crypto: ixp4xx - Convert to new AEAD interface
This patch converts ixp4xx to the new AEAD interface. IV generation has been removed since it's a purely software implementation. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>hifive-unleashed-5.1
Herbert Xu
parent
479bcc7c5b
commit
d7295a8dc9
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@ -156,7 +156,8 @@ struct ablk_ctx {
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};
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struct aead_ctx {
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struct buffer_desc *buffer;
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struct buffer_desc *src;
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struct buffer_desc *dst;
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struct scatterlist ivlist;
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/* used when the hmac is not on one sg entry */
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u8 *hmac_virt;
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@ -198,6 +199,15 @@ struct ixp_alg {
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int registered;
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};
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struct ixp_aead_alg {
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struct aead_alg crypto;
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const struct ix_hash_algo *hash;
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u32 cfg_enc;
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u32 cfg_dec;
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int registered;
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};
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static const struct ix_hash_algo hash_alg_md5 = {
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.cfgword = 0xAA010004,
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.icv = "\x01\x23\x45\x67\x89\xAB\xCD\xEF"
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@ -339,11 +349,11 @@ static void finish_scattered_hmac(struct crypt_ctl *crypt)
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struct aead_ctx *req_ctx = aead_request_ctx(req);
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struct crypto_aead *tfm = crypto_aead_reqtfm(req);
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int authsize = crypto_aead_authsize(tfm);
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int decryptlen = req->cryptlen - authsize;
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int decryptlen = req->assoclen + req->cryptlen - authsize;
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if (req_ctx->encrypt) {
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scatterwalk_map_and_copy(req_ctx->hmac_virt,
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req->src, decryptlen, authsize, 1);
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req->dst, decryptlen, authsize, 1);
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}
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dma_pool_free(buffer_pool, req_ctx->hmac_virt, crypt->icv_rev_aes);
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}
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@ -364,7 +374,8 @@ static void one_packet(dma_addr_t phys)
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struct aead_request *req = crypt->data.aead_req;
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struct aead_ctx *req_ctx = aead_request_ctx(req);
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free_buf_chain(dev, req_ctx->buffer, crypt->src_buf);
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free_buf_chain(dev, req_ctx->src, crypt->src_buf);
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free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
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if (req_ctx->hmac_virt) {
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finish_scattered_hmac(crypt);
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}
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@ -573,11 +584,10 @@ static int init_tfm_ablk(struct crypto_tfm *tfm)
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return init_tfm(tfm);
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}
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static int init_tfm_aead(struct crypto_tfm *tfm)
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static int init_tfm_aead(struct crypto_aead *tfm)
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{
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crypto_aead_set_reqsize(__crypto_aead_cast(tfm),
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sizeof(struct aead_ctx));
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return init_tfm(tfm);
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crypto_aead_set_reqsize(tfm, sizeof(struct aead_ctx));
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return init_tfm(crypto_aead_tfm(tfm));
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}
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static void exit_tfm(struct crypto_tfm *tfm)
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@ -587,6 +597,11 @@ static void exit_tfm(struct crypto_tfm *tfm)
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free_sa_dir(&ctx->decrypt);
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}
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static void exit_tfm_aead(struct crypto_aead *tfm)
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{
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exit_tfm(crypto_aead_tfm(tfm));
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}
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static int register_chain_var(struct crypto_tfm *tfm, u8 xpad, u32 target,
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int init_len, u32 ctx_addr, const u8 *key, int key_len)
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{
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@ -969,24 +984,6 @@ static int ablk_rfc3686_crypt(struct ablkcipher_request *req)
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return ret;
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}
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static int hmac_inconsistent(struct scatterlist *sg, unsigned start,
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unsigned int nbytes)
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{
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int offset = 0;
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if (!nbytes)
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return 0;
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for (;;) {
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if (start < offset + sg->length)
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break;
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offset += sg->length;
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sg = sg_next(sg);
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}
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return (start + nbytes > offset + sg->length);
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}
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static int aead_perform(struct aead_request *req, int encrypt,
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int cryptoffset, int eff_cryptlen, u8 *iv)
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{
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@ -1002,6 +999,8 @@ static int aead_perform(struct aead_request *req, int encrypt,
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struct device *dev = &pdev->dev;
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gfp_t flags = req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
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GFP_KERNEL : GFP_ATOMIC;
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enum dma_data_direction src_direction = DMA_BIDIRECTIONAL;
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unsigned int lastlen;
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if (qmgr_stat_full(SEND_QID))
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return -EAGAIN;
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@ -1030,35 +1029,55 @@ static int aead_perform(struct aead_request *req, int encrypt,
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crypt->crypt_len = eff_cryptlen;
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crypt->auth_offs = 0;
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crypt->auth_len = req->assoclen + ivsize + cryptlen;
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crypt->auth_len = req->assoclen + cryptlen;
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BUG_ON(ivsize && !req->iv);
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memcpy(crypt->iv, req->iv, ivsize);
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req_ctx->dst = NULL;
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if (req->src != req->dst) {
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BUG(); /* -ENOTSUP because of my laziness */
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struct buffer_desc dst_hook;
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crypt->mode |= NPE_OP_NOT_IN_PLACE;
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src_direction = DMA_TO_DEVICE;
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buf = chainup_buffers(dev, req->dst, crypt->auth_len,
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&dst_hook, flags, DMA_FROM_DEVICE);
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req_ctx->dst = dst_hook.next;
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crypt->dst_buf = dst_hook.phys_next;
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if (!buf)
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goto free_buf_dst;
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if (encrypt) {
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lastlen = buf->buf_len;
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if (lastlen >= authsize)
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crypt->icv_rev_aes = buf->phys_addr +
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buf->buf_len - authsize;
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}
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}
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/* ASSOC data */
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buf = chainup_buffers(dev, req->assoc, req->assoclen, &src_hook,
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flags, DMA_TO_DEVICE);
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req_ctx->buffer = src_hook.next;
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buf = chainup_buffers(dev, req->src, crypt->auth_len,
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&src_hook, flags, src_direction);
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req_ctx->src = src_hook.next;
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crypt->src_buf = src_hook.phys_next;
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if (!buf)
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goto out;
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/* IV */
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sg_init_table(&req_ctx->ivlist, 1);
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sg_set_buf(&req_ctx->ivlist, iv, ivsize);
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buf = chainup_buffers(dev, &req_ctx->ivlist, ivsize, buf, flags,
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DMA_BIDIRECTIONAL);
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if (!buf)
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goto free_chain;
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if (unlikely(hmac_inconsistent(req->src, cryptlen, authsize))) {
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goto free_buf_src;
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if (!encrypt || !req_ctx->dst) {
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lastlen = buf->buf_len;
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if (lastlen >= authsize)
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crypt->icv_rev_aes = buf->phys_addr +
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buf->buf_len - authsize;
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}
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if (unlikely(lastlen < authsize)) {
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/* The 12 hmac bytes are scattered,
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* we need to copy them into a safe buffer */
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req_ctx->hmac_virt = dma_pool_alloc(buffer_pool, flags,
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&crypt->icv_rev_aes);
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if (unlikely(!req_ctx->hmac_virt))
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goto free_chain;
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goto free_buf_src;
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if (!encrypt) {
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scatterwalk_map_and_copy(req_ctx->hmac_virt,
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req->src, cryptlen, authsize, 0);
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@ -1067,27 +1086,16 @@ static int aead_perform(struct aead_request *req, int encrypt,
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} else {
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req_ctx->hmac_virt = NULL;
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}
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/* Crypt */
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buf = chainup_buffers(dev, req->src, cryptlen + authsize, buf, flags,
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DMA_BIDIRECTIONAL);
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if (!buf)
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goto free_hmac_virt;
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if (!req_ctx->hmac_virt) {
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crypt->icv_rev_aes = buf->phys_addr + buf->buf_len - authsize;
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}
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crypt->ctl_flags |= CTL_FLAG_PERFORM_AEAD;
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qmgr_put_entry(SEND_QID, crypt_virt2phys(crypt));
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BUG_ON(qmgr_stat_overflow(SEND_QID));
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return -EINPROGRESS;
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free_hmac_virt:
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if (req_ctx->hmac_virt) {
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dma_pool_free(buffer_pool, req_ctx->hmac_virt,
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crypt->icv_rev_aes);
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}
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free_chain:
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free_buf_chain(dev, req_ctx->buffer, crypt->src_buf);
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out:
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free_buf_src:
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free_buf_chain(dev, req_ctx->src, crypt->src_buf);
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free_buf_dst:
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free_buf_chain(dev, req_ctx->dst, crypt->dst_buf);
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crypt->ctl_flags = CTL_FLAG_UNUSED;
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return -ENOMEM;
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}
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@ -1173,40 +1181,12 @@ badkey:
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static int aead_encrypt(struct aead_request *req)
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{
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unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req));
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return aead_perform(req, 1, req->assoclen + ivsize,
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req->cryptlen, req->iv);
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return aead_perform(req, 1, req->assoclen, req->cryptlen, req->iv);
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}
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static int aead_decrypt(struct aead_request *req)
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{
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unsigned ivsize = crypto_aead_ivsize(crypto_aead_reqtfm(req));
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return aead_perform(req, 0, req->assoclen + ivsize,
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req->cryptlen, req->iv);
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}
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static int aead_givencrypt(struct aead_givcrypt_request *req)
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{
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struct crypto_aead *tfm = aead_givcrypt_reqtfm(req);
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struct ixp_ctx *ctx = crypto_aead_ctx(tfm);
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unsigned len, ivsize = crypto_aead_ivsize(tfm);
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__be64 seq;
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/* copied from eseqiv.c */
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if (!ctx->salted) {
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get_random_bytes(ctx->salt, ivsize);
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ctx->salted = 1;
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}
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memcpy(req->areq.iv, ctx->salt, ivsize);
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len = ivsize;
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if (ivsize > sizeof(u64)) {
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memset(req->giv, 0, ivsize - sizeof(u64));
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len = sizeof(u64);
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}
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seq = cpu_to_be64(req->seq);
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memcpy(req->giv + ivsize - len, &seq, len);
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return aead_perform(&req->areq, 1, req->areq.assoclen,
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req->areq.cryptlen +ivsize, req->giv);
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return aead_perform(req, 0, req->assoclen, req->cryptlen, req->iv);
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}
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static struct ixp_alg ixp4xx_algos[] = {
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@ -1319,80 +1299,77 @@ static struct ixp_alg ixp4xx_algos[] = {
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},
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.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CTR,
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.cfg_dec = CIPH_ENCR | MOD_AES | MOD_CTR,
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}, {
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} };
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static struct ixp_aead_alg ixp4xx_aeads[] = {
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{
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.crypto = {
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.cra_name = "authenc(hmac(md5),cbc(des))",
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.cra_blocksize = DES_BLOCK_SIZE,
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.cra_u = { .aead = {
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.ivsize = DES_BLOCK_SIZE,
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.maxauthsize = MD5_DIGEST_SIZE,
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}
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}
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.base = {
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.cra_name = "authenc(hmac(md5),cbc(des))",
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.cra_blocksize = DES_BLOCK_SIZE,
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},
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.ivsize = DES_BLOCK_SIZE,
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.maxauthsize = MD5_DIGEST_SIZE,
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},
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.hash = &hash_alg_md5,
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.cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
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.cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
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}, {
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.crypto = {
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.cra_name = "authenc(hmac(md5),cbc(des3_ede))",
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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.cra_u = { .aead = {
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.ivsize = DES3_EDE_BLOCK_SIZE,
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.maxauthsize = MD5_DIGEST_SIZE,
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}
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}
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.base = {
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.cra_name = "authenc(hmac(md5),cbc(des3_ede))",
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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},
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.ivsize = DES3_EDE_BLOCK_SIZE,
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.maxauthsize = MD5_DIGEST_SIZE,
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},
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.hash = &hash_alg_md5,
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.cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
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.cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
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}, {
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.crypto = {
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.cra_name = "authenc(hmac(sha1),cbc(des))",
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.cra_blocksize = DES_BLOCK_SIZE,
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.cra_u = { .aead = {
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.base = {
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.cra_name = "authenc(hmac(sha1),cbc(des))",
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.cra_blocksize = DES_BLOCK_SIZE,
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},
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.ivsize = DES_BLOCK_SIZE,
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.maxauthsize = SHA1_DIGEST_SIZE,
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}
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}
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},
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.hash = &hash_alg_sha1,
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.cfg_enc = CIPH_ENCR | MOD_DES | MOD_CBC_ENC | KEYLEN_192,
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.cfg_dec = CIPH_DECR | MOD_DES | MOD_CBC_DEC | KEYLEN_192,
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}, {
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.crypto = {
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.cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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.cra_u = { .aead = {
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.ivsize = DES3_EDE_BLOCK_SIZE,
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.maxauthsize = SHA1_DIGEST_SIZE,
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}
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}
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.base = {
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.cra_name = "authenc(hmac(sha1),cbc(des3_ede))",
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.cra_blocksize = DES3_EDE_BLOCK_SIZE,
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},
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.ivsize = DES3_EDE_BLOCK_SIZE,
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.maxauthsize = SHA1_DIGEST_SIZE,
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},
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.hash = &hash_alg_sha1,
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.cfg_enc = CIPH_ENCR | MOD_3DES | MOD_CBC_ENC | KEYLEN_192,
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.cfg_dec = CIPH_DECR | MOD_3DES | MOD_CBC_DEC | KEYLEN_192,
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}, {
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.crypto = {
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.cra_name = "authenc(hmac(md5),cbc(aes))",
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_u = { .aead = {
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.ivsize = AES_BLOCK_SIZE,
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.maxauthsize = MD5_DIGEST_SIZE,
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}
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}
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.base = {
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.cra_name = "authenc(hmac(md5),cbc(aes))",
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.cra_blocksize = AES_BLOCK_SIZE,
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},
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.ivsize = AES_BLOCK_SIZE,
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.maxauthsize = MD5_DIGEST_SIZE,
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},
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.hash = &hash_alg_md5,
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.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
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.cfg_dec = CIPH_DECR | MOD_AES | MOD_CBC_DEC,
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}, {
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.crypto = {
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.cra_name = "authenc(hmac(sha1),cbc(aes))",
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.cra_blocksize = AES_BLOCK_SIZE,
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.cra_u = { .aead = {
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.ivsize = AES_BLOCK_SIZE,
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.maxauthsize = SHA1_DIGEST_SIZE,
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}
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}
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.base = {
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.cra_name = "authenc(hmac(sha1),cbc(aes))",
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.cra_blocksize = AES_BLOCK_SIZE,
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},
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.ivsize = AES_BLOCK_SIZE,
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.maxauthsize = SHA1_DIGEST_SIZE,
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},
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.hash = &hash_alg_sha1,
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.cfg_enc = CIPH_ENCR | MOD_AES | MOD_CBC_ENC,
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@ -1436,32 +1413,20 @@ static int __init ixp_module_init(void)
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if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES)) {
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continue;
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}
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if (!ixp4xx_algos[i].hash) {
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/* block ciphers */
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cra->cra_type = &crypto_ablkcipher_type;
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cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
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CRYPTO_ALG_KERN_DRIVER_ONLY |
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CRYPTO_ALG_ASYNC;
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if (!cra->cra_ablkcipher.setkey)
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cra->cra_ablkcipher.setkey = ablk_setkey;
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if (!cra->cra_ablkcipher.encrypt)
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cra->cra_ablkcipher.encrypt = ablk_encrypt;
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if (!cra->cra_ablkcipher.decrypt)
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cra->cra_ablkcipher.decrypt = ablk_decrypt;
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cra->cra_init = init_tfm_ablk;
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} else {
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/* authenc */
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cra->cra_type = &crypto_aead_type;
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cra->cra_flags = CRYPTO_ALG_TYPE_AEAD |
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CRYPTO_ALG_KERN_DRIVER_ONLY |
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CRYPTO_ALG_ASYNC;
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cra->cra_aead.setkey = aead_setkey;
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cra->cra_aead.setauthsize = aead_setauthsize;
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cra->cra_aead.encrypt = aead_encrypt;
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cra->cra_aead.decrypt = aead_decrypt;
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cra->cra_aead.givencrypt = aead_givencrypt;
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cra->cra_init = init_tfm_aead;
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}
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/* block ciphers */
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cra->cra_type = &crypto_ablkcipher_type;
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cra->cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
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||||
CRYPTO_ALG_KERN_DRIVER_ONLY |
|
||||
CRYPTO_ALG_ASYNC;
|
||||
if (!cra->cra_ablkcipher.setkey)
|
||||
cra->cra_ablkcipher.setkey = ablk_setkey;
|
||||
if (!cra->cra_ablkcipher.encrypt)
|
||||
cra->cra_ablkcipher.encrypt = ablk_encrypt;
|
||||
if (!cra->cra_ablkcipher.decrypt)
|
||||
cra->cra_ablkcipher.decrypt = ablk_decrypt;
|
||||
cra->cra_init = init_tfm_ablk;
|
||||
|
||||
cra->cra_ctxsize = sizeof(struct ixp_ctx);
|
||||
cra->cra_module = THIS_MODULE;
|
||||
cra->cra_alignmask = 3;
|
||||
|
|
@ -1473,6 +1438,39 @@ static int __init ixp_module_init(void)
|
|||
else
|
||||
ixp4xx_algos[i].registered = 1;
|
||||
}
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
|
||||
struct aead_alg *cra = &ixp4xx_aeads[i].crypto;
|
||||
|
||||
if (snprintf(cra->base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
|
||||
"%s"IXP_POSTFIX, cra->base.cra_name) >=
|
||||
CRYPTO_MAX_ALG_NAME)
|
||||
continue;
|
||||
if (!support_aes && (ixp4xx_algos[i].cfg_enc & MOD_AES))
|
||||
continue;
|
||||
|
||||
/* authenc */
|
||||
cra->base.cra_flags = CRYPTO_ALG_KERN_DRIVER_ONLY |
|
||||
CRYPTO_ALG_AEAD_NEW |
|
||||
CRYPTO_ALG_ASYNC;
|
||||
cra->setkey = aead_setkey;
|
||||
cra->setauthsize = aead_setauthsize;
|
||||
cra->encrypt = aead_encrypt;
|
||||
cra->decrypt = aead_decrypt;
|
||||
cra->init = init_tfm_aead;
|
||||
cra->exit = exit_tfm_aead;
|
||||
|
||||
cra->base.cra_ctxsize = sizeof(struct ixp_ctx);
|
||||
cra->base.cra_module = THIS_MODULE;
|
||||
cra->base.cra_alignmask = 3;
|
||||
cra->base.cra_priority = 300;
|
||||
|
||||
if (crypto_register_aead(cra))
|
||||
printk(KERN_ERR "Failed to register '%s'\n",
|
||||
cra->base.cra_driver_name);
|
||||
else
|
||||
ixp4xx_aeads[i].registered = 1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -1481,6 +1479,11 @@ static void __exit ixp_module_exit(void)
|
|||
int num = ARRAY_SIZE(ixp4xx_algos);
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(ixp4xx_aeads); i++) {
|
||||
if (ixp4xx_aeads[i].registered)
|
||||
crypto_unregister_aead(&ixp4xx_aeads[i].crypto);
|
||||
}
|
||||
|
||||
for (i=0; i< num; i++) {
|
||||
if (ixp4xx_algos[i].registered)
|
||||
crypto_unregister_alg(&ixp4xx_algos[i].crypto);
|
||||
|
|
|
|||
Loading…
Reference in New Issue