>
> I noted in my email of 14 August that I had a file with a bacula md5
> that I was not able to match using the (Linux, Debian stable) md5 cli
> utility.
>
> I would be grateful to learn if anyone has replicated the method of
> calculating an md5 hash using python. If so I'd be grateful to know
how
> it is done.
>
>From memory, the MD5 is 'correct', but the base64 translation is a bit
funny. Here's a C# version I wrote quite a while back, if it's any help.
It's the baculaBase64 routine that's probably the most useful:
public static string toBase64(UInt64 val)
{
int digits = 0;
UInt64 tmp = val;
do
{
tmp >>= 6;
digits++;
} while (tmp != 0);
string s = "";
tmp = val;
do
{
s = base64lookup[tmp & 0x3F] + s;
tmp >>= 6;
} while (tmp != 0);
return s;
}
public static string toBase64(Int64 val)
{
int digits = 0;
Int64 tmp = val;
do
{
tmp >>= 6;
digits++;
} while (tmp != 0);
string s = "";
tmp = val;
do
{
s = base64lookup[tmp & 0x3F] + s;
tmp >>= 6;
} while (tmp != 0);
return s;
}
public static string toBase64(byte[] bytes)
{
return baculaBase64(bytes);
}
private static char[] base64lookup = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M',
'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
'W', 'X', 'Y', 'Z',
'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i',
'j', 'k', 'l', 'm',
'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'+', '/'
};
public static string baculaBase64(byte[] bytes)
{
UInt32 bits;
int count;
string result = "";
for (count = 1; count < bytes.Length; count++)
{
if ((bytes[count] & 0x80) == 0x80)
{
switch (count % 3)
{
case 1:
bytes[count - 1] |= 0x03;
break;
case 2:
bytes[count - 1] |= 0x0F;
break;
}
}
}
count = 0;
while (count < bytes.Length)
{
int endflag = 0;
bits = bytes[count++];
if (count < bytes.Length)
{
bits = (bits << 8) | bytes[count++];
}
else
{
bits <<= 8;
endflag++;
}
if (count < bytes.Length)
{
bits = (bits << 8) | bytes[count++];
}
else
{
bits <<= 8;
endflag++;
}
for (int bytelet = 3; bytelet >= 0; bytelet--)
{
uint val = (bits >> (bytelet * 6)) & 0x3F;
if (val != 0 || bytelet >= endflag)
{
if (endflag == 2 && bytelet == 2)
val >>= 4;
result += base64lookup[val];
}
}
}
return result;
}
public static string properBase64(byte[] bytes)
{
UInt32 bits;
int count;
string result = "";
count = 0;
while (count < bytes.Length)
{
int endflag = 0;
bits = bytes[count++];
if (count < bytes.Length)
bits = (bits << 8) | bytes[count++];
else
{
bits <<= 8;
endflag++;
}
if (count < bytes.Length)
bits = (bits << 8) | bytes[count++];
else
{
bits <<= 8;
endflag++;
}
for (int bytelet = 3; bytelet >= 0; bytelet--)
{
uint val = (bits >> (bytelet * 6)) & 0x3F;
if (val == 0 && bytelet < endflag)
result += "=";
else
result += base64lookup[val];
}
}
return result;
}
James
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