kome::core::Sha1 Class Reference

the class computing SHA1 hash More...

#include <Sha1.h>

Classes
class	Sha1Context
	SHA1 context. More...

Static Public Member Functions
static std::string	transformData (void *src, const unsigned int length)
	transform data More...
static std::string	transformFile (const char *path)
	transform More...

Static Protected Member Functions
static unsigned long	f (const long t, const unsigned long b, const unsigned long c, const unsigned long d)
	logical function used in SHA1 More...
static unsigned long	K (const long t)
	constant word used in SHA1 More...

Detailed Description

the class computing SHA1 hash

Definition at line 22 of file Sha1.h.

Member Function Documentation

static unsigned long kome::core::Sha1::f ( const long  t, const unsigned long  b, const unsigned long  c, const unsigned long  d  )

staticprotected

logical function used in SHA1

Parameters

[in]	t	t count
[in]	b	variable B
[in]	c	variable C
[in]	d	variable D

Returns

computed value

Definition at line 28 of file Sha1.cpp.

                                                                                                         {
    if( t < 20 ) {
        return ( ( b & c ) | ( ~b & d ) );
    }
    if( t < 40 ) {
        return ( b ^ c ^ d );
    }
    if( t < 60 ) {
        return ( ( b & c ) | ( b & d ) | ( c & d ) );
    }
    if( t < 80 ) {
        return ( b ^ c ^ d );
    }
    return 0;
}

static unsigned long kome::core::Sha1::K ( const long  t )

staticprotected

constant word used in SHA1

Parameters

[in]

t

t count

Returns

constant word

Definition at line 45 of file Sha1.cpp.

                                    {
    if( t < 20 ) {
        return 0x5A827999;
    }
    if( t < 40 ) {
        return 0x6ED9EBA1;
    }
    if( t < 60 ) {
        return 0x8F1BBCDC;
    }
    if( t < 80 ) {
        return 0xCA62C1D6;
    }
    return 0;
}

static std::string kome::core::Sha1::transformData ( void *  src, const unsigned int  length  )

static

transform data

Parameters

[in]	src	source data
[in]	length	data length

Returns

SHA-1 string

Definition at line 62 of file Sha1.cpp.

                                                                    {
    // cast
    unsigned char* uc = (unsigned char*)src;

    // context
    Sha1Context context;
    context.appendMessage( uc, length );
    context.finish();

    // get string
    std::string s;
    for( unsigned int i = 0; i < 5; i++ ) {
        s.append( FMT( "%08x", context.m_h[ i ] ) );
    }

    return s;
}

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static std::string kome::core::Sha1::transformFile ( const char *  path )

static

transform

Parameters

[in]

path

file path

Returns

SHA-1 string

Definition at line 81 of file Sha1.cpp.

                                                {
    // string
    std::string s;

    // open the file
    FILE* fp = fileopen( path, "rb" );
    if( fp == NULL ) {
        LOG_ERROR( FMT( "Failed to open the file. [%s]", path ) );
        return s;
    }

    // context
    Sha1Context context;

    // read the file
    unsigned char buff[ 0x1000 ];
    int readSize = 0;
    while( ( readSize = fread( buff, 1, 0x1000, fp ) ) > 0 ) {
        context.appendMessage( buff, readSize );
    }
    context.finish();

    // close file
    fclose( fp );

    // get string
    for( unsigned int i = 0; i < 5; i++ ) {
        s.append( FMT( "%08x", context.m_h[ i ] ) );
    }

    return s;
}

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The documentation for this class was generated from the following files:

• CoreToolkits/Sha1.h
• CoreToolkits/Sha1.cpp