[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/crypto/ccm.c b/src/kernel/linux/v4.19/crypto/ccm.c
new file mode 100644
index 0000000..8104c56
--- /dev/null
+++ b/src/kernel/linux/v4.19/crypto/ccm.c
@@ -0,0 +1,1045 @@
+/*
+ * CCM: Counter with CBC-MAC
+ *
+ * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+
+#include <crypto/internal/aead.h>
+#include <crypto/internal/hash.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/scatterwalk.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include "internal.h"
+
+struct ccm_instance_ctx {
+ struct crypto_skcipher_spawn ctr;
+ struct crypto_ahash_spawn mac;
+};
+
+struct crypto_ccm_ctx {
+ struct crypto_ahash *mac;
+ struct crypto_skcipher *ctr;
+};
+
+struct crypto_rfc4309_ctx {
+ struct crypto_aead *child;
+ u8 nonce[3];
+};
+
+struct crypto_rfc4309_req_ctx {
+ struct scatterlist src[3];
+ struct scatterlist dst[3];
+ struct aead_request subreq;
+};
+
+struct crypto_ccm_req_priv_ctx {
+ u8 odata[16];
+ u8 idata[16];
+ u8 auth_tag[16];
+ u32 flags;
+ struct scatterlist src[3];
+ struct scatterlist dst[3];
+ struct skcipher_request skreq;
+};
+
+struct cbcmac_tfm_ctx {
+ struct crypto_cipher *child;
+};
+
+struct cbcmac_desc_ctx {
+ unsigned int len;
+};
+
+static inline struct crypto_ccm_req_priv_ctx *crypto_ccm_reqctx(
+ struct aead_request *req)
+{
+ unsigned long align = crypto_aead_alignmask(crypto_aead_reqtfm(req));
+
+ return (void *)PTR_ALIGN((u8 *)aead_request_ctx(req), align + 1);
+}
+
+static int set_msg_len(u8 *block, unsigned int msglen, int csize)
+{
+ __be32 data;
+
+ memset(block, 0, csize);
+ block += csize;
+
+ if (csize >= 4)
+ csize = 4;
+ else if (msglen > (1 << (8 * csize)))
+ return -EOVERFLOW;
+
+ data = cpu_to_be32(msglen);
+ memcpy(block - csize, (u8 *)&data + 4 - csize, csize);
+
+ return 0;
+}
+
+static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
+ struct crypto_skcipher *ctr = ctx->ctr;
+ struct crypto_ahash *mac = ctx->mac;
+ int err = 0;
+
+ crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK);
+ crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) &
+ CRYPTO_TFM_REQ_MASK);
+ err = crypto_skcipher_setkey(ctr, key, keylen);
+ crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctr) &
+ CRYPTO_TFM_RES_MASK);
+ if (err)
+ goto out;
+
+ crypto_ahash_clear_flags(mac, CRYPTO_TFM_REQ_MASK);
+ crypto_ahash_set_flags(mac, crypto_aead_get_flags(aead) &
+ CRYPTO_TFM_REQ_MASK);
+ err = crypto_ahash_setkey(mac, key, keylen);
+ crypto_aead_set_flags(aead, crypto_ahash_get_flags(mac) &
+ CRYPTO_TFM_RES_MASK);
+
+out:
+ return err;
+}
+
+static int crypto_ccm_setauthsize(struct crypto_aead *tfm,
+ unsigned int authsize)
+{
+ switch (authsize) {
+ case 4:
+ case 6:
+ case 8:
+ case 10:
+ case 12:
+ case 14:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int format_input(u8 *info, struct aead_request *req,
+ unsigned int cryptlen)
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ unsigned int lp = req->iv[0];
+ unsigned int l = lp + 1;
+ unsigned int m;
+
+ m = crypto_aead_authsize(aead);
+
+ memcpy(info, req->iv, 16);
+
+ /* format control info per RFC 3610 and
+ * NIST Special Publication 800-38C
+ */
+ *info |= (8 * ((m - 2) / 2));
+ if (req->assoclen)
+ *info |= 64;
+
+ return set_msg_len(info + 16 - l, cryptlen, l);
+}
+
+static int format_adata(u8 *adata, unsigned int a)
+{
+ int len = 0;
+
+ /* add control info for associated data
+ * RFC 3610 and NIST Special Publication 800-38C
+ */
+ if (a < 65280) {
+ *(__be16 *)adata = cpu_to_be16(a);
+ len = 2;
+ } else {
+ *(__be16 *)adata = cpu_to_be16(0xfffe);
+ *(__be32 *)&adata[2] = cpu_to_be32(a);
+ len = 6;
+ }
+
+ return len;
+}
+
+static int crypto_ccm_auth(struct aead_request *req, struct scatterlist *plain,
+ unsigned int cryptlen)
+{
+ struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
+ AHASH_REQUEST_ON_STACK(ahreq, ctx->mac);
+ unsigned int assoclen = req->assoclen;
+ struct scatterlist sg[3];
+ u8 *odata = pctx->odata;
+ u8 *idata = pctx->idata;
+ int ilen, err;
+
+ /* format control data for input */
+ err = format_input(odata, req, cryptlen);
+ if (err)
+ goto out;
+
+ sg_init_table(sg, 3);
+ sg_set_buf(&sg[0], odata, 16);
+
+ /* format associated data and compute into mac */
+ if (assoclen) {
+ ilen = format_adata(idata, assoclen);
+ sg_set_buf(&sg[1], idata, ilen);
+ sg_chain(sg, 3, req->src);
+ } else {
+ ilen = 0;
+ sg_chain(sg, 2, req->src);
+ }
+
+ ahash_request_set_tfm(ahreq, ctx->mac);
+ ahash_request_set_callback(ahreq, pctx->flags, NULL, NULL);
+ ahash_request_set_crypt(ahreq, sg, NULL, assoclen + ilen + 16);
+ err = crypto_ahash_init(ahreq);
+ if (err)
+ goto out;
+ err = crypto_ahash_update(ahreq);
+ if (err)
+ goto out;
+
+ /* we need to pad the MAC input to a round multiple of the block size */
+ ilen = 16 - (assoclen + ilen) % 16;
+ if (ilen < 16) {
+ memset(idata, 0, ilen);
+ sg_init_table(sg, 2);
+ sg_set_buf(&sg[0], idata, ilen);
+ if (plain)
+ sg_chain(sg, 2, plain);
+ plain = sg;
+ cryptlen += ilen;
+ }
+
+ ahash_request_set_crypt(ahreq, plain, pctx->odata, cryptlen);
+ err = crypto_ahash_finup(ahreq);
+out:
+ return err;
+}
+
+static void crypto_ccm_encrypt_done(struct crypto_async_request *areq, int err)
+{
+ struct aead_request *req = areq->data;
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
+ u8 *odata = pctx->odata;
+
+ if (!err)
+ scatterwalk_map_and_copy(odata, req->dst,
+ req->assoclen + req->cryptlen,
+ crypto_aead_authsize(aead), 1);
+ aead_request_complete(req, err);
+}
+
+static inline int crypto_ccm_check_iv(const u8 *iv)
+{
+ /* 2 <= L <= 8, so 1 <= L' <= 7. */
+ if (1 > iv[0] || iv[0] > 7)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int crypto_ccm_init_crypt(struct aead_request *req, u8 *tag)
+{
+ struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
+ struct scatterlist *sg;
+ u8 *iv = req->iv;
+ int err;
+
+ err = crypto_ccm_check_iv(iv);
+ if (err)
+ return err;
+
+ pctx->flags = aead_request_flags(req);
+
+ /* Note: rfc 3610 and NIST 800-38C require counter of
+ * zero to encrypt auth tag.
+ */
+ memset(iv + 15 - iv[0], 0, iv[0] + 1);
+
+ sg_init_table(pctx->src, 3);
+ sg_set_buf(pctx->src, tag, 16);
+ sg = scatterwalk_ffwd(pctx->src + 1, req->src, req->assoclen);
+ if (sg != pctx->src + 1)
+ sg_chain(pctx->src, 2, sg);
+
+ if (req->src != req->dst) {
+ sg_init_table(pctx->dst, 3);
+ sg_set_buf(pctx->dst, tag, 16);
+ sg = scatterwalk_ffwd(pctx->dst + 1, req->dst, req->assoclen);
+ if (sg != pctx->dst + 1)
+ sg_chain(pctx->dst, 2, sg);
+ }
+
+ return 0;
+}
+
+static int crypto_ccm_encrypt(struct aead_request *req)
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
+ struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
+ struct skcipher_request *skreq = &pctx->skreq;
+ struct scatterlist *dst;
+ unsigned int cryptlen = req->cryptlen;
+ u8 *odata = pctx->odata;
+ u8 *iv = req->iv;
+ int err;
+
+ err = crypto_ccm_init_crypt(req, odata);
+ if (err)
+ return err;
+
+ err = crypto_ccm_auth(req, sg_next(pctx->src), cryptlen);
+ if (err)
+ return err;
+
+ dst = pctx->src;
+ if (req->src != req->dst)
+ dst = pctx->dst;
+
+ skcipher_request_set_tfm(skreq, ctx->ctr);
+ skcipher_request_set_callback(skreq, pctx->flags,
+ crypto_ccm_encrypt_done, req);
+ skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv);
+ err = crypto_skcipher_encrypt(skreq);
+ if (err)
+ return err;
+
+ /* copy authtag to end of dst */
+ scatterwalk_map_and_copy(odata, sg_next(dst), cryptlen,
+ crypto_aead_authsize(aead), 1);
+ return err;
+}
+
+static void crypto_ccm_decrypt_done(struct crypto_async_request *areq,
+ int err)
+{
+ struct aead_request *req = areq->data;
+ struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ unsigned int authsize = crypto_aead_authsize(aead);
+ unsigned int cryptlen = req->cryptlen - authsize;
+ struct scatterlist *dst;
+
+ pctx->flags = 0;
+
+ dst = sg_next(req->src == req->dst ? pctx->src : pctx->dst);
+
+ if (!err) {
+ err = crypto_ccm_auth(req, dst, cryptlen);
+ if (!err && crypto_memneq(pctx->auth_tag, pctx->odata, authsize))
+ err = -EBADMSG;
+ }
+ aead_request_complete(req, err);
+}
+
+static int crypto_ccm_decrypt(struct aead_request *req)
+{
+ struct crypto_aead *aead = crypto_aead_reqtfm(req);
+ struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead);
+ struct crypto_ccm_req_priv_ctx *pctx = crypto_ccm_reqctx(req);
+ struct skcipher_request *skreq = &pctx->skreq;
+ struct scatterlist *dst;
+ unsigned int authsize = crypto_aead_authsize(aead);
+ unsigned int cryptlen = req->cryptlen;
+ u8 *authtag = pctx->auth_tag;
+ u8 *odata = pctx->odata;
+ u8 *iv = pctx->idata;
+ int err;
+
+ cryptlen -= authsize;
+
+ err = crypto_ccm_init_crypt(req, authtag);
+ if (err)
+ return err;
+
+ scatterwalk_map_and_copy(authtag, sg_next(pctx->src), cryptlen,
+ authsize, 0);
+
+ dst = pctx->src;
+ if (req->src != req->dst)
+ dst = pctx->dst;
+
+ memcpy(iv, req->iv, 16);
+
+ skcipher_request_set_tfm(skreq, ctx->ctr);
+ skcipher_request_set_callback(skreq, pctx->flags,
+ crypto_ccm_decrypt_done, req);
+ skcipher_request_set_crypt(skreq, pctx->src, dst, cryptlen + 16, iv);
+ err = crypto_skcipher_decrypt(skreq);
+ if (err)
+ return err;
+
+ err = crypto_ccm_auth(req, sg_next(dst), cryptlen);
+ if (err)
+ return err;
+
+ /* verify */
+ if (crypto_memneq(authtag, odata, authsize))
+ return -EBADMSG;
+
+ return err;
+}
+
+static int crypto_ccm_init_tfm(struct crypto_aead *tfm)
+{
+ struct aead_instance *inst = aead_alg_instance(tfm);
+ struct ccm_instance_ctx *ictx = aead_instance_ctx(inst);
+ struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
+ struct crypto_ahash *mac;
+ struct crypto_skcipher *ctr;
+ unsigned long align;
+ int err;
+
+ mac = crypto_spawn_ahash(&ictx->mac);
+ if (IS_ERR(mac))
+ return PTR_ERR(mac);
+
+ ctr = crypto_spawn_skcipher(&ictx->ctr);
+ err = PTR_ERR(ctr);
+ if (IS_ERR(ctr))
+ goto err_free_mac;
+
+ ctx->mac = mac;
+ ctx->ctr = ctr;
+
+ align = crypto_aead_alignmask(tfm);
+ align &= ~(crypto_tfm_ctx_alignment() - 1);
+ crypto_aead_set_reqsize(
+ tfm,
+ align + sizeof(struct crypto_ccm_req_priv_ctx) +
+ crypto_skcipher_reqsize(ctr));
+
+ return 0;
+
+err_free_mac:
+ crypto_free_ahash(mac);
+ return err;
+}
+
+static void crypto_ccm_exit_tfm(struct crypto_aead *tfm)
+{
+ struct crypto_ccm_ctx *ctx = crypto_aead_ctx(tfm);
+
+ crypto_free_ahash(ctx->mac);
+ crypto_free_skcipher(ctx->ctr);
+}
+
+static void crypto_ccm_free(struct aead_instance *inst)
+{
+ struct ccm_instance_ctx *ctx = aead_instance_ctx(inst);
+
+ crypto_drop_ahash(&ctx->mac);
+ crypto_drop_skcipher(&ctx->ctr);
+ kfree(inst);
+}
+
+static int crypto_ccm_create_common(struct crypto_template *tmpl,
+ struct rtattr **tb,
+ const char *ctr_name,
+ const char *mac_name)
+{
+ struct crypto_attr_type *algt;
+ struct aead_instance *inst;
+ struct skcipher_alg *ctr;
+ struct crypto_alg *mac_alg;
+ struct hash_alg_common *mac;
+ struct ccm_instance_ctx *ictx;
+ int err;
+
+ algt = crypto_get_attr_type(tb);
+ if (IS_ERR(algt))
+ return PTR_ERR(algt);
+
+ if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
+ return -EINVAL;
+
+ mac_alg = crypto_find_alg(mac_name, &crypto_ahash_type,
+ CRYPTO_ALG_TYPE_HASH,
+ CRYPTO_ALG_TYPE_AHASH_MASK |
+ CRYPTO_ALG_ASYNC);
+ if (IS_ERR(mac_alg))
+ return PTR_ERR(mac_alg);
+
+ mac = __crypto_hash_alg_common(mac_alg);
+ err = -EINVAL;
+ if (strncmp(mac->base.cra_name, "cbcmac(", 7) != 0 ||
+ mac->digestsize != 16)
+ goto out_put_mac;
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*ictx), GFP_KERNEL);
+ err = -ENOMEM;
+ if (!inst)
+ goto out_put_mac;
+
+ ictx = aead_instance_ctx(inst);
+ err = crypto_init_ahash_spawn(&ictx->mac, mac,
+ aead_crypto_instance(inst));
+ if (err)
+ goto err_free_inst;
+
+ crypto_set_skcipher_spawn(&ictx->ctr, aead_crypto_instance(inst));
+ err = crypto_grab_skcipher(&ictx->ctr, ctr_name, 0,
+ crypto_requires_sync(algt->type,
+ algt->mask));
+ if (err)
+ goto err_drop_mac;
+
+ ctr = crypto_spawn_skcipher_alg(&ictx->ctr);
+
+ /* The skcipher algorithm must be CTR mode, using 16-byte blocks. */
+ err = -EINVAL;
+ if (strncmp(ctr->base.cra_name, "ctr(", 4) != 0 ||
+ crypto_skcipher_alg_ivsize(ctr) != 16 ||
+ ctr->base.cra_blocksize != 1)
+ goto err_drop_ctr;
+
+ /* ctr and cbcmac must use the same underlying block cipher. */
+ if (strcmp(ctr->base.cra_name + 4, mac->base.cra_name + 7) != 0)
+ goto err_drop_ctr;
+
+ err = -ENAMETOOLONG;
+ if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
+ "ccm(%s", ctr->base.cra_name + 4) >= CRYPTO_MAX_ALG_NAME)
+ goto err_drop_ctr;
+
+ if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
+ "ccm_base(%s,%s)", ctr->base.cra_driver_name,
+ mac->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
+ goto err_drop_ctr;
+
+ inst->alg.base.cra_flags = ctr->base.cra_flags & CRYPTO_ALG_ASYNC;
+ inst->alg.base.cra_priority = (mac->base.cra_priority +
+ ctr->base.cra_priority) / 2;
+ inst->alg.base.cra_blocksize = 1;
+ inst->alg.base.cra_alignmask = mac->base.cra_alignmask |
+ ctr->base.cra_alignmask;
+ inst->alg.ivsize = 16;
+ inst->alg.chunksize = crypto_skcipher_alg_chunksize(ctr);
+ inst->alg.maxauthsize = 16;
+ inst->alg.base.cra_ctxsize = sizeof(struct crypto_ccm_ctx);
+ inst->alg.init = crypto_ccm_init_tfm;
+ inst->alg.exit = crypto_ccm_exit_tfm;
+ inst->alg.setkey = crypto_ccm_setkey;
+ inst->alg.setauthsize = crypto_ccm_setauthsize;
+ inst->alg.encrypt = crypto_ccm_encrypt;
+ inst->alg.decrypt = crypto_ccm_decrypt;
+
+ inst->free = crypto_ccm_free;
+
+ err = aead_register_instance(tmpl, inst);
+ if (err)
+ goto err_drop_ctr;
+
+out_put_mac:
+ crypto_mod_put(mac_alg);
+ return err;
+
+err_drop_ctr:
+ crypto_drop_skcipher(&ictx->ctr);
+err_drop_mac:
+ crypto_drop_ahash(&ictx->mac);
+err_free_inst:
+ kfree(inst);
+ goto out_put_mac;
+}
+
+static int crypto_ccm_create(struct crypto_template *tmpl, struct rtattr **tb)
+{
+ const char *cipher_name;
+ char ctr_name[CRYPTO_MAX_ALG_NAME];
+ char mac_name[CRYPTO_MAX_ALG_NAME];
+
+ cipher_name = crypto_attr_alg_name(tb[1]);
+ if (IS_ERR(cipher_name))
+ return PTR_ERR(cipher_name);
+
+ if (snprintf(ctr_name, CRYPTO_MAX_ALG_NAME, "ctr(%s)",
+ cipher_name) >= CRYPTO_MAX_ALG_NAME)
+ return -ENAMETOOLONG;
+
+ if (snprintf(mac_name, CRYPTO_MAX_ALG_NAME, "cbcmac(%s)",
+ cipher_name) >= CRYPTO_MAX_ALG_NAME)
+ return -ENAMETOOLONG;
+
+ return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name);
+}
+
+static struct crypto_template crypto_ccm_tmpl = {
+ .name = "ccm",
+ .create = crypto_ccm_create,
+ .module = THIS_MODULE,
+};
+
+static int crypto_ccm_base_create(struct crypto_template *tmpl,
+ struct rtattr **tb)
+{
+ const char *ctr_name;
+ const char *mac_name;
+
+ ctr_name = crypto_attr_alg_name(tb[1]);
+ if (IS_ERR(ctr_name))
+ return PTR_ERR(ctr_name);
+
+ mac_name = crypto_attr_alg_name(tb[2]);
+ if (IS_ERR(mac_name))
+ return PTR_ERR(mac_name);
+
+ return crypto_ccm_create_common(tmpl, tb, ctr_name, mac_name);
+}
+
+static struct crypto_template crypto_ccm_base_tmpl = {
+ .name = "ccm_base",
+ .create = crypto_ccm_base_create,
+ .module = THIS_MODULE,
+};
+
+static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key,
+ unsigned int keylen)
+{
+ struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent);
+ struct crypto_aead *child = ctx->child;
+ int err;
+
+ if (keylen < 3)
+ return -EINVAL;
+
+ keylen -= 3;
+ memcpy(ctx->nonce, key + keylen, 3);
+
+ crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK);
+ crypto_aead_set_flags(child, crypto_aead_get_flags(parent) &
+ CRYPTO_TFM_REQ_MASK);
+ err = crypto_aead_setkey(child, key, keylen);
+ crypto_aead_set_flags(parent, crypto_aead_get_flags(child) &
+ CRYPTO_TFM_RES_MASK);
+
+ return err;
+}
+
+static int crypto_rfc4309_setauthsize(struct crypto_aead *parent,
+ unsigned int authsize)
+{
+ struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent);
+
+ switch (authsize) {
+ case 8:
+ case 12:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return crypto_aead_setauthsize(ctx->child, authsize);
+}
+
+static struct aead_request *crypto_rfc4309_crypt(struct aead_request *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);
+
+ /* L' */
+ iv[0] = 3;
+
+ 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, 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);
+}
+
+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_aead *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;
+
+ aead = crypto_spawn_aead(spawn);
+ if (IS_ERR(aead))
+ return PTR_ERR(aead);
+
+ ctx->child = aead;
+
+ align = crypto_aead_alignmask(aead);
+ align &= ~(crypto_tfm_ctx_alignment() - 1);
+ crypto_aead_set_reqsize(
+ tfm,
+ sizeof(struct crypto_rfc4309_req_ctx) +
+ ALIGN(crypto_aead_reqsize(aead), crypto_tfm_ctx_alignment()) +
+ align + 32);
+
+ return 0;
+}
+
+static void crypto_rfc4309_exit_tfm(struct crypto_aead *tfm)
+{
+ struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(tfm);
+
+ crypto_free_aead(ctx->child);
+}
+
+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 aead_instance *inst;
+ struct crypto_aead_spawn *spawn;
+ struct aead_alg *alg;
+ const char *ccm_name;
+ int err;
+
+ algt = crypto_get_attr_type(tb);
+ if (IS_ERR(algt))
+ return PTR_ERR(algt);
+
+ if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
+ return -EINVAL;
+
+ ccm_name = crypto_attr_alg_name(tb[1]);
+ if (IS_ERR(ccm_name))
+ return PTR_ERR(ccm_name);
+
+ inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+
+ 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_spawn_aead_alg(spawn);
+
+ err = -EINVAL;
+
+ /* We only support 16-byte blocks. */
+ if (crypto_aead_alg_ivsize(alg) != 16)
+ goto out_drop_alg;
+
+ /* Not a stream cipher? */
+ if (alg->base.cra_blocksize != 1)
+ goto out_drop_alg;
+
+ err = -ENAMETOOLONG;
+ 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.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC;
+ 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.ivsize = 8;
+ inst->alg.chunksize = crypto_aead_alg_chunksize(alg);
+ inst->alg.maxauthsize = 16;
+
+ inst->alg.base.cra_ctxsize = sizeof(struct crypto_rfc4309_ctx);
+
+ inst->alg.init = crypto_rfc4309_init_tfm;
+ inst->alg.exit = crypto_rfc4309_exit_tfm;
+
+ 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->free = crypto_rfc4309_free;
+
+ err = aead_register_instance(tmpl, inst);
+ if (err)
+ goto out_drop_alg;
+
+out:
+ return err;
+
+out_drop_alg:
+ crypto_drop_aead(spawn);
+out_free_inst:
+ kfree(inst);
+ goto out;
+}
+
+static struct crypto_template crypto_rfc4309_tmpl = {
+ .name = "rfc4309",
+ .create = crypto_rfc4309_create,
+ .module = THIS_MODULE,
+};
+
+static int crypto_cbcmac_digest_setkey(struct crypto_shash *parent,
+ const u8 *inkey, unsigned int keylen)
+{
+ struct cbcmac_tfm_ctx *ctx = crypto_shash_ctx(parent);
+
+ return crypto_cipher_setkey(ctx->child, inkey, keylen);
+}
+
+static int crypto_cbcmac_digest_init(struct shash_desc *pdesc)
+{
+ struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc);
+ int bs = crypto_shash_digestsize(pdesc->tfm);
+ u8 *dg = (u8 *)ctx + crypto_shash_descsize(pdesc->tfm) - bs;
+
+ ctx->len = 0;
+ memset(dg, 0, bs);
+
+ return 0;
+}
+
+static int crypto_cbcmac_digest_update(struct shash_desc *pdesc, const u8 *p,
+ unsigned int len)
+{
+ struct crypto_shash *parent = pdesc->tfm;
+ struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent);
+ struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc);
+ struct crypto_cipher *tfm = tctx->child;
+ int bs = crypto_shash_digestsize(parent);
+ u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs;
+
+ while (len > 0) {
+ unsigned int l = min(len, bs - ctx->len);
+
+ crypto_xor(dg + ctx->len, p, l);
+ ctx->len +=l;
+ len -= l;
+ p += l;
+
+ if (ctx->len == bs) {
+ crypto_cipher_encrypt_one(tfm, dg, dg);
+ ctx->len = 0;
+ }
+ }
+
+ return 0;
+}
+
+static int crypto_cbcmac_digest_final(struct shash_desc *pdesc, u8 *out)
+{
+ struct crypto_shash *parent = pdesc->tfm;
+ struct cbcmac_tfm_ctx *tctx = crypto_shash_ctx(parent);
+ struct cbcmac_desc_ctx *ctx = shash_desc_ctx(pdesc);
+ struct crypto_cipher *tfm = tctx->child;
+ int bs = crypto_shash_digestsize(parent);
+ u8 *dg = (u8 *)ctx + crypto_shash_descsize(parent) - bs;
+
+ if (ctx->len)
+ crypto_cipher_encrypt_one(tfm, dg, dg);
+
+ memcpy(out, dg, bs);
+ return 0;
+}
+
+static int cbcmac_init_tfm(struct crypto_tfm *tfm)
+{
+ struct crypto_cipher *cipher;
+ struct crypto_instance *inst = (void *)tfm->__crt_alg;
+ struct crypto_spawn *spawn = crypto_instance_ctx(inst);
+ struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ cipher = crypto_spawn_cipher(spawn);
+ if (IS_ERR(cipher))
+ return PTR_ERR(cipher);
+
+ ctx->child = cipher;
+
+ return 0;
+};
+
+static void cbcmac_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct cbcmac_tfm_ctx *ctx = crypto_tfm_ctx(tfm);
+ crypto_free_cipher(ctx->child);
+}
+
+static int cbcmac_create(struct crypto_template *tmpl, struct rtattr **tb)
+{
+ struct shash_instance *inst;
+ struct crypto_alg *alg;
+ int err;
+
+ err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SHASH);
+ if (err)
+ return err;
+
+ alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
+ CRYPTO_ALG_TYPE_MASK);
+ if (IS_ERR(alg))
+ return PTR_ERR(alg);
+
+ inst = shash_alloc_instance("cbcmac", alg);
+ err = PTR_ERR(inst);
+ if (IS_ERR(inst))
+ goto out_put_alg;
+
+ err = crypto_init_spawn(shash_instance_ctx(inst), alg,
+ shash_crypto_instance(inst),
+ CRYPTO_ALG_TYPE_MASK);
+ if (err)
+ goto out_free_inst;
+
+ inst->alg.base.cra_priority = alg->cra_priority;
+ inst->alg.base.cra_blocksize = 1;
+
+ inst->alg.digestsize = alg->cra_blocksize;
+ inst->alg.descsize = ALIGN(sizeof(struct cbcmac_desc_ctx),
+ alg->cra_alignmask + 1) +
+ alg->cra_blocksize;
+
+ inst->alg.base.cra_ctxsize = sizeof(struct cbcmac_tfm_ctx);
+ inst->alg.base.cra_init = cbcmac_init_tfm;
+ inst->alg.base.cra_exit = cbcmac_exit_tfm;
+
+ inst->alg.init = crypto_cbcmac_digest_init;
+ inst->alg.update = crypto_cbcmac_digest_update;
+ inst->alg.final = crypto_cbcmac_digest_final;
+ inst->alg.setkey = crypto_cbcmac_digest_setkey;
+
+ err = shash_register_instance(tmpl, inst);
+
+out_free_inst:
+ if (err)
+ shash_free_instance(shash_crypto_instance(inst));
+
+out_put_alg:
+ crypto_mod_put(alg);
+ return err;
+}
+
+static struct crypto_template crypto_cbcmac_tmpl = {
+ .name = "cbcmac",
+ .create = cbcmac_create,
+ .free = shash_free_instance,
+ .module = THIS_MODULE,
+};
+
+static int __init crypto_ccm_module_init(void)
+{
+ int err;
+
+ err = crypto_register_template(&crypto_cbcmac_tmpl);
+ if (err)
+ goto out;
+
+ err = crypto_register_template(&crypto_ccm_base_tmpl);
+ if (err)
+ goto out_undo_cbcmac;
+
+ err = crypto_register_template(&crypto_ccm_tmpl);
+ if (err)
+ goto out_undo_base;
+
+ err = crypto_register_template(&crypto_rfc4309_tmpl);
+ if (err)
+ goto out_undo_ccm;
+
+out:
+ return err;
+
+out_undo_ccm:
+ crypto_unregister_template(&crypto_ccm_tmpl);
+out_undo_base:
+ crypto_unregister_template(&crypto_ccm_base_tmpl);
+out_undo_cbcmac:
+ crypto_register_template(&crypto_cbcmac_tmpl);
+ goto out;
+}
+
+static void __exit crypto_ccm_module_exit(void)
+{
+ crypto_unregister_template(&crypto_rfc4309_tmpl);
+ crypto_unregister_template(&crypto_ccm_tmpl);
+ crypto_unregister_template(&crypto_ccm_base_tmpl);
+ crypto_unregister_template(&crypto_cbcmac_tmpl);
+}
+
+module_init(crypto_ccm_module_init);
+module_exit(crypto_ccm_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Counter with CBC MAC");
+MODULE_ALIAS_CRYPTO("ccm_base");
+MODULE_ALIAS_CRYPTO("rfc4309");
+MODULE_ALIAS_CRYPTO("ccm");