[Bcrypt-users] Build on Cygwin

[Yves C. <no...@x0...>]

Hi,

I am working on a more standard implementation of VimCrypt which use
blowfish. So I took a look at bcrypt. I am currently working on Cygwin and
Debian. In both distrib I get warning during the build process. I am not
happy with that (see output below).

Fortunately casa (https://github.com/casta/bcrypt) offered a nice github
repo. It would be nice to switch to this new repository and link the debian
package on it? Also we can add a travis.yml?


On Cygwin:

```
$ wget http://bcrypt.sourceforge.net/bcrypt-1.1.tar.gz
$ tar xvzf bcrypt-1.1.tar.gz
$ cd bcrypt-1.1/
$ make
gcc -O2 -Wall  -c main.c
main.c:15:14: warning: ‘optarg’ redeclared without dllimport attribute:
previous dllimport ignored [-Wattributes]
 extern char *optarg;
              ^
main.c:16:12: warning: ‘optind’ redeclared without dllimport attribute:
previous dllimport ignored [-Wattributes]
 extern int optind, optreset, opterr;
            ^
main.c:16:20: warning: ‘optreset’ redeclared without dllimport attribute:
previous dllimport ignored [-Wattributes]
 extern int optind, optreset, opterr;
                    ^
main.c:16:30: warning: ‘opterr’ redeclared without dllimport attribute:
previous dllimport ignored [-Wattributes]
 extern int optind, optreset, opterr;
                              ^
gcc -O2 -Wall  -c blowfish.c
gcc -O2 -Wall  -c rwfile.c
gcc -O2 -Wall  -c keys.c
keys.c: In function ‘mutateKey’:
keys.c:88:23: warning: pointer targets in passing argument 2 of
‘Blowfish_Init’ differ in signedness [-Wpointer-sign]
   Blowfish_Init(&ctx, *key, strlen(*key));
                       ^
In file included from functions.h:11:0,
                 from keys.c:12:
blowfish.h:15:6: note: expected ‘unsigned char *’ but argument is of type
‘char *’
 void Blowfish_Init(BLOWFISH_CTX *ctx, unsigned char *key, int keyLen);
      ^
gcc -O2 -Wall  -c wrapbf.c
wrapbf.c: In function ‘BFEncrypt’:
wrapbf.c:31:24: warning: pointer targets in passing argument 2 of
‘Blowfish_Init’ differ in signedness [-Wpointer-sign]
   Blowfish_Init (&ctx, key, MAXKEYBYTES);
                        ^
In file included from functions.h:11:0,
                 from wrapbf.c:12:
blowfish.h:15:6: note: expected ‘unsigned char *’ but argument is of type
‘char *’
 void Blowfish_Init(BLOWFISH_CTX *ctx, unsigned char *key, int keyLen);
      ^
wrapbf.c: In function ‘BFDecrypt’:
wrapbf.c:84:24: warning: pointer targets in passing argument 2 of
‘Blowfish_Init’ differ in signedness [-Wpointer-sign]
   Blowfish_Init (&ctx, mykey, MAXKEYBYTES);
                        ^
In file included from functions.h:11:0,
                 from wrapbf.c:12:
blowfish.h:15:6: note: expected ‘unsigned char *’ but argument is of type
‘char *’
 void Blowfish_Init(BLOWFISH_CTX *ctx, unsigned char *key, int keyLen);
      ^
gcc -O2 -Wall  -c endian.c
gcc -O2 -Wall  -c wrapzl.c
gcc -O2 -Wall  -o bcrypt main.o blowfish.o rwfile.o keys.o wrapbf.o
endian.o wrapzl.o -L/usr/local/lib -lz
```

On Debain
```
$ make
gcc -O2 -Wall  -c main.c
gcc -O2 -Wall  -c blowfish.c
gcc -O2 -Wall  -c rwfile.c
gcc -O2 -Wall  -c keys.c
keys.c: In function ‘mutateKey’:
keys.c:88:23: warning: pointer targets in passing argument 2 of
‘Blowfish_Init’ differ in signedness [-Wpointer-sign]
   Blowfish_Init(&ctx, *key, strlen(*key));
                       ^
In file included from functions.h:11:0,
                 from keys.c:12:
blowfish.h:15:6: note: expected ‘unsigned char *’ but argument is of type
‘char *’
 void Blowfish_Init(BLOWFISH_CTX *ctx, unsigned char *key, int keyLen);
      ^
gcc -O2 -Wall  -c wrapbf.c
wrapbf.c: In function ‘BFEncrypt’:
wrapbf.c:31:24: warning: pointer targets in passing argument 2 of
‘Blowfish_Init’ differ in signedness [-Wpointer-sign]
   Blowfish_Init (&ctx, key, MAXKEYBYTES);
                        ^
In file included from functions.h:11:0,
                 from wrapbf.c:12:
blowfish.h:15:6: note: expected ‘unsigned char *’ but argument is of type
‘char *’
 void Blowfish_Init(BLOWFISH_CTX *ctx, unsigned char *key, int keyLen);
      ^
wrapbf.c: In function ‘BFDecrypt’:
wrapbf.c:84:24: warning: pointer targets in passing argument 2 of
‘Blowfish_Init’ differ in signedness [-Wpointer-sign]
   Blowfish_Init (&ctx, mykey, MAXKEYBYTES);
                        ^
In file included from functions.h:11:0,
                 from wrapbf.c:12:
blowfish.h:15:6: note: expected ‘unsigned char *’ but argument is of type
‘char *’
 void Blowfish_Init(BLOWFISH_CTX *ctx, unsigned char *key, int keyLen);
      ^
gcc -O2 -Wall  -c endian.c
gcc -O2 -Wall  -c wrapzl.c
gcc -O2 -Wall  -o bcrypt main.o blowfish.o rwfile.o keys.o wrapbf.o
endian.o wrapzl.o -L/usr/local/lib -lz
```