1 files changed, 175 insertions, 16 deletions

diff --git a/crypto/seqiv.c b/crypto/seqiv.c
index 9c2d80d..b903aab 100644
--- a/crypto/seqiv.c
+++ b/crypto/seqiv.c
@@ -13,6 +13,7 @@
  *
  */
 
+#include <crypto/internal/aead.h>
 #include <crypto/internal/skcipher.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -53,6 +54,46 @@ static void seqiv_complete(struct crypto_async_request *base, int 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);
@@ -61,9 +102,7 @@ static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
 	crypto_completion_t complete;
 	void *data;
 	u8 *info;
-	__be64 seq;
 	unsigned int ivsize;
-	unsigned int len;
 	int err;
 
 	ablkcipher_request_set_tfm(subreq, skcipher_geniv_cipher(geniv));
@@ -91,15 +130,7 @@ static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
 	ablkcipher_request_set_crypt(subreq, req->creq.src, req->creq.dst,
 				     req->creq.nbytes, info);
 
-	len = ivsize;
-	if (ivsize > sizeof(u64)) {
-		memset(info, 0, ivsize - sizeof(u64));
-		len = sizeof(u64);
-	}
-	seq = cpu_to_be64(req->seq);
-	memcpy(info + ivsize - len, &seq, len);
-	crypto_xor(info, ctx->salt, ivsize);
-
+	seqiv_geniv(ctx, info, req->seq, ivsize);
 	memcpy(req->giv, info, ivsize);
 
 	err = crypto_ablkcipher_encrypt(subreq);
@@ -108,6 +139,52 @@ static int seqiv_givencrypt(struct skcipher_givcrypt_request *req)
 	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);
@@ -126,6 +203,24 @@ unlock:
 	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);
+
+	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;
+	get_random_bytes(ctx->salt, crypto_aead_ivsize(geniv));
+
+unlock:
+	spin_unlock_bh(&ctx->lock);
+
+	return seqiv_aead_givencrypt(req);
+}
+
 static int seqiv_init(struct crypto_tfm *tfm)
 {
 	struct crypto_ablkcipher *geniv = __crypto_ablkcipher_cast(tfm);
@@ -138,13 +233,26 @@ static int seqiv_init(struct crypto_tfm *tfm)
 	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_alloc(struct rtattr **tb)
+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;
 
@@ -153,19 +261,70 @@ static struct crypto_instance *seqiv_alloc(struct rtattr **tb)
 	inst->alg.cra_init = seqiv_init;
 	inst->alg.cra_exit = skcipher_geniv_exit;
 
-	inst->alg.cra_alignmask |= __alignof__(u32) - 1;
-
-	inst->alg.cra_ctxsize = sizeof(struct seqiv_ctx);
 	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);
+
+	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 out;
+
+	inst->alg.cra_alignmask |= __alignof__(u32) - 1;
+	inst->alg.cra_ctxsize += sizeof(struct seqiv_ctx);
+
+out:
+	return inst;
+}
+
+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);
+}
+
 static struct crypto_template seqiv_tmpl = {
 	.name = "seqiv",
 	.alloc = seqiv_alloc,
-	.free = skcipher_geniv_free,
+	.free = seqiv_free,
 	.module = THIS_MODULE,
 };