1 files changed, 35 insertions, 0 deletions
diff --git a/lib/crypto-algorithms/sha1.h b/lib/crypto-algorithms/sha1.h
new file mode 100644
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+++ b/lib/crypto-algorithms/sha1.h
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+/*********************************************************************
+* Filename:   sha1.h
+* Author:     Brad Conte (brad AT bradconte.com)
+* Copyright:
+* Disclaimer: This code is presented "as is" without any guarantees.
+* Details:    Defines the API for the corresponding SHA1 implementation.
+*********************************************************************/
+
+#ifndef SHA1_H
+#define SHA1_H
+
+/*************************** HEADER FILES ***************************/
+#include <stddef.h>
+
+/****************************** MACROS ******************************/
+#define SHA1_BLOCK_SIZE 20              // SHA1 outputs a 20 byte digest
+
+/**************************** DATA TYPES ****************************/
+typedef unsigned char BYTE;             // 8-bit byte
+typedef unsigned int  WORD;             // 32-bit word, change to "long" for 16-bit machines
+
+typedef struct {
+	BYTE data[64];
+	WORD datalen;
+	unsigned long long bitlen;
+	WORD state[5];
+	WORD k[4];
+} SHA1_CTX;
+
+/*********************** FUNCTION DECLARATIONS **********************/
+void sha1_init(SHA1_CTX *ctx);
+void sha1_update(SHA1_CTX *ctx, const BYTE data[], size_t len);
+void sha1_final(SHA1_CTX *ctx, BYTE hash[]);
+
+#endif   // SHA1_H