From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/hmac/hm_ameth.c | 125 ++++++++++++++++++++++++++++++++++
 1 file changed, 125 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/hmac/hm_ameth.c

(limited to 'openssl-1.1.0h/crypto/hmac/hm_ameth.c')

diff --git a/openssl-1.1.0h/crypto/hmac/hm_ameth.c b/openssl-1.1.0h/crypto/hmac/hm_ameth.c
new file mode 100644
index 0000000..78ae0ea
--- /dev/null
+++ b/openssl-1.1.0h/crypto/hmac/hm_ameth.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2007-2016 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"
+
+#define HMAC_TEST_PRIVATE_KEY_FORMAT
+
+/*
+ * HMAC "ASN1" method. This is just here to indicate the maximum HMAC output
+ * length and to free up an HMAC key.
+ */
+
+static int hmac_size(const EVP_PKEY *pkey)
+{
+    return EVP_MAX_MD_SIZE;
+}
+
+static void hmac_key_free(EVP_PKEY *pkey)
+{
+    ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey);
+    if (os) {
+        if (os->data)
+            OPENSSL_cleanse(os->data, os->length);
+        ASN1_OCTET_STRING_free(os);
+    }
+}
+
+static int hmac_pkey_ctrl(EVP_PKEY *pkey, int op, long arg1, void *arg2)
+{
+    switch (op) {
+    case ASN1_PKEY_CTRL_DEFAULT_MD_NID:
+        *(int *)arg2 = NID_sha256;
+        return 1;
+
+    default:
+        return -2;
+    }
+}
+
+static int hmac_pkey_public_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
+{
+    return ASN1_OCTET_STRING_cmp(EVP_PKEY_get0(a), EVP_PKEY_get0(b));
+}
+
+#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
+/*
+ * A bogus private key format for test purposes. This is simply the HMAC key
+ * with "HMAC PRIVATE KEY" in the headers. When enabled the genpkey utility
+ * can be used to "generate" HMAC keys.
+ */
+
+static int old_hmac_decode(EVP_PKEY *pkey,
+                           const unsigned char **pder, int derlen)
+{
+    ASN1_OCTET_STRING *os;
+    os = ASN1_OCTET_STRING_new();
+    if (os == NULL || !ASN1_OCTET_STRING_set(os, *pder, derlen))
+        goto err;
+    if (!EVP_PKEY_assign(pkey, EVP_PKEY_HMAC, os))
+        goto err;
+    return 1;
+
+ err:
+    ASN1_OCTET_STRING_free(os);
+    return 0;
+}
+
+static int old_hmac_encode(const EVP_PKEY *pkey, unsigned char **pder)
+{
+    int inc;
+    ASN1_OCTET_STRING *os = EVP_PKEY_get0(pkey);
+    if (pder) {
+        if (!*pder) {
+            *pder = OPENSSL_malloc(os->length);
+            if (*pder == NULL)
+                return -1;
+            inc = 0;
+        } else
+            inc = 1;
+
+        memcpy(*pder, os->data, os->length);
+
+        if (inc)
+            *pder += os->length;
+    }
+
+    return os->length;
+}
+
+#endif
+
+const EVP_PKEY_ASN1_METHOD hmac_asn1_meth = {
+    EVP_PKEY_HMAC,
+    EVP_PKEY_HMAC,
+    0,
+
+    "HMAC",
+    "OpenSSL HMAC method",
+
+    0, 0, hmac_pkey_public_cmp, 0,
+
+    0, 0, 0,
+
+    hmac_size,
+    0, 0,
+    0, 0, 0, 0, 0, 0, 0,
+
+    hmac_key_free,
+    hmac_pkey_ctrl,
+#ifdef HMAC_TEST_PRIVATE_KEY_FORMAT
+    old_hmac_decode,
+    old_hmac_encode
+#else
+    0, 0
+#endif
+};
-- 
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