1 files changed, 31 insertions, 0 deletions
diff --git a/librhash/sha1.h b/librhash/sha1.h
new file mode 100644
index 0000000..74b2f94
--- /dev/null
+++ b/librhash/sha1.h
@@ -0,0 +1,31 @@
+/* sha1.h */
+#ifndef SHA1_H
+#define SHA1_H
+#include "ustd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define sha1_block_size 64
+#define sha1_hash_size  20
+
+/* algorithm context */
+typedef struct sha1_ctx
+{
+	unsigned char message[sha1_block_size]; /* 512-bit buffer for leftovers */
+	uint64_t length;   /* number of processed bytes */
+	unsigned hash[5];  /* 160-bit algorithm internal hashing state */
+} sha1_ctx;
+
+/* hash functions */
+
+void rhash_sha1_init(sha1_ctx *ctx);
+void rhash_sha1_update(sha1_ctx *ctx, const unsigned char* msg, size_t size);
+void rhash_sha1_final(sha1_ctx *ctx, unsigned char* result);
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif /* __cplusplus */
+
+#endif /* SHA1_H */