Hi Stephan,
Any other ideas about this problem ? Since XTS is not amongst the
self-tests as you observed, is it safe to disable .fips_allowed for
xts(aes) in testmgr.c ?
Thanks
-Tapas
On 8/10/16, 5:08 PM, "Tapas Sarangi" <TSarangi@xxxxxxxxxxxxx> wrote:
>Hi Stephan,
>
>Thanks. Sorry for a late reply to this.
>
>I did test your patch for testmgr.h with the vanilla kernel 4.7 source.
>This doesn¹t solve the xts(aes) self-test failure in FIPS mode. I get the
>exact same error as before.
>
>Thanks
>-Tapas
>
>
>
>
>
>
>
>On 8/10/16, 12:49 AM, "Stephan Mueller" <smueller@xxxxxxxxxx> wrote:
>
>>Hi Tapas, Herbert,
>>
>>Tapas: this patch should fix it. Can you please test?
>>
>>Herbert: The reason why I have to caught this issue in my tests is the
>>following: I compile xts-aes-aesni statically as you can see below. The
>>self test is marked as passed, although there is no XTS test performed.
>>When you boot in FIPS mode, the testmgr prints out all tests. But XTS is
>>not among them. Do you have an idea why that happens?
>>
>>name : xts(aes)
>>driver : xts-aes-aesni
>>module : kernel
>>priority : 400
>>refcnt : 1
>>selftest : passed
>>internal : no
>>type : ablkcipher
>>async : yes
>>blocksize : 16
>>min keysize : 32
>>max keysize : 64
>>ivsize : 16
>>geniv : <default>
>>
>>---8<---
>>
>>In FIPS mode, setting XTS keys where the AES key is identical to the
>>tweak key is forbidden. Thus, the self test with such property will fail
>>in FIPS mode.
>>
>>As we have other tests available for XTS, this patch simply removes the
>>offending test vectors.
>>
>>Reported-by: Tapas Sarangi <TSarangi@xxxxxxxxxxxxx>
>>Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx>
>>---
>> crypto/testmgr.h | 36 ------------------------------------
>> 1 file changed, 36 deletions(-)
>>
>>diff --git a/crypto/testmgr.h b/crypto/testmgr.h
>>index acb6bbf..e4b58f5 100644
>>--- a/crypto/testmgr.h
>>+++ b/crypto/testmgr.h
>>@@ -10179,24 +10179,6 @@ static struct cipher_testvec
>>tf_lrw_dec_tv_template[] = {
>> static struct cipher_testvec tf_xts_enc_tv_template[] = {
>> /* Generated from AES-XTS test vectors */
>> {
>>- .key = "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00",
>>- .klen = 32,
>>- .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"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00",
>>- .ilen = 32,
>>- .result = "\x4b\xc9\x44\x4a\x11\xa3\xef\xac"
>>- "\x30\x74\xe4\x44\x52\x77\x97\x43"
>>- "\xa7\x60\xb2\x45\x2e\xf9\x00\x90"
>>- "\x9f\xaa\xfd\x89\x6e\x9d\x4a\xe0",
>>- .rlen = 32,
>>- }, {
>> .key = "\x11\x11\x11\x11\x11\x11\x11\x11"
>> "\x11\x11\x11\x11\x11\x11\x11\x11"
>> "\x22\x22\x22\x22\x22\x22\x22\x22"
>>@@ -10522,24 +10504,6 @@ static struct cipher_testvec
>>tf_xts_dec_tv_template[] = {
>> /* Generated from AES-XTS test vectors */
>> /* same as enc vectors with input and result reversed */
>> {
>>- .key = "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00",
>>- .klen = 32,
>>- .iv = "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00",
>>- .input = "\x4b\xc9\x44\x4a\x11\xa3\xef\xac"
>>- "\x30\x74\xe4\x44\x52\x77\x97\x43"
>>- "\xa7\x60\xb2\x45\x2e\xf9\x00\x90"
>>- "\x9f\xaa\xfd\x89\x6e\x9d\x4a\xe0",
>>- .ilen = 32,
>>- .result = "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00"
>>- "\x00\x00\x00\x00\x00\x00\x00\x00",
>>- .rlen = 32,
>>- }, {
>> .key = "\x11\x11\x11\x11\x11\x11\x11\x11"
>> "\x11\x11\x11\x11\x11\x11\x11\x11"
>> "\x22\x22\x22\x22\x22\x22\x22\x22"
>>--
>>2.7.4
>>
>>
>
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