* sorry I got caught up with other work and haven't been back here.
Basically, there were alot of things I needed to make work with this shopping cart. I needed to make a formmail send an email to the owner of the site as soon as something was ordered, and I needed to make it work with the AuthorizeNet. Alot of this stuff is probably hideously sloppy (mostly I just messed with AuthorizeNet's example PERL until I made it work), but it works, so what the heck, right?
Anyway, here's the script with the cart itself, a combined manage cart & checkout page:
Below is the source code from everything in the CGI-BIN, 'cept the formmail script, which is just a simple script from Matt's Script Archive (and again, was only necessary cause this particular customer wanted an email every time someone purchased something. I'm only including mention of it because it explains why I did some things certain ways).
Again, the PERL scripts are mostly just the example files from AuthorizeNet itself, so most of the stuff in there, including the comment lines, are word for word their example stuff. All I did was mess with some of them a bit to make them work.
package SimHMAC;
use strict;
require 5.000;
# $Id: SimHMAC.pm,v 1.1 2002/10/22 21:03:59 adama Exp $
require Exporter;
@SimHMAC::ISA = qw( Exporter );
@SimHMAC::EXPORT = qw( &hmac &hmac_hex );
use integer;
#
# interface routine; returns a digest of a string passed as a parameter
#
sub Digest {
my $context = &MD5Init();
# this should be done always
&MD5Update($context, $_[0], length($_[0]));
return &MD5Final($context);
}
#
# same as Digest but returns digest in a printable (hex) form
#
sub HexDigest {
return unpack("H*", &Digest(@_));
}
#
# MD5 implementation is below
#
# derived from the RSA Data Security, Inc. MD5 Message-Digest Algorithm
# Original context structure
# typedef struct {
#
# UINT4 state[4]; /* state (ABCD) */
# UINT4 count[2]; /* number of bits, modulo 2^64 (lsb first) */
# unsigned char buffer[64]; /* input buffer */
#
# } MD5_CTX;
# Constants for MD5Transform routine.
sub S11 { 7 }
sub S12 { 12 }
sub S13 { 17 }
sub S14 { 22 }
sub S21 { 5 }
sub S22 { 9 }
sub S23 { 14 }
sub S24 { 20 }
sub S31 { 4 }
sub S32 { 11 }
sub S33 { 16 }
sub S34 { 23 }
sub S41 { 6 }
sub S42 { 10 }
sub S43 { 15 }
sub S44 { 21 }
my $PADDING = join('', map(chr, (
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0))
);
# F, G, H and I are basic MD5 functions.
sub F { my ($x, $y, $z) = @_; ((($x) & ($y)) | ((~$x) & ($z))); }
sub G { my ($x, $y, $z) = @_; ((($x) & ($z)) | (($y) & (~$z))); }
sub H { my ($x, $y, $z) = @_; (($x) ^ ($y) ^ ($z)); }
sub I { my ($x, $y, $z) = @_; (($y) ^ (($x) | (~$z))); }
# ROTATE_LEFT rotates x left n bits.
# Note: "& ~(-1 << $n)" is not in C version
#
sub ROTATE_LEFT { my ($x, $n) = @_; ($x << $n) | (($x >> (32-$n) & ~(-1 << $n))); }
# FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4.
# Rotation is separate from addition to prevent recomputation.
sub FF {
my ($a, $b, $c, $d, $x, $s, $ac) = @_;
$a += &F($b, $c, $d) + $x + $ac;
$a = &ROTATE_LEFT($a, $s);
$a += $b;
return $a;
}
sub GG {
my ($a, $b, $c, $d, $x, $s, $ac) = @_;
$a += &G ($b, $c, $d) + $x + $ac;
$a = &ROTATE_LEFT ($a, $s);
$a += $b;
return $a;
}
sub HH {
my ($a, $b, $c, $d, $x, $s, $ac) = @_;
$a += &H ($b, $c, $d) + $x + $ac;
$a = &ROTATE_LEFT ($a, $s);
$a += $b;
return $a;
}
sub II {
my ($a, $b, $c, $d, $x, $s, $ac) = @_;
$a += &I ($b, $c, $d) + $x + $ac;
$a = &ROTATE_LEFT ($a, $s);
$a += $b;
return $a;
}
# MD5 initialization. Begins an MD5 operation, writing a new context.
sub MD5Init {
my $context = {};
@{$context-> {count}} = 2;
$context-> {count}[0] = $context-> {count}[1] = 0;
$context-> {buffer} = '';
# Load magic initialization constants.
@{$context-> {state}} = 4;
$context-> {state}[0] = 0x67452301;
$context-> {state}[1] = 0xefcdab89;
$context-> {state}[2] = 0x98badcfe;
$context-> {state}[3] = 0x10325476;
return $context;
}
# MD5 block update operation. Continues an MD5 message-digest
# operation, processing another message block, and updating the context.
sub MD5Update {
my ($context, $input, $inputLen) = @_;
# Compute number of bytes mod 64
my $index = (($context->{count}[0] >> 3) & 0x3F);
# Update number of bits
if (($context->{count}[0] += ($inputLen << 3)) <
($inputLen << 3))
{
$context->{count}[1]++;
$context->{count}[1] += ($inputLen >> 29);
}
my $partLen = 64 - $index;
# Transform as many times as possible.
my $i;
if ($inputLen >= $partLen) {
substr($context -> {buffer}, $index, $partLen) = substr($input, 0, $partLen);
&MD5Transform(\@{$context -> {state}}, $context -> {buffer});
for ($i = $partLen; $i + 63 < $inputLen; $i += 64) {
&MD5Transform ($context-> {state}, substr($input,$i));
}
$index = 0;
} else {
$i = 0;
}
# Buffer remaining input
substr($context->{buffer}, $index, $inputLen-$i) = substr($input, $i, $inputLen-$i);
}
# MD5 finalization. Ends an MD5 message-digest operation, writing the
# the message digest and zeroizing the context.
sub MD5Final {
my $context = shift;
# Save number of bits
my $bits = &Encode (\@{$context->{count}}, 8);
# Pad out to 56 mod 64.
my ($index, $padLen);
$index = ($context->{count}[0] >> 3) & 0x3f;
$padLen = ($index < 56) ? (56 - $index) : (120 - $index);
&MD5Update ($context, $PADDING, $padLen);
# Append length (before padding)
MD5Update ($context, $bits, 8);
# Store state in digest
my $digest = &Encode(\@{$context-> {state}}, 16);
# &MD5_memset ($context, 0);
return $digest;
}
# MD5 basic transformation. Transforms state based on block.
sub MD5Transform {
my ($state, $block) = @_;
my ($a,$b,$c,$d) = @{$state};
my @x = 16;
&Decode (\@x, $block, 64);
# Round 1
$a = &FF ($a, $b, $c, $d, $x[ 0], S11, 0xd76aa478); # 1
$d = &FF ($d, $a, $b, $c, $x[ 1], S12, 0xe8c7b756); # 2
$c = &FF ($c, $d, $a, $b, $x[ 2], S13, 0x242070db); # 3
$b = &FF ($b, $c, $d, $a, $x[ 3], S14, 0xc1bdceee); # 4
$a = &FF ($a, $b, $c, $d, $x[ 4], S11, 0xf57c0faf); # 5
$d = &FF ($d, $a, $b, $c, $x[ 5], S12, 0x4787c62a); # 6
$c = &FF ($c, $d, $a, $b, $x[ 6], S13, 0xa8304613); # 7
$b = &FF ($b, $c, $d, $a, $x[ 7], S14, 0xfd469501); # 8
$a = &FF ($a, $b, $c, $d, $x[ 8], S11, 0x698098d8); # 9
$d = &FF ($d, $a, $b, $c, $x[ 9], S12, 0x8b44f7af); # 10
$c = &FF ($c, $d, $a, $b, $x[10], S13, 0xffff5bb1); # 11
$b = &FF ($b, $c, $d, $a, $x[11], S14, 0x895cd7be); # 12
$a = &FF ($a, $b, $c, $d, $x[12], S11, 0x6b901122); # 13
$d = &FF ($d, $a, $b, $c, $x[13], S12, 0xfd987193); # 14
$c = &FF ($c, $d, $a, $b, $x[14], S13, 0xa679438e); # 15
$b = &FF ($b, $c, $d, $a, $x[15], S14, 0x49b40821); # 16
# Round 2
$a = &GG ($a, $b, $c, $d, $x[ 1], S21, 0xf61e2562); # 17
$d = &GG ($d, $a, $b, $c, $x[ 6], S22, 0xc040b340); # 18
$c = &GG ($c, $d, $a, $b, $x[11], S23, 0x265e5a51); # 19
$b = &GG ($b, $c, $d, $a, $x[ 0], S24, 0xe9b6c7aa); # 20
$a = &GG ($a, $b, $c, $d, $x[ 5], S21, 0xd62f105d); # 21
$d = &GG ($d, $a, $b, $c, $x[10], S22, 0x2441453); # 22
$c = &GG ($c, $d, $a, $b, $x[15], S23, 0xd8a1e681); # 23
$b = &GG ($b, $c, $d, $a, $x[ 4], S24, 0xe7d3fbc8); # 24
$a = &GG ($a, $b, $c, $d, $x[ 9], S21, 0x21e1cde6); # 25
$d = &GG ($d, $a, $b, $c, $x[14], S22, 0xc33707d6); # 26
$c = &GG ($c, $d, $a, $b, $x[ 3], S23, 0xf4d50d87); # 27
$b = &GG ($b, $c, $d, $a, $x[ 8], S24, 0x455a14ed); # 28
$a = &GG ($a, $b, $c, $d, $x[13], S21, 0xa9e3e905); # 29
$d = &GG ($d, $a, $b, $c, $x[ 2], S22, 0xfcefa3f8); # 30
$c = &GG ($c, $d, $a, $b, $x[ 7], S23, 0x676f02d9); # 31
$b = &GG ($b, $c, $d, $a, $x[12], S24, 0x8d2a4c8a); # 32
# Round 3
$a = &HH ($a, $b, $c, $d, $x[ 5], S31, 0xfffa3942); # 33
$d = &HH ($d, $a, $b, $c, $x[ 8], S32, 0x8771f681); # 34
$c = &HH ($c, $d, $a, $b, $x[11], S33, 0x6d9d6122); # 35
$b = &HH ($b, $c, $d, $a, $x[14], S34, 0xfde5380c); # 36
$a = &HH ($a, $b, $c, $d, $x[ 1], S31, 0xa4beea44); # 37
$d = &HH ($d, $a, $b, $c, $x[ 4], S32, 0x4bdecfa9); # 38
$c = &HH ($c, $d, $a, $b, $x[ 7], S33, 0xf6bb4b60); # 39
$b = &HH ($b, $c, $d, $a, $x[10], S34, 0xbebfbc70); # 40
$a = &HH ($a, $b, $c, $d, $x[13], S31, 0x289b7ec6); # 41
$d = &HH ($d, $a, $b, $c, $x[ 0], S32, 0xeaa127fa); # 42
$c = &HH ($c, $d, $a, $b, $x[ 3], S33, 0xd4ef3085); # 43
$b = &HH ($b, $c, $d, $a, $x[ 6], S34, 0x4881d05); # 44
$a = &HH ($a, $b, $c, $d, $x[ 9], S31, 0xd9d4d039); # 45
$d = &HH ($d, $a, $b, $c, $x[12], S32, 0xe6db99e5); # 46
$c = &HH ($c, $d, $a, $b, $x[15], S33, 0x1fa27cf8); # 47
$b = &HH ($b, $c, $d, $a, $x[ 2], S34, 0xc4ac5665); # 48
# Round 4
$a = &II ($a, $b, $c, $d, $x[ 0], S41, 0xf4292244); # 49
$d = &II ($d, $a, $b, $c, $x[ 7], S42, 0x432aff97); # 50
$c = &II ($c, $d, $a, $b, $x[14], S43, 0xab9423a7); # 51
$b = &II ($b, $c, $d, $a, $x[ 5], S44, 0xfc93a039); # 52
$a = &II ($a, $b, $c, $d, $x[12], S41, 0x655b59c3); # 53
$d = &II ($d, $a, $b, $c, $x[ 3], S42, 0x8f0ccc92); # 54
$c = &II ($c, $d, $a, $b, $x[10], S43, 0xffeff47d); # 55
$b = &II ($b, $c, $d, $a, $x[ 1], S44, 0x85845dd1); # 56
$a = &II ($a, $b, $c, $d, $x[ 8], S41, 0x6fa87e4f); # 57
$d = &II ($d, $a, $b, $c, $x[15], S42, 0xfe2ce6e0); # 58
$c = &II ($c, $d, $a, $b, $x[ 6], S43, 0xa3014314); # 59
$b = &II ($b, $c, $d, $a, $x[13], S44, 0x4e0811a1); # 60
$a = &II ($a, $b, $c, $d, $x[ 4], S41, 0xf7537e82); # 61
$d = &II ($d, $a, $b, $c, $x[11], S42, 0xbd3af235); # 62
$c = &II ($c, $d, $a, $b, $x[ 2], S43, 0x2ad7d2bb); # 63
$b = &II ($b, $c, $d, $a, $x[ 9], S44, 0xeb86d391); # 64
$state -> [0] += $a;
$state -> [1] += $b;
$state -> [2] += $c;
$state -> [3] += $d;
# Zeroize sensitive information.
# MD5_memset ((POINTER)x, 0, sizeof (x));
}
# Encodes input (UINT4) into output (unsigned char). Assumes len is
# a multiple of 4.
sub Encode {
my ($input, $len) = @_;
my $output = '';
my ($i, $j);
for ($i = 0, $j = 0; $j < $len; $i++, $j += 4) {
substr($output, $j+0, 1) = chr($input -> [$i] & 0xff);
substr($output, $j+1, 1) = chr(($input -> [$i] >> 8) & 0xff);
substr($output, $j+2, 1) = chr(($input -> [$i] >> 16) & 0xff);
substr($output, $j+3, 1) = chr(($input -> [$i] >> 24) & 0xff);
}
return $output;
}
# Decodes input (unsigned char) into output (UINT4). Assumes len is
# a multiple of 4.
sub Decode {
my ($output, $input, $len) = @_;
my ($i, $j);
for ($i = 0, $j = 0; $j < $len; $i++, $j += 4) {
$output -> [$i] =
(ord(substr($input, $j+0, 1))) |
(ord(substr($input, $j+1, 1)) << 8) |
(ord(substr($input, $j+2, 1)) << 16) |
(ord(substr($input, $j+3, 1)) << 24);
}
}
sub hmac
{
my($data, $key) = @_;
my $block_size = 64;
$key = &Digest($key) if length($key) > $block_size;
my $k_ipad = $key ^ (chr(0x36) x $block_size) . $data;
my $k_opad = $key ^ (chr(0x5c) x $block_size) . &Digest($k_ipad);
&Digest($k_opad);
}
sub hmac_hex { unpack("H*", &hmac); }
1;
