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crypto: FIPS - allow tests to be disabled in FIPS mode

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In FIPS mode, additional restrictions may apply. If these restrictions
are violated, the kernel will panic(). This patch allows test vectors
for symmetric ciphers to be marked as to be skipped in FIPS mode.

Together with the patch, the XTS test vectors where the AES key is
identical to the tweak key is disabled in FIPS mode. This test vector
violates the FIPS requirement that both keys must be different.

Reported-by: Tapas Sarangi <TSarangi@trustwave.com>
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Stephan Mueller 2016-08-25 15:15:01 +02:00 committed by Herbert Xu
parent 93ba73fed3
commit 10faa8c0d6
2 changed files with 13 additions and 0 deletions
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9
crypto/testmgr.c
View File

@ -1008,6 +1008,9 @@ static int test_cipher(struct crypto_cipher *tfm, int enc,
if (template[i].np)
continue;
if (fips_enabled && template[i].fips_skip)
continue;
j++;
ret = -EINVAL;
@ -1112,6 +1115,9 @@ static int __test_skcipher(struct crypto_skcipher *tfm, int enc,
if (template[i].np && !template[i].also_non_np)
continue;
if (fips_enabled && template[i].fips_skip)
continue;
if (template[i].iv)
memcpy(iv, template[i].iv, ivsize);
else
@ -1198,6 +1204,9 @@ static int __test_skcipher(struct crypto_skcipher *tfm, int enc,
if (!template[i].np)
continue;
if (fips_enabled && template[i].fips_skip)
continue;
if (template[i].iv)
memcpy(iv, template[i].iv, ivsize);
else

4
crypto/testmgr.h
View File

@ -59,6 +59,7 @@ struct hash_testvec {
* @tap: How to distribute data in @np SGs
* @also_non_np: if set to 1, the test will be also done without
* splitting data in @np SGs
* @fips_skip: Skip the test vector in FIPS mode
*/
struct cipher_testvec {
@ -75,6 +76,7 @@ struct cipher_testvec {
unsigned char klen;
unsigned short ilen;
unsigned short rlen;
bool fips_skip;
};
struct aead_testvec {
@ -18224,6 +18226,7 @@ static struct cipher_testvec aes_xts_enc_tv_template[] = {
"\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00",
.klen = 32,
.fips_skip = 1,
.iv = "\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00",
.input = "\x00\x00\x00\x00\x00\x00\x00\x00"
@ -18566,6 +18569,7 @@ static struct cipher_testvec aes_xts_dec_tv_template[] = {
"\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00",
.klen = 32,
.fips_skip = 1,
.iv = "\x00\x00\x00\x00\x00\x00\x00\x00"
"\x00\x00\x00\x00\x00\x00\x00\x00",
.input = "\x91\x7c\xf6\x9e\xbd\x68\xb2\xec"