forgot -kb, remove openssl/ssl conditional
diff --git a/hmac.c b/hmac.c
new file mode 100644
index 0000000..fe53aa4
--- /dev/null
+++ b/hmac.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2000 Markus Friedl. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by Markus Friedl.
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "includes.h"
+RCSID("$Id: hmac.c,v 1.2 2000/04/12 09:39:10 markus Exp $");
+
+#include "xmalloc.h"
+#include "ssh.h"
+#include "getput.h"
+
+#include <openssl/hmac.h>
+
+unsigned char *
+hmac(
+ EVP_MD *evp_md,
+ unsigned int seqno,
+ unsigned char *data, int datalen,
+ unsigned char *key, int keylen)
+{
+ HMAC_CTX c;
+ static unsigned char m[EVP_MAX_MD_SIZE];
+ unsigned char b[4];
+
+ if (key == NULL)
+ fatal("hmac: no key");
+ HMAC_Init(&c, key, keylen, evp_md);
+ PUT_32BIT(b, seqno);
+ HMAC_Update(&c, b, sizeof b);
+ HMAC_Update(&c, data, datalen);
+ HMAC_Final(&c, m, NULL);
+ HMAC_cleanup(&c);
+ return(m);
+}