OpenSSL 1.1.1-pre2

crypto/poly1305/poly1305_ameth.c

@@ -0,0 +1,67 @@
+/*
+ * Copyright 2007-2017 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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 <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/evp.h>
+#include "internal/asn1_int.h"
+#include "internal/poly1305.h"
+#include "poly1305_local.h"
+
+/*
+ * POLY1305 "ASN1" method. This is just here to indicate the maximum
+ * POLY1305 output length and to free up a POLY1305 key.
+ */
+
+static int poly1305_size(const EVP_PKEY *pkey)
+{
+    return POLY1305_DIGEST_SIZE;
+}
+
+static void poly1305_key_free(EVP_PKEY *pkey)
+{
+    ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey);
+    if (os != NULL) {
+        if (os->data != NULL)
+            OPENSSL_cleanse(os->data, os->length);
+        ASN1_OCTET_STRING_free(os);
+    }
+}
+
+static int poly1305_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
+{
+    /* nothing, (including ASN1_PKEY_CTRL_DEFAULT_MD_NID), is supported */
+    return -2;
+}
+
+static int poly1305_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+{
+    return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b));
+}
+
+const EVP_PKEY_ASN1_METHOD poly1305_asn1_meth = {
+    EVP_PKEY_POLY1305,
+    EVP_PKEY_POLY1305,
+    0,
+
+    "POLY1305",
+    "OpenSSL POLY1305 method",
+
+    0, 0, poly1305_pkey_public_cmp, 0,
+
+    0, 0, 0,
+
+    poly1305_size,
+    0, 0,
+    0, 0, 0, 0, 0, 0, 0,
+
+    poly1305_key_free,
+    poly1305_pkey_ctrl,
+    0, 0
+};