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crypto: aegis/generic - fix for big endian systems

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Use the correct __le32 annotation and accessors to perform the
single round of AES encryption performed inside the AEGIS transform.
Otherwise, tcrypt reports:

  alg: aead: Test 1 failed on encryption for aegis128-generic
  00000000: 6c 25 25 4a 3c 10 1d 27 2b c1 d4 84 9a ef 7f 6e
  alg: aead: Test 1 failed on encryption for aegis128l-generic
  00000000: cd c6 e3 b8 a0 70 9d 8e c2 4f 6f fe 71 42 df 28
  alg: aead: Test 1 failed on encryption for aegis256-generic
  00000000: aa ed 07 b1 96 1d e9 e6 f2 ed b5 8e 1c 5f dc 1c

Fixes: f606a88e58 ("crypto: aegis - Add generic AEGIS AEAD implementations")
Cc: <stable@vger.kernel.org> # v4.18+
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Ondrej Mosnacek <omosnace@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-10-01 10:36:38 +02:00 committed by Herbert Xu
parent 5a8dedfa32
commit 4a34e3c2f2
1 changed files with 9 additions and 11 deletions
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20
crypto/aegis.h
View File

@ -21,7 +21,7 @@
union aegis_block {
__le64 words64[AEGIS_BLOCK_SIZE / sizeof(__le64)];
u32 words32[AEGIS_BLOCK_SIZE / sizeof(u32)];
__le32 words32[AEGIS_BLOCK_SIZE / sizeof(__le32)];
u8 bytes[AEGIS_BLOCK_SIZE];
};
@ -57,24 +57,22 @@ static void crypto_aegis_aesenc(union aegis_block *dst,
const union aegis_block *src,
const union aegis_block *key)
{
u32 *d = dst->words32;
const u8 *s = src->bytes;
const u32 *k = key->words32;
const u32 *t0 = crypto_ft_tab[0];
const u32 *t1 = crypto_ft_tab[1];
const u32 *t2 = crypto_ft_tab[2];
const u32 *t3 = crypto_ft_tab[3];
u32 d0, d1, d2, d3;
d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]] ^ k[0];
d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]] ^ k[1];
d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]] ^ k[2];
d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]] ^ k[3];
d0 = t0[s[ 0]] ^ t1[s[ 5]] ^ t2[s[10]] ^ t3[s[15]];
d1 = t0[s[ 4]] ^ t1[s[ 9]] ^ t2[s[14]] ^ t3[s[ 3]];
d2 = t0[s[ 8]] ^ t1[s[13]] ^ t2[s[ 2]] ^ t3[s[ 7]];
d3 = t0[s[12]] ^ t1[s[ 1]] ^ t2[s[ 6]] ^ t3[s[11]];
d[0] = d0;
d[1] = d1;
d[2] = d2;
d[3] = d3;
dst->words32[0] = cpu_to_le32(d0) ^ key->words32[0];
dst->words32[1] = cpu_to_le32(d1) ^ key->words32[1];
dst->words32[2] = cpu_to_le32(d2) ^ key->words32[2];
dst->words32[3] = cpu_to_le32(d3) ^ key->words32[3];
}
#endif /* _CRYPTO_AEGIS_H */