From 6e52073fac7be205251b222f63cf2f61d1519364 Mon Sep 17 00:00:00 2001 From: Arch Librarian Date: Mon, 20 Sep 2004 16:54:27 +0000 Subject: A few functions migrated around Author: jgg Date: 1999-08-02 03:07:47 GMT A few functions migrated around --- apt-pkg/contrib/md5.cc | 79 ++++++++++++++------------------------------------ 1 file changed, 21 insertions(+), 58 deletions(-) (limited to 'apt-pkg/contrib/md5.cc') diff --git a/apt-pkg/contrib/md5.cc b/apt-pkg/contrib/md5.cc index 671d61d06..0d0a59696 100644 --- a/apt-pkg/contrib/md5.cc +++ b/apt-pkg/contrib/md5.cc @@ -1,25 +1,23 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: md5.cc,v 1.2 1998/11/01 05:27:36 jgg Exp $ +// $Id: md5.cc,v 1.3 1999/08/02 03:07:47 jgg Exp $ /* ###################################################################### MD5Sum - MD5 Message Digest Algorithm. - This code implements the MD5 message-digest algorithm. - The algorithm is due to Ron Rivest. This code was - written by Colin Plumb in 1993, no copyright is claimed. - This code is in the public domain; do with it what you wish. - - Equivalent code is available from RSA Data Security, Inc. - This code has been tested against that, and is equivalent, - except that you don't need to include two pages of legalese - with every copy. - - To compute the message digest of a chunk of bytes, declare an - MD5Context structure, pass it to MD5Init, call MD5Update as - needed on buffers full of bytes, and then call MD5Final, which - will fill a supplied 16-byte array with the digest. + This code implements the MD5 message-digest algorithm. The algorithm is + due to Ron Rivest. This code was written by Colin Plumb in 1993, no + copyright is claimed. This code is in the public domain; do with it what + you wish. + Equivalent code is available from RSA Data Security, Inc. This code has + been tested against that, and is equivalent, except that you don't need to + include two pages of legalese with every copy. + + To compute the message digest of a chunk of bytes, instantiate the class, + and repeatedly call one of the Add() members. When finished the Result + method will return the Hash and finalize the value. + Changed so as no longer to depend on Colin Plumb's `usual.h' header definitions; now uses stuff from dpkg's config.h. - Ian Jackson . @@ -33,9 +31,6 @@ arrays to UINT32's and go from there. This allows us to advoid using config.h in a public header or internally newing memory. - Some of the terms may be quite bogus, I don't really know the details of - MD5, just converted the code ;> - JGG - ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ @@ -44,6 +39,8 @@ #endif #include +#include + #include #include #include @@ -72,7 +69,7 @@ static void byteSwap(UINT32 *buf, unsigned words) // MD5Transform - Alters an existing MD5 hash /*{{{*/ // --------------------------------------------------------------------- /* The core of the MD5 algorithm, this alters an existing MD5 hash to - reflect the addition of 16 longwords of new data. MD5Update blocks + reflect the addition of 16 longwords of new data. Add blocks the data and converts bytes into longwords for this routine. */ // The four core functions - F1 is optimized somewhat @@ -169,22 +166,6 @@ static void MD5Transform(UINT32 buf[4], UINT32 const in[16]) buf[3] += d; } /*}}}*/ -// hex_digit - Convert a hex character into an integer /*{{{*/ -// --------------------------------------------------------------------- -/* The original version of this could only handle lower case. These routines - do output to lowercase hex but can handle upper okay as well.*/ -static int hex_digit(int c) -{ - - if (c >= '0' && c <= '9') - return c - '0'; - if (c >= 'a' && c <= 'f') - return c - 'a' + 10; - if (c >= 'A' && c <= 'F') - return c - 'A' + 10; - return 0; -} - /*}}}*/ // MD5SumValue::MD5SumValue - Constructs the summation from a string /*{{{*/ // --------------------------------------------------------------------- /* The string form of a MD5 is a 32 character hex number */ @@ -206,26 +187,8 @@ MD5SumValue::MD5SumValue() // --------------------------------------------------------------------- /* Converts the hex string into a set of chars */ bool MD5SumValue::Set(string Str) -{ - // Check for correct length - if (Str.length() != 32) - return false; - - // Check for only hex digits - const char *I = Str.begin(); - for (;I != Str.end(); I++) - if (isxdigit(*I) == 0) - return false; - - // Convert each digit. We store it in the same order as the string - int J = 0; - for (I = Str.begin(); I != Str.end();J++, I += 2) - { - Sum[J] = hex_digit(I[0]) << 4; - Sum[J] += hex_digit(I[1]); - } - - return true; +{ + return Hex2Num(Str.begin(),Str.end(),Sum,sizeof(Sum)); } /*}}}*/ // MD5SumValue::Value - Convert the number into a string /*{{{*/ @@ -252,7 +215,7 @@ string MD5SumValue::Value() const /*}}}*/ // MD5SumValue::operator == - Comparitor /*{{{*/ // --------------------------------------------------------------------- -/* Call memcmp on the buffer */ +/* Call memcmp on the buffer */ bool MD5SumValue::operator ==(const MD5SumValue &rhs) const { return memcmp(Sum,rhs.Sum,sizeof(Sum)) == 0; @@ -276,7 +239,7 @@ MD5Summation::MD5Summation() Done = false; } /*}}}*/ -// MD5Summation::Add - 'Add' a data set to the sum /*{{{*/ +// MD5Summation::Add - 'Add' a data set to the hash /*{{{*/ // --------------------------------------------------------------------- /* */ bool MD5Summation::Add(const unsigned char *data,unsigned long len) @@ -293,7 +256,7 @@ bool MD5Summation::Add(const unsigned char *data,unsigned long len) if ((bytes[0] = t + len) < t) bytes[1]++; - // Space available in ctx->in (at least 1) + // Space available (at least 1) t = 64 - (t & 0x3f); if (t > len) { -- cgit v1.2.3