// -*- 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 <ijackson@nyx.cs.du.edu>.
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 /*{{{*/
#endif
#include <apt-pkg/md5.h>
+#include <apt-pkg/strutl.h>
+
#include <string.h>
#include <system.h>
#include <unistd.h>
// 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
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 */
// ---------------------------------------------------------------------
/* 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 /*{{{*/
/*}}}*/
// 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;
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)
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)
{
projects / apt.git / blobdiff