You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
2.7 KiB
69 lines
2.7 KiB
Check the CC and CFLAGS lines in the makefile |
|
|
|
If your C library does not support the times(3) function, change the |
|
#define TIMES to |
|
#undef TIMES in speed.c |
|
If it does, check the HZ value for the times(3) function. |
|
If your system does not define CLK_TCK it will be assumed to |
|
be 100.0. |
|
|
|
If possible use gcc v 2.7.? |
|
Turn on the maximum optimising (normally '-O3 -fomit-frame-pointer' for gcc) |
|
In recent times, some system compilers give better performace. |
|
|
|
type 'make' |
|
|
|
run './destest' to check things are ok. |
|
run './rpw' to check the tty code for reading passwords works. |
|
run './speed' to see how fast those optimisations make the library run :-) |
|
run './des_opts' to determin the best compile time options. |
|
|
|
The output from des_opts should be put in the makefile options and des_enc.c |
|
should be rebuilt. For 64 bit computers, do not use the DES_PTR option. |
|
For the DEC Alpha, edit des.h and change DES_LONG to 'unsigned int' |
|
and then you can use the 'DES_PTR' option. |
|
|
|
The file options.txt has the options listed for best speed on quite a |
|
few systems. Look and the options (UNROLL, PTR, RISC2 etc) and then |
|
turn on the relevant option in the Makefile. |
|
|
|
There are some special Makefile targets that make life easier. |
|
make cc - standard cc build |
|
make gcc - standard gcc build |
|
make x86-elf - x86 assembler (elf), linux-elf. |
|
make x86-out - x86 assembler (a.out), FreeBSD |
|
make x86-solaris- x86 assembler |
|
make x86-bsdi - x86 assembler (a.out with primative assembler). |
|
|
|
If at all possible use the assembler (for Windows NT/95, use |
|
asm/win32.obj to link with). The x86 assembler is very very fast. |
|
|
|
A make install will by default install |
|
libdes.a in /usr/local/lib/libdes.a |
|
des in /usr/local/bin/des |
|
des_crypt.man in /usr/local/man/man3/des_crypt.3 |
|
des.man in /usr/local/man/man1/des.1 |
|
des.h in /usr/include/des.h |
|
|
|
des(1) should be compatible with sunOS's but I have been unable to |
|
test it. |
|
|
|
These routines should compile on MSDOS, most 32bit and 64bit version |
|
of Unix (BSD and SYSV) and VMS, without modification. |
|
The only problems should be #include files that are in the wrong places. |
|
|
|
These routines can be compiled under MSDOS. |
|
I have successfully encrypted files using des(1) under MSDOS and then |
|
decrypted the files on a SparcStation. |
|
I have been able to compile and test the routines with |
|
Microsoft C v 5.1 and Turbo C v 2.0. |
|
The code in this library is in no way optimised for the 16bit |
|
operation of MSDOS. |
|
|
|
When building for glibc, ignore all of the above and just unpack into |
|
glibc-1.??/des and then gmake as per normal. |
|
|
|
As a final note on performace. Certain CPUs like sparcs and Alpha often give |
|
a %10 speed difference depending on the link order. It is rather anoying |
|
when one program reports 'x' DES encrypts a second and another reports |
|
'x*0.9' the speed.
|
|
|