From fc3b3ebffc676e101ca189a9002efb4117913b15 Mon Sep 17 00:00:00 2001
From: David Phillips <david@sighup.nz>
Date: Sun, 1 Oct 2017 22:25:26 +1300
Subject: Add NIH SHA1 implementation mockup for porting

Mocked this up in host code to become familiar with the algorithm, and
to iron out most bugs before writing/porting to OpenCL.

For laughs, I switched sand-leek to use this implementation instead of
OpenSSL's. Performance decrease is about 90% with no change in CFLAGS,
and about 60% with -O3 instead of -O2. Of course this holds no weight, since
the implementation is only meant to be ported to OpenCL and run on graphics
cards where SIMD will skyrocket performance.
---
 sha1.h | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 sha1.h

(limited to 'sha1.h')

diff --git a/sha1.h b/sha1.h
new file mode 100644
index 0000000..37dea22
--- /dev/null
+++ b/sha1.h
@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdint.h>
+
+struct sha_data {
+	uint32_t a;
+	uint32_t b;
+	uint32_t c;
+	uint32_t d;
+	uint32_t e;
+	uint64_t len;
+	size_t data_len;
+	uint8_t data[64];
+};
+void sha_init(struct sha_data*);
+void sha_update(struct sha_data*, void *, size_t);
+void sha_final(unsigned char*, struct sha_data*);
+
-- 
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