First Kindle 4 PC solution

skindle/sha1.h

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+/*
+ sha1.h: Implementation of SHA-1 Secure Hash Algorithm-1
+
+ Based upon: NIST FIPS180-1 Secure Hash Algorithm-1
+   http://www.itl.nist.gov/fipspubs/fip180-1.htm
+
+ Non-official Japanese Translation by HIRATA Yasuyuki:
+   http://yasu.asuka.net/translations/SHA-1.html
+
+ Copyright (C) 2002 vi@nwr.jp. All rights reserved.
+
+ This software is provided 'as-is', without any express or implied
+ warranty. In no event will the authors be held liable for any damages
+ arising from the use of this software.
+
+ Permission is granted to anyone to use this software for any purpose,
+ including commercial applications, and to alter it and redistribute it
+ freely, subject to the following restrictions:
+
+ 1. The origin of this software must not be misrepresented; you must not
+    claim that you wrote the original software. If you use this software
+    in a product, an acknowledgement in the product documentation would be
+    appreciated but is not required.
+ 2. Altered source versions must be plainly marked as such, and must not be
+    misrepresented as beging the original software.
+ 3. This notice may not be removed or altered from any source distribution.
+
+ Note:
+   The copyright notice above is copied from md5.h by L. Petet Deutsch
+   <ghost@aladdin.com>. Thank him since I'm not a good speaker of English. :)
+ */
+#ifndef	SHA1_H
+#define	SHA1_H
+
+typedef	unsigned int	sha1_word_t;	/* 32bits unsigned integer */
+typedef unsigned char	sha1_byte_t;	/* 8bits unsigned integer */
+#define	BITS		8
+
+/* Define the state of SHA-1 algorithm */
+typedef struct {
+  sha1_byte_t	sha1_buf[64];	/* 512 bits */
+  int		sha1_count;	/* How many bytes are used */
+  sha1_word_t	sha1_size1;		/* Length counter Lower Word */
+  sha1_word_t	sha1_size2;		/* Length counter Upper Word */
+  sha1_word_t	sha1_h[5];		/* Hash output */
+} sha1_state_s;
+#define	SHA1_OUTPUT_SIZE	20	/* in bytes */
+
+/* External Functions */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* Initialize SHA-1 algorithm */
+void	sha1_init(sha1_state_s *pms);
+
+/* Append a string to SHA-1 algorithm */
+void	sha1_update(sha1_state_s *pms, sha1_byte_t *input_buffer, int length);
+
+/* Finish the SHA-1 algorithm and return the hash */
+void	sha1_finish(sha1_state_s *pms, sha1_byte_t output[SHA1_OUTPUT_SIZE]);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif