f4401cd869
alter des.h to be friendly with openssl/des.h (you can include both in the same file) make libkrb to depend on libdes. bump major. massage various portioin of heimdal to be friendly with openssl 0.9.7b.
204 lines
5.8 KiB
Groff
204 lines
5.8 KiB
Groff
.\" $NetBSD: openssl_mdc2.3,v 1.8 2003/07/24 14:16:51 itojun Exp $
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.\"
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.\" Automatically generated by Pod::Man version 1.02
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.\" Thu Jul 24 13:08:07 2003
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.\" ======================================================================
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.\" ======================================================================
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.\"
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.IX Title "mdc2 3"
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.TH mdc2 3 "0.9.7b" "2000-02-26" "OpenSSL"
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.UC
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.SH "NAME"
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\&\s-1MDC2\s0, MDC2_Init, MDC2_Update, MDC2_Final \- \s-1MDC2\s0 hash function
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.SH "LIBRARY"
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libcrypto, -lcrypto
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.SH "SYNOPSIS"
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.IX Header "SYNOPSIS"
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.Vb 1
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\& #include <openssl/mdc2.h>
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.Ve
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.Vb 2
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\& unsigned char *MDC2(const unsigned char *d, unsigned long n,
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\& unsigned char *md);
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.Ve
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.Vb 4
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\& void MDC2_Init(MDC2_CTX *c);
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\& void MDC2_Update(MDC2_CTX *c, const unsigned char *data,
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\& unsigned long len);
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\& void MDC2_Final(unsigned char *md, MDC2_CTX *c);
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.Ve
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.SH "DESCRIPTION"
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.IX Header "DESCRIPTION"
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\&\s-1MDC2\s0 is a method to construct hash functions with 128 bit output from
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block ciphers. These functions are an implementation of \s-1MDC2\s0 with
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\&\s-1DES\s0.
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.PP
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\&\fIMDC2()\fR computes the \s-1MDC2\s0 message digest of the \fBn\fR
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bytes at \fBd\fR and places it in \fBmd\fR (which must have space for
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\&\s-1MDC2_DIGEST_LENGTH\s0 == 16 bytes of output). If \fBmd\fR is \s-1NULL\s0, the digest
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is placed in a static array.
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.PP
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The following functions may be used if the message is not completely
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stored in memory:
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.PP
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\&\fIMDC2_Init()\fR initializes a \fB\s-1MDC2_CTX\s0\fR structure.
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.PP
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\&\fIMDC2_Update()\fR can be called repeatedly with chunks of the message to
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be hashed (\fBlen\fR bytes at \fBdata\fR).
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.PP
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\&\fIMDC2_Final()\fR places the message digest in \fBmd\fR, which must have space
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for \s-1MDC2_DIGEST_LENGTH\s0 == 16 bytes of output, and erases the \fB\s-1MDC2_CTX\s0\fR.
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.PP
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Applications should use the higher level functions
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EVP_DigestInit(3) etc. instead of calling the
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hash functions directly.
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.SH "RETURN VALUES"
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.IX Header "RETURN VALUES"
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\&\fIMDC2()\fR returns a pointer to the hash value.
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.PP
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\&\fIMDC2_Init()\fR, \fIMDC2_Update()\fR and \fIMDC2_Final()\fR do not return values.
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.SH "CONFORMING TO"
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.IX Header "CONFORMING TO"
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\&\s-1ISO/IEC\s0 10118\-2, with \s-1DES\s0
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.SH "SEE ALSO"
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.IX Header "SEE ALSO"
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openssl_sha(3), EVP_DigestInit(3)
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.SH "HISTORY"
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.IX Header "HISTORY"
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\&\fIMDC2()\fR, \fIMDC2_Init()\fR, \fIMDC2_Update()\fR and \fIMDC2_Final()\fR are available since
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SSLeay 0.8.
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