gcm-test.c 4.12 KB
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#include "testutils.h"
#include "aes.h"
#include "gcm.h"

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static void
test_gcm_aes(unsigned key_length,
	     const uint8_t *key,
	     unsigned auth_length,
	     const uint8_t *authtext,
	     unsigned length,
	     const uint8_t *cleartext,
	     const uint8_t *ciphertext,
	     unsigned iv_length,
	     const uint8_t *iv,
	     const uint8_t *digest)
{
  struct gcm_aes_ctx ctx;

  uint8_t *data = xalloc(length);
  uint8_t buffer[GCM_BLOCK_SIZE];

  /* encryption */
  memset(buffer, 0, sizeof(buffer));
  gcm_aes_set_key(&ctx, key_length, key);

  gcm_aes_set_iv(&ctx, iv_length, iv);

  if (auth_length)
    gcm_aes_auth(&ctx, auth_length, authtext);
    
  if (length)
    gcm_aes_encrypt(&ctx, length, data, cleartext);

  gcm_aes_digest(&ctx, GCM_BLOCK_SIZE, buffer);

  if (!MEMEQ(length, data, ciphertext))
    FAIL();

  if (!MEMEQ(GCM_BLOCK_SIZE, buffer, digest))
    FAIL();

  /* decryption */
  memset(buffer, 0, sizeof(buffer));
  gcm_aes_set_iv(&ctx, iv_length, iv);

  if (auth_length)
    gcm_aes_auth(&ctx, auth_length, authtext);
    
  if (length)
    gcm_aes_decrypt(&ctx, length, data, data);

  gcm_aes_digest(&ctx, GCM_BLOCK_SIZE, buffer);

  if (!MEMEQ(length, data, cleartext))
    FAIL();

  if (!MEMEQ(GCM_BLOCK_SIZE, buffer, digest))
    FAIL();

  free(data);
}

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int
test_main(void)
{
  /* 
   * GCM-AES Test Vectors from
   * htt://www.cryptobarn.com/papers/gcm-spec.pdf
   */

  /* Test case 1 */
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  test_gcm_aes(/* key */HL("00000000000000000000000000000000"),
	       /* auth data */ HL(""),
	       /* plaintext */HL(""),
	       /* ciphertext*/H(""),
	       /* IV */HL("000000000000000000000000"),
	       /* tag */H("58e2fccefa7e3061367f1d57a4e7455a"));
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  /* Test case 2 */
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  test_gcm_aes(HL("00000000000000000000000000000000"),
	       HL(""),
	       HL("00000000000000000000000000000000"),
	       H("0388dace60b6a392f328c2b971b2fe78"),
	       HL("000000000000000000000000"),
	       H("ab6e47d42cec13bdf53a67b21257bddf"));
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  /* Test case 3 */
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  test_gcm_aes(HL("feffe9928665731c6d6a8f9467308308"),
	       HL(""),
	       HL("d9313225f88406e5a55909c5aff5269a"
		  "86a7a9531534f7da2e4c303d8a318a72"
		  "1c3c0c95956809532fcf0e2449a6b525"
		  "b16aedf5aa0de657ba637b391aafd255"),
	       H("42831ec2217774244b7221b784d0d49c"
		 "e3aa212f2c02a4e035c17e2329aca12e"
		 "21d514b25466931c7d8f6a5aac84aa05"
		 "1ba30b396a0aac973d58e091473f5985"),
	       HL("cafebabefacedbaddecaf888"),
	       H("4d5c2af327cd64a62cf35abd2ba6fab4"));
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  /* Test case 4 */
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  test_gcm_aes(HL("feffe9928665731c6d6a8f9467308308"),
	       HL("feedfacedeadbeeffeedfacedeadbeef"
		  "abaddad2"),
	       HL("d9313225f88406e5a55909c5aff5269a"
		  "86a7a9531534f7da2e4c303d8a318a72"
		  "1c3c0c95956809532fcf0e2449a6b525"
		  "b16aedf5aa0de657ba637b39"),
	       H("42831ec2217774244b7221b784d0d49c"
		 "e3aa212f2c02a4e035c17e2329aca12e"
		 "21d514b25466931c7d8f6a5aac84aa05"
		 "1ba30b396a0aac973d58e091"),
	       HL("cafebabefacedbaddecaf888"),
	       H("5bc94fbc3221a5db94fae95ae7121a47"));
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  /* Test case 5 */
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  test_gcm_aes(HL("feffe9928665731c6d6a8f9467308308"),
	       HL("feedfacedeadbeeffeedfacedeadbeef"
		  "abaddad2"),
	       HL("d9313225f88406e5a55909c5aff5269a"
		  "86a7a9531534f7da2e4c303d8a318a72"
		  "1c3c0c95956809532fcf0e2449a6b525"
		  "b16aedf5aa0de657ba637b39"),
	       H("61353b4c2806934a777ff51fa22a4755"
		 "699b2a714fcdc6f83766e5f97b6c7423"
		 "73806900e49f24b22b097544d4896b42"
		 "4989b5e1ebac0f07c23f4598"),
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	       HL("cafebabefacedbad"),
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	       H("3612d2e79e3b0785561be14aaca2fccb"));
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  /* Test case 6 */
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  test_gcm_aes(HL("feffe9928665731c6d6a8f9467308308"),
	       HL("feedfacedeadbeeffeedfacedeadbeef"
		  "abaddad2"),
	       HL("d9313225f88406e5a55909c5aff5269a"
		  "86a7a9531534f7da2e4c303d8a318a72"
		  "1c3c0c95956809532fcf0e2449a6b525"
		  "b16aedf5aa0de657ba637b39"),
	       H("8ce24998625615b603a033aca13fb894"
		 "be9112a5c3a211a8ba262a3cca7e2ca7"
		 "01e4a9a4fba43c90ccdcb281d48c7c6f"
		 "d62875d2aca417034c34aee5"),
	       HL("9313225df88406e555909c5aff5269aa"
		  "6a7a9538534f7da1e4c303d2a318a728"
		  "c3c0c95156809539fcf0e2429a6b5254"
		  "16aedbf5a0de6a57a637b39b"),
	       H("619cc5aefffe0bfa462af43c1699d050"));
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  SUCCESS();
}