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ssl_mdc2 ()
  • >> ssl_mdc2 (3) ( Разные man: Библиотечные вызовы )
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    NAME

    MDC2, MDC2_Init, MDC2_Update, MDC2_Final - MDC2 hash function
     
    

    SYNOPSIS

     #include <openssl/mdc2.h>
    
    
    
     unsigned char *MDC2(const unsigned char *d, unsigned long n,
                      unsigned char *md);
    
    
    
     void MDC2_Init(MDC2_CTX *c);
     void MDC2_Update(MDC2_CTX *c, const unsigned char *data,
                      unsigned long len);
     void MDC2_Final(unsigned char *md, MDC2_CTX *c);
    
    
    
     

    DESCRIPTION

    MDC2 is a method to construct hash functions with 128 bit output from block ciphers. These functions are an implementation of MDC2 with DES.

    MDC2() computes the MDC2 message digest of the n bytes at d and places it in md (which must have space for MDC2_DIGEST_LENGTH == 16 bytes of output). If md is NULL, the digest is placed in a static array.

    The following functions may be used if the message is not completely stored in memory:

    MDC2_Init() initializes a MDC2_CTX structure.

    MDC2_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).

    MDC2_Final() places the message digest in md, which must have space for MDC2_DIGEST_LENGTH == 16 bytes of output, and erases the MDC2_CTX.

    Applications should use the higher level functions EVP_DigestInit(3) etc. instead of calling the hash functions directly.  

    RETURN VALUES

    MDC2() returns a pointer to the hash value.

    MDC2_Init(), MDC2_Update() and MDC2_Final() do not return values.  

    CONFORMING TO

    ISO/IEC 10118-2, with DES  

    SEE ALSO

    sha(3), EVP_DigestInit(3)  

    HISTORY

    MDC2(), MDC2_Init(), MDC2_Update() and MDC2_Final() are available since SSLeay 0.8.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    CONFORMING TO
    SEE ALSO
    HISTORY


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