ripemd160_init(3) [freebsd man page]

RIPEMD(3)						   BSD Library Functions Manual 						 RIPEMD(3)

NAME

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

LIBRARY

     Message Digest (MD4, MD5, etc.) Support Library (libmd, -lmd)

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 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
     '') 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 offset and spanning length bytes.  If the length parameter is specified as 0, or more than the
     length of the remaining part of the file, RIPEMD160_FileChunk() calculates the digest from 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 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 buf argument is non-null it must
     point to at least 41 characters of buffer space.

SEE ALSO

     md4(3), md5(3), sha(3)

HISTORY

     These functions appeared in FreeBSD 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.

BSD
								  March 28, 2014							       BSD

Check Out this Related Man Page

ripemd(3SSL)                                                          OpenSSL                                                         ripemd(3SSL)

NAME

       RIPEMD160, RIPEMD160_Init, RIPEMD160_Update, RIPEMD160_Final - RIPEMD-160 hash function

SYNOPSIS

        #include <openssl/ripemd.h>

        unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
                         unsigned char *md);

        int RIPEMD160_Init(RIPEMD160_CTX *c);
        int RIPEMD160_Update(RIPEMD_CTX *c, const void *data,
                         unsigned long len);
        int RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);

DESCRIPTION

       RIPEMD-160 is a cryptographic hash function with a 160 bit output.

       RIPEMD160() computes the RIPEMD-160 message digest of the n bytes at d and places it in md (which must have space for
       RIPEMD160_DIGEST_LENGTH == 20 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:

       RIPEMD160_Init() initializes a RIPEMD160_CTX structure.

       RIPEMD160_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).

       RIPEMD160_Final() places the message digest in md, which must have space for RIPEMD160_DIGEST_LENGTH == 20 bytes of output, and erases the
       RIPEMD160_CTX.

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

RETURN VALUES

       RIPEMD160() returns a pointer to the hash value.

       RIPEMD160_Init(), RIPEMD160_Update() and RIPEMD160_Final() return 1 for success, 0 otherwise.

CONFORMING TO

       ISO/IEC 10118-3 (draft) (??)

SEE ALSO

       sha(3), hmac(3), EVP_DigestInit(3)

HISTORY

       RIPEMD160(), RIPEMD160_Init(), RIPEMD160_Update() and RIPEMD160_Final() are available since SSLeay 0.9.0.

1.0.1e                                                              2013-02-11                                                        ripemd(3SSL)

Linux and UNIX Man Pages

ripemd160_init(3) [freebsd man page]

Check Out this Related Man Page