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| author | LEROY Christophe <christophe.leroy@c-s.fr> | 2017-10-06 16:04:37 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-12-14 11:53:04 +0300 |
| commit | 62744ebaeb91ff089865f90d0a0a1475a924809f (patch) | |
| tree | 46adb69b8e31daa711ff31cde385271e255b273a /drivers/crypto/talitos.c | |
| parent | 68b426477820e396f204e06c6de4063a82d63422 (diff) | |
| download | linux-62744ebaeb91ff089865f90d0a0a1475a924809f.tar.xz | |
crypto: talitos - fix setkey to check key weakness
commit f384cdc4faf350fdb6ad93c5f26952b9ba7c7566 upstream.
Crypto manager test report the following failures:
[ 3.061081] alg: skcipher: setkey failed on test 5 for ecb-des-talitos: flags=100
[ 3.069342] alg: skcipher-ddst: setkey failed on test 5 for ecb-des-talitos: flags=100
[ 3.077754] alg: skcipher-ddst: setkey failed on test 5 for ecb-des-talitos: flags=100
This is due to setkey being expected to detect weak keys.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/crypto/talitos.c')
| -rw-r--r-- | drivers/crypto/talitos.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/crypto/talitos.c b/drivers/crypto/talitos.c index 1e799886c57d..8aa1212086f4 100644 --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1507,12 +1507,20 @@ static int ablkcipher_setkey(struct crypto_ablkcipher *cipher, const u8 *key, unsigned int keylen) { struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher); + u32 tmp[DES_EXPKEY_WORDS]; if (keylen > TALITOS_MAX_KEY_SIZE) { crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN); return -EINVAL; } + if (unlikely(crypto_ablkcipher_get_flags(cipher) & + CRYPTO_TFM_REQ_WEAK_KEY) && + !des_ekey(tmp, key)) { + crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_WEAK_KEY); + return -EINVAL; + } + memcpy(&ctx->key, key, keylen); ctx->keylen = keylen; |