Switch from OpenSSL 0.9.7a to OpenSSL 0.9.7d.
[dragonfly.git] / secure / lib / libcrypto / man / ripemd.3
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138.\" ======================================================================
139.\"
140.IX Title "ripemd 3"
141.TH ripemd 3 "0.9.7a" "2003-02-19" "OpenSSL"
142.UC
143.SH "NAME"
144\&\s-1RIPEMD160\s0, RIPEMD160_Init, RIPEMD160_Update, RIPEMD160_Final \-
145\&\s-1RIPEMD-160\s0 hash function
146.SH "SYNOPSIS"
147.IX Header "SYNOPSIS"
148.Vb 1
149\& #include <openssl/ripemd.h>
150.Ve
151.Vb 2
152\& unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
153\& unsigned char *md);
154.Ve
155.Vb 4
156\& void RIPEMD160_Init(RIPEMD160_CTX *c);
157\& void RIPEMD160_Update(RIPEMD_CTX *c, const void *data,
158\& unsigned long len);
159\& void RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);
160.Ve
161.SH "DESCRIPTION"
162.IX Header "DESCRIPTION"
163\&\s-1RIPEMD-160\s0 is a cryptographic hash function with a
164160 bit output.
165.PP
166\&\fIRIPEMD160()\fR computes the \s-1RIPEMD-160\s0 message digest of the \fBn\fR
167bytes at \fBd\fR and places it in \fBmd\fR (which must have space for
168\&\s-1RIPEMD160_DIGEST_LENGTH\s0 == 20 bytes of output). If \fBmd\fR is \s-1NULL\s0, the digest
169is placed in a static array.
170.PP
171The following functions may be used if the message is not completely
172stored in memory:
173.PP
174\&\fIRIPEMD160_Init()\fR initializes a \fB\s-1RIPEMD160_CTX\s0\fR structure.
175.PP
176\&\fIRIPEMD160_Update()\fR can be called repeatedly with chunks of the message to
177be hashed (\fBlen\fR bytes at \fBdata\fR).
178.PP
179\&\fIRIPEMD160_Final()\fR places the message digest in \fBmd\fR, which must have
180space for \s-1RIPEMD160_DIGEST_LENGTH\s0 == 20 bytes of output, and erases
181the \fB\s-1RIPEMD160_CTX\s0\fR.
182.PP
183Applications should use the higher level functions
184EVP_DigestInit(3) etc. instead of calling the
185hash functions directly.
186.SH "RETURN VALUES"
187.IX Header "RETURN VALUES"
188\&\fIRIPEMD160()\fR returns a pointer to the hash value.
189.PP
190\&\fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and \fIRIPEMD160_Final()\fR do not
191return values.
192.SH "CONFORMING TO"
193.IX Header "CONFORMING TO"
194\&\s-1ISO/IEC\s0 10118\-3 (draft) (??)
195.SH "SEE ALSO"
196.IX Header "SEE ALSO"
197sha(3), hmac(3), EVP_DigestInit(3)
198.SH "HISTORY"
199.IX Header "HISTORY"
200\&\fIRIPEMD160()\fR, \fIRIPEMD160_Init()\fR, \fIRIPEMD160_Update()\fR and
201\&\fIRIPEMD160_Final()\fR are available since SSLeay 0.9.0.