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RIPEMD160_Final ()
  • >> RIPEMD160_Final (3) ( FreeBSD man: Библиотечные вызовы )
  • RIPEMD160_Final (3) ( Разные man: Библиотечные вызовы )

  • BSD mandoc
     

    NAME

    
    
    RIPEMD160_Init
    
     
    RIPEMD160_Update
    
     
    RIPEMD160_Final
    
     
    RIPEMD160_End
    
     
    RIPEMD160_File
    
     
    RIPEMD160_FileChunk
    
     
    RIPEMD160_Data
    
     - calculate the RIPEMD160 message digest
    
     
    

    LIBRARY

    Lb libmd
    
     
    

    SYNOPSIS

       #include <sys/types.h>
       #include <ripemd.h>
    void RIPEMD160_Init (RIPEMD160_CTX *context);
    void RIPEMD160_Update (RIPEMD160_CTX *context const unsigned char *data unsigned int len);
    void RIPEMD160_Final (unsigned char digest[20] RIPEMD160_CTX *context);
    char * RIPEMD160_End (RIPEMD160_CTX *context char *buf);
    char * RIPEMD160_File (const char *filename char *buf);
    char * RIPEMD160_FileChunk (const char *filename char *buf off_t offset off_t length);
    char * RIPEMD160_Data (const unsigned char *data unsigned int len char *buf);
     

    DESCRIPTION

    The RIPEMD160_ functions calculate a 160-bit cryptographic checksum (digest) for any number of input bytes. A cryptographic checksum is a one-way hash function; that is, it is computationally impractical to find the input corresponding to a particular output. This net result is a ``fingerprint'' of the input-data, which does not disclose the actual input.

    The RIPEMD160_Init (,);
    RIPEMD160_Update (,);
    and RIPEMD160_Final ();
    functions are the core functions. Allocate an Vt RIPEMD160_CTX , initialize it with RIPEMD160_Init (,);
    run over the data with RIPEMD160_Update (,);
    and finally extract the result using RIPEMD160_Final (.);

    The RIPEMD160_End ();
    function is a wrapper for RIPEMD160_Final ();
    which converts the return value to a 41-character (including the terminating '\0') ASCII string which represents the 160 bits in hexadecimal.

    The RIPEMD160_File ();
    function calculates the digest of a file, and uses RIPEMD160_End ();
    to return the result. If the file cannot be opened, a null pointer is returned. The RIPEMD160_FileChunk ();
    function is similar to RIPEMD160_File (,);
    but it only calculates the digest over a byte-range of the file specified, starting at Fa offset and spanning Fa length bytes. If the Fa length parameter is specified as 0, or more than the length of the remaining part of the file, RIPEMD160_FileChunk ();
    calculates the digest from Fa offset to the end of file. The RIPEMD160_Data ();
    function calculates the digest of a chunk of data in memory, and uses RIPEMD160_End ();
    to return the result.

    When using RIPEMD160_End (,);
    RIPEMD160_File (,);
    or RIPEMD160_Data (,);
    the Fa buf argument can be a null pointer, in which case the returned string is allocated with malloc(3) and subsequently must be explicitly deallocated using free(3) after use. If the Fa buf argument is non-null it must point to at least 41 characters of buffer space.  

    SEE ALSO

    md2(3), md4(3), md5(3), sha(3)  

    HISTORY

    These functions appeared in Fx 4.0 .  

    AUTHORS

    The core hash routines were implemented by Eric Young based on the published RIPEMD160 specification.  

    BUGS

    No method is known to exist which finds two files having the same hash value, nor to find a file with a specific hash value. There is on the other hand no guarantee that such a method does not exist.


     

    Index

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    LIBRARY
    SYNOPSIS
    DESCRIPTION
    SEE ALSO
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    AUTHORS
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