1 files changed, 46 insertions, 0 deletions
diff --git a/providers/implementations/ciphers/cipher_sm4_xts.h b/providers/implementations/ciphers/cipher_sm4_xts.h
new file mode 100644
index 0000000000..4c369183e2
--- /dev/null
+++ b/providers/implementations/ciphers/cipher_sm4_xts.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2022 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 <crypto/sm4.h>
+#include "prov/ciphercommon.h"
+#include "crypto/sm4_platform.h"
+
+PROV_CIPHER_FUNC(void, xts_stream,
+                 (const unsigned char *in, unsigned char *out, size_t len,
+                  const SM4_KEY *key1, const SM4_KEY *key2,
+                  const unsigned char iv[16]));
+
+typedef struct prov_sm4_xts_ctx_st {
+    /* Must be first */
+    PROV_CIPHER_CTX base;
+
+    /* SM4 key schedules to use */
+    union {
+        OSSL_UNION_ALIGN;
+        SM4_KEY ks;
+    } ks1, ks2;
+
+    /*-
+     * XTS standard to use with SM4-XTS algorithm
+     *
+     * Must be 0 or 1,
+     * 0 for XTS mode specified by GB/T 17964-2021
+     * 1 for XTS mode specified by IEEE Std 1619-2007
+     */
+    int xts_standard;
+
+    XTS128_CONTEXT xts;
+
+    /* Stream function for XTS mode specified by GB/T 17964-2021 */
+    OSSL_xts_stream_fn stream_gb;
+    /* Stream function for XTS mode specified by IEEE Std 1619-2007 */
+    OSSL_xts_stream_fn stream;
+} PROV_SM4_XTS_CTX;
+
+const PROV_CIPHER_HW *ossl_prov_cipher_hw_sm4_xts(size_t keybits);