replace openssl HMAC with an implementation based on our ssh_digest_*

ok and feedback djm@

1 files changed, 37 insertions, 0 deletions

diff --git a/usr.bin/ssh/hmac.h b/usr.bin/ssh/hmac.h
new file mode 100644
index 00000000000..2374a695579
--- /dev/null
+++ b/usr.bin/ssh/hmac.h
@@ -0,0 +1,37 @@
+/* $OpenBSD: hmac.h,v 1.6 2014/01/27 18:58:14 markus Exp $ */
+/*
+ * Copyright (c) 2014 Markus Friedl.  All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef _HMAC_H
+#define _HMAC_H
+
+/* Returns the algorithm's digest length in bytes or 0 for invalid algorithm */
+size_t ssh_hmac_bytes(int alg);
+
+struct ssh_hmac_ctx;
+struct ssh_hmac_ctx *ssh_hmac_start(int alg);
+
+/* Sets the state of the HMAC or resets the state if key == NULL */
+int ssh_hmac_init(struct ssh_hmac_ctx *ctx, const void *key, size_t klen)
+	__attribute__((__bounded__(__buffer__, 2, 3)));
+int ssh_hmac_update(struct ssh_hmac_ctx *ctx, const void *m, size_t mlen)
+	__attribute__((__bounded__(__buffer__, 2, 3)));
+int ssh_hmac_update_buffer(struct ssh_hmac_ctx *ctx, const Buffer *b);
+int ssh_hmac_final(struct ssh_hmac_ctx *ctx, u_char *d, size_t dlen)
+	__attribute__((__bounded__(__buffer__, 2, 3)));
+void ssh_hmac_free(struct ssh_hmac_ctx *ctx);
+
+#endif /* _HMAC_H */