Class for encoding/decoding algorithms. More...
#include <utilities/string_utilities.h>
Static Public Member Functions | |
| static void | XOREncode (char *OutputBuffer, std::size_t BufferSize, char *CodeWord) |
| static void | XORDecode (char *InputBuffer, std::size_t BufferSize, char *CodeWord) |
| static void | EncodeBase64 (const char *bf, std::size_t count, char *outbf) |
| template<class str_type > | |
| static str_type | EncodeBase64 (const char *bf, std::size_t count) |
| static void | DecodeBase64 (const char *InBuf, char *OutBuf, std::size_t &Count) |
| template<class str_type > | |
| static str_type | DecodeBase64 (const char *bf) |
| static void | md5 (const char *Data, std::size_t DataLength, char *Hash) |
| template<class str_type > | |
| static void | md5 (const char *Data, std::size_t DataLength) |
Detailed Description
Class for encoding/decoding algorithms.
Definition at line 740 of file string_utilities.h.
Member Function Documentation
| void nitro::Encoders::DecodeBase64 | ( | const char * | InBuf, | |
| char * | OutBuf, | |||
| std::size_t & | Count | |||
| ) | [static] |
Function to decode data from base64.
- Parameters:
-
InBuf - Buffer to decode. OutBuf - Buffer to store result. Count - Size of output buffer.
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 341 of file string_utilities.cpp.
References nitro::exception::code(), and nitro::exception::what().
Referenced by DecodeBase64().
{
try
{
std::string EncodeTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
char a , b , c , d;
char x , y , z;
int t = 0;
if( std::string( InBuf ) == "" )
{
Count = 0;
return;
}
if( strlen( InBuf ) % 4 != 0 )
{
throw( std::string( "Illegal input string" ) );
}
for( std::size_t i( 0 ) ; i < strlen( InBuf ) / 4 ; i++ )
{
std::size_t r;
r = EncodeTable.find( InBuf[ 4 * i + 0 ] , 0 );
a = ( r == std::string::npos ? -1 : ( char ) r );
r = EncodeTable.find( InBuf[ 4 * i + 1 ] , 0 );
b = ( r == std::string::npos ? -1 : ( char ) r );
r = EncodeTable.find( InBuf[ 4 * i + 2 ] , 0 );
c = ( r == std::string::npos ? -1 : ( char ) r );
r = EncodeTable.find( InBuf[ 4 * i + 3 ] , 0 );
d = ( r == std::string::npos ? -1 : ( char ) r );
if( ( a == -1 ) || ( b == -1 ) || ( c == -1 ) || ( d == -1 ) || ( a == 64 ) || ( b == 64 ) )
{
throw( std::string( "An error occured while decoding" ) );
}
if( c == 64 )
{
x = ( a << 2 ) | ( b >> 4 );
OutBuf[ t++ ] = x;
}
else if( d == 64 )
{
x = ( a << 2 ) | ( b >> 4 );
y = ( b << 4 ) | ( c >> 2 );
OutBuf[ t++ ] = x;
OutBuf[ t++ ] = y;
}
else
{
x = ( a << 2 ) | ( b >> 4 );
y = ( b << 4 ) | ( c >> 2 );
z = ( c << 6 ) | d;
OutBuf[ t++ ] = x;
OutBuf[ t++ ] = y;
OutBuf[ t++ ] = z;
}
}
Count = t;
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::DecodeBase64( const char * InBuf , char * OutBuf , std::size_t & Count )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::DecodeBase64( const char * InBuf , char * OutBuf , std::size_t & Count )::An error occured while encoding string to base64" ) , 1 ) );
}
}
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template<class str_type >
| str_type nitro::Encoders::DecodeBase64 | ( | const char * | bf | ) | [static] |
Function to decode data from base64.
- Parameters:
-
bf - Buffer to decode.
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 987 of file string_utilities.h.
References nitro::exception::code(), DecodeBase64(), and nitro::exception::what().
{
try
{
str_type out;
//Pointer< char > OutBuffer( strlen( bf ) );
char * OutBuffer( new char[ strlen( bf ) ] );
memset( OutBuffer , 0 , strlen( bf ) );
std::size_t Count;
DecodeBase64( bf , OutBuffer , Count );
out.AppendData( OutBuffer , Count );
delete [] OutBuffer;
return( out );
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::DecodeBase64( const char * bf )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::DecodeBase64( const char * bf )::An error occured" ) , 0 ) );
}
}
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| void nitro::Encoders::EncodeBase64 | ( | const char * | bf, | |
| std::size_t | count, | |||
| char * | outbf | |||
| ) | [static] |
Function encodes buffer in base64.
- Parameters:
-
bf - Encoding buffer. count - Size of buffer. outbf - Encoded string.
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 278 of file string_utilities.cpp.
References nitro::exception::code(), and nitro::exception::what().
Referenced by EncodeBase64().
{
try
{
std::string EncodeTable = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
std::string Sout = "";
unsigned char a , b , c , i;
for( std::size_t k( 0 ) ; k < count ; k++ )
{
if( count - k == 1 )
{
a = bf[ k ];
b = 0;
i = a >> 2;
Sout += EncodeTable.substr( i , 1 );
i = ( ( a & 3 ) << 4 ) | ( b >> 4 );
Sout += EncodeTable.substr( i , 1 );
Sout += EncodeTable.substr( 64 , 1 );
Sout += EncodeTable.substr( 64 , 1 );
}
else if( count - k == 2 )
{
a = bf[ k ];
b = bf[ ++k ];
c = 0;
i = a >> 2;
Sout += EncodeTable.substr( i , 1 );
i = ( ( a & 3 ) << 4 ) | ( b >> 4 );
Sout += EncodeTable.substr( i , 1 );
i = ( ( b & 15 ) << 2 ) | ( c >> 6 );
Sout += EncodeTable.substr( i , 1 );
Sout += EncodeTable.substr( 64 , 1 );
}
else
{
a = bf[ k ];
b = bf[ ++k ];
c = bf[ ++k ];
i = a >> 2;
Sout += EncodeTable.substr( i , 1 );
i = ( ( a & 3 ) << 4 ) | ( b >> 4 );
Sout += EncodeTable.substr( i , 1 );
i = ( ( b & 15 ) << 2 ) | ( c >> 6 );
Sout += EncodeTable.substr( i , 1 );
i = c & 63;
Sout += EncodeTable.substr( i , 1 );
}
}
strcpy( outbf , Sout.c_str() );
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::EncodeBase64( const char * bf , std::size_t count , char * outbf )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::EncodeBase64( const char * bf , std::size_t count , char * outbf )::An error occured while encoding string to base64" ) , 1 ) );
}
}
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template<class str_type >
| str_type nitro::Encoders::EncodeBase64 | ( | const char * | bf, | |
| std::size_t | count | |||
| ) | [static] |
Function encodes data in base64.
- Parameters:
-
bf - Buffer to be encoded. count - Size of buffer (in bytes).
- Returns:
- Encoded data.
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 960 of file string_utilities.h.
References nitro::exception::code(), EncodeBase64(), and nitro::exception::what().
{
try
{
str_type out;
//Pointer< char > OutBuffer( ( std::size_t )( count * 1.5 ) );
char * OutBuffer( new char[ ( std::size_t )( count * 1.5 ) ] );
memset( OutBuffer , 0 , ( std::size_t )( count * 1.5 ) );
EncodeBase64( bf , count , OutBuffer );
out.AppendData( OutBuffer , ( std::size_t )( count * 1.5 ) );
delete [] OutBuffer;
return( out );
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::EncodeBase64( const char * bf , std::size_t count )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::EncodeBase64( const char * bf , std::size_t count )::An error occured" ) , 0 ) );
}
}
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template<class str_type >
| void nitro::Encoders::md5 | ( | const char * | Data, | |
| std::size_t | DataLength | |||
| ) | [static] |
Function calculates md5 hash.
- Parameters:
-
Data - Data to be hashed. DataLength - Data size.
- Returns:
- Hash (size of the buffer must be at least 33 bytes).
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 1017 of file string_utilities.h.
References nitro::exception::code(), md5(), and nitro::exception::what().
{
try
{
char Hash[ 33 ];
md5( Data , DataLength , Hash );
return( str_type( Hash ) );
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::md5( const char * Data , std::size_t DataLength )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::md5( const char * Data , std::size_t DataLength )::An error occured" ) , 0 ) );
}
}
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| void nitro::Encoders::md5 | ( | const char * | Data, | |
| std::size_t | DataLength, | |||
| char * | Hash | |||
| ) | [static] |
Function calculates md5 hash.
- Parameters:
-
Data - Data to be hashed. DataLength - Data size. Hash - Hash (size of the buffer must be at least 33 bytes).
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 726 of file string_utilities.cpp.
References nitro::exception::code(), nitro::MDFinal(), nitro::MDInit(), nitro::MDUpdate(), and nitro::exception::what().
Referenced by md5().
{
try
{
MD5_CTX Context;
UC Digest[ 16 ];
MDInit( & Context );
MDUpdate( & Context , ( UC * )Data , DataLength );
MDFinal( Digest , & Context );
// Формируем возвращаемую строку
memset( Hash , 0 , 32 );
for( std::size_t i( 0 ) ; i < 16 ; i++ )
{
sprintf( & Hash[ i * 2 ] , "%02x" , Digest[ i ] );
}
Hash[ 32 ] = '\0';
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::md5( const char * Data , std::size_t DataLength , char * Hash )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::md5( const char * Data , std::size_t DataLength , char * Hash )::An error occured while encoding string to base64" ) , 1 ) );
}
}
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| void nitro::Encoders::XORDecode | ( | char * | InputBuffer, | |
| std::size_t | BufferSize, | |||
| char * | CodeWord | |||
| ) | [static] |
Function decodes string from XORed string.
- Parameters:
-
InputBuffer - Buffer to decode. BufferSize - Size of buffer. CodeWord - Password to decode.
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 254 of file string_utilities.cpp.
References nitro::exception::code(), and nitro::exception::what().
{
try
{
for( std::size_t i( 0 ) ; i < BufferSize ; i++ )
{
InputBuffer[ i ] ^= CodeWord[ i % strlen( CodeWord ) ];
for( int j( ( int )strlen( CodeWord ) - 1 ) ; j >= 0 ; j-- )
{
InputBuffer[ i ] ^= CodeWord[ j ];
}
}
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::XORDecode( char * InputBuffer , std::size_t BufferSize , char * CodeWord )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::XORDecode( char * InputBuffer , std::size_t BufferSize , char * CodeWord )::An error occured" ) , 1 ) );
}
}
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| void nitro::Encoders::XOREncode | ( | char * | OutputBuffer, | |
| std::size_t | BufferSize, | |||
| char * | CodeWord | |||
| ) | [static] |
Functione encodes string using simple XOR algorithm.
- Parameters:
-
OutputBuffer - Buffer to encode. BufferSize - Size of buffer. CodeWord - Password to XOR with.
- Exceptions:
-
nitro::exception Throws exception with error description.
Definition at line 230 of file string_utilities.cpp.
References nitro::exception::code(), and nitro::exception::what().
{
try
{
for( std::size_t i( 0 ) ; i < BufferSize ; i++ )
{
for( std::size_t j( 0 ) ; j < strlen( CodeWord ) ; j++ )
{
OutputBuffer[ i ] ^= CodeWord[ j ];
}
OutputBuffer[ i ] ^= CodeWord[ i % strlen( CodeWord ) ];
}
}
catch( nitro::exception e )
{
throw( nitro::exception( std::string( "Encoders::XOREncode( char * OutputBuffer , std::size_t BufferSize , char * CodeWord )::" ) + e.what() , e.code() ) );
}
catch( ... )
{
throw( nitro::exception( std::string( "Encoders::XOREncode( char * OutputBuffer , std::size_t BufferSize , char * CodeWord )::An error occured" ) , 1 ) );
}
}
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The documentation for this class was generated from the following files:
- utilities/string_utilities.h
- utilities/string_utilities.cpp
