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Merge pull request #1564 from xexyl/cdupont91-alts

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Remove an alt version of 1991/cdupont
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Landon Curt Noll authored and GitHub committed 2023-11-26 09:25:45 -07:00
2 parents 0b580f4db5 e639c38c76
commit 38b7f50efb
7 files changed
+102 -164
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1991/cdupont/.gitignore
-1
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@@ -1,6 +1,5 @@
cdupont cdupont
cdupont.alt cdupont.alt
cdupont.alt2 cdupont.alt2
cdupont.alt3
cdupont.orig cdupont.orig
prog.orig prog.orig
1991/cdupont/Makefile
+3 -3
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@@ -38,7 +38,7 @@ include ../../var.mk
# Common C compiler warnings to silence # Common C compiler warnings to silence
# #
CSILENCE= -Wno-unused-label -Wno-strict-prototypes CSILENCE= -Wno-unused-label -Wno-strict-prototypes -Wno-implicit-int
# Common C compiler warning flags # Common C compiler warning flags
# #
@@ -111,8 +111,8 @@ OBJ= ${PROG}.o
DATA= DATA=
TARGET= ${PROG} TARGET= ${PROG}
# #
ALT_OBJ= ${PROG}.alt.o ${PROG}.alt2.o ${PROG}.alt3.o ALT_OBJ= ${PROG}.alt.o ${PROG}.alt2.o
ALT_TARGET= ${PROG}.alt ${PROG}.alt2 ${PROG}.alt3 ALT_TARGET= ${PROG}.alt ${PROG}.alt2
################# #################
1991/cdupont/README.md
+9 -10
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@@ -4,9 +4,10 @@
make all make all
``` ```
There are three alt versions which demonstrate a problem that the code documents There are two alt versions that demonstrate a problem that the code documents
(as an obfuscation technique) and what the judges document so you can see what (as an obfuscation technique) and what the judges document, respectively, so
it looks like. See [alternate code](#alternate-code) below for more details. that you can see what the results are. See [alternate code](#alternate-code)
below for more details.
## To use: ## To use:
@@ -18,14 +19,13 @@ it looks like. See [alternate code](#alternate-code) below for more details.
## Alternate code: ## Alternate code:
These three versions show what will happen if certain things are done that were These two versions show what will happen if certain things are done that were
warned against: if you remove a comment and more so an unused `goto` label or if warned against: if you remove a comment and more so an unused `goto` label or if
you beautify it. The [cdupont.alt.c](cdupont.alt.c) is the one with both the you beautify it. The [cdupont.alt.c](cdupont.alt.c) is the one with both the
unused `goto` label and comments removed, the [cdupont.alt2.c](cdupont.alt2.c) unused `goto` label and comments removed and the [cdupont.alt2.c](cdupont.alt2.c)
is the version that has these things removed and is also beautified and the is beautified. This required changing the `s` macro to be `__FILE__` as
[cdupont.alt3.c](cdupont.alt3.c) is just beautified. This required changing the otherwise it would read in the original code which doesn't have the
`s` macro to be `__FILE__` as otherwise it would read in the original code which modifications.
doesn't have the modifications.
### Alternate build: ### Alternate build:
@@ -42,7 +42,6 @@ make alt
```sh ```sh
./cdupont.alt ./cdupont.alt
./cdupont.alt2 ./cdupont.alt2
./cdupont.alt3
``` ```
Enjoy! :-) Enjoy! :-)
1991/cdupont/cdupont.alt.c
+20 -57
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@@ -1,61 +1,24 @@
/* common sense to nohonest programmer */ /* common sense to nohonest programmer */
#include <stdio.h> #include <stdio.h>
main () main(){int x ,gi=4,i,f,ri=1,httxkbl=1,m=012;long cd=0x5765248d,n;
{ char u[0x50][032];FILE *ind;
int x, gi = 4, i, f, ri = 1, httxkbl = 1, m = 012; ind=fopen(s,t); for(i=0; i<0x1a; i++){goto daswjhkls;vhjsgfdy1l1gjhd:;}
long cd = 0x5765248d, n; /*borntorun.*/goto c0g0;cOgO:i=0;fclose(ind);c0gO:
char u[0x50][032]; x= u [gi][m];
FILE *ind; if( m==gi){x=0x70;f=0x68;}else goto cOg0 ; b:putchar(x); if(
ind = fopen (s, t); !(n-httxkbl++))
for (i = 0; i < 0x1a; i++)
{
goto daswjhkls;
vhjsgfdy1l1gjhd:;
}
/*borntorun.*/ goto c0g0;
cOgO:i = 0;
fclose (ind);
c0gO:
x = u[gi][m];
if (m == gi)
{
x = 0x70;
f = 0x68;
}
else
goto cOg0;
b:putchar (x);
if (!(n - httxkbl++))
#define yank(x) putchar(x) #define yank(x) putchar(x)
{ {httxkbl=1; yank(' ');goto
httxkbl = 1; hxi;}goto bl;
yank (' '); daswjhkls: fgets(u[i], 0120, ind);
goto hxi; /*obfuscated, eh? */goto
}
goto bl;
daswjhkls:fgets (u[i], 0120, ind);
/*obfuscated, eh? */ goto
vhjsgfdy1l1gjhd; vhjsgfdy1l1gjhd;
c0g0:n = cd & 0x40000000L >> 0x1e; c0g0 : n=cd&0x40000000L>>0x1e;
goto cOgO; goto cOgO; g6w:
g6w: if(x!=0x2e){i++;goto c0gO;}else /*
if (x != 0x2e) injail*/yank('\n');goto vhjsgfdyl1lgjhd;
{ cOg0 :
i++; f=u[m][gi];goto b;bl:m=(i+1)*(4*
goto c0gO; x+3*f)%032;gi=(i+1)*(x+2*f)%0x1a; goto g6w;
} hxi:cd^= n= cd&(7<<3*(014-++ri));
else /* n >>=3*(12-ri); goto bl;vhjsgfdyl1lgjhd:;}
injail */
yank ('\n');
goto vhjsgfdyl1lgjhd;
cOg0:
f = u[m][gi];
goto b;
bl:m = (i + 1) * (4 * x + 3 * f) % 032;
gi = (i + 1) * (x + 2 * f) % 0x1a;
goto g6w;
hxi:cd ^= n = cd & (7 << 3 * (014 - ++ri));
n >>= 3 * (12 - ri);
goto bl;
vhjsgfdyl1lgjhd:;
}
1991/cdupont/cdupont.alt2.c
+61 -20
View File
@@ -1,23 +1,64 @@
/* common sense to nohonest programmer */
#include <stdio.h> #include <stdio.h>
main(){int x ,gi=4,i,f,ri=1,httxkbl=1,m=012;long cd=0x5765248d,n; main ()
char u[0x50][032];FILE *ind; {
ind=fopen(s,t); for(i=0; i<0x1a; i++){goto daswjhkls;vhjsgfdy1l1gjhd:;} int x, gi = 4, i, f, ri = 1, httxkbl = 1, m = 012;
/*borntorun.*/goto c0g0;cOgO:i=0;fclose(ind);c0gO: long cd = 0x5765248d, n;
x= u [gi][m]; char u[0x50][032];
if( m==gi){x=0x70;f=0x68;}else goto cOg0 ; b:putchar(x); if( FILE *ind;
!(n-httxkbl++)) ind = fopen (s, t);
for (i = 0; i < 0x1a; i++)
{
goto daswjhkls;
vhjsgfdy1l1gjhd:;
}
/*borntorun.*/ goto c0g0;
cOgO:i = 0;
fclose (ind);
c0gO:
x = u[gi][m];
sorryfor_this_unused_but_very_needed_label:
if (m == gi)
{
x = 0x70;
f = 0x68;
}
else
goto cOg0;
b:putchar (x);
if (!(n - httxkbl++))
#define yank(x) putchar(x) #define yank(x) putchar(x)
{httxkbl=1; yank(' ');goto {
hxi;}goto bl; httxkbl = 1;
daswjhkls: fgets(u[i], 0120, ind); yank (' ');
/*obfuscated, eh? */goto goto hxi;
}
goto bl;
/* hardlyundrstandable, but
likely to be missed if removed */
daswjhkls:fgets (u[i], 0120, ind);
/*obfuscated, eh? */ goto
vhjsgfdy1l1gjhd; vhjsgfdy1l1gjhd;
c0g0 : n=cd&0x40000000L>>0x1e; c0g0:n = cd & 0x40000000L >> 0x1e;
goto cOgO; g6w: goto cOgO;
if(x!=0x2e){i++;goto c0gO;}else /* g6w:
injail*/yank('\n');goto vhjsgfdyl1lgjhd; if (x != 0x2e)
cOg0 : {
f=u[m][gi];goto b;bl:m=(i+1)*(4* i++;
x+3*f)%032;gi=(i+1)*(x+2*f)%0x1a; goto g6w; goto c0gO;
hxi:cd^= n= cd&(7<<3*(014-++ri)); }
n >>=3*(12-ri); goto bl;vhjsgfdyl1lgjhd:;} else /*
injail */
yank ('\n');
goto vhjsgfdyl1lgjhd;
cOg0:
f = u[m][gi];
goto b;
bl:m = (i + 1) * (4 * x + 3 * f) % 032;
gi = (i + 1) * (x + 2 * f) % 0x1a;
goto g6w;
hxi:cd ^= n = cd & (7 << 3 * (014 - ++ri));
n >>= 3 * (12 - ri);
goto bl;
vhjsgfdyl1lgjhd:;
}
1991/cdupont/cdupont.alt3.c
-64
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@@ -1,64 +0,0 @@
/* common sense to nohonest programmer */
#include <stdio.h>
main ()
{
int x, gi = 4, i, f, ri = 1, httxkbl = 1, m = 012;
long cd = 0x5765248d, n;
char u[0x50][032];
FILE *ind;
ind = fopen (s, t);
for (i = 0; i < 0x1a; i++)
{
goto daswjhkls;
vhjsgfdy1l1gjhd:;
}
/*borntorun.*/ goto c0g0;
cOgO:i = 0;
fclose (ind);
c0gO:
x = u[gi][m];
sorryfor_this_unused_but_very_needed_label:
if (m == gi)
{
x = 0x70;
f = 0x68;
}
else
goto cOg0;
b:putchar (x);
if (!(n - httxkbl++))
#define yank(x) putchar(x)
{
httxkbl = 1;
yank (' ');
goto hxi;
}
goto bl;
/* hardlyundrstandable, but
likely to be missed if removed */
daswjhkls:fgets (u[i], 0120, ind);
/*obfuscated, eh? */ goto
vhjsgfdy1l1gjhd;
c0g0:n = cd & 0x40000000L >> 0x1e;
goto cOgO;
g6w:
if (x != 0x2e)
{
i++;
goto c0gO;
}
else /*
injail */
yank ('\n');
goto vhjsgfdyl1lgjhd;
cOg0:
f = u[m][gi];
goto b;
bl:m = (i + 1) * (4 * x + 3 * f) % 032;
gi = (i + 1) * (x + 2 * f) % 0x1a;
goto g6w;
hxi:cd ^= n = cd & (7 << 3 * (014 - ++ri));
n >>= 3 * (12 - ri);
goto bl;
vhjsgfdyl1lgjhd:;
}
thanks-for-fixes.md
+9 -9
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@@ -1098,15 +1098,15 @@ more useful way to exit, just entering `q` followed by enter.
## [1991/cdupont](1991/cdupont/cdupont.c) ([README.md](1991/cdupont/README.md])) ## [1991/cdupont](1991/cdupont/cdupont.c) ([README.md](1991/cdupont/README.md]))
Cody provided [three alternate](1991/cdupont/README.md#alternate-code) versions Cody provided [two alternate](1991/cdupont/README.md#alternate-code) versions to
that allow one to see what would happen if one were to beautify the program or see what would happen if certain things were done that were warned against: [one
remove a `goto` label or a comment that was in the original code. This required that has an unused `goto` label and a comment
changing the `s` macro to be `__FILE__` (which is more reliable anyway) as removed](1991/cdupont/cdupont.alt.c) and [another that was
otherwise it would read in the original code and not demonstrate the problem. beautified](1991/cdupont/cdupont.alt2.c).
[One version](1991/cdupont/cdupont.alt2.c) has the comments and unused `goto`
label removed and [the other](1991/cdupont/cdupont.alt.c) has the comments and This required changing the `s` macro to be `__FILE__` (which is more reliable
label removed and it is also beautified. The [third anyway) as otherwise it would read in the original code and not demonstrate the
one](1991/cdupont/cdupont.alt3.c) is just beautified. problem.
## [1991/davidguy](1991/davidguy/davidguy.c) ([README.md](1991/davidguy/README.md])) ## [1991/davidguy](1991/davidguy/davidguy.c) ([README.md](1991/davidguy/README.md]))