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.\" ========================================================================
.\"
.IX Title "ripemd 3"
.TH ripemd 3 2019-12-20 1.0.2u OpenSSL
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
RIPEMD160, RIPEMD160_Init, RIPEMD160_Update, RIPEMD160_Final \-
RIPEMD\-160 hash function
.SH SYNOPSIS
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH DESCRIPTION
.IX Header "DESCRIPTION"
RIPEMD\-160 is a cryptographic hash function with a
160 bit output.
.PP
\&\fBRIPEMD160()\fR computes the RIPEMD\-160 message digest of the \fBn\fR
bytes at \fBd\fR and places it in \fBmd\fR (which must have space for
RIPEMD160_DIGEST_LENGTH == 20 bytes of output). If \fBmd\fR is NULL, 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
\&\fBRIPEMD160_Init()\fR initializes a \fBRIPEMD160_CTX\fR structure.
.PP
\&\fBRIPEMD160_Update()\fR can be called repeatedly with chunks of the message to
be hashed (\fBlen\fR bytes at \fBdata\fR).
.PP
\&\fBRIPEMD160_Final()\fR places the message digest in \fBmd\fR, which must have
space for RIPEMD160_DIGEST_LENGTH == 20 bytes of output, and erases
the \fBRIPEMD160_CTX\fR.
.PP
Applications should use the higher level functions
\&\fBEVP_DigestInit\fR\|(3) etc. instead of calling the
hash functions directly.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fBRIPEMD160()\fR returns a pointer to the hash value.
.PP
\&\fBRIPEMD160_Init()\fR, \fBRIPEMD160_Update()\fR and \fBRIPEMD160_Final()\fR return 1 for
success, 0 otherwise.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
ISO/IEC 10118\-3 (draft) (??)
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBsha\fR\|(3), \fBhmac\fR\|(3), \fBEVP_DigestInit\fR\|(3)
.SH HISTORY
.IX Header "HISTORY"
\&\fBRIPEMD160()\fR, \fBRIPEMD160_Init()\fR, \fBRIPEMD160_Update()\fR and
\&\fBRIPEMD160_Final()\fR are available since SSLeay 0.9.0.