1 files changed, 34 insertions, 0 deletions
diff --git a/providers/implementations/ciphers/cipher_chacha20.h b/providers/implementations/ciphers/cipher_chacha20.h
new file mode 100644
index 0000000000..f934c0033f
--- /dev/null
+++ b/providers/implementations/ciphers/cipher_chacha20.h
@@ -0,0 +1,34 @@
+/*
+ * 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 "include/crypto/chacha.h"
+#include "prov/ciphercommon.h"
+
+typedef struct {
+    PROV_CIPHER_CTX base;     /* must be first */
+    union {
+        OSSL_UNION_ALIGN;
+        unsigned int d[CHACHA_KEY_SIZE / 4];
+    } key;
+    unsigned int  counter[CHACHA_CTR_SIZE / 4];
+    unsigned char buf[CHACHA_BLK_SIZE];
+    unsigned int  partial_len;
+} PROV_CHACHA20_CTX;
+
+typedef struct prov_cipher_hw_chacha20_st {
+    PROV_CIPHER_HW base; /* must be first */
+    int (*initiv)(PROV_CIPHER_CTX *ctx);
+
+} PROV_CIPHER_HW_CHACHA20;
+
+const PROV_CIPHER_HW *PROV_CIPHER_HW_chacha20(size_t keybits);
+
+OSSL_OP_cipher_encrypt_init_fn chacha20_einit;
+OSSL_OP_cipher_decrypt_init_fn chacha20_dinit;
+void chacha20_initctx(PROV_CHACHA20_CTX *ctx);