Shell Programming and Scripting

awk -F"\¬" '{ print $25" " $26 " " $27 }' /var/IBM/CMA/LandingArea/Analysis/Add.txt | while read x ; do echo $x |md5sum ; done

$ cat md5line.c

#include <openssl/md5.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

int main()
{
        int n;
        MD5_CTX c;
        unsigned char buf[1024], out[MD5_DIGEST_LENGTH];

        while(fgets(buf, 1024, stdin))
        {
                MD5_Init(&c);
                MD5_Update(&c, buf, strlen(buf)-1);
                MD5_Final(out, &c);

                for(n=0; n<MD5_DIGEST_LENGTH; n++)
                        printf("%02x", out[n]);
                fputs("\n",stdout);
        }

        return(0);
}

$ gcc md5line.c -o md5line -lssl # May need "openssl-dev" or something like that

$ printf "%s\n" a b c d e

a
b
c
d
e

$ echo "a" | md5sum # This includes the \n!
60b725f10c9c85c70d97880dfe8191b3  -

$ printf "a" | md5sum # Does not add \n
0cc175b9c0f1b6a831c399e269772661  -

$ printf "%s\n" a b c d e | ./md5line # My code also ignores \n
0cc175b9c0f1b6a831c399e269772661
92eb5ffee6ae2fec3ad71c777531578f
4a8a08f09d37b73795649038408b5f33
8277e0910d750195b448797616e091ad
e1671797c52e15f763380b45e841ec32

$

g++ -c -O -fPIC -Wno-deprecated -m64 -mtune=generic -mcmodel=small md5tester.cpp  -o libmd5teser.so
md5tester.cpp:1:25: error: openssl/md5.h: No such file or directory
md5tester.cpp: In function ‘int main()':
md5tester.cpp:9: error: ‘MD5_CTX' was not declared in this scope
md5tester.cpp:9: error: expected `;' before ‘c'
md5tester.cpp:10: error: ‘MD5_DIGEST_LENGTH' was not declared in this scope
md5tester.cpp:12: error: invalid conversion from ‘unsigned char*' to ‘char*'
md5tester.cpp:12: error:   initializing argument 1 of ‘char* fgets(char*, int, FILE*)'
md5tester.cpp:14: error: ‘c' was not declared in this scope
md5tester.cpp:14: error: ‘MD5_Init' was not declared in this scope
md5tester.cpp:15: error: invalid conversion from ‘unsigned char*' to ‘const char*'
md5tester.cpp:15: error:   initializing argument 1 of ‘size_t strlen(const char*)'
md5tester.cpp:15: error: ‘MD5_Update' was not declared in this scope
md5tester.cpp:16: error: ‘out' was not declared in this scope
md5tester.cpp:16: error: ‘MD5_Final' was not declared in this scope

#!/usr/bin/perl -w
use Digest::MD5 qw(md5 md5_hex md5_base64);

open my $DAT, $ARGV[0] or die "Could not open $ARGV[0]: $!";

while (my $line = <$DAT>) {
  chomp $line;
  my @fld = split /¬/, $line;
  print $line . "¬" . md5_hex($fld[24]." ".$fld[25]." ".$fld[26] . "\n") . "\n";
}

close $DAT;

$ ./addmd5sum.pl /var/IBM/CMA/LandingArea/Analysis/Add.txt > /var/IBM/CMA/LandingArea/Analysis/Add_fixed.txt

Use of uninitialized value in concatenation (.) or string at ./addmd5sum.pl line 9, <$DAT> line 10398.