crypto: ccm - Convert to new AEAD interface
This patch converts generic ccm and its associated transforms to the new AEAD interface. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Herbert Xu
parent
0bc5a6c5c7
commit
81c4c35eb6
386
crypto/ccm.c
386
crypto/ccm.c
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@ -36,14 +36,20 @@ struct crypto_rfc4309_ctx {
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u8 nonce[3];
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};
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struct crypto_rfc4309_req_ctx {
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struct scatterlist src[3];
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struct scatterlist dst[3];
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struct aead_request subreq;
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};
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struct crypto_ccm_req_priv_ctx {
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u8 odata[16];
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u8 idata[16];
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u8 auth_tag[16];
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u32 ilen;
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u32 flags;
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struct scatterlist src[2];
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struct scatterlist dst[2];
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struct scatterlist src[3];
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struct scatterlist dst[3];
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struct ablkcipher_request abreq;
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};
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@ -265,7 +271,7 @@ static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain,
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/* format associated data and compute into mac */
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if (assoclen) {
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pctx->ilen = format_adata(idata, assoclen);
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get_data_to_compute(cipher, pctx, req->assoc, req->assoclen);
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get_data_to_compute(cipher, pctx, req->src, req->assoclen);
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} else {
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pctx->ilen = 0;
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}
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@ -286,7 +292,8 @@ static void crypto_ccm_encrypt_done(struct crypto_async_request *areq, int err)
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u8 *odata = pctx->odata;
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if (!err)
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scatterwalk_map_and_copy(odata, req->dst, req->cryptlen,
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scatterwalk_map_and_copy(odata, req->dst,
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req->assoclen + req->cryptlen,
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crypto_aead_authsize(aead), 1);
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aead_request_complete(req, err);
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}
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@ -300,6 +307,41 @@ static inline int crypto_ccm_check_iv(const u8 *iv)
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return 0;
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}
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static int crypto_ccm_init_crypt(struct aead_request *req, u8 *tag)
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{
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struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
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struct scatterlist *sg;
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u8 *iv = req->iv;
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int err;
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err = crypto_ccm_check_iv(iv);
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if (err)
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return err;
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pctx->flags = aead_request_flags(req);
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/* Note: rfc 3610 and NIST 800-38C require counter of
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* zero to encrypt auth tag.
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*/
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memset(iv + 15 - iv[0], 0, iv[0] + 1);
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sg_init_table(pctx->src, 3);
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sg_set_buf(pctx->src, tag, 16);
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sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen);
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if (sg != pctx->src + 1)
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sg_chain(pctx->src, 2, sg);
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if (req->src != req->dst) {
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sg_init_table(pctx->dst, 3);
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sg_set_buf(pctx->dst, tag, 16);
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sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen);
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if (sg != pctx->dst + 1)
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sg_chain(pctx->dst, 2, sg);
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}
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return 0;
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}
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static int crypto_ccm_encrypt(struct aead_request *req)
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{
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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@ -312,32 +354,17 @@ static int crypto_ccm_encrypt(struct aead_request *req)
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u8 *iv = req->iv;
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int err;
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err = crypto_ccm_check_iv(iv);
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err = crypto_ccm_init_crypt(req, odata);
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if (err)
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return err;
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pctx->flags = aead_request_flags(req);
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err = crypto_ccm_auth(req, req->src, cryptlen);
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err = crypto_ccm_auth(req, sg_next(pctx->src), cryptlen);
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if (err)
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return err;
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/* Note: rfc 3610 and NIST 800-38C require counter of
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* zero to encrypt auth tag.
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*/
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memset(iv + 15 - iv[0], 0, iv[0] + 1);
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sg_init_table(pctx->src, 2);
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sg_set_buf(pctx->src, odata, 16);
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scatterwalk_sg_chain(pctx->src, 2, req->src);
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dst = pctx->src;
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if (req->src != req->dst) {
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sg_init_table(pctx->dst, 2);
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sg_set_buf(pctx->dst, odata, 16);
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scatterwalk_sg_chain(pctx->dst, 2, req->dst);
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if (req->src != req->dst)
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dst = pctx->dst;
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}
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ablkcipher_request_set_tfm(abreq, ctx->ctr);
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ablkcipher_request_set_callback(abreq, pctx->flags,
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@ -348,7 +375,7 @@ static int crypto_ccm_encrypt(struct aead_request *req)
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return err;
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/* copy authtag to end of dst */
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scatterwalk_map_and_copy(odata, req->dst, cryptlen,
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scatterwalk_map_and_copy(odata, sg_next(dst), cryptlen,
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crypto_aead_authsize(aead), 1);
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return err;
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}
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@ -361,9 +388,14 @@ static void crypto_ccm_decrypt_done(struct crypto_async_request *areq,
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struct crypto_aead *aead = crypto_aead_reqtfm(req);
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unsigned int authsize = crypto_aead_authsize(aead);
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unsigned int cryptlen = req->cryptlen - authsize;
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struct scatterlist *dst;
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pctx->flags = 0;
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dst = sg_next(req->src == req->dst ? pctx->src : pctx->dst);
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if (!err) {
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err = crypto_ccm_auth(req, req->dst, cryptlen);
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err = crypto_ccm_auth(req, dst, cryptlen);
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if (!err && crypto_memneq(pctx->auth_tag, pctx->odata, authsize))
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err = -EBADMSG;
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}
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@ -384,31 +416,18 @@ static int crypto_ccm_decrypt(struct aead_request *req)
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u8 *iv = req->iv;
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int err;
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if (cryptlen < authsize)
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return -EINVAL;
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cryptlen -= authsize;
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err = crypto_ccm_check_iv(iv);
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err = crypto_ccm_init_crypt(req, authtag);
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if (err)
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return err;
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pctx->flags = aead_request_flags(req);
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scatterwalk_map_and_copy(authtag, req->src, cryptlen, authsize, 0);
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memset(iv + 15 - iv[0], 0, iv[0] + 1);
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sg_init_table(pctx->src, 2);
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sg_set_buf(pctx->src, authtag, 16);
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scatterwalk_sg_chain(pctx->src, 2, req->src);
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scatterwalk_map_and_copy(authtag, sg_next(pctx->src), cryptlen,
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authsize, 0);
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dst = pctx->src;
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if (req->src != req->dst) {
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sg_init_table(pctx->dst, 2);
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sg_set_buf(pctx->dst, authtag, 16);
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scatterwalk_sg_chain(pctx->dst, 2, req->dst);
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if (req->src != req->dst)
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dst = pctx->dst;
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}
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ablkcipher_request_set_tfm(abreq, ctx->ctr);
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ablkcipher_request_set_callback(abreq, pctx->flags,
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@ -418,7 +437,7 @@ static int crypto_ccm_decrypt(struct aead_request *req)
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if (err)
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return err;
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err = crypto_ccm_auth(req, req->dst, cryptlen);
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err = crypto_ccm_auth(req, sg_next(dst), cryptlen);
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if (err)
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return err;
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@ -429,11 +448,11 @@ static int crypto_ccm_decrypt(struct aead_request *req)
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return err;
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}
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static int crypto_ccm_init_tfm(struct crypto_tfm *tfm)
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static int crypto_ccm_init_tfm(struct crypto_aead *tfm)
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{
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struct crypto_instance *inst = (void *)tfm->__crt_alg;
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struct ccm_instance_ctx *ictx = crypto_instance_ctx(inst);
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struct crypto_ccm_ctx *ctx = crypto_tfm_ctx(tfm);
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struct aead_instance *inst = aead_alg_instance(tfm);
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struct ccm_instance_ctx *ictx = aead_instance_ctx(inst);
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
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struct crypto_cipher *cipher;
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struct crypto_ablkcipher *ctr;
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unsigned long align;
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@ -451,9 +470,10 @@ static int crypto_ccm_init_tfm(struct crypto_tfm *tfm)
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ctx->cipher = cipher;
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ctx->ctr = ctr;
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align = crypto_tfm_alg_alignmask(tfm);
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align = crypto_aead_alignmask(tfm);
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align &= ~(crypto_tfm_ctx_alignment() - 1);
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crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
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crypto_aead_set_reqsize(
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tfm,
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align + sizeof(struct crypto_ccm_req_priv_ctx) +
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crypto_ablkcipher_reqsize(ctr));
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@ -464,21 +484,31 @@ static int crypto_ccm_init_tfm(struct crypto_tfm *tfm)
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return err;
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}
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static void crypto_ccm_exit_tfm(struct crypto_tfm *tfm)
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static void crypto_ccm_exit_tfm(struct crypto_aead *tfm)
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{
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struct crypto_ccm_ctx *ctx = crypto_tfm_ctx(tfm);
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struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
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crypto_free_cipher(ctx->cipher);
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crypto_free_ablkcipher(ctx->ctr);
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}
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static struct crypto_instance *crypto_ccm_alloc_common(struct rtattr **tb,
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const char *full_name,
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const char *ctr_name,
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const char *cipher_name)
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static void crypto_ccm_free(struct aead_instance *inst)
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{
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struct ccm_instance_ctx *ctx = aead_instance_ctx(inst);
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crypto_drop_spawn(&ctx->cipher);
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crypto_drop_skcipher(&ctx->ctr);
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kfree(inst);
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}
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static int crypto_ccm_create_common(struct crypto_template *tmpl,
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struct rtattr **tb,
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const char *full_name,
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const char *ctr_name,
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const char *cipher_name)
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{
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struct crypto_attr_type *algt;
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struct crypto_instance *inst;
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struct aead_instance *inst;
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struct crypto_alg *ctr;
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struct crypto_alg *cipher;
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struct ccm_instance_ctx *ictx;
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@ -486,15 +516,16 @@ static struct crypto_instance *crypto_ccm_alloc_common(struct rtattr **tb,
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algt = crypto_get_attr_type(tb);
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if (IS_ERR(algt))
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return ERR_CAST(algt);
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return PTR_ERR(algt);
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if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
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return ERR_PTR(-EINVAL);
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if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_AEAD_NEW)) &
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algt->mask)
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return -EINVAL;
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cipher = crypto_alg_mod_lookup(cipher_name, CRYPTO_ALG_TYPE_CIPHER,
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CRYPTO_ALG_TYPE_MASK);
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if (IS_ERR(cipher))
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return ERR_CAST(cipher);
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return PTR_ERR(cipher);
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err = -EINVAL;
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if (cipher->cra_blocksize != 16)
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@ -505,14 +536,15 @@ static struct crypto_instance *crypto_ccm_alloc_common(struct rtattr **tb,
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if (!inst)
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goto out_put_cipher;
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ictx = crypto_instance_ctx(inst);
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ictx = aead_instance_ctx(inst);
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err = crypto_init_spawn(&ictx->cipher, cipher, inst,
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err = crypto_init_spawn(&ictx->cipher, cipher,
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aead_crypto_instance(inst),
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CRYPTO_ALG_TYPE_MASK);
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if (err)
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goto err_free_inst;
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crypto_set_skcipher_spawn(&ictx->ctr, inst);
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crypto_set_skcipher_spawn(&ictx->ctr, aead_crypto_instance(inst));
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err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0,
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crypto_requires_sync(algt->type,
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algt->mask));
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@ -531,33 +563,40 @@ static struct crypto_instance *crypto_ccm_alloc_common(struct rtattr **tb,
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goto err_drop_ctr;
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err = -ENAMETOOLONG;
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if (snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
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if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
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"ccm_base(%s,%s)", ctr->cra_driver_name,
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cipher->cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
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goto err_drop_ctr;
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memcpy(inst->alg.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
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memcpy(inst->alg.base.cra_name, full_name, CRYPTO_MAX_ALG_NAME);
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inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
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inst->alg.cra_flags |= ctr->cra_flags & CRYPTO_ALG_ASYNC;
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inst->alg.cra_priority = cipher->cra_priority + ctr->cra_priority;
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inst->alg.cra_blocksize = 1;
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inst->alg.cra_alignmask = cipher->cra_alignmask | ctr->cra_alignmask |
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(__alignof__(u32) - 1);
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inst->alg.cra_type = &crypto_aead_type;
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inst->alg.cra_aead.ivsize = 16;
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inst->alg.cra_aead.maxauthsize = 16;
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inst->alg.cra_ctxsize = sizeof(struct crypto_ccm_ctx);
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inst->alg.cra_init = crypto_ccm_init_tfm;
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inst->alg.cra_exit = crypto_ccm_exit_tfm;
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inst->alg.cra_aead.setkey = crypto_ccm_setkey;
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inst->alg.cra_aead.setauthsize = crypto_ccm_setauthsize;
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inst->alg.cra_aead.encrypt = crypto_ccm_encrypt;
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inst->alg.cra_aead.decrypt = crypto_ccm_decrypt;
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inst->alg.base.cra_flags = ctr->cra_flags & CRYPTO_ALG_ASYNC;
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inst->alg.base.cra_flags |= CRYPTO_ALG_AEAD_NEW;
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inst->alg.base.cra_priority = (cipher->cra_priority +
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ctr->cra_priority) / 2;
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inst->alg.base.cra_blocksize = 1;
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inst->alg.base.cra_alignmask = cipher->cra_alignmask |
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ctr->cra_alignmask |
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(__alignof__(u32) - 1);
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inst->alg.ivsize = 16;
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inst->alg.maxauthsize = 16;
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inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx);
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inst->alg.init = crypto_ccm_init_tfm;
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inst->alg.exit = crypto_ccm_exit_tfm;
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inst->alg.setkey = crypto_ccm_setkey;
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inst->alg.setauthsize = crypto_ccm_setauthsize;
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inst->alg.encrypt = crypto_ccm_encrypt;
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inst->alg.decrypt = crypto_ccm_decrypt;
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out:
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inst->free = crypto_ccm_free;
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err = aead_register_instance(tmpl, inst);
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if (err)
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goto err_drop_ctr;
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out_put_cipher:
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crypto_mod_put(cipher);
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return inst;
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return err;
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err_drop_ctr:
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crypto_drop_skcipher(&ictx->ctr);
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@ -565,12 +604,10 @@ static struct crypto_instance *crypto_ccm_alloc_common(struct rtattr **tb,
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crypto_drop_spawn(&ictx->cipher);
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err_free_inst:
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kfree(inst);
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out_put_cipher:
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inst = ERR_PTR(err);
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goto out;
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goto out_put_cipher;
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}
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static struct crypto_instance *crypto_ccm_alloc(struct rtattr **tb)
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static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb)
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{
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const char *cipher_name;
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char ctr_name[CRYPTO_MAX_ALG_NAME];
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@ -578,36 +615,28 @@ static struct crypto_instance *crypto_ccm_alloc(struct rtattr **tb)
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cipher_name = crypto_attr_alg_name(tb[1]);
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if (IS_ERR(cipher_name))
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return ERR_CAST(cipher_name);
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return PTR_ERR(cipher_name);
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if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)",
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cipher_name) >= CRYPTO_MAX_ALG_NAME)
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return ERR_PTR(-ENAMETOOLONG);
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return -ENAMETOOLONG;
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if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "ccm(%s)", cipher_name) >=
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CRYPTO_MAX_ALG_NAME)
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return ERR_PTR(-ENAMETOOLONG);
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return -ENAMETOOLONG;
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return crypto_ccm_alloc_common(tb, full_name, ctr_name, cipher_name);
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}
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static void crypto_ccm_free(struct crypto_instance *inst)
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{
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struct ccm_instance_ctx *ctx = crypto_instance_ctx(inst);
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crypto_drop_spawn(&ctx->cipher);
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crypto_drop_skcipher(&ctx->ctr);
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kfree(inst);
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return crypto_ccm_create_common(tmpl, tb, full_name, ctr_name,
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cipher_name);
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}
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static struct crypto_template crypto_ccm_tmpl = {
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.name = "ccm",
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.alloc = crypto_ccm_alloc,
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.free = crypto_ccm_free,
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.create = crypto_ccm_create,
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.module = THIS_MODULE,
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};
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||||
static struct crypto_instance *crypto_ccm_base_alloc(struct rtattr **tb)
|
||||
static int crypto_ccm_base_create(struct crypto_template *tmpl,
|
||||
struct rtattr **tb)
|
||||
{
|
||||
const char *ctr_name;
|
||||
const char *cipher_name;
|
||||
|
|
@ -615,23 +644,23 @@ static struct crypto_instance *crypto_ccm_base_alloc(struct rtattr **tb)
|
|||
|
||||
ctr_name = crypto_attr_alg_name(tb[1]);
|
||||
if (IS_ERR(ctr_name))
|
||||
return ERR_CAST(ctr_name);
|
||||
return PTR_ERR(ctr_name);
|
||||
|
||||
cipher_name = crypto_attr_alg_name(tb[2]);
|
||||
if (IS_ERR(cipher_name))
|
||||
return ERR_CAST(cipher_name);
|
||||
return PTR_ERR(cipher_name);
|
||||
|
||||
if (snprintf(full_name, CRYPTO_MAX_ALG_NAME, "ccm_base(%s,%s)",
|
||||
ctr_name, cipher_name) >= CRYPTO_MAX_ALG_NAME)
|
||||
return ERR_PTR(-ENAMETOOLONG);
|
||||
return -ENAMETOOLONG;
|
||||
|
||||
return crypto_ccm_alloc_common(tb, full_name, ctr_name, cipher_name);
|
||||
return crypto_ccm_create_common(tmpl, tb, full_name, ctr_name,
|
||||
cipher_name);
|
||||
}
|
||||
|
||||
static struct crypto_template crypto_ccm_base_tmpl = {
|
||||
.name = "ccm_base",
|
||||
.alloc = crypto_ccm_base_alloc,
|
||||
.free = crypto_ccm_free,
|
||||
.create = crypto_ccm_base_create,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
|
|
@ -677,10 +706,12 @@ static int crypto_rfc4309_setauthsize(struct crypto_aead *parent,
|
|||
|
||||
static struct aead_request *crypto_rfc4309_crypt(struct aead_request *req)
|
||||
{
|
||||
struct aead_request *subreq = aead_request_ctx(req);
|
||||
struct crypto_rfc4309_req_ctx *rctx = aead_request_ctx(req);
|
||||
struct aead_request *subreq = &rctx->subreq;
|
||||
struct crypto_aead *aead = crypto_aead_reqtfm(req);
|
||||
struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(aead);
|
||||
struct crypto_aead *child = ctx->child;
|
||||
struct scatterlist *sg;
|
||||
u8 *iv = PTR_ALIGN((u8 *)(subreq + 1) + crypto_aead_reqsize(child),
|
||||
crypto_aead_alignmask(child) + 1);
|
||||
|
||||
|
|
@ -690,17 +721,38 @@ static struct aead_request *crypto_rfc4309_crypt(struct aead_request *req)
|
|||
memcpy(iv + 1, ctx->nonce, 3);
|
||||
memcpy(iv + 4, req->iv, 8);
|
||||
|
||||
scatterwalk_map_and_copy(iv + 16, req->src, 0, req->assoclen - 8, 0);
|
||||
|
||||
sg_init_table(rctx->src, 3);
|
||||
sg_set_buf(rctx->src, iv + 16, req->assoclen - 8);
|
||||
sg = scatterwalk_ffwd(rctx->src + 1, req->src, req->assoclen);
|
||||
if (sg != rctx->src + 1)
|
||||
sg_chain(rctx->src, 2, sg);
|
||||
|
||||
if (req->src != req->dst) {
|
||||
sg_init_table(rctx->dst, 3);
|
||||
sg_set_buf(rctx->dst, iv + 16, req->assoclen - 8);
|
||||
sg = scatterwalk_ffwd(rctx->dst + 1, req->dst, req->assoclen);
|
||||
if (sg != rctx->dst + 1)
|
||||
sg_chain(rctx->dst, 2, sg);
|
||||
}
|
||||
|
||||
aead_request_set_tfm(subreq, child);
|
||||
aead_request_set_callback(subreq, req->base.flags, req->base.complete,
|
||||
req->base.data);
|
||||
aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, iv);
|
||||
aead_request_set_assoc(subreq, req->assoc, req->assoclen);
|
||||
aead_request_set_crypt(subreq, rctx->src,
|
||||
req->src == req->dst ? rctx->src : rctx->dst,
|
||||
req->cryptlen, iv);
|
||||
aead_request_set_ad(subreq, req->assoclen - 8);
|
||||
|
||||
return subreq;
|
||||
}
|
||||
|
||||
static int crypto_rfc4309_encrypt(struct aead_request *req)
|
||||
{
|
||||
if (req->assoclen != 16 && req->assoclen != 20)
|
||||
return -EINVAL;
|
||||
|
||||
req = crypto_rfc4309_crypt(req);
|
||||
|
||||
return crypto_aead_encrypt(req);
|
||||
|
|
@ -708,16 +760,19 @@ static int crypto_rfc4309_encrypt(struct aead_request *req)
|
|||
|
||||
static int crypto_rfc4309_decrypt(struct aead_request *req)
|
||||
{
|
||||
if (req->assoclen != 16 && req->assoclen != 20)
|
||||
return -EINVAL;
|
||||
|
||||
req = crypto_rfc4309_crypt(req);
|
||||
|
||||
return crypto_aead_decrypt(req);
|
||||
}
|
||||
|
||||
static int crypto_rfc4309_init_tfm(struct crypto_tfm *tfm)
|
||||
static int crypto_rfc4309_init_tfm(struct crypto_aead *tfm)
|
||||
{
|
||||
struct crypto_instance *inst = (void *)tfm->__crt_alg;
|
||||
struct crypto_aead_spawn *spawn = crypto_instance_ctx(inst);
|
||||
struct crypto_rfc4309_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct aead_instance *inst = aead_alg_instance(tfm);
|
||||
struct crypto_aead_spawn *spawn = aead_instance_ctx(inst);
|
||||
struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm);
|
||||
struct crypto_aead *aead;
|
||||
unsigned long align;
|
||||
|
||||
|
|
@ -729,115 +784,120 @@ static int crypto_rfc4309_init_tfm(struct crypto_tfm *tfm)
|
|||
|
||||
align = crypto_aead_alignmask(aead);
|
||||
align &= ~(crypto_tfm_ctx_alignment() - 1);
|
||||
crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
|
||||
sizeof(struct aead_request) +
|
||||
crypto_aead_set_reqsize(
|
||||
tfm,
|
||||
sizeof(struct crypto_rfc4309_req_ctx) +
|
||||
ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
|
||||
align + 16);
|
||||
align + 32);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void crypto_rfc4309_exit_tfm(struct crypto_tfm *tfm)
|
||||
static void crypto_rfc4309_exit_tfm(struct crypto_aead *tfm)
|
||||
{
|
||||
struct crypto_rfc4309_ctx *ctx = crypto_tfm_ctx(tfm);
|
||||
struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm);
|
||||
|
||||
crypto_free_aead(ctx->child);
|
||||
}
|
||||
|
||||
static struct crypto_instance *crypto_rfc4309_alloc(struct rtattr **tb)
|
||||
static void crypto_rfc4309_free(struct aead_instance *inst)
|
||||
{
|
||||
crypto_drop_aead(aead_instance_ctx(inst));
|
||||
kfree(inst);
|
||||
}
|
||||
|
||||
static int crypto_rfc4309_create(struct crypto_template *tmpl,
|
||||
struct rtattr **tb)
|
||||
{
|
||||
struct crypto_attr_type *algt;
|
||||
struct crypto_instance *inst;
|
||||
struct aead_instance *inst;
|
||||
struct crypto_aead_spawn *spawn;
|
||||
struct crypto_alg *alg;
|
||||
struct aead_alg *alg;
|
||||
const char *ccm_name;
|
||||
int err;
|
||||
|
||||
algt = crypto_get_attr_type(tb);
|
||||
if (IS_ERR(algt))
|
||||
return ERR_CAST(algt);
|
||||
return PTR_ERR(algt);
|
||||
|
||||
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
|
||||
return ERR_PTR(-EINVAL);
|
||||
if ((algt->type ^ (CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_AEAD_NEW)) &
|
||||
algt->mask)
|
||||
return -EINVAL;
|
||||
|
||||
ccm_name = crypto_attr_alg_name(tb[1]);
|
||||
if (IS_ERR(ccm_name))
|
||||
return ERR_CAST(ccm_name);
|
||||
return PTR_ERR(ccm_name);
|
||||
|
||||
inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
|
||||
if (!inst)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
return -ENOMEM;
|
||||
|
||||
spawn = crypto_instance_ctx(inst);
|
||||
crypto_set_aead_spawn(spawn, inst);
|
||||
spawn = aead_instance_ctx(inst);
|
||||
crypto_set_aead_spawn(spawn, aead_crypto_instance(inst));
|
||||
err = crypto_grab_aead(spawn, ccm_name, 0,
|
||||
crypto_requires_sync(algt->type, algt->mask));
|
||||
if (err)
|
||||
goto out_free_inst;
|
||||
|
||||
alg = crypto_aead_spawn_alg(spawn);
|
||||
alg = crypto_spawn_aead_alg(spawn);
|
||||
|
||||
err = -EINVAL;
|
||||
|
||||
/* We only support 16-byte blocks. */
|
||||
if (alg->cra_aead.ivsize != 16)
|
||||
if (crypto_aead_alg_ivsize(alg) != 16)
|
||||
goto out_drop_alg;
|
||||
|
||||
/* Not a stream cipher? */
|
||||
if (alg->cra_blocksize != 1)
|
||||
if (alg->base.cra_blocksize != 1)
|
||||
goto out_drop_alg;
|
||||
|
||||
err = -ENAMETOOLONG;
|
||||
if (snprintf(inst->alg.cra_name, CRYPTO_MAX_ALG_NAME,
|
||||
"rfc4309(%s)", alg->cra_name) >= CRYPTO_MAX_ALG_NAME ||
|
||||
snprintf(inst->alg.cra_driver_name, CRYPTO_MAX_ALG_NAME,
|
||||
"rfc4309(%s)", alg->cra_driver_name) >=
|
||||
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
|
||||
"rfc4309(%s)", alg->base.cra_name) >=
|
||||
CRYPTO_MAX_ALG_NAME ||
|
||||
snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
|
||||
"rfc4309(%s)", alg->base.cra_driver_name) >=
|
||||
CRYPTO_MAX_ALG_NAME)
|
||||
goto out_drop_alg;
|
||||
|
||||
inst->alg.cra_flags = CRYPTO_ALG_TYPE_AEAD;
|
||||
inst->alg.cra_flags |= alg->cra_flags & CRYPTO_ALG_ASYNC;
|
||||
inst->alg.cra_priority = alg->cra_priority;
|
||||
inst->alg.cra_blocksize = 1;
|
||||
inst->alg.cra_alignmask = alg->cra_alignmask;
|
||||
inst->alg.cra_type = &crypto_nivaead_type;
|
||||
inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
|
||||
inst->alg.base.cra_flags |= CRYPTO_ALG_AEAD_NEW;
|
||||
inst->alg.base.cra_priority = alg->base.cra_priority;
|
||||
inst->alg.base.cra_blocksize = 1;
|
||||
inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
|
||||
|
||||
inst->alg.cra_aead.ivsize = 8;
|
||||
inst->alg.cra_aead.maxauthsize = 16;
|
||||
inst->alg.ivsize = 8;
|
||||
inst->alg.maxauthsize = 16;
|
||||
|
||||
inst->alg.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);
|
||||
inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);
|
||||
|
||||
inst->alg.cra_init = crypto_rfc4309_init_tfm;
|
||||
inst->alg.cra_exit = crypto_rfc4309_exit_tfm;
|
||||
inst->alg.init = crypto_rfc4309_init_tfm;
|
||||
inst->alg.exit = crypto_rfc4309_exit_tfm;
|
||||
|
||||
inst->alg.cra_aead.setkey = crypto_rfc4309_setkey;
|
||||
inst->alg.cra_aead.setauthsize = crypto_rfc4309_setauthsize;
|
||||
inst->alg.cra_aead.encrypt = crypto_rfc4309_encrypt;
|
||||
inst->alg.cra_aead.decrypt = crypto_rfc4309_decrypt;
|
||||
inst->alg.setkey = crypto_rfc4309_setkey;
|
||||
inst->alg.setauthsize = crypto_rfc4309_setauthsize;
|
||||
inst->alg.encrypt = crypto_rfc4309_encrypt;
|
||||
inst->alg.decrypt = crypto_rfc4309_decrypt;
|
||||
|
||||
inst->alg.cra_aead.geniv = "seqiv";
|
||||
inst->free = crypto_rfc4309_free;
|
||||
|
||||
err = aead_register_instance(tmpl, inst);
|
||||
if (err)
|
||||
goto out_drop_alg;
|
||||
|
||||
out:
|
||||
return inst;
|
||||
return err;
|
||||
|
||||
out_drop_alg:
|
||||
crypto_drop_aead(spawn);
|
||||
out_free_inst:
|
||||
kfree(inst);
|
||||
inst = ERR_PTR(err);
|
||||
goto out;
|
||||
}
|
||||
|
||||
static void crypto_rfc4309_free(struct crypto_instance *inst)
|
||||
{
|
||||
crypto_drop_spawn(crypto_instance_ctx(inst));
|
||||
kfree(inst);
|
||||
}
|
||||
|
||||
static struct crypto_template crypto_rfc4309_tmpl = {
|
||||
.name = "rfc4309",
|
||||
.alloc = crypto_rfc4309_alloc,
|
||||
.free = crypto_rfc4309_free,
|
||||
.create = crypto_rfc4309_create,
|
||||
.module = THIS_MODULE,
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue