1 files changed, 40 insertions, 0 deletions
diff --git a/include/sha256.h b/include/sha256.h
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--- /dev/null
+++ b/include/sha256.h
@@ -0,0 +1,40 @@
+/*********************************************************************
+* Filename:   sha256.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 SHA256 implementation.
+*********************************************************************/
+
+#ifndef SHA256_H
+#define SHA256_H
+
+/*************************** HEADER FILES ***************************/
+#include <stddef.h>
+#include <stdint.h>
+
+/****************************** MACROS ******************************/
+#define SHA256_BLOCK_SIZE    32            // SHA256 outputs a 32 byte digest
+#define SHA256_DIGEST_LENGTH SHA256_BLOCK_SIZE
+#define SHA256_TOO_LARGE     "TOOLARGETOHASH"
+
+#undef SHA256_SHOW_ERRORS // for debugging
+
+/**************************** DATA TYPES ****************************/
+typedef unsigned char BYTE;             // 8-bit byte
+typedef uint32_t      WORD;             // 32-bit word
+
+typedef struct {
+	BYTE data[64];
+	WORD datalen;
+	uint64_t bitlen;
+	//unsigned long long bitlen;
+	WORD state[8];
+} SHA256_CTX;
+
+/*********************** FUNCTION DECLARATIONS **********************/
+void sha256_init(SHA256_CTX *);
+void sha256_update(SHA256_CTX *, const BYTE [], size_t);
+void sha256_final(SHA256_CTX *, BYTE []);
+char *sha256_digest_file(const char *);
+#endif   // SHA256_H