*/
#include <crypto/algapi.h>
+#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
if (keylen > bs) {
struct hash_desc desc;
struct scatterlist tmp;
+ int tmplen;
int err;
desc.tfm = tfm;
desc.flags = crypto_hash_get_flags(parent);
desc.flags &= CRYPTO_TFM_REQ_MAY_SLEEP;
- sg_init_one(&tmp, inkey, keylen);
- err = crypto_hash_digest(&desc, &tmp, keylen, digest);
+ err = crypto_hash_init(&desc);
+ if (err)
+ return err;
+
+ tmplen = bs * 2 + ds;
+ sg_init_one(&tmp, ipad, tmplen);
+
+ for (; keylen > tmplen; inkey += tmplen, keylen -= tmplen) {
+ memcpy(ipad, inkey, tmplen);
+ err = crypto_hash_update(&desc, &tmp, tmplen);
+ if (err)
+ return err;
+ }
+
+ if (keylen) {
+ memcpy(ipad, inkey, keylen);
+ err = crypto_hash_update(&desc, &tmp, keylen);
+ if (err)
+ return err;
+ }
+
+ err = crypto_hash_final(&desc, digest);
if (err)
return err;
sg_init_table(sg1, 2);
sg_set_buf(sg1, ipad, bs);
- sg_set_page(&sg1[1], (void *) sg, 0, 0);
+ scatterwalk_sg_chain(sg1, 2, sg);
sg_init_table(sg2, 1);
sg_set_buf(sg2, opad, bs + ds);
struct crypto_instance *inst;
struct crypto_alg *alg;
int err;
+ int ds;
err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_HASH);
if (err)
alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_HASH,
CRYPTO_ALG_TYPE_HASH_MASK);
if (IS_ERR(alg))
- return ERR_PTR(PTR_ERR(alg));
+ return ERR_CAST(alg);
+
+ inst = ERR_PTR(-EINVAL);
+ ds = (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
+ CRYPTO_ALG_TYPE_HASH ? alg->cra_hash.digestsize :
+ alg->cra_digest.dia_digestsize;
+ if (ds > alg->cra_blocksize)
+ goto out_put_alg;
inst = crypto_alloc_instance("hmac", alg);
if (IS_ERR(inst))
inst->alg.cra_alignmask = alg->cra_alignmask;
inst->alg.cra_type = &crypto_hash_type;
- inst->alg.cra_hash.digestsize =
- (alg->cra_flags & CRYPTO_ALG_TYPE_MASK) ==
- CRYPTO_ALG_TYPE_HASH ? alg->cra_hash.digestsize :
- alg->cra_digest.dia_digestsize;
+ inst->alg.cra_hash.digestsize = ds;
inst->alg.cra_ctxsize = sizeof(struct hmac_ctx) +
- ALIGN(inst->alg.cra_blocksize * 2 +
- inst->alg.cra_hash.digestsize,
+ ALIGN(inst->alg.cra_blocksize * 2 + ds,
sizeof(void *));
inst->alg.cra_init = hmac_init_tfm;