Automatically generated by Pod::Man 2.27 (Pod::Simple 3.28)

Standard preamble:
========================================================================
..

..

.. Set up some character translations and predefined strings. \*(-- will
give an unbreakable dash, \*(PI will give pi, \*(L" will give a left
double quote, and \*(R" will give a right double quote. \*(C+ will
give a nicer C++. Capital omega is used to do unbreakable dashes and
therefore won't be available. \*(C` and \*(C' expand to `' in nroff,
nothing in troff, for use with C<>.
.tr \(*W- . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\}
Escape single quotes in literal strings from groff's Unicode transform.

If the F register is turned on, we'll generate index entries on stderr for
titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index
entries marked with X<> in POD. Of course, you'll have to process the
output yourself in some meaningful fashion.

Avoid warning from groff about undefined register 'F'.
.. .nr rF 0 . if \nF \{ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{ . nr % 0 . nr F 2 . \} . \} .\} .rr rF
Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2).
Fear. Run. Save yourself. No user-serviceable parts.
. \" fudge factors for nroff and troff . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] .\} . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents . \" corrections for vroff . \" for low resolution devices (crt and lpr) \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} ========================================================================

Title "mdc2 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
MDC2, MDC2_Init, MDC2_Update, MDC2_Final - MDC2 hash function Header "SYNOPSIS" .Vb 1 #include <openssl/mdc2.h> \& unsigned char *MDC2(const unsigned char *d, unsigned long n, unsigned char *md); \& int MDC2_Init(MDC2_CTX *c); int MDC2_Update(MDC2_CTX *c, const unsigned char *data, unsigned long len); int MDC2_Final(unsigned char *md, MDC2_CTX *c); .Ve Header "DESCRIPTION" \s-1MDC2\s0 is a method to construct hash functions with 128 bit output from block ciphers. These functions are an implementation of \s-1MDC2\s0 with \s-1DES.\s0

\s-1MDC2\s0() computes the \s-1MDC2\s0 message digest of the n bytes at d and places it in md (which must have space for \s-1MDC2_DIGEST_LENGTH\s0 == 16 bytes of output). If md is \s-1NULL,\s0 the digest is placed in a static array.

The following functions may be used if the message is not completely stored in memory:

\fIMDC2_Init() initializes a \s-1MDC2_CTX\s0 structure.

\fIMDC2_Update() can be called repeatedly with chunks of the message to be hashed (len bytes at data).

\fIMDC2_Final() places the message digest in md, which must have space for \s-1MDC2_DIGEST_LENGTH\s0 == 16 bytes of output, and erases the \s-1MDC2_CTX\s0.

Applications should use the higher level functions \fIEVP_DigestInit\|(3) etc. instead of calling the hash functions directly.

Header "RETURN VALUES" \s-1MDC2\s0() returns a pointer to the hash value.

\fIMDC2_Init(), MDC2_Update() and MDC2_Final() return 1 for success, 0 otherwise.

Header "CONFORMING TO" \s-1ISO/IEC 10118-2,\s0 with \s-1DES\s0 Header "SEE ALSO" \fIsha\|(3), EVP_DigestInit\|(3) Header "HISTORY" \s-1MDC2\s0(), MDC2_Init(), MDC2_Update() and MDC2_Final() are available since SSLeay 0.8.