*
*/
-#include <crypto/algapi.h>
+#include <crypto/aead.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/authenc.h>
+#include <crypto/scatterwalk.h>
#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/rtnetlink.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
-#include "scatterwalk.h"
+typedef u8 *(*authenc_ahash_t)(struct aead_request *req, unsigned int flags);
struct authenc_instance_ctx {
- struct crypto_spawn auth;
- struct crypto_spawn enc;
-
- unsigned int authsize;
- unsigned int enckeylen;
+ struct crypto_ahash_spawn auth;
+ struct crypto_skcipher_spawn enc;
};
struct crypto_authenc_ctx {
- spinlock_t auth_lock;
- struct crypto_hash *auth;
+ unsigned int reqoff;
+ struct crypto_ahash *auth;
struct crypto_ablkcipher *enc;
};
+struct authenc_request_ctx {
+ unsigned int cryptlen;
+ struct scatterlist *sg;
+ struct scatterlist asg[2];
+ struct scatterlist cipher[2];
+ crypto_completion_t complete;
+ crypto_completion_t update_complete;
+ char tail[];
+};
+
static int crypto_authenc_setkey(struct crypto_aead *authenc, const u8 *key,
unsigned int keylen)
{
- struct authenc_instance_ctx *ictx =
- crypto_instance_ctx(crypto_aead_alg_instance(authenc));
- unsigned int enckeylen = ictx->enckeylen;
unsigned int authkeylen;
+ unsigned int enckeylen;
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
- struct crypto_hash *auth = ctx->auth;
+ struct crypto_ahash *auth = ctx->auth;
struct crypto_ablkcipher *enc = ctx->enc;
+ struct rtattr *rta = (void *)key;
+ struct crypto_authenc_key_param *param;
int err = -EINVAL;
- if (keylen < enckeylen) {
- crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
- goto out;
- }
+ if (!RTA_OK(rta, keylen))
+ goto badkey;
+ if (rta->rta_type != CRYPTO_AUTHENC_KEYA_PARAM)
+ goto badkey;
+ if (RTA_PAYLOAD(rta) < sizeof(*param))
+ goto badkey;
+
+ param = RTA_DATA(rta);
+ enckeylen = be32_to_cpu(param->enckeylen);
+
+ key += RTA_ALIGN(rta->rta_len);
+ keylen -= RTA_ALIGN(rta->rta_len);
+
+ if (keylen < enckeylen)
+ goto badkey;
+
authkeylen = keylen - enckeylen;
- crypto_hash_clear_flags(auth, CRYPTO_TFM_REQ_MASK);
- crypto_hash_set_flags(auth, crypto_aead_get_flags(authenc) &
+ crypto_ahash_clear_flags(auth, CRYPTO_TFM_REQ_MASK);
+ crypto_ahash_set_flags(auth, crypto_aead_get_flags(authenc) &
CRYPTO_TFM_REQ_MASK);
- err = crypto_hash_setkey(auth, key, authkeylen);
- crypto_aead_set_flags(authenc, crypto_hash_get_flags(auth) &
+ err = crypto_ahash_setkey(auth, key, authkeylen);
+ crypto_aead_set_flags(authenc, crypto_ahash_get_flags(auth) &
CRYPTO_TFM_RES_MASK);
if (err)
out:
return err;
+
+badkey:
+ crypto_aead_set_flags(authenc, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ goto out;
+}
+
+static void authenc_chain(struct scatterlist *head, struct scatterlist *sg,
+ int chain)
+{
+ if (chain) {
+ head->length += sg->length;
+ sg = scatterwalk_sg_next(sg);
+ }
+
+ if (sg)
+ scatterwalk_sg_chain(head, 2, sg);
+ else
+ sg_mark_end(head);
}
-static int crypto_authenc_hash(struct aead_request *req)
+static void authenc_geniv_ahash_update_done(struct crypto_async_request *areq,
+ int err)
{
+ struct aead_request *req = areq->data;
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
- struct authenc_instance_ctx *ictx =
- crypto_instance_ctx(crypto_aead_alg_instance(authenc));
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
- struct crypto_hash *auth = ctx->auth;
- struct hash_desc desc = {
- .tfm = auth,
- };
- u8 *hash = aead_request_ctx(req);
- struct scatterlist *dst = req->dst;
- unsigned int cryptlen = req->cryptlen;
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
+
+ if (err)
+ goto out;
+
+ ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result,
+ areq_ctx->cryptlen);
+ ahash_request_set_callback(ahreq, aead_request_flags(req) &
+ CRYPTO_TFM_REQ_MAY_SLEEP,
+ areq_ctx->complete, req);
+
+ err = crypto_ahash_finup(ahreq);
+ if (err)
+ goto out;
+
+ scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
+ areq_ctx->cryptlen,
+ crypto_aead_authsize(authenc), 1);
+
+out:
+ aead_request_complete(req, err);
+}
+
+static void authenc_geniv_ahash_done(struct crypto_async_request *areq, int err)
+{
+ struct aead_request *req = areq->data;
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
+
+ if (err)
+ goto out;
+
+ scatterwalk_map_and_copy(ahreq->result, areq_ctx->sg,
+ areq_ctx->cryptlen,
+ crypto_aead_authsize(authenc), 1);
+
+out:
+ aead_request_complete(req, err);
+}
+
+static void authenc_verify_ahash_update_done(struct crypto_async_request *areq,
+ int err)
+{
+ u8 *ihash;
+ unsigned int authsize;
+ struct ablkcipher_request *abreq;
+ struct aead_request *req = areq->data;
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
+
+ if (err)
+ goto out;
+
+ ahash_request_set_crypt(ahreq, areq_ctx->sg, ahreq->result,
+ areq_ctx->cryptlen);
+ ahash_request_set_callback(ahreq, aead_request_flags(req) &
+ CRYPTO_TFM_REQ_MAY_SLEEP,
+ areq_ctx->complete, req);
+
+ err = crypto_ahash_finup(ahreq);
+ if (err)
+ goto out;
+
+ authsize = crypto_aead_authsize(authenc);
+ ihash = ahreq->result + authsize;
+ scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
+ authsize, 0);
+
+ err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG: 0;
+ if (err)
+ goto out;
+
+ abreq = aead_request_ctx(req);
+ ablkcipher_request_set_tfm(abreq, ctx->enc);
+ ablkcipher_request_set_callback(abreq, aead_request_flags(req),
+ req->base.complete, req->base.data);
+ ablkcipher_request_set_crypt(abreq, req->src, req->dst,
+ req->cryptlen, req->iv);
+
+ err = crypto_ablkcipher_decrypt(abreq);
+
+out:
+ aead_request_complete(req, err);
+}
+
+static void authenc_verify_ahash_done(struct crypto_async_request *areq,
+ int err)
+{
+ u8 *ihash;
+ unsigned int authsize;
+ struct ablkcipher_request *abreq;
+ struct aead_request *req = areq->data;
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
+
+ if (err)
+ goto out;
+
+ authsize = crypto_aead_authsize(authenc);
+ ihash = ahreq->result + authsize;
+ scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
+ authsize, 0);
+
+ err = memcmp(ihash, ahreq->result, authsize) ? -EBADMSG: 0;
+ if (err)
+ goto out;
+
+ abreq = aead_request_ctx(req);
+ ablkcipher_request_set_tfm(abreq, ctx->enc);
+ ablkcipher_request_set_callback(abreq, aead_request_flags(req),
+ req->base.complete, req->base.data);
+ ablkcipher_request_set_crypt(abreq, req->src, req->dst,
+ req->cryptlen, req->iv);
+
+ err = crypto_ablkcipher_decrypt(abreq);
+
+out:
+ aead_request_complete(req, err);
+}
+
+static u8 *crypto_authenc_ahash_fb(struct aead_request *req, unsigned int flags)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
+ struct crypto_ahash *auth = ctx->auth;
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
+ u8 *hash = areq_ctx->tail;
int err;
- hash = (u8 *)ALIGN((unsigned long)hash + crypto_hash_alignmask(auth),
- crypto_hash_alignmask(auth) + 1);
+ hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth),
+ crypto_ahash_alignmask(auth) + 1);
+
+ ahash_request_set_tfm(ahreq, auth);
- spin_lock_bh(&ctx->auth_lock);
- err = crypto_hash_init(&desc);
+ err = crypto_ahash_init(ahreq);
if (err)
- goto auth_unlock;
+ return ERR_PTR(err);
+
+ ahash_request_set_crypt(ahreq, req->assoc, hash, req->assoclen);
+ ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
+ areq_ctx->update_complete, req);
- err = crypto_hash_update(&desc, req->assoc, req->assoclen);
+ err = crypto_ahash_update(ahreq);
if (err)
- goto auth_unlock;
+ return ERR_PTR(err);
+
+ ahash_request_set_crypt(ahreq, areq_ctx->sg, hash,
+ areq_ctx->cryptlen);
+ ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
+ areq_ctx->complete, req);
- err = crypto_hash_update(&desc, dst, cryptlen);
+ err = crypto_ahash_finup(ahreq);
if (err)
- goto auth_unlock;
+ return ERR_PTR(err);
+
+ return hash;
+}
+
+static u8 *crypto_authenc_ahash(struct aead_request *req, unsigned int flags)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
+ struct crypto_ahash *auth = ctx->auth;
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct ahash_request *ahreq = (void *)(areq_ctx->tail + ctx->reqoff);
+ u8 *hash = areq_ctx->tail;
+ int err;
+
+ hash = (u8 *)ALIGN((unsigned long)hash + crypto_ahash_alignmask(auth),
+ crypto_ahash_alignmask(auth) + 1);
- err = crypto_hash_final(&desc, hash);
-auth_unlock:
- spin_unlock_bh(&ctx->auth_lock);
+ ahash_request_set_tfm(ahreq, auth);
+ ahash_request_set_crypt(ahreq, areq_ctx->sg, hash,
+ areq_ctx->cryptlen);
+ ahash_request_set_callback(ahreq, aead_request_flags(req) & flags,
+ areq_ctx->complete, req);
+ err = crypto_ahash_digest(ahreq);
if (err)
- return err;
+ return ERR_PTR(err);
+
+ return hash;
+}
+
+static int crypto_authenc_genicv(struct aead_request *req, u8 *iv,
+ unsigned int flags)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct scatterlist *dst = req->dst;
+ struct scatterlist *assoc = req->assoc;
+ struct scatterlist *cipher = areq_ctx->cipher;
+ struct scatterlist *asg = areq_ctx->asg;
+ unsigned int ivsize = crypto_aead_ivsize(authenc);
+ unsigned int cryptlen = req->cryptlen;
+ authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb;
+ struct page *dstp;
+ u8 *vdst;
+ u8 *hash;
+
+ dstp = sg_page(dst);
+ vdst = PageHighMem(dstp) ? NULL : page_address(dstp) + dst->offset;
+
+ if (ivsize) {
+ sg_init_table(cipher, 2);
+ sg_set_buf(cipher, iv, ivsize);
+ authenc_chain(cipher, dst, vdst == iv + ivsize);
+ dst = cipher;
+ cryptlen += ivsize;
+ }
+
+ if (sg_is_last(assoc)) {
+ authenc_ahash_fn = crypto_authenc_ahash;
+ sg_init_table(asg, 2);
+ sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset);
+ authenc_chain(asg, dst, 0);
+ dst = asg;
+ cryptlen += req->assoclen;
+ }
+
+ areq_ctx->cryptlen = cryptlen;
+ areq_ctx->sg = dst;
- scatterwalk_map_and_copy(hash, dst, cryptlen, ictx->authsize, 1);
+ areq_ctx->complete = authenc_geniv_ahash_done;
+ areq_ctx->update_complete = authenc_geniv_ahash_update_done;
+
+ hash = authenc_ahash_fn(req, flags);
+ if (IS_ERR(hash))
+ return PTR_ERR(hash);
+
+ scatterwalk_map_and_copy(hash, dst, cryptlen,
+ crypto_aead_authsize(authenc), 1);
return 0;
}
static void crypto_authenc_encrypt_done(struct crypto_async_request *req,
int err)
{
- if (!err)
- err = crypto_authenc_hash(req->data);
+ struct aead_request *areq = req->data;
+
+ if (!err) {
+ struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
+ struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
+ struct ablkcipher_request *abreq = aead_request_ctx(areq);
+ u8 *iv = (u8 *)(abreq + 1) +
+ crypto_ablkcipher_reqsize(ctx->enc);
- aead_request_complete(req->data, err);
+ err = crypto_authenc_genicv(areq, iv, 0);
+ }
+
+ aead_request_complete(areq, err);
}
static int crypto_authenc_encrypt(struct aead_request *req)
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
struct ablkcipher_request *abreq = aead_request_ctx(req);
+ struct crypto_ablkcipher *enc = ctx->enc;
+ struct scatterlist *dst = req->dst;
+ unsigned int cryptlen = req->cryptlen;
+ u8 *iv = (u8 *)(abreq + 1) + crypto_ablkcipher_reqsize(enc);
int err;
- ablkcipher_request_set_tfm(abreq, ctx->enc);
+ ablkcipher_request_set_tfm(abreq, enc);
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
crypto_authenc_encrypt_done, req);
- ablkcipher_request_set_crypt(abreq, req->src, req->dst, req->cryptlen,
- req->iv);
+ ablkcipher_request_set_crypt(abreq, req->src, dst, cryptlen, req->iv);
+
+ memcpy(iv, req->iv, crypto_aead_ivsize(authenc));
err = crypto_ablkcipher_encrypt(abreq);
if (err)
return err;
- return crypto_authenc_hash(req);
+ return crypto_authenc_genicv(req, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
}
-static int crypto_authenc_verify(struct aead_request *req)
+static void crypto_authenc_givencrypt_done(struct crypto_async_request *req,
+ int err)
{
- struct crypto_aead *authenc = crypto_aead_reqtfm(req);
- struct authenc_instance_ctx *ictx =
- crypto_instance_ctx(crypto_aead_alg_instance(authenc));
+ struct aead_request *areq = req->data;
+
+ if (!err) {
+ struct skcipher_givcrypt_request *greq = aead_request_ctx(areq);
+
+ err = crypto_authenc_genicv(areq, greq->giv, 0);
+ }
+
+ aead_request_complete(areq, err);
+}
+
+static int crypto_authenc_givencrypt(struct aead_givcrypt_request *req)
+{
+ struct crypto_aead *authenc = aead_givcrypt_reqtfm(req);
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
- struct crypto_hash *auth = ctx->auth;
- struct hash_desc desc = {
- .tfm = auth,
- .flags = aead_request_flags(req),
- };
- u8 *ohash = aead_request_ctx(req);
- u8 *ihash;
- struct scatterlist *src = req->src;
- unsigned int cryptlen = req->cryptlen;
- unsigned int authsize;
+ struct aead_request *areq = &req->areq;
+ struct skcipher_givcrypt_request *greq = aead_request_ctx(areq);
+ u8 *iv = req->giv;
int err;
- ohash = (u8 *)ALIGN((unsigned long)ohash + crypto_hash_alignmask(auth),
- crypto_hash_alignmask(auth) + 1);
- ihash = ohash + crypto_hash_digestsize(auth);
+ skcipher_givcrypt_set_tfm(greq, ctx->enc);
+ skcipher_givcrypt_set_callback(greq, aead_request_flags(areq),
+ crypto_authenc_givencrypt_done, areq);
+ skcipher_givcrypt_set_crypt(greq, areq->src, areq->dst, areq->cryptlen,
+ areq->iv);
+ skcipher_givcrypt_set_giv(greq, iv, req->seq);
- spin_lock_bh(&ctx->auth_lock);
- err = crypto_hash_init(&desc);
+ err = crypto_skcipher_givencrypt(greq);
if (err)
- goto auth_unlock;
+ return err;
- err = crypto_hash_update(&desc, req->assoc, req->assoclen);
- if (err)
- goto auth_unlock;
+ return crypto_authenc_genicv(areq, iv, CRYPTO_TFM_REQ_MAY_SLEEP);
+}
- err = crypto_hash_update(&desc, src, cryptlen);
- if (err)
- goto auth_unlock;
+static int crypto_authenc_verify(struct aead_request *req,
+ authenc_ahash_t authenc_ahash_fn)
+{
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ u8 *ohash;
+ u8 *ihash;
+ unsigned int authsize;
- err = crypto_hash_final(&desc, ohash);
-auth_unlock:
- spin_unlock_bh(&ctx->auth_lock);
+ areq_ctx->complete = authenc_verify_ahash_done;
+ areq_ctx->complete = authenc_verify_ahash_update_done;
- if (err)
- return err;
+ ohash = authenc_ahash_fn(req, CRYPTO_TFM_REQ_MAY_SLEEP);
+ if (IS_ERR(ohash))
+ return PTR_ERR(ohash);
- authsize = ictx->authsize;
- scatterwalk_map_and_copy(ihash, src, cryptlen, authsize, 0);
- return memcmp(ihash, ohash, authsize) ? -EINVAL : 0;
+ authsize = crypto_aead_authsize(authenc);
+ ihash = ohash + authsize;
+ scatterwalk_map_and_copy(ihash, areq_ctx->sg, areq_ctx->cryptlen,
+ authsize, 0);
+ return memcmp(ihash, ohash, authsize) ? -EBADMSG: 0;
}
-static void crypto_authenc_decrypt_done(struct crypto_async_request *req,
- int err)
+static int crypto_authenc_iverify(struct aead_request *req, u8 *iv,
+ unsigned int cryptlen)
{
- aead_request_complete(req->data, err);
+ struct crypto_aead *authenc = crypto_aead_reqtfm(req);
+ struct authenc_request_ctx *areq_ctx = aead_request_ctx(req);
+ struct scatterlist *src = req->src;
+ struct scatterlist *assoc = req->assoc;
+ struct scatterlist *cipher = areq_ctx->cipher;
+ struct scatterlist *asg = areq_ctx->asg;
+ unsigned int ivsize = crypto_aead_ivsize(authenc);
+ authenc_ahash_t authenc_ahash_fn = crypto_authenc_ahash_fb;
+ struct page *srcp;
+ u8 *vsrc;
+
+ srcp = sg_page(src);
+ vsrc = PageHighMem(srcp) ? NULL : page_address(srcp) + src->offset;
+
+ if (ivsize) {
+ sg_init_table(cipher, 2);
+ sg_set_buf(cipher, iv, ivsize);
+ authenc_chain(cipher, src, vsrc == iv + ivsize);
+ src = cipher;
+ cryptlen += ivsize;
+ }
+
+ if (sg_is_last(assoc)) {
+ authenc_ahash_fn = crypto_authenc_ahash;
+ sg_init_table(asg, 2);
+ sg_set_page(asg, sg_page(assoc), assoc->length, assoc->offset);
+ authenc_chain(asg, src, 0);
+ src = asg;
+ cryptlen += req->assoclen;
+ }
+
+ areq_ctx->cryptlen = cryptlen;
+ areq_ctx->sg = src;
+
+ return crypto_authenc_verify(req, authenc_ahash_fn);
}
static int crypto_authenc_decrypt(struct aead_request *req)
struct crypto_aead *authenc = crypto_aead_reqtfm(req);
struct crypto_authenc_ctx *ctx = crypto_aead_ctx(authenc);
struct ablkcipher_request *abreq = aead_request_ctx(req);
+ unsigned int cryptlen = req->cryptlen;
+ unsigned int authsize = crypto_aead_authsize(authenc);
+ u8 *iv = req->iv;
int err;
- err = crypto_authenc_verify(req);
+ if (cryptlen < authsize)
+ return -EINVAL;
+ cryptlen -= authsize;
+
+ err = crypto_authenc_iverify(req, iv, cryptlen);
if (err)
return err;
ablkcipher_request_set_tfm(abreq, ctx->enc);
ablkcipher_request_set_callback(abreq, aead_request_flags(req),
- crypto_authenc_decrypt_done, req);
- ablkcipher_request_set_crypt(abreq, req->src, req->dst, req->cryptlen,
- req->iv);
+ req->base.complete, req->base.data);
+ ablkcipher_request_set_crypt(abreq, req->src, req->dst, cryptlen, iv);
return crypto_ablkcipher_decrypt(abreq);
}
static int crypto_authenc_init_tfm(struct crypto_tfm *tfm)
{
- struct crypto_instance *inst = (void *)tfm->__crt_alg;
+ struct crypto_instance *inst = crypto_tfm_alg_instance(tfm);
struct authenc_instance_ctx *ictx = crypto_instance_ctx(inst);
struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm);
- struct crypto_hash *auth;
+ struct crypto_ahash *auth;
struct crypto_ablkcipher *enc;
- unsigned int digestsize;
int err;
- auth = crypto_spawn_hash(&ictx->auth);
+ auth = crypto_spawn_ahash(&ictx->auth);
if (IS_ERR(auth))
return PTR_ERR(auth);
- err = -EINVAL;
- digestsize = crypto_hash_digestsize(auth);
- if (ictx->authsize > digestsize)
- goto err_free_hash;
+ ctx->reqoff = ALIGN(2 * crypto_ahash_digestsize(auth) +
+ crypto_ahash_alignmask(auth),
+ crypto_ahash_alignmask(auth) + 1);
- enc = crypto_spawn_ablkcipher(&ictx->enc);
+ enc = crypto_spawn_skcipher(&ictx->enc);
err = PTR_ERR(enc);
if (IS_ERR(enc))
- goto err_free_hash;
+ goto err_free_ahash;
ctx->auth = auth;
ctx->enc = enc;
+
tfm->crt_aead.reqsize = max_t(unsigned int,
- (crypto_hash_alignmask(auth) &
- ~(crypto_tfm_ctx_alignment() - 1)) +
- digestsize * 2,
- sizeof(struct ablkcipher_request) +
- crypto_ablkcipher_reqsize(enc));
-
- spin_lock_init(&ctx->auth_lock);
+ crypto_ahash_reqsize(auth) + ctx->reqoff +
+ sizeof(struct authenc_request_ctx) +
+ sizeof(struct ahash_request),
+ sizeof(struct skcipher_givcrypt_request) +
+ crypto_ablkcipher_reqsize(enc) +
+ crypto_ablkcipher_ivsize(enc));
return 0;
-err_free_hash:
- crypto_free_hash(auth);
+err_free_ahash:
+ crypto_free_ahash(auth);
return err;
}
{
struct crypto_authenc_ctx *ctx = crypto_tfm_ctx(tfm);
- crypto_free_hash(ctx->auth);
+ crypto_free_ahash(ctx->auth);
crypto_free_ablkcipher(ctx->enc);
}
static struct crypto_instance *crypto_authenc_alloc(struct rtattr **tb)
{
+ struct crypto_attr_type *algt;
struct crypto_instance *inst;
- struct crypto_alg *auth;
+ struct hash_alg_common *auth;
+ struct crypto_alg *auth_base;
struct crypto_alg *enc;
struct authenc_instance_ctx *ctx;
- unsigned int authsize;
- unsigned int enckeylen;
+ const char *enc_name;
int err;
- err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD);
- if (err)
+ algt = crypto_get_attr_type(tb);
+ err = PTR_ERR(algt);
+ if (IS_ERR(algt))
return ERR_PTR(err);
- auth = crypto_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_HASH_MASK);
+ if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
+ return ERR_PTR(-EINVAL);
+
+ auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
+ CRYPTO_ALG_TYPE_AHASH_MASK);
if (IS_ERR(auth))
return ERR_PTR(PTR_ERR(auth));
- err = crypto_attr_u32(tb[2], &authsize);
- inst = ERR_PTR(err);
- if (err)
- goto out_put_auth;
+ auth_base = &auth->base;
- enc = crypto_attr_alg(tb[3], CRYPTO_ALG_TYPE_BLKCIPHER,
- CRYPTO_ALG_TYPE_MASK);
- inst = ERR_PTR(PTR_ERR(enc));
- if (IS_ERR(enc))
+ enc_name = crypto_attr_alg_name(tb[2]);
+ err = PTR_ERR(enc_name);
+ if (IS_ERR(enc_name))
goto out_put_auth;
- err = crypto_attr_u32(tb[4], &enckeylen);
- if (err)
- goto out_put_enc;
-
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
err = -ENOMEM;
if (!inst)
- goto out_put_enc;
-
- err = -ENAMETOOLONG;
- if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
- "authenc(%s,%u,%s,%u)", auth->cra_name, authsize,
- enc->cra_name, enckeylen) >= CRYPTO_MAX_ALG_NAME)
- goto err_free_inst;
-
- if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
- "authenc(%s,%u,%s,%u)", auth->cra_driver_name,
- authsize, enc->cra_driver_name, enckeylen) >=
- CRYPTO_MAX_ALG_NAME)
- goto err_free_inst;
+ goto out_put_auth;
ctx = crypto_instance_ctx(inst);
- ctx->authsize = authsize;
- ctx->enckeylen = enckeylen;
- err = crypto_init_spawn(&ctx->auth, auth, inst, CRYPTO_ALG_TYPE_MASK);
+ err = crypto_init_ahash_spawn(&ctx->auth, auth, inst);
if (err)
goto err_free_inst;
- err = crypto_init_spawn(&ctx->enc, enc, inst, CRYPTO_ALG_TYPE_MASK);
+ crypto_set_skcipher_spawn(&ctx->enc, inst);
+ err = crypto_grab_skcipher(&ctx->enc, enc_name, 0,
+ crypto_requires_sync(algt->type,
+ algt->mask));
if (err)
goto err_drop_auth;
- inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC;
- inst->alg.cra_priority = enc->cra_priority * 10 + auth->cra_priority;
+ enc = crypto_skcipher_spawn_alg(&ctx->enc);
+
+ err = -ENAMETOOLONG;
+ if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
+ "authenc(%s,%s)", auth_base->cra_name, enc->cra_name) >=
+ CRYPTO_MAX_ALG_NAME)
+ goto err_drop_enc;
+
+ if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+ "authenc(%s,%s)", auth_base->cra_driver_name,
+ enc->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
+ goto err_drop_enc;
+
+ inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
+ inst->alg.cra_flags |= enc->cra_flags & CRYPTO_ALG_ASYNC;
+ inst->alg.cra_priority = enc->cra_priority *
+ 10 + auth_base->cra_priority;
inst->alg.cra_blocksize = enc->cra_blocksize;
- inst->alg.cra_alignmask = max(auth->cra_alignmask, enc->cra_alignmask);
+ inst->alg.cra_alignmask = auth_base->cra_alignmask | enc->cra_alignmask;
inst->alg.cra_type = &crypto_aead_type;
- inst->alg.cra_aead.ivsize = enc->cra_blkcipher.ivsize;
- inst->alg.cra_aead.authsize = authsize;
+ inst->alg.cra_aead.ivsize = enc->cra_ablkcipher.ivsize;
+ inst->alg.cra_aead.maxauthsize = auth->digestsize;
inst->alg.cra_ctxsize = sizeof(struct crypto_authenc_ctx);
inst->alg.cra_aead.setkey = crypto_authenc_setkey;
inst->alg.cra_aead.encrypt = crypto_authenc_encrypt;
inst->alg.cra_aead.decrypt = crypto_authenc_decrypt;
+ inst->alg.cra_aead.givencrypt = crypto_authenc_givencrypt;
out:
- crypto_mod_put(enc);
-out_put_auth:
- crypto_mod_put(auth);
+ crypto_mod_put(auth_base);
return inst;
+err_drop_enc:
+ crypto_drop_skcipher(&ctx->enc);
err_drop_auth:
- crypto_drop_spawn(&ctx->auth);
+ crypto_drop_ahash(&ctx->auth);
err_free_inst:
kfree(inst);
-out_put_enc:
+out_put_auth:
inst = ERR_PTR(err);
goto out;
}
{
struct authenc_instance_ctx *ctx = crypto_instance_ctx(inst);
- crypto_drop_spawn(&ctx->enc);
- crypto_drop_spawn(&ctx->auth);
+ crypto_drop_skcipher(&ctx->enc);
+ crypto_drop_ahash(&ctx->auth);
kfree(inst);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff