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-rw-r--r--crypto/aead.c7
-rw-r--r--include/crypto/aead.h38
-rw-r--r--include/linux/crypto.h5
3 files changed, 50 insertions, 0 deletions
diff --git a/crypto/aead.c b/crypto/aead.c
index f23c2b0..0402b60 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 0000000..0839203
--- /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 835dcaf..7524928 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;
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