NetBSD/lib/libcrypto/man/openssl_ripemd.3

.\"	$NetBSD: openssl_ripemd.3,v 1.8 2003/07/24 14:16:52 itojun Exp $
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.\"
.IX Title "ripemd 3"
.TH ripemd 3 "0.9.7b" "2000-02-26" "OpenSSL"
.UC
.SH "NAME"
\&\s-1RIPEMD160\s0, RIPEMD160_Init, RIPEMD160_Update, RIPEMD160_Final \-
\&\s-1RIPEMD-160\s0 hash function
.SH "LIBRARY"
libcrypto, -lcrypto
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/ripemd.h>
.Ve
.Vb 2
\& unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
\&                  unsigned char *md);
.Ve
.Vb 4
\& void RIPEMD160_Init(RIPEMD160_CTX *c);
\& void RIPEMD160_Update(RIPEMD_CTX *c, const void *data,
\&                  unsigned long len);
\& void RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\s-1RIPEMD-160\s0 is a cryptographic hash function with a
160 bit output.
.PP
\&\fIRIPEMD160()\fR computes the \s-1RIPEMD-160\s0 message digest of the \fBn\fR
bytes at \fBd\fR and places it in \fBmd\fR (which must have space for
\&\s-1RIPEMD160_DIGEST_LENGTH\s0 == 20 bytes of output). If \fBmd\fR is \s-1NULL\s0, the digest
is placed in a static array.
.PP
The following functions may be used if the message is not completely
stored in memory:
.PP
\&\fIRIPEMD160_Init()\fR initializes a \fB\s-1RIPEMD160_CTX\s0\fR structure.
.PP
\&\fIRIPEMD160_Update()\fR can be called repeatedly with chunks of the message to
be hashed (\fBlen\fR bytes at \fBdata\fR).
.PP
\&\fIRIPEMD160_Final()\fR places the message digest in \fBmd\fR, which must have
space for \s-1RIPEMD160_DIGEST_LENGTH\s0 == 20 bytes of output, and erases
the \fB\s-1RIPEMD160_CTX\s0\fR.
.PP
Applications should use the higher level functions
EVP_DigestInit(3) etc. instead of calling the
hash functions directly.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIRIPEMD160()\fR returns a pointer to the hash value. 
.PP
\&\fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and \fIRIPEMD160_Final()\fR do not
return values.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1ISO/IEC\s0 10118\-3 (draft) (??)
.SH "SEE ALSO"
.IX Header "SEE ALSO"
openssl_sha(3), openssl_hmac(3), EVP_DigestInit(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fIRIPEMD160()\fR, \fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and
\&\fIRIPEMD160_Final()\fR are available since SSLeay 0.9.0.