Add aes_ocb cipher to providers

[thirdparty/openssl.git] / providers / default / ciphers / cipher_aes_ocb.h

diff --git a/providers/default/ciphers/cipher_aes_ocb.h b/providers/default/ciphers/cipher_aes_ocb.h
new file mode 100644 (file)
index 0000000..7750e97
--- /dev/null
+++ b/providers/default/ciphers/cipher_aes_ocb.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <openssl/aes.h>
+#include "internal/ciphers/ciphercommon.h"
+
+#define OCB_MAX_TAG_LEN     AES_BLOCK_SIZE
+#define OCB_MAX_DATA_LEN    AES_BLOCK_SIZE
+#define OCB_MAX_AAD_LEN     AES_BLOCK_SIZE
+
+typedef struct prov_aes_ocb_ctx_st {
+    PROV_CIPHER_CTX base;       /* Must be first */
+    union {
+        OSSL_UNION_ALIGN;
+        AES_KEY ks;
+    } ksenc;                    /* AES key schedule to use for encryption/aad */
+    union {
+        OSSL_UNION_ALIGN;
+        AES_KEY ks;
+    } ksdec;                    /* AES key schedule to use for decryption */
+    OCB128_CONTEXT ocb;
+    unsigned int iv_state;      /* set to one of IV_STATE_XXX */
+    unsigned int key_set : 1;
+    size_t taglen;
+    size_t data_buf_len;
+    size_t aad_buf_len;
+    unsigned char tag[OCB_MAX_TAG_LEN];
+    unsigned char data_buf[OCB_MAX_DATA_LEN]; /* Store partial data blocks */
+    unsigned char aad_buf[OCB_MAX_AAD_LEN];   /* Store partial AAD blocks */
+} PROV_AES_OCB_CTX;
+
+const PROV_CIPHER_HW *PROV_CIPHER_HW_aes_ocb(size_t keybits);