Hashes

MD5 Digest Functions. More...

Collaboration diagram for Hashes:

Data Structures
struct	_MD5CONTEXT
struct	MD5CONTEXT
	MD5 context structure. More...
Defines
#define	byteReverse(buf, len)
#define	F1(x, y, z)   (z ^ (x & (y ^ z)))
#define	F2(x, y, z)   F1(z, x, y)
#define	F3(x, y, z)   (x ^ y ^ z)
#define	F4(x, y, z)   (y ^ (x | ~z))
#define	MD5STEP(f, w, x, y, z, data, s)   ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
Typedefs
typedef struct _MD5CONTEXT	MD5CONTEXT
Functions
void	NutMD5Init (MD5CONTEXT *context)
	Start MD5 accumulation.
void	NutMD5Update (MD5CONTEXT *context, uint8_t const *buf, uint32_t len)
	Update MD5 context.
void	NutMD5Final (MD5CONTEXT *context, uint8_t digest[16])
	Final wrapup, calculate MD5 digest.

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Detailed Description

MD5 Digest Functions.

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Define Documentation

#define byteReverse	(		buf,
			len
	)

Referenced by NutMD5Final(), and NutMD5Update().

#define F1	(		x,
			y,
			z
	)		(z ^ (x & (y ^ z)))

#define F2	(		x,
			y,
			z
	)		F1(z, x, y)

#define F3	(		x,
			y,
			z
	)		(x ^ y ^ z)

#define F4	(		x,
			y,
			z
	)		(y ^ (x | ~z))

#define MD5STEP	(		f,
			w,
			x,
			y,
			z,
			data,
			s
	)		( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )

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Typedef Documentation

typedef struct _MD5CONTEXT MD5CONTEXT

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Function Documentation

void NutMD5Init

(

MD5CONTEXT *

context

)

Start MD5 accumulation.

Start MD5 accumulation, set bit count to 0 and buffer to mysterious initialization constants. Call this function to initialize every new MD5 calculation.

Parameters:

context

Points to the md5 context buffer.

void NutMD5Update	(	MD5CONTEXT *	context,
		uint8_t const *	buf,
		uint32_t	len
	)

Update MD5 context.

Update context to reflect the concatenation of another data buffer.

Parameters:

context	Points to the md5 context buffer.
buf	Points to the data buffer
len	Length of the data buffer

References byteReverse, and memcpy().

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void NutMD5Final	(	MD5CONTEXT *	context,
		uint8_t	digest[16]
	)

Final wrapup, calculate MD5 digest.

Final wrapup - pad to 64-byte boundary with the bit pattern 1 0* (64-bit count of bits processed, MSB-first) Fill in the digest into digest buffer

Parameters:

context	Points to the md5 context buffer.
digest	Points to the digest buffer, which must be 16 bytes long

References byteReverse, memcpy(), and memset().

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