1 files changed, 61 insertions, 0 deletions
diff --git a/crypto/sha1.h b/crypto/sha1.h
new file mode 100644
index 0000000..58817ce
--- /dev/null
+++ b/crypto/sha1.h
@@ -0,0 +1,61 @@
+/*
+ *  sha1.h
+ *
+ *  Description:
+ *      This is the header file for code which implements the Secure
+ *      Hashing Algorithm 1 as defined in FIPS PUB 180-1 published
+ *      April 17, 1995.
+ *
+ *      Many of the variable names in this code, especially the
+ *      single character names, were used because those were the names
+ *      used in the publication.
+ *
+ *      Please read the file sha1.c for more information.
+ *
+ */
+
+#ifndef _SHA1_H_
+#define _SHA1_H_
+
+#include <stdint.h>
+
+#define SHA1HashSize 20
+
+enum
+{
+  shaSuccess = 0,
+  shaNull,            /* Null pointer parameter */
+  shaInputTooLong,    /* input data too long */
+  shaStateError       /* called Input after Result */
+};
+
+#define FLAG_COMPUTED   1
+#define FLAG_CORRUPTED  2
+
+/*
+ * Data structure holding contextual information about the SHA-1 hash
+ */
+struct sha1
+{
+  uint8_t  Message_Block[64];       /* 512-bit message blocks         */
+  uint32_t Intermediate_Hash[5];    /* Message Digest                 */
+  uint32_t Length_Low;              /* Message length in bits         */
+  uint32_t Length_High;             /* Message length in bits         */
+  uint16_t Message_Block_Index;     /* Index into message block array */
+  uint8_t  flags;
+};
+
+
+
+/* 
+ * Public API
+ */
+int sha1_reset (struct sha1* context);
+int sha1_input (struct sha1* context, const uint8_t* message_array, unsigned length);
+int sha1_result(struct sha1* context, uint8_t Message_Digest[SHA1HashSize]);
+
+
+
+#endif /* #ifndef _SHA1_H_ */
+
+