2 * Copyright 2007-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib.h"
12 #include <openssl/evp.h>
13 #include "internal/asn1_int.h"
14 #include "internal/siphash.h"
15 #include "siphash_local.h"
16 #include "internal/evp_int.h"
19 * SIPHASH "ASN1" method. This is just here to indicate the maximum
20 * SIPHASH output length and to free up a SIPHASH key.
23 static int siphash_size(const EVP_PKEY *pkey)
25 return SIPHASH_MAX_DIGEST_SIZE;
28 static void siphash_key_free(EVP_PKEY *pkey)
30 ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey);
34 OPENSSL_cleanse(os->data, os->length);
35 ASN1_OCTET_STRING_free(os);
39 static int siphash_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
41 /* nothing (including ASN1_PKEY_CTRL_DEFAULT_MD_NID), is supported */
45 static int siphash_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
47 return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b));
50 static int siphash_set_priv_key(EVP_PKEY *pkey, const unsigned char *priv,
53 ASN1_OCTET_STRING *os;
55 if (pkey->pkey.ptr != NULL || len != SIPHASH_KEY_SIZE)
58 os = ASN1_OCTET_STRING_new();
62 if (!ASN1_OCTET_STRING_set(os, priv, len)) {
63 ASN1_OCTET_STRING_free(os);
71 static int siphash_get_priv_key(const EVP_PKEY *pkey, unsigned char *priv,
74 ASN1_OCTET_STRING *os = (ASN1_OCTET_STRING *)pkey->pkey.ptr;
77 *len = SIPHASH_KEY_SIZE;
81 if (os == NULL || *len < SIPHASH_KEY_SIZE)
84 memcpy(priv, ASN1_STRING_get0_data(os), ASN1_STRING_length(os));
85 *len = SIPHASH_KEY_SIZE;
90 const EVP_PKEY_ASN1_METHOD siphash_asn1_meth = {
96 "OpenSSL SIPHASH method",
98 0, 0, siphash_pkey_public_cmp, 0,
119 siphash_set_priv_key,
121 siphash_get_priv_key,