3 files changed, 50 insertions, 0 deletions

diff --git a/crypto/aead.c b/crypto/aead.c
index f23c2b0ee009..0402b606fcfd 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -77,6 +77,11 @@ static unsigned int crypto_aead_ctxsize(struct crypto_alg *alg, u32 type,
         return alg->cra_ctxsize;
 }
 
+static int no_givdecrypt(struct aead_givcrypt_request *req)
+{
+        return -ENOSYS;
+}
+
 static int crypto_init_aead_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
 {
         struct aead_alg *alg = &tfm->__crt_alg->cra_aead;
@@ -88,6 +93,8 @@ static int crypto_init_aead_ops(struct crypto_tfm *tfm, u32 type, u32 mask)
         crt->setkey = setkey;
         crt->encrypt = alg->encrypt;
         crt->decrypt = alg->decrypt;
+        crt->givencrypt = alg->givencrypt;
+        crt->givdecrypt = alg->givdecrypt ?: no_givdecrypt;
         crt->ivsize = alg->ivsize;
         crt->authsize = alg->maxauthsize;
 
diff --git a/include/crypto/aead.h b/include/crypto/aead.h
new file mode 100644
index 000000000000..083920312da0
--- /dev/null
+++ b/include/crypto/aead.h
@@ -0,0 +1,38 @@
+/*
+ * AEAD: Authenticated Encryption with Associated Data
+ * 
+ * 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.
+ *
+ */
+
+#ifndef _CRYPTO_AEAD_H
+#define _CRYPTO_AEAD_H
+
+#include <linux/crypto.h>
+#include <linux/kernel.h>
+
+/**
+ *      struct aead_givcrypt_request - AEAD request with IV generation
+ *      @seq: Sequence number for IV generation
+ *      @giv: Space for generated IV
+ *      @areq: The AEAD request itself
+ */
+struct aead_givcrypt_request {
+        u64 seq;
+        u8 *giv;
+
+        struct aead_request areq;
+};
+
+static inline struct crypto_aead *aead_givcrypt_reqtfm(
+        struct aead_givcrypt_request *req)
+{
+        return crypto_aead_reqtfm(&req->areq);
+}
+
+#endif  /* _CRYPTO_AEAD_H */
diff --git a/include/linux/crypto.h b/include/linux/crypto.h
index 835dcaf3fe4e..7524928bff93 100644
--- a/include/linux/crypto.h
+++ b/include/linux/crypto.h
@@ -106,6 +106,7 @@ struct crypto_blkcipher;
 struct crypto_hash;
 struct crypto_tfm;
 struct crypto_type;
+struct aead_givcrypt_request;
 struct skcipher_givcrypt_request;
 
 typedef void (*crypto_completion_t)(struct crypto_async_request *req, int err);
@@ -202,6 +203,8 @@ struct aead_alg {
         int (*setauthsize)(struct crypto_aead *tfm, unsigned int authsize);
         int (*encrypt)(struct aead_request *req);
         int (*decrypt)(struct aead_request *req);
+        int (*givencrypt)(struct aead_givcrypt_request *req);
+        int (*givdecrypt)(struct aead_givcrypt_request *req);
 
         unsigned int ivsize;
         unsigned int maxauthsize;
@@ -348,6 +351,8 @@ struct aead_tfm {
                       unsigned int keylen);
         int (*encrypt)(struct aead_request *req);
         int (*decrypt)(struct aead_request *req);
+        int (*givencrypt)(struct aead_givcrypt_request *req);
+        int (*givdecrypt)(struct aead_givcrypt_request *req);
         unsigned int ivsize;
         unsigned int authsize;
         unsigned int reqsize;