Merge branch 'vendor/OPENSSL'
[dragonfly.git] / secure / lib / libcrypto / man / ripemd.3
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132.\" ========================================================================
133.\"
134.IX Title "ripemd 3"
fc468453 135.TH ripemd 3 "2010-02-27" "0.9.8m" "OpenSSL"
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136.\" For nroff, turn off justification. Always turn off hyphenation; it makes
137.\" way too many mistakes in technical documents.
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139.nh
984263bc 140.SH "NAME"
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141RIPEMD160, RIPEMD160_Init, RIPEMD160_Update, RIPEMD160_Final \-
142RIPEMD\-160 hash function
984263bc 143.SH "SYNOPSIS"
8b0cefbb 144.IX Header "SYNOPSIS"
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145.Vb 1
146\& #include <openssl/ripemd.h>
e257b235 147\&
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148\& unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
149\& unsigned char *md);
e257b235 150\&
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151\& int RIPEMD160_Init(RIPEMD160_CTX *c);
152\& int RIPEMD160_Update(RIPEMD_CTX *c, const void *data,
984263bc 153\& unsigned long len);
edae4a78 154\& int RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);
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155.Ve
156.SH "DESCRIPTION"
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157.IX Header "DESCRIPTION"
158\&\s-1RIPEMD\-160\s0 is a cryptographic hash function with a
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159160 bit output.
160.PP
8b0cefbb 161\&\s-1\fIRIPEMD160\s0()\fR computes the \s-1RIPEMD\-160\s0 message digest of the \fBn\fR
984263bc 162bytes at \fBd\fR and places it in \fBmd\fR (which must have space for
8b0cefbb 163\&\s-1RIPEMD160_DIGEST_LENGTH\s0 == 20 bytes of output). If \fBmd\fR is \s-1NULL\s0, the digest
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164is placed in a static array.
165.PP
166The following functions may be used if the message is not completely
167stored in memory:
168.PP
8b0cefbb 169\&\fIRIPEMD160_Init()\fR initializes a \fB\s-1RIPEMD160_CTX\s0\fR structure.
984263bc 170.PP
8b0cefbb 171\&\fIRIPEMD160_Update()\fR can be called repeatedly with chunks of the message to
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172be hashed (\fBlen\fR bytes at \fBdata\fR).
173.PP
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174\&\fIRIPEMD160_Final()\fR places the message digest in \fBmd\fR, which must have
175space for \s-1RIPEMD160_DIGEST_LENGTH\s0 == 20 bytes of output, and erases
176the \fB\s-1RIPEMD160_CTX\s0\fR.
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177.PP
178Applications should use the higher level functions
8b0cefbb 179\&\fIEVP_DigestInit\fR\|(3) etc. instead of calling the
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180hash functions directly.
181.SH "RETURN VALUES"
8b0cefbb 182.IX Header "RETURN VALUES"
e257b235 183\&\s-1\fIRIPEMD160\s0()\fR returns a pointer to the hash value.
984263bc 184.PP
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185\&\fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and \fIRIPEMD160_Final()\fR return 1 for
186success, 0 otherwise.
984263bc 187.SH "CONFORMING TO"
74dab6c2 188.IX Header "CONFORMING TO"
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189\&\s-1ISO/IEC\s0 10118\-3 (draft) (??)
190.SH "SEE ALSO"
74dab6c2 191.IX Header "SEE ALSO"
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192\&\fIsha\fR\|(3), \fIhmac\fR\|(3), \fIEVP_DigestInit\fR\|(3)
193.SH "HISTORY"
984263bc 194.IX Header "HISTORY"
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195\&\s-1\fIRIPEMD160\s0()\fR, \fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and
196\&\fIRIPEMD160_Final()\fR are available since SSLeay 0.9.0.