csu3_am335x/EVSE/GPL/openssl-1.0.2g/release/ssl/man/man3/ripemd.3

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.\" ========================================================================
.\"
.IX Title "ripemd 3"
.TH ripemd 3 "2019-09-12" "1.0.2g" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
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.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"
\&\s-1RIPEMD\-160\s0 is a cryptographic hash function with a
160 bit output.
.PP
\&\s-1\fIRIPEMD160\s0()\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
\&\fIEVP_DigestInit\fR\|(3) etc. instead of calling the
hash functions directly.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\s-1\fIRIPEMD160\s0()\fR returns a pointer to the hash value.
.PP
\&\fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and \fIRIPEMD160_Final()\fR return 1 for
success, 0 otherwise.
.SH "CONFORMING TO"
.IX Header "CONFORMING TO"
\&\s-1ISO/IEC 10118\-3\s0 (draft) (??)
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIsha\fR\|(3), \fIhmac\fR\|(3), \fIEVP_DigestInit\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\s-1\fIRIPEMD160\s0()\fR, \fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and
\&\fIRIPEMD160_Final()\fR are available since SSLeay 0.9.0.