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Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

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* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ccm - Fix handling of null assoc data
  crypto: blkcipher - Fix WARN_ON handling in walk_done
  crypto: authenc - Fix zero-length IV crash
This commit is contained in:
Linus Torvalds 2009-01-27 07:46:29 -08:00
commit ff2bad5f89
3 changed files with 18 additions and 10 deletions
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24
crypto/authenc.c
View File

@ -158,16 +158,19 @@ static int crypto_authenc_genicv(struct aead_request *req, u8 *iv,
dstp = sg_page(dst);
vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset;
sg_init_table(cipher, 2);
sg_set_buf(cipher, iv, ivsize);
authenc_chain(cipher, dst, vdst == iv + ivsize);
if (ivsize) {
sg_init_table(cipher, 2);
sg_set_buf(cipher, iv, ivsize);
authenc_chain(cipher, dst, vdst == iv + ivsize);
dst = cipher;
}
cryptlen = req->cryptlen + ivsize;
hash = crypto_authenc_hash(req, flags, cipher, cryptlen);
hash = crypto_authenc_hash(req, flags, dst, cryptlen);
if (IS_ERR(hash))
return PTR_ERR(hash);
scatterwalk_map_and_copy(hash, cipher, cryptlen,
scatterwalk_map_and_copy(hash, dst, cryptlen,
crypto_aead_authsize(authenc), 1);
return 0;
}
@ -285,11 +288,14 @@ static int crypto_authenc_iverify(struct aead_request *req, u8 *iv,
srcp = sg_page(src);
vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset;
sg_init_table(cipher, 2);
sg_set_buf(cipher, iv, ivsize);
authenc_chain(cipher, src, vsrc == iv + ivsize);
if (ivsize) {
sg_init_table(cipher, 2);
sg_set_buf(cipher, iv, ivsize);
authenc_chain(cipher, src, vsrc == iv + ivsize);
src = cipher;
}
return crypto_authenc_verify(req, cipher, cryptlen + ivsize);
return crypto_authenc_verify(req, src, cryptlen + ivsize);
}
static int crypto_authenc_decrypt(struct aead_request *req)

2
crypto/blkcipher.c
View File

@ -124,6 +124,7 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
scatterwalk_done(&walk->in, 0, nbytes);
scatterwalk_done(&walk->out, 1, nbytes);
err:
walk->total = nbytes;
walk->nbytes = nbytes;
@ -132,7 +133,6 @@ int blkcipher_walk_done(struct blkcipher_desc *desc,
return blkcipher_walk_next(desc, walk);
}
err:
if (walk->iv != desc->info)
memcpy(desc->info, walk->iv, crypto_blkcipher_ivsize(tfm));
if (walk->buffer != walk->page)

2
crypto/ccm.c
View File

@ -266,6 +266,8 @@ static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain,
if (assoclen) {
pctx->ilen = format_adata(idata, assoclen);
get_data_to_compute(cipher, pctx, req->assoc, req->assoclen);
} else {
pctx->ilen = 0;
}
/* compute plaintext into mac */