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1 //$Header: /cvsroot/esrg/sfesrg/esrgpcpj/isepwchk/pwchk/sncheck.c,v 1.3 2002/01/31 13:16:15 dtashley Exp $
2 //------------------------------------------------------------------------
3 // Dave Ashley, 12/09/00
4 //------------------------------------------------------------------------
5 //--------------------------------------------------------------------------------
6 //Copyright 2001 David T. Ashley
7 //-------------------------------------------------------------------------------------------------
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570 //section 13, concerning interaction through a network will apply to the
571 //combination as such.
572 //
573 // 14. Revised Versions of this License.
574 //
575 // The Free Software Foundation may publish revised and/or new versions of
576 //the GNU General Public License from time to time. Such new versions will
577 //be similar in spirit to the present version, but may differ in detail to
578 //address new problems or concerns.
579 //
580 // Each version is given a distinguishing version number. If the
581 //Program specifies that a certain numbered version of the GNU General
582 //Public License "or any later version" applies to it, you have the
583 //option of following the terms and conditions either of that numbered
584 //version or of any later version published by the Free Software
585 //Foundation. If the Program does not specify a version number of the
586 //GNU General Public License, you may choose any version ever published
587 //by the Free Software Foundation.
588 //
589 // If the Program specifies that a proxy can decide which future
590 //versions of the GNU General Public License can be used, that proxy's
591 //public statement of acceptance of a version permanently authorizes you
592 //to choose that version for the Program.
593 //
594 // Later license versions may give you additional or different
595 //permissions. However, no additional obligations are imposed on any
596 //author or copyright holder as a result of your choosing to follow a
597 //later version.
598 //
599 // 15. Disclaimer of Warranty.
600 //
601 // THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
602 //APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
603 //HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
604 //OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
605 //THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
606 //PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
607 //IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
608 //ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
609 //
610 // 16. Limitation of Liability.
611 //
612 // IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
613 //WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
614 //THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
615 //GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
616 //USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
617 //DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
618 //PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
619 //EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
620 //SUCH DAMAGES.
621 //
622 // 17. Interpretation of Sections 15 and 16.
623 //
624 // If the disclaimer of warranty and limitation of liability provided
625 //above cannot be given local legal effect according to their terms,
626 //reviewing courts shall apply local law that most closely approximates
627 //an absolute waiver of all civil liability in connection with the
628 //Program, unless a warranty or assumption of liability accompanies a
629 //copy of the Program in return for a fee.
630 //
631 // END OF TERMS AND CONDITIONS
632 //
633 // How to Apply These Terms to Your New Programs
634 //
635 // If you develop a new program, and you want it to be of the greatest
636 //possible use to the public, the best way to achieve this is to make it
637 //free software which everyone can redistribute and change under these terms.
638 //
639 // To do so, attach the following notices to the program. It is safest
640 //to attach them to the start of each source file to most effectively
641 //state the exclusion of warranty; and each file should have at least
642 //the "copyright" line and a pointer to where the full notice is found.
643 //
644 // <one line to give the program's name and a brief idea of what it does.>
645 // Copyright (C) <year> <name of author>
646 //
647 // This program is free software: you can redistribute it and/or modify
648 // it under the terms of the GNU General Public License as published by
649 // the Free Software Foundation, either version 3 of the License, or
650 // (at your option) any later version.
651 //
652 // This program is distributed in the hope that it will be useful,
653 // but WITHOUT ANY WARRANTY; without even the implied warranty of
654 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
655 // GNU General Public License for more details.
656 //
657 // You should have received a copy of the GNU General Public License
658 // along with this program. If not, see <http://www.gnu.org/licenses/>.
659 //
660 //Also add information on how to contact you by electronic and paper mail.
661 //
662 // If the program does terminal interaction, make it output a short
663 //notice like this when it starts in an interactive mode:
664 //
665 // <program> Copyright (C) <year> <name of author>
666 // This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
667 // This is free software, and you are welcome to redistribute it
668 // under certain conditions; type `show c' for details.
669 //
670 //The hypothetical commands `show w' and `show c' should show the appropriate
671 //parts of the General Public License. Of course, your program's commands
672 //might be different; for a GUI interface, you would use an "about box".
673 //
674 // You should also get your employer (if you work as a programmer) or school,
675 //if any, to sign a "copyright disclaimer" for the program, if necessary.
676 //For more information on this, and how to apply and follow the GNU GPL, see
677 //<http://www.gnu.org/licenses/>.
678 //
679 // The GNU General Public License does not permit incorporating your program
680 //into proprietary programs. If your program is a subroutine library, you
681 //may consider it more useful to permit linking proprietary applications with
682 //the library. If this is what you want to do, use the GNU Lesser General
683 //Public License instead of this License. But first, please read
684 //<http://www.gnu.org/philosophy/why-not-lgpl.html>.
685 //-------------------------------------------------------------------------------------------------
686 //--------------------------------------------------------------------------------
687 // Serial number validation DLL to be used with InstallShield Express,
688 // Version 3.X.
689 //
690 // This DLL is patterned nearly exactly after the example from
691 // InstallShield.
692 //
693 // Here are the requirements for the algorithm employed.
694 // o It must not be obvious (but it isn't required to be difficult,
695 // as it doesn't need to be too difficult before it isn't the
696 // weakest link anymore). It is also noteworthy that
697 // a single user won't have access to more than a few valid
698 // install codes, and it would be difficult to guess the
699 // hash function.
700 // o It must be reproducible using a Tcl script (this is a
701 // potential mechanism for generating serial numbers to go to
702 // Digibuy). (This is the reason for the 30-bit integers--in
703 // Tcl, it might not be possible to use an integer as "unsigned",
704 // so the upper two bits aren't used so that algorithm will be
705 // reproducible using only signed longs.)
706 // o It must be computationally inexpensive.
707 //------------------------------------------------------------------------
708 // Each serial number is broken into three components, which are
709 // concatenated and separated by hyphens.
710 //
711 // a)Digibuy Product Number (11 decimal digits)
712 // ------------------------------------------
713 // This is the product number from Digibuy, 11 characters,
714 // all decimal digits.
715 //
716 // b)Sale Number (8 decimal digits)
717 // ------------------------------
718 // This is the sale number, 8 decimal digits. These numbers
719 // are numbered consecutively, starting at 00000001, and
720 // are unique within a product. Another way of looking at
721 // this number is that it provides a random element so that
722 // the hash code will always be different even within the
723 // same product.
724 //
725 // c)Hash Code (6 hexadecimal digits)
726 // --------------------------------
727 // This is a hash generated from (a) and (b). The 24-bit
728 // hash code makes any kind of trial and error approach to
729 // trying to guess a valid install code impractical. The
730 // serial number validation computes the hash code from
731 // (a) and (b) and compares it to what was entered.
732 //------------------------------------------------------------------------
733 // The hash function won't be documented. The code should be
734 // enough. It has no special or educated mathematical basis.
735 // It is just contortion, with no mathematical basis to make it
736 // any more valid than any other contortion.
737 //------------------------------------------------------------------------
738 // To call the function in the DLL from InstallShield Express, there
739 // are two adjustments necessary.
740 //
741 // a)The success value must be set to 200. (I don't know why
742 // that value was chosen in the example from InstallShield,
743 // but it is bad luck to mess with success when you don't
744 // completely understand all the factors that may have led
745 // to the selection of 200.)
746 //
747 // b)The name of the entry point must be specified to
748 // InstallShield as _SerialCheck@20. I do not know
749 // why the compiler adds the "@20" to the name, and
750 // I was not able to pursuade it to stop. It seems to
751 // work fine none the less.
752 //------------------------------------------------------------------------
753
754 #include <windows.h> // Included to allow use of MessageBox()
755 #include <string.h> // Included to allow use of string functions
756 #include <stdio.h>
757
758
759 // DllMain: DLL Initialization Routine: Not used here.
760
761 __declspec(dllexport)
762 int WINAPI DllMain(HINSTANCE hinstDLL,DWORD fdwReason,LPVOID lpvReserved)
763 {
764 return (1);
765 }
766
767 // Definition of Return Values:
768 #define SN_VALID_RETURN 100 // Return Value Indicating Success
769 #define SN_INVALID_RETURN 0 // Return Value Indicating Retry
770
771 #define SN_VALIDATION_BYPASS (0)
772 //Set TRUE if should bypass password authentication, for
773 //testing. If bypassing, all hash key digits must
774 //be zero.
775 #define SN_ROLL_AMOUNT (1)
776 //Number of bits to roll each time.
777
778 // Function Prototypes:
779 int ValidateSN( HWND, LPSTR ); // Serial Number Validation Routine
780
781
782 ////////////////////////////////////////////////////////////////////////////////////
783 //
784 // SerialCheck():
785 //
786 // Main function called by Express. The name of this function must match the
787 // name specified in the "Settings" Tab for the "User Information" Dialog Box of
788 // your Express installation project (ie. in the "Verification Function Name"
789 // parameter). NOTE: This name is case-sensitive.
790 //
791 // Prototype: CHAR APIENTRY SerialCheck( HWND, LPSTR, LPSTR, LPSTR, LPSTR )
792 //
793 // Parameters (supplied from Express):
794 //
795 // hwnd = Handle to the main window handle of the installation
796 // sSRCDIR = Source Directory of installation ( <SRCDIR> )
797 // sSUPPORTDIR = Source Directory of installation ( <SUPPORTDIR> )
798 // sSerialNumber = Serial Number supplied by end-user in "User Information" dialog
799 // sReserved = NULL and is reserved for future use.
800 //
801 // Return Values (Sent to Express):
802 //
803 // (NOTE: These parameters should match those specified in your installation project)
804 //
805 // SN_VALID_RETURN = Indicates Express should continue (Serial Number is valid)
806 // SN_INVALID_RETURN = Indicates Express should retry (Serial Number is invalid)
807 //
808 ////////////////////////////////////////////////////////////////////////////////////
809 __declspec(dllexport)
810 CHAR APIENTRY SerialCheck(HWND hwnd, LPSTR sSRCDIR, LPSTR sSUPPORTDIR,
811 LPSTR sSerialNumber, LPSTR sReserved)
812 {
813 // Define Local Variables:
814 int bValidResult; // Validation State of Serial Number
815
816 #if 0 // Display MessageBox ONLY for debugging.
817 // Display Serial Number That is Received
818 MessageBox(NULL, sSerialNumber, "Serial Number", MB_OK);
819 #endif
820
821 // Place Serial number Validation routine Here
822 // NOTE: The following function calls a sample validation routine.
823
824 bValidResult = ValidateSN(hwnd, sSerialNumber);
825
826 // Return Proper Value Based Upon Validation Routine
827 if ( bValidResult == 1 )
828 {
829 // Serial Number is Valid: Inform Express to Continue
830 return (CHAR) SN_VALID_RETURN;
831 }
832 else
833 {
834 // Serial Number is Invalid: Inform Express to Retry
835 MessageBox( hwnd, "Invalid Serial Number", "SERIAL NUMBER ERROR",
836 MB_OK | MB_ICONEXCLAMATION );
837
838 return (CHAR) SN_INVALID_RETURN;
839 }
840 }
841
842
843 /* Returns a 30-bit random number based on the digit passed.
844 ** There is no rhyme or reason to these numbers--they were
845 ** obtained using the random function on an HP calculator.
846 */
847 void ValidateSN_RandDigitKey(char in, unsigned long *out)
848 {
849 if (in == '0')
850 {
851 *out = 0x1C644392;
852 }
853 else if (in == '1')
854 {
855 *out = 0x292662DC;
856 }
857 else if (in == '2')
858 {
859 *out = 0x316303D8;
860 }
861 else if (in == '3')
862 {
863 *out = 0x1D660DC5;
864 }
865 else if (in == '4')
866 {
867 *out = 0x0E5E396D;
868 }
869 else if (in == '5')
870 {
871 *out = 0x069D4A3A;
872 }
873 else if (in == '6')
874 {
875 *out = 0x187DB7D5;
876 }
877 else if (in == '7')
878 {
879 *out = 0x0CAF6C5C;
880 }
881 else if (in == '8')
882 {
883 *out = 0x23A4CDFB;
884 }
885 else
886 {
887 *out = 0x27FEC1C4;
888 }
889 }
890
891
892 /* Rolls a 30-bit integer argument left by the specified
893 ** number of places.
894 */
895 void ValidateSN_RollLeft(unsigned long *arg, int n)
896 {
897 unsigned long i;
898
899 n &= 0xF; /* Be sure not too large. */
900
901 while (n--)
902 {
903 i = *arg;
904 *arg <<= 1;
905 *arg &= 0x3FFFFFFE;
906 if (i & 0x20000000)
907 *arg |= 0x00000001;
908 }
909 }
910
911
912 /* Maps from the least significant nibble of a 30-bit
913 ** integer to a hexadecimal digit.
914 */
915 char ValidateSN_ToDigit(unsigned long arg)
916 {
917 char rv;
918
919 arg &= 0xF;
920
921 switch (arg)
922 {
923 default:
924 case 0: rv = '0'; break;
925 case 1: rv = '1'; break;
926 case 2: rv = '2'; break;
927 case 3: rv = '3'; break;
928 case 4: rv = '4'; break;
929 case 5: rv = '5'; break;
930 case 6: rv = '6'; break;
931 case 7: rv = '7'; break;
932 case 8: rv = '8'; break;
933 case 9: rv = '9'; break;
934 case 10: rv = 'A'; break;
935 case 11: rv = 'B'; break;
936 case 12: rv = 'C'; break;
937 case 13: rv = 'D'; break;
938 case 14: rv = 'E'; break;
939 case 15: rv = 'F'; break;
940 }
941
942 return rv;
943 }
944
945 //Returns the upper-case version of a lower-case letter.
946 //Anything not a lower-case letter isn't changed.
947 char ValidateSN_ToUpper(char in)
948 {
949 if ((in >= 'a') && (in <= 'z'))
950 {
951 return(in - ('a'-'A'));
952 }
953 else
954 {
955 return(in);
956 }
957 }
958
959
960 ////////////////////////////////////////////////////////////////////////////////////
961 //
962 // ValidateSN():
963 //
964 // Serial Number validation routine. This function performs the actual
965 // validation check of the serial number.
966 //
967 // Prototype: int ValidateSN( LPSTR )
968 //
969 // Parameter:
970 //
971 // sSerialNumber = The Serial Number provided by the end-user
972 //
973 // Return Values:
974 //
975 // 1 = Indicates that the Serial Number is valid
976 // 0 = Indicates that the Serial Number is invalid
977 //
978 ////////////////////////////////////////////////////////////////////////////////////
979
980 int ValidateSN( HWND hwnd, LPSTR sSerialNumber )
981 {
982 int iSNLen;
983 //Length of Serial Number
984 int i;
985 //General indexing variable.
986 unsigned long hash;
987 //The hash value being calculated.
988 unsigned long_temp;
989 //Long temporary variable.
990 char part_num[12];
991 //The part number, from DigiKey, with a null terminator.
992 char sale_num[9];
993 //The sale number, with null terminator.
994 char hash_result_in[7];
995 //The hash result from the input into the serial
996 //number dialog.
997 char hash_result_calculated[7];
998 //The hash result calculated. This should match
999 //the one input for a valid serial number.
1000
1001 //Generally, we can count on the input InstallShield
1002 //Express being formatted correctly because of the
1003 //mask entered in the configuration. Here guard only
1004 //against errors that threaten a memory overrun
1005 //and so forth.
1006
1007 //If the validation bypass flag is set, accept anything.
1008 #if SN_VALIDATION_BYPASS
1009 return(1);
1010 #endif
1011
1012 //The total length of the string from IntallShield
1013 //must be 27 characters without exception.
1014 iSNLen = strlen( sSerialNumber );
1015 // Get Length of Serial Number
1016
1017 if (iSNLen != 27)
1018 return 0;
1019
1020 //Copy the first 11 characters of the serial number
1021 //to the reserved area.
1022 for (i=0; i<11; i++)
1023 {
1024 part_num[i] = sSerialNumber[i];
1025 }
1026 part_num[11] = 0;
1027
1028 #if 0
1029 //For development only, useful to see part number.
1030 MessageBox( hwnd, part_num, "PART NUMBER",
1031 MB_OK | MB_ICONEXCLAMATION );
1032 #endif
1033
1034 //Copy the 8 digits that should be the sale number.
1035 for (i=0; i<8; i++)
1036 {
1037 sale_num[i] = sSerialNumber[i+12];
1038 }
1039 sale_num[8] = 0;
1040
1041 #if 0
1042 //For development only, useful to see sale number.
1043 MessageBox( hwnd, sale_num, "SALE NUMBER",
1044 MB_OK | MB_ICONEXCLAMATION );
1045 #endif
1046
1047 //Copy the six digits that should be the hash value
1048 for (i=0; i<6; i++)
1049 {
1050 hash_result_in[i] = sSerialNumber[i+21];
1051 }
1052 hash_result_in[6] = 0;
1053
1054 #if 0
1055 //For development only, useful to see hash result in.
1056 MessageBox( hwnd, hash_result_in, "HASH_RESULT_IN",
1057 MB_OK | MB_ICONEXCLAMATION );
1058 #endif
1059
1060 #if 1
1061 //Can bind to a specific product number here. Can
1062 //refuse to validate if SN entered is for the wrong product.
1063 //Constant plugged in below.
1064 if (strcmp("97647784511", part_num))
1065 return(0);
1066 #endif
1067
1068 //Now calculate the hash.
1069 hash = 0;
1070
1071 //Incorporate the part number.
1072 for (i=0; i<11; i++)
1073 {
1074 ValidateSN_RandDigitKey(part_num[i], &long_temp);
1075 hash ^= long_temp;
1076 ValidateSN_RollLeft(&hash, SN_ROLL_AMOUNT);
1077 }
1078
1079 //Incorporate the sale number.
1080 for (i=0; i<8; i++)
1081 {
1082 ValidateSN_RandDigitKey(sale_num[i], &long_temp);
1083 hash ^= long_temp;
1084 ValidateSN_RollLeft(&hash, SN_ROLL_AMOUNT);
1085 }
1086
1087 //Stuff the hash into the calculated hash.
1088 for (i=5; i>=0; i--)
1089 {
1090 hash_result_calculated[i] = ValidateSN_ToDigit(hash);
1091 hash >>= 4;
1092 }
1093 hash_result_calculated[6] = 0;
1094
1095 #if 0
1096 //For development only, useful to see hash result.
1097 MessageBox( hwnd, hash_result_calculated, "CALCULATED HASH VALUE",
1098 MB_OK | MB_ICONEXCLAMATION );
1099 #endif
1100
1101 //The password passes if and only if each and every
1102 //digit is the same.
1103 for (i=0; i<6; i++)
1104 {
1105 if (ValidateSN_ToUpper(hash_result_in[i]) !=
1106 ValidateSN_ToUpper(hash_result_calculated[i]))
1107 {
1108 return(0);
1109 }
1110 }
1111
1112 return(1);
1113 }
1114
1115 /*
1116 * $Log: sncheck.c,v $
1117 * Revision 1.3 2002/01/31 13:16:15 dtashley
1118 * Version control keywords cleaned up.
1119 *
1120 * Revision 1.2 2002/01/31 13:14:32 dtashley
1121 * Version control keywords added to source files.
1122 *
1123 * $History: sncheck.c $
1124 *
1125 * ***************** Version 2 *****************
1126 * User: Dtashley Date: 12/22/00 Time: 3:53p
1127 * Updated in $/Installshield-Digibuy Password Validation DLL/Src
1128 * Product-specific validation added.
1129 *
1130 * ***************** Version 1 *****************
1131 * User: Dtashley Date: 12/11/00 Time: 1:36a
1132 * Created in $/Installshield-Digibuy Password Validation DLL/Src
1133 * Initial check-in.
1134 *
1135 */
1136
1137 /* End of SNCHECK.C */

dashley@gmail.com
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