const u8 *val, int start, int len)
{
  char indexed[80];

  sprintf(indexed, "%s[%d..%d]", str, start, start + len - 1);
  print_data(fd, indexed, val + start, len);
}

void xor_digest(const u8 *stream, int size, u8 *out, int outsize)
{
  int i;
  memset(out, 0, outsize);
  for (i = 0; i < size; i++)
    out[i % outsize] ^= stream[i];
}

/* ------------------------------------------------------------------------- */

#define TEST_STREAM_SIZEB 0x200
#define TEST_STREAM_SIZEB_SET4 0x20000
#define TEST_CHUNK 64

#ifdef ECRYPT_AE

#define CTX ECRYPT_AE_ctx
#define IVSETUP ECRYPT_AE_ivsetup
#define ENCRYPT_BYTES ECRYPT_AE_encrypt_bytes
#define DECRYPT_BYTES ECRYPT_AE_decrypt_bytes
#define AUTHENTICATE_BYTES ECRYPT_AE_authenticate_bytes
#define ENCRYPT_BLOCKS ECRYPT_AE_encrypt_blocks
#define DECRYPT_BLOCKS ECRYPT_AE_decrypt_blocks
#define KEYSETUP ECRYPT_AE_keysetup
#define ENCRYPT_PACKET ECRYPT_AE_encrypt_packet
#define DECRYPT_PACKET ECRYPT_AE_decrypt_packet
#define FINALIZE ECRYPT_AE_finalize

#else

#define CTX ECRYPT_ctx
#define IVSETUP ECRYPT_ivsetup
#define ENCRYPT_BYTES ECRYPT_encrypt_bytes
#define DECRYPT_BYTES ECRYPT_decrypt_bytes
#define ENCRYPT_BLOCKS ECRYPT_encrypt_blocks
#define DECRYPT_BLOCKS ECRYPT_decrypt_blocks

#define KEYSETUP(ctx, key, keysize, ivsize, macsize)                         \
  ECRYPT_keysetup(ctx, key, keysize, ivsize)

#define ENCRYPT_PACKET(                                                      \
    ctx, iv, aad, aadlen, plaintext, ciphertext, msglen, mac)                \
  ECRYPT_encrypt_packet(ctx, iv, plaintext, ciphertext, msglen)

#define DECRYPT_PACKET(                                                      \
    ctx, iv, aad, aadlen, ciphertext, plaintext, msglen, mac)                \
  ECRYPT_decrypt_packet(ctx, iv, ciphertext, plaintext, msglen)

#define FINALIZE(ctx, checkmac)

#endif

typedef struct
{
  int keysize;
  int ivsize;
  int msglen;

  CTX ctx;

  u8 key[MAXKEYSIZEB];
  u8 iv[MAXIVSIZEB];

  u8 plaintext[TEST_STREAM_SIZEB_SET4];
  u8 ciphertext[TEST_STREAM_SIZEB_SET4];
  u8 checktext[TEST_STREAM_SIZEB_SET4];

#ifdef ECRYPT_AE
  int macsize;
  int aadlen;

  u8 aad[TEST_CHUNK];
  u8 mac[MAXMACSIZEB];
  u8 checkmac[MAXMACSIZEB];
#endif

  u8 xored[TEST_CHUNK];

  FILE *fd;

} test_struct;

int errors = 0;

void encrypt_and_check(test_struct* t, void (*print)(test_struct*, int))
{
  const int blocks = t->msglen / ECRYPT_BLOCKLENGTH;
  const int tail = blocks * ECRYPT_BLOCKLENGTH;
  const int bytes = t->msglen % ECRYPT_BLOCKLENGTH;

  memset(t->ciphertext, 0, sizeof(t->ciphertext));
#ifdef ECRYPT_AE
  memset(t->mac, 0, sizeof(t->mac));
#endif

  KEYSETUP(&t->ctx, t->key, t->keysize, t->ivsize, t->macsize);
  ENCRYPT_PACKET(&t->ctx, t->iv, 
    t->aad, t->aadlen, t->plaintext, t->ciphertext, t->msglen, t->mac);

  print(t, 0);

#ifdef ECRYPT_AE
  memset(t->checkmac, 0, sizeof(t->checkmac));
#endif
  memset(t->checktext, 0, sizeof(t->checktext));

  KEYSETUP(&t->ctx, t->key, t->keysize, t->ivsize, t->macsize);
  DECRYPT_PACKET(&t->ctx, t->iv, 
    t->aad, t->aadlen, t->ciphertext, t->checktext, t->msglen, t->checkmac);

  if (compare_blocks(t->plaintext, t->checktext, t->msglen * 8) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> decrypt_packet:\n"
	      "*** decrypted text differs from plaintext:\n");
      print(t, 1);
    }
#ifdef ECRYPT_AE
  else if (compare_blocks(t->mac, t->checkmac, t->macsize) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> decrypt_packet:\n"
	      "*** decryption MAC differs from encryption MAC:\n");
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8);
    }

  memset(t->checkmac, 0, sizeof(t->checkmac));
#endif
  memset(t->checktext, 0, sizeof(t->checktext));

  IVSETUP(&t->ctx, t->iv);

#ifdef ECRYPT_SUPPORTS_AAD
  AUTHENTICATE_BYTES(&t->ctx, t->aad, t->aadlen);
#endif

  ENCRYPT_BYTES(&t->ctx, t->plaintext, t->checktext, t->msglen);
  FINALIZE(&t->ctx, t->checkmac);

  if (compare_blocks(t->ciphertext, t->checktext, t->msglen * 8) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> encrypt_bytes:\n"
	      "*** encrypt_bytes generates different ciphertext:\n");
      print(t, 2);
    }
#ifdef ECRYPT_AE
  else if (compare_blocks(t->mac, t->checkmac, t->macsize) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> encrypt_bytes:\n"
	      "*** encrypt_bytes generates different MAC:\n");
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8);
    }

  memset(t->checkmac, 0, sizeof(t->checkmac));
#endif
  memset(t->checktext, 0, sizeof(t->checktext));

  IVSETUP(&t->ctx, t->iv);

#ifdef ECRYPT_SUPPORTS_AAD
  AUTHENTICATE_BYTES(&t->ctx, t->aad, t->aadlen);
#endif

  DECRYPT_BYTES(&t->ctx, t->ciphertext, t->checktext, t->msglen);
  FINALIZE(&t->ctx, t->checkmac);

  if (compare_blocks(t->plaintext, t->checktext, t->msglen * 8) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> decrypt_bytes:\n"
	      "*** decrypt_bytes generates different plaintext:\n");
      print(t, 2);
    }
#ifdef ECRYPT_AE
  else if (compare_blocks(t->mac, t->checkmac, t->macsize) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> decrypt_bytes:\n"
	      "*** decrypt_bytes generates different MAC:\n");
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8);
    }

  memset(t->checkmac, 0, sizeof(t->checkmac));
#endif
  memset(t->checktext, 0, sizeof(t->checktext));

  IVSETUP(&t->ctx, t->iv);

#ifdef ECRYPT_SUPPORTS_AAD
  AUTHENTICATE_BYTES(&t->ctx, t->aad, t->aadlen);
#endif

  ENCRYPT_BLOCKS(&t->ctx, t->plaintext, t->checktext, blocks);
  ENCRYPT_BYTES(&t->ctx, t->plaintext + tail, t->checktext + tail, bytes);
  FINALIZE(&t->ctx, t->checkmac);

  if (compare_blocks(t->ciphertext, t->checktext, t->msglen * 8) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> encrypt_blocks/bytes:\n"
	      "*** encrypt_blocks/bytes generates different ciphertext:\n");
      print(t, 2);
    }
#ifdef ECRYPT_AE
  else if (compare_blocks(t->mac, t->checkmac, t->macsize) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> encrypt_blocks/bytes:\n"
	      "*** encrypt_blocks/bytes generates different MAC:\n");
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8);
    }

  memset(t->checkmac, 0, sizeof(t->checkmac));
#endif
  memset(t->checktext, 0, sizeof(t->checktext));

  IVSETUP(&t->ctx, t->iv);

#ifdef ECRYPT_SUPPORTS_AAD
  AUTHENTICATE_BYTES(&t->ctx, t->aad, t->aadlen);
#endif

  DECRYPT_BLOCKS(&t->ctx, t->ciphertext, t->checktext, blocks);
  DECRYPT_BYTES(&t->ctx, t->ciphertext + tail, t->checktext + tail, bytes);
  FINALIZE(&t->ctx, t->checkmac);

  if (compare_blocks(t->plaintext, t->checktext, t->msglen * 8) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> decrypt_blocks/bytes:\n"
	      "*** decrypt_blocks/bytes generates different plaintext:\n");
      print(t, 2);
    }
#ifdef ECRYPT_AE
  else if (compare_blocks(t->mac, t->checkmac, t->macsize) != 0)
    {
      ++errors;
      fprintf(t->fd, 
	      "*** ERROR: encrypt_packet <-> decrypt_blocks/bytes:\n"
	      "*** decrypt_blocks/bytes generates different MAC:\n");
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8);
    }
#endif

  fprintf(t->fd, "\n");
}

void print_stream(test_struct* t, int type)
{
  const int chunk = TEST_CHUNK;

  switch (type)
    {
    case 0:
      print_data(t->fd, "key", t->key, (t->keysize + 7) / 8); 
      print_data(t->fd, "IV", t->iv, (t->ivsize + 7) / 8);    
      
      print_chunk(t->fd, "stream", t->ciphertext, 0, chunk);
      print_chunk(t->fd, "stream", t->ciphertext, t->msglen/2-chunk, chunk);
      print_chunk(t->fd, "stream", t->ciphertext, t->msglen/2, chunk);         
      print_chunk(t->fd, "stream", t->ciphertext, t->msglen-chunk, chunk);
      
      xor_digest(t->ciphertext, t->msglen, t->xored, chunk);
      print_data(t->fd, "xor-digest", t->xored, chunk);  
      
#ifdef ECRYPT_AE
      print_data(t->fd, "MAC", t->mac, (t->macsize + 7) / 8); 
#endif
      break;
    case 1:
      print_chunk(t->fd, "decryption", t->checktext, 0, chunk);
      print_chunk(t->fd, "decryption", t->checktext, t->msglen/2-chunk, chunk);
      print_chunk(t->fd, "decryption", t->checktext, t->msglen/2, chunk);
      print_chunk(t->fd, "decryption", t->checktext, t->msglen-chunk, chunk);
      
      xor_digest(t->checktext, t->msglen, t->xored, chunk);                    
      print_data(t->fd, "xor-digest", t->xored, chunk);  

#ifdef ECRYPT_AE
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8); 
#endif
      break;
    case 2:
      print_chunk(t->fd, "stream", t->checktext, 0, chunk);
      print_chunk(t->fd, "stream", t->checktext, t->msglen/2-chunk, chunk);
      print_chunk(t->fd, "stream", t->checktext, t->msglen/2, chunk);         
      print_chunk(t->fd, "stream", t->checktext, t->msglen-chunk, chunk);
      
      xor_digest(t->checktext, t->msglen, t->xored, chunk);                    
      print_data(t->fd, "xor-digest", t->xored, chunk); 
 
#ifdef ECRYPT_AE   
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8); 
#endif
      break;
    }
}

void print_pair(test_struct* t, int type)
{
  switch (type)
    {
    case 0:
      print_data(t->fd, "key", t->key, (t->keysize + 7) / 8); 
      print_data(t->fd, "IV", t->iv, (t->ivsize + 7) / 8);

#ifdef ECRYPT_SUPPORTS_AAD
      if (t->aadlen)
	print_data(t->fd, "AAD", t->aad, t->aadlen);
#endif
      print_data(t->fd, "plaintext", t->plaintext, t->msglen);
      print_data(t->fd, "ciphertext", t->ciphertext, t->msglen); 
#ifdef ECRYPT_AE
      print_data(t->fd, "MAC", t->mac, (t->macsize + 7) / 8);      
#endif
      break;
    case 1:
      print_data(t->fd, "decryption", t->checktext, t->msglen); 
#ifdef ECRYPT_AE
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8); 
#endif
      break;
    case 2:
      print_data(t->fd, "ciphertext", t->checktext, t->msglen);
#ifdef ECRYPT_AE 
      print_data(t->fd, "MAC", t->checkmac, (t->macsize + 7) / 8); 
#endif
      break;
    }
}

void test_vectors(FILE *fd, int keysize, int ivsize, int macsize)
{

#define STREAM_VECTOR(set, vector)                                           \
  do {                                                                       \
    fprintf(fd, "Set %d, vector#%3d:\n", set, vector);                       \
    encrypt_and_check(&t, print_stream);                                     \
  } while (0)

#define MAC_VECTOR(set, vector)                                              \
  do {                                                                       \
    fprintf(fd, "Set %d, vector#%3d:\n", set, vector);                       \
    encrypt_and_check(&t, print_pair);                                       \
  } while (0)

#define AAD_VECTOR(set, vector)                                              \
  do {                                                                       \
    fprintf(fd, "Set %d, vector#%3d:\n", set, vector);                       \
    encrypt_and_check(&t, print_pair);                                       \
  } while (0)

  test_struct t;
  int i, v;

  fprintf(fd, 
	  "****************************************"
	  "****************************************\n");
  fprintf(fd, 
	  "*                          ECRYPT Stream"
	  " Cipher Project                        *\n");
  fprintf(fd, 
	  "****************************************"
	  "****************************************\n");
  fprintf(fd, "\n");
  fprintf(fd, "Primitive Name: %s\n", ECRYPT_NAME);
  fprintf(fd, "================%.*s\n", (int)strlen(ECRYPT_NAME),
	  "==========================================");
  fprintf(fd, "Key size: %d bits\n", keysize);
  fprintf(fd, "IV size: %d bits\n", ivsize);
#ifdef ECRYPT_AE
  fprintf(fd, "MAC size: %d bits\n", macsize);
#endif
  fprintf(fd, "\n");
  fprintf(fd, "Preferred block length: %d bytes\n", ECRYPT_BLOCKLENGTH);

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