1 files changed, 43 insertions, 0 deletions
diff --git a/providers/implementations/ciphers/cipher_chacha20_poly1305.h b/providers/implementations/ciphers/cipher_chacha20_poly1305.h
new file mode 100644
index 0000000000..00b173d1ed
--- /dev/null
+++ b/providers/implementations/ciphers/cipher_chacha20_poly1305.h
@@ -0,0 +1,43 @@
+/*
+ * 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
+ */
+
+/* Dispatch functions for chacha20_poly1305 cipher */
+
+#include "include/crypto/poly1305.h"
+#include "cipher_chacha20.h"
+
+#define NO_TLS_PAYLOAD_LENGTH ((size_t)-1)
+#define CHACHA20_POLY1305_IVLEN 12
+
+typedef struct {
+    PROV_CIPHER_CTX base;       /* must be first */
+    PROV_CHACHA20_CTX chacha;
+    POLY1305 poly1305;
+    unsigned int nonce[12 / 4];
+    unsigned char tag[POLY1305_BLOCK_SIZE];
+    unsigned char tls_aad[POLY1305_BLOCK_SIZE];
+    struct { uint64_t aad, text; } len;
+    unsigned int aad : 1;
+    unsigned int mac_inited : 1;
+    size_t tag_len, nonce_len;
+    size_t tls_payload_length;
+    size_t tls_aad_pad_sz;
+} PROV_CHACHA20_POLY1305_CTX;
+
+typedef struct prov_cipher_hw_chacha_aead_st {
+    PROV_CIPHER_HW base; /* must be first */
+    int (*aead_cipher)(PROV_CIPHER_CTX *dat, unsigned char *out, size_t *outl,
+                       const unsigned char *in, size_t len);
+    int (*initiv)(PROV_CIPHER_CTX *ctx);
+    int (*tls_init)(PROV_CIPHER_CTX *ctx, unsigned char *aad, size_t alen);
+    int (*tls_iv_set_fixed)(PROV_CIPHER_CTX *ctx, unsigned char *fixed,
+                            size_t flen);
+} PROV_CIPHER_HW_CHACHA20_POLY1305;
+
+const PROV_CIPHER_HW *PROV_CIPHER_HW_chacha20_poly1305(size_t keybits);