[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/crypto/seqiv.c b/ap/os/linux/linux-3.4.x/crypto/seqiv.c
new file mode 100644
index 0000000..4c44912
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/crypto/seqiv.c
@@ -0,0 +1,365 @@
+/*
+ * seqiv: Sequence Number IV Generator
+ *
+ * This generator generates an IV based on a sequence number by xoring it
+ * with a salt. This algorithm is mainly useful for CTR and similar modes.
+ *
+ * Copyright (c) 2007 Herbert Xu <herbert@gondor.apana.org.au>
+ *
+ * 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/skcipher.h>
+#include <crypto/rng.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+
+struct seqiv_ctx {
+ spinlock_t lock;
+ u8 salt[] __attribute__ ((aligned(__alignof__(u32))));
+};
+
+static void seqiv_complete2(struct skcipher_givcrypt_request *req, int err)
+{
+ struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
+ struct crypto_ablkcipher *geniv;
+
+ if (err == -EINPROGRESS)
+ return;
+
+ if (err)
+ goto out;
+
+ geniv = skcipher_givcrypt_reqtfm(req);
+ memcpy(req->creq.info, subreq->info, crypto_ablkcipher_ivsize(geniv));
+
+out:
+ kfree(subreq->info);
+}
+
+static void seqiv_complete(struct crypto_async_request *base, int err)
+{
+ struct skcipher_givcrypt_request *req = base->data;
+
+ seqiv_complete2(req, err);
+ skcipher_givcrypt_complete(req, err);
+}
+
+static void seqiv_aead_complete2(struct aead_givcrypt_request *req, int err)
+{
+ struct aead_request *subreq = aead_givcrypt_reqctx(req);
+ struct crypto_aead *geniv;
+
+ if (err == -EINPROGRESS)
+ return;
+
+ if (err)
+ goto out;
+
+ geniv = aead_givcrypt_reqtfm(req);
+ memcpy(req->areq.iv, subreq->iv, crypto_aead_ivsize(geniv));
+
+out:
+ kfree(subreq->iv);
+}
+
+static void seqiv_aead_complete(struct crypto_async_request *base, int err)
+{
+ struct aead_givcrypt_request *req = base->data;
+
+ seqiv_aead_complete2(req, err);
+ aead_givcrypt_complete(req, err);
+}
+
+static void seqiv_geniv(struct seqiv_ctx *ctx, u8 *info, u64 seq,
+ unsigned int ivsize)
+{
+ unsigned int len = ivsize;
+
+ if (ivsize > sizeof(u64)) {
+ memset(info, 0, ivsize - sizeof(u64));
+ len = sizeof(u64);
+ }
+ seq = cpu_to_be64(seq);
+ memcpy(info + ivsize - len, &seq, len);
+ crypto_xor(info, ctx->salt, ivsize);
+}
+
+static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
+{
+ struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
+ struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
+ struct ablkcipher_request *subreq = skcipher_givcrypt_reqctx(req);
+ crypto_completion_t complete;
+ void *data;
+ u8 *info;
+ unsigned int ivsize;
+ int err;
+
+ ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv));
+
+ complete = req->creq.base.complete;
+ data = req->creq.base.data;
+ info = req->creq.info;
+
+ ivsize = crypto_ablkcipher_ivsize(geniv);
+
+ if (unlikely(!IS_ALIGNED((unsigned long)info,
+ crypto_ablkcipher_alignmask(geniv) + 1))) {
+ info = kmalloc(ivsize, req->creq.base.flags &
+ CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
+ GFP_ATOMIC);
+ if (!info)
+ return -ENOMEM;
+
+ complete = seqiv_complete;
+ data = req;
+ }
+
+ ablkcipher_request_set_callback(subreq, req->creq.base.flags, complete,
+ data);
+ ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst,
+ req->creq.nbytes, info);
+
+ seqiv_geniv(ctx, info, req->seq, ivsize);
+ memcpy(req->giv, info, ivsize);
+
+ err = crypto_ablkcipher_encrypt(subreq);
+ if (unlikely(info != req->creq.info))
+ seqiv_complete2(req, err);
+ return err;
+}
+
+static int seqiv_aead_givencrypt(struct aead_givcrypt_request *req)
+{
+ struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
+ struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
+ struct aead_request *areq = &req->areq;
+ struct aead_request *subreq = aead_givcrypt_reqctx(req);
+ crypto_completion_t complete;
+ void *data;
+ u8 *info;
+ unsigned int ivsize;
+ int err;
+
+ aead_request_set_tfm(subreq, aead_geniv_base(geniv));
+
+ complete = areq->base.complete;
+ data = areq->base.data;
+ info = areq->iv;
+
+ ivsize = crypto_aead_ivsize(geniv);
+
+ if (unlikely(!IS_ALIGNED((unsigned long)info,
+ crypto_aead_alignmask(geniv) + 1))) {
+ info = kmalloc(ivsize, areq->base.flags &
+ CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL:
+ GFP_ATOMIC);
+ if (!info)
+ return -ENOMEM;
+
+ complete = seqiv_aead_complete;
+ data = req;
+ }
+
+ aead_request_set_callback(subreq, areq->base.flags, complete, data);
+ aead_request_set_crypt(subreq, areq->src, areq->dst, areq->cryptlen,
+ info);
+ aead_request_set_assoc(subreq, areq->assoc, areq->assoclen);
+
+ seqiv_geniv(ctx, info, req->seq, ivsize);
+ memcpy(req->giv, info, ivsize);
+
+ err = crypto_aead_encrypt(subreq);
+ if (unlikely(info != areq->iv))
+ seqiv_aead_complete2(req, err);
+ return err;
+}
+
+static int seqiv_givencrypt_first(struct skcipher_givcrypt_request *req)
+{
+ struct crypto_ablkcipher *geniv = skcipher_givcrypt_reqtfm(req);
+ struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
+ int err = 0;
+
+ spin_lock_bh(&ctx->lock);
+ if (crypto_ablkcipher_crt(geniv)->givencrypt != seqiv_givencrypt_first)
+ goto unlock;
+
+ crypto_ablkcipher_crt(geniv)->givencrypt = seqiv_givencrypt;
+ err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
+ crypto_ablkcipher_ivsize(geniv));
+
+unlock:
+ spin_unlock_bh(&ctx->lock);
+
+ if (err)
+ return err;
+
+ return seqiv_givencrypt(req);
+}
+
+static int seqiv_aead_givencrypt_first(struct aead_givcrypt_request *req)
+{
+ struct crypto_aead *geniv = aead_givcrypt_reqtfm(req);
+ struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
+ int err = 0;
+
+ spin_lock_bh(&ctx->lock);
+ if (crypto_aead_crt(geniv)->givencrypt != seqiv_aead_givencrypt_first)
+ goto unlock;
+
+ crypto_aead_crt(geniv)->givencrypt = seqiv_aead_givencrypt;
+ err = crypto_rng_get_bytes(crypto_default_rng, ctx->salt,
+ crypto_aead_ivsize(geniv));
+
+unlock:
+ spin_unlock_bh(&ctx->lock);
+
+ if (err)
+ return err;
+
+ return seqiv_aead_givencrypt(req);
+}
+
+static int seqiv_init(struct crypto_tfm *tfm)
+{
+ struct crypto_ablkcipher *geniv = __crypto_ablkcipher_cast(tfm);
+ struct seqiv_ctx *ctx = crypto_ablkcipher_ctx(geniv);
+
+ spin_lock_init(&ctx->lock);
+
+ tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request);
+
+ return skcipher_geniv_init(tfm);
+}
+
+static int seqiv_aead_init(struct crypto_tfm *tfm)
+{
+ struct crypto_aead *geniv = __crypto_aead_cast(tfm);
+ struct seqiv_ctx *ctx = crypto_aead_ctx(geniv);
+
+ spin_lock_init(&ctx->lock);
+
+ tfm->crt_aead.reqsize = sizeof(struct aead_request);
+
+ return aead_geniv_init(tfm);
+}
+
+static struct crypto_template seqiv_tmpl;
+
+static struct crypto_instance *seqiv_ablkcipher_alloc(struct rtattr **tb)
+{
+ struct crypto_instance *inst;
+
+ inst = skcipher_geniv_alloc(&seqiv_tmpl, tb, 0, 0);
+
+ if (IS_ERR(inst))
+ goto out;
+
+ inst->alg.cra_ablkcipher.givencrypt = seqiv_givencrypt_first;
+
+ inst->alg.cra_init = seqiv_init;
+ inst->alg.cra_exit = skcipher_geniv_exit;
+
+ inst->alg.cra_ctxsize += inst->alg.cra_ablkcipher.ivsize;
+
+out:
+ return inst;
+}
+
+static struct crypto_instance *seqiv_aead_alloc(struct rtattr **tb)
+{
+ struct crypto_instance *inst;
+
+ inst = aead_geniv_alloc(&seqiv_tmpl, tb, 0, 0);
+
+ if (IS_ERR(inst))
+ goto out;
+
+ inst->alg.cra_aead.givencrypt = seqiv_aead_givencrypt_first;
+
+ inst->alg.cra_init = seqiv_aead_init;
+ inst->alg.cra_exit = aead_geniv_exit;
+
+ inst->alg.cra_ctxsize = inst->alg.cra_aead.ivsize;
+
+out:
+ return inst;
+}
+
+static struct crypto_instance *seqiv_alloc(struct rtattr **tb)
+{
+ struct crypto_attr_type *algt;
+ struct crypto_instance *inst;
+ int err;
+
+ algt = crypto_get_attr_type(tb);
+ err = PTR_ERR(algt);
+ if (IS_ERR(algt))
+ return ERR_PTR(err);
+
+ err = crypto_get_default_rng();
+ if (err)
+ return ERR_PTR(err);
+
+ if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK)
+ inst = seqiv_ablkcipher_alloc(tb);
+ else
+ inst = seqiv_aead_alloc(tb);
+
+ if (IS_ERR(inst))
+ goto put_rng;
+
+ inst->alg.cra_alignmask |= __alignof__(u32) - 1;
+ inst->alg.cra_ctxsize += sizeof(struct seqiv_ctx);
+
+out:
+ return inst;
+
+put_rng:
+ crypto_put_default_rng();
+ goto out;
+}
+
+static void seqiv_free(struct crypto_instance *inst)
+{
+ if ((inst->alg.cra_flags ^ CRYPTO_ALG_TYPE_AEAD) & CRYPTO_ALG_TYPE_MASK)
+ skcipher_geniv_free(inst);
+ else
+ aead_geniv_free(inst);
+ crypto_put_default_rng();
+}
+
+static struct crypto_template seqiv_tmpl = {
+ .name = "seqiv",
+ .alloc = seqiv_alloc,
+ .free = seqiv_free,
+ .module = THIS_MODULE,
+};
+
+static int __init seqiv_module_init(void)
+{
+ return crypto_register_template(&seqiv_tmpl);
+}
+
+static void __exit seqiv_module_exit(void)
+{
+ crypto_unregister_template(&seqiv_tmpl);
+}
+
+module_init(seqiv_module_init);
+module_exit(seqiv_module_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Sequence Number IV Generator");