1 files changed, 65 insertions, 0 deletions
diff --git a/sys/lib/libsa/hmac_sha1.c b/sys/lib/libsa/hmac_sha1.c
new file mode 100644
index 00000000000..02e459fceeb
--- /dev/null
+++ b/sys/lib/libsa/hmac_sha1.c
@@ -0,0 +1,65 @@
+/*	$OpenBSD: hmac_sha1.c,v 1.1 2012/10/09 12:36:50 jsing Exp $	*/
+
+/*-
+ * Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <sys/param.h>
+
+#include <lib/libsa/stand.h>
+
+#include "hmac_sha1.h"
+
+/*
+ * HMAC-SHA-1 (from RFC 2202).
+ */
+void
+hmac_sha1(const u_int8_t *text, size_t text_len, const u_int8_t *key,
+    size_t key_len, u_int8_t digest[SHA1_DIGEST_LENGTH])
+{
+	SHA1_CTX ctx;
+	u_int8_t k_pad[SHA1_BLOCK_LENGTH];
+	u_int8_t tk[SHA1_DIGEST_LENGTH];
+	int i;
+
+	if (key_len > SHA1_BLOCK_LENGTH) {
+		SHA1Init(&ctx);
+		SHA1Update(&ctx, key, key_len);
+		SHA1Final(tk, &ctx);
+
+		key = tk;
+		key_len = SHA1_DIGEST_LENGTH;
+	}
+
+	bzero(k_pad, sizeof k_pad);
+	bcopy(key, k_pad, key_len);
+	for (i = 0; i < SHA1_BLOCK_LENGTH; i++)
+		k_pad[i] ^= 0x36;
+
+	SHA1Init(&ctx);
+	SHA1Update(&ctx, k_pad, SHA1_BLOCK_LENGTH);
+	SHA1Update(&ctx, text, text_len);
+	SHA1Final(digest, &ctx);
+
+	bzero(k_pad, sizeof k_pad);
+	bcopy(key, k_pad, key_len);
+	for (i = 0; i < SHA1_BLOCK_LENGTH; i++)
+		k_pad[i] ^= 0x5c;
+
+	SHA1Init(&ctx);
+	SHA1Update(&ctx, k_pad, SHA1_BLOCK_LENGTH);
+	SHA1Update(&ctx, digest, SHA1_DIGEST_LENGTH);
+	SHA1Final(digest, &ctx);
+}