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| author | Leonidas Da Silva Barbosa <leosilva@linux.vnet.ibm.com> | 2015-08-14 15:14:16 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-08-18 04:30:36 +0200 |
| commit | 3c5f0ed78e976be705218cad62acf6a68e9d121e (patch) | |
| tree | c6095373c863c1da23a2b316bbb8bfa7daf3b02a /drivers/crypto | |
| parent | crypto: vmx - Fixing AES-CTR counter bug (diff) | |
| download | linux-3c5f0ed78e976be705218cad62acf6a68e9d121e.tar.xz linux-3c5f0ed78e976be705218cad62acf6a68e9d121e.zip | |
crypto: vmx - Fixing GHASH Key issue on little endian
GHASH table algorithm is using a big endian key.
In little endian machines key will be LE ordered.
After a lxvd2x instruction key is loaded as it is,
LE/BE order, in first case it'll generate a wrong
table resulting in wrong hashes from the algorithm.
Bug affects only LE machines.
In order to fix it we do a swap for loaded key.
Cc: stable@vger.kernel.org
Signed-off-by: Leonidas S Barbosa <leosilva@linux.vnet.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/vmx/ghashp8-ppc.pl | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/crypto/vmx/ghashp8-ppc.pl b/drivers/crypto/vmx/ghashp8-ppc.pl index 0a6f899839dd..d8429cb71f02 100644 --- a/drivers/crypto/vmx/ghashp8-ppc.pl +++ b/drivers/crypto/vmx/ghashp8-ppc.pl @@ -61,6 +61,12 @@ $code=<<___; mtspr 256,r0 li r10,0x30 lvx_u $H,0,r4 # load H + le?xor r7,r7,r7 + le?addi r7,r7,0x8 # need a vperm start with 08 + le?lvsr 5,0,r7 + le?vspltisb 6,0x0f + le?vxor 5,5,6 # set a b-endian mask + le?vperm $H,$H,$H,5 vspltisb $xC2,-16 # 0xf0 vspltisb $t0,1 # one |