diff options
Diffstat (limited to 'crypto/hash.c')
| -rw-r--r-- | crypto/hash.c | 38 |
1 files changed, 37 insertions, 1 deletions
diff --git a/crypto/hash.c b/crypto/hash.c index 4ccd22deef3..4d75ca7b57b 100644 --- a/crypto/hash.c +++ b/crypto/hash.c @@ -22,6 +22,42 @@ static unsigned int crypto_hash_ctxsize(struct crypto_alg *alg, u32 type, return alg->cra_ctxsize; } +static int hash_setkey_unaligned(struct crypto_hash *crt, const u8 *key, + unsigned int keylen) +{ + struct crypto_tfm *tfm = crypto_hash_tfm(crt); + struct hash_alg *alg = &tfm->__crt_alg->cra_hash; + unsigned long alignmask = crypto_hash_alignmask(crt); + int ret; + u8 *buffer, *alignbuffer; + unsigned long absize; + + absize = keylen + alignmask; + buffer = kmalloc(absize, GFP_ATOMIC); + if (!buffer) + return -ENOMEM; + + alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1); + memcpy(alignbuffer, key, keylen); + ret = alg->setkey(crt, alignbuffer, keylen); + memset(alignbuffer, 0, absize); + kfree(buffer); + return ret; +} + +static int hash_setkey(struct crypto_hash *crt, const u8 *key, + unsigned int keylen) +{ + struct crypto_tfm *tfm = crypto_hash_tfm(crt); + struct hash_alg *alg = &tfm->__crt_alg->cra_hash; + unsigned long alignmask = crypto_hash_alignmask(crt); + + if ((unsigned long)key & alignmask) + return hash_setkey_unaligned(crt, key, keylen); + + return alg->setkey(crt, key, keylen); +} + static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) { struct hash_tfm *crt = &tfm->crt_hash; @@ -34,7 +70,7 @@ static int crypto_init_hash_ops(struct crypto_tfm *tfm, u32 type, u32 mask) crt->update = alg->update; crt->final = alg->final; crt->digest = alg->digest; - crt->setkey = alg->setkey; + crt->setkey = hash_setkey; crt->digestsize = alg->digestsize; return 0; |