Crypt_RSA
[ class tree: Crypt_RSA ] [ index: Crypt_RSA ] [ all elements ]
Packages:
Crypt_RSA


Classes:
Crypt_RSA
Crypt_RSA_ErrorHandler
Crypt_RSA_Key
Crypt_RSA_KeyPair
Crypt_RSA_MathLoader
Crypt_RSA_Math_BCMath
Crypt_RSA_Math_BigInt
Crypt_RSA_Math_GMP
Files:
BCMath.php
BigInt.php
ErrorHandler.php
GMP.php
Key.php
KeyPair.php
MathLoader.php
RSA.php
web_interface.php

Class: Crypt_RSA_Math_BCMath

Source Location: /Crypt_RSA-1.0.0/RSA/Math/BCMath.php

Class Overview




Crypt_RSA_Math_BCMath class.




Author(s):






        
          
              

Version:


    
  
  • @package_version@
    • 




Copyright:


    
  
  • 2005 Alexander Valyalkin
    • 







Variables






Methods
















Inherited Variables





Inherited Methods














Class Details



[line 43]

Crypt_RSA_Math_BCMath class.
Provides set of math functions, which are used by Crypt_RSA package  This class is a wrapper for PHP BCMath extension.  See http://php.net/manual/en/ref.bc.php for details.









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Class Variables



	
	

	
$errstr =  ''

	
[line 51]

  error description


    

  • Access: public
    • 





  

	

  

    

      Type:  
      string
    

      

	



	
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Method Detail



	
	
Crypt_RSA_Math_BCMath (Constructor)   [line 164]

	

    

    

		Crypt_RSA_Math_BCMath Crypt_RSA_Math_BCMath(
)
    

    


	
		Crypt_RSA_Math_BCMath constructor.
Checks an existance of PHP BCMath extension.  On failure saves error description in $this->errstr


    

  • Access: public
    • 








        
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bin2int   [line 186]

	

    

    

		string bin2int(
string
$str)
    

    


	
		Transforms binary representation of large integer into its native form.
Example of transformation:     $str = "\x12\x34\x56\x78\x90";     $num = 0x9078563412;


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $str  
        — 
        
      

        

    


        
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bitLen   [line 395]

	

    

    

		int bitLen(
string
$num)
    

    


	
		Returns bit length of number $num


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

        

    


        
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bitOr   [line 421]

	

    

    

		string bitOr(
string
$num1, string
$num2, int
$start_pos)
    

    


	
		Calculates bitwise or of $num1 and $num2,  starting from bit $start_pos for number $num1


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num1  
        — 
        
      

          

        string  
        $num2  
        — 
        
      

          

        int  
        $start_pos  
        — 
        
      

        

    


        
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cmpAbs   [line 270]

	

    

    

		int cmpAbs(
string
$num1, string
$num2)
    

    


	
		Compares abs($num1) to abs($num2).
Returns:    -1, if abs($num1) < abs($num2)    0, if abs($num1) == abs($num2)    1, if abs($num1) > abs($num2)


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num1  
        — 
        
      

          

        string  
        $num2  
        — 
        
      

        

    


        
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dec   [line 323]

	

    

    

		string dec(
string
$num)
    

    


	
		Calculates $num - 1


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

        

    


        
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gcd   [line 348]

	

    

    

		string gcd(
string
$num1, string
$num2)
    

    


	
		Finds greatest common divider (GCD) of $num1 and $num2


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num1  
        — 
        
      

          

        string  
        $num2  
        — 
        
      

        

    


        
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getRand   [line 304]

	

    

    

		string getRand(
int
$bits_cnt, 
$random_generator, [
$is_set_higher_bit = false], string
$rnd_generator)
    

    


	
		Generates random number wich bit length $bits_cnt,  using $random_generator as random generator function.
If is_set_higher_bit != false, then higer bit of result  will be set to 1.


    

  • Access: public
    • 








        
Parameters:

    

    

          

        int  
        $bits_cnt  
        — 
        
      

          

        string  
        $rnd_generator  
        — 
        
      

          

          
        $random_generator  
        — 
        
      

          

          
        $is_set_higher_bit  
        — 
        
      

        

    


        
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getWrapperName   [line 470]

	

    

    

		string getWrapperName(
)
    

    


	
		Returns name of current wrapper


    

  • Return: name of current wrapper
    • 

  • Access: public
    • 








        
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int2bin   [line 207]

	

    

    

		string int2bin(
string
$num)
    

    


	
		Transforms large integer into binary representation.
Example of transformation:     $num = 0x9078563412;     $str = "\x12\x34\x56\x78\x90";


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

        

    


        
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invmod   [line 367]

	

    

    

		string invmod(
string
$num, string
$mod)
    

    


	
		Finds inverse number $inv for $num by modulus $mod, such as:      $inv * $num = 1 (mod $mod)


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

          

        string  
        $mod  
        — 
        
      

        

    


        
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isZero   [line 335]

	

    

    

		bool isZero(
string
$num)
    

    


	
		Returns true, if $num is equal to zero. Else returns false


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

        

    


        
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mul   [line 253]

	

    

    

		string mul(
string
$num1, string
$num2)
    

    


	
		Calculates $num1 * $num2


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num1  
        — 
        
      

          

        string  
        $num2  
        — 
        
      

        

    


        
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nextPrime   [line 282]

	

    

    

		string nextPrime(
string
$num)
    

    


	
		Finds next strong pseudoprime number, following after $num


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

        

    


        
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powmod   [line 226]

	

    

    

		string powmod(
string
$num, string
$pow, string
$mod)
    

    


	
		Calculates pow($num, $pow) (mod $mod)


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

          

        string  
        $pow  
        — 
        
      

          

        string  
        $mod  
        — 
        
      

        

    


        
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subint   [line 448]

	

    

    

		string subint(
string
$num, int
$start, int
$length)
    

    


	
		Returns part of number $num, starting at bit  position $start with length $length


    

  • Access: public
    • 








        
Parameters:

    

    

          

        string  
        $num  
        — 
        
      

          

        int  
        $start  
        — 
        start
      

          

        int  
        $length  
        — 
        length
      

        

    


        
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		    Documentation generated on Mon, 11 Mar 2019 14:20:35 -0400 by phpDocumentor 1.4.4. PEAR Logo Copyright ©  PHP Group 2004.