DESCRIPTION

Recode a part of openssl library, and additionnal features, from scratch.

usage: ./ft_ssl command [files] [flags]

A lot of example can be found in unitests folder.
To launch all these unitests scripts (Only works on linux/ubuntu, NOT MAC OS), type :
make test

No C libraries used.
The only externals functions:

open()  
close()  
read()  
write()  
malloc()  
perror()  
exit()  

COMMANDS

"help" can be pass as command to print commands summary.
Random exemples with possible flags is given for each commands. More exemples in unitests folder.

Message Digest commands

• md5
  ./ft_ssl md5 -i Makefile -o ft_ssl_out

• sha256
  echo "42" | ./ft_ssl sha256 Makefile -p

Cipher commands

• base64
  echo "Coucou" | ./ft_ssl base64 -q | ./ft_ssl base64 -d

• des (Default as des-cbc)
  ./ft_ssl des -i Makefile -v 0123456789abcdef -k 1415926535 -q

• des-cbc
  ./ft_ssl des-cbc Makefile -v 0123456789abcdef -o ft_ssl_out

• des-ecb
  cat Makefile | ./ft_ssl des-ecb -k acbbca
./ft_ssl des-ecb Makefile -s 542842e266c5541a -p mybigpwd -iter 666

• pbkdf2 (HMAC is computing with sha256)
  echo -n "Mybigpwd" | ./ft_ssl pbkdf2 -s 542842e266c5541a -iter 42

Standard commands

• genprime
  ./ft_ssl genprime -rand seed_file -min 1000 -max 10000

• isprime
  ./ft_ssl genprime | ./ft_ssl isprime -s 45 -p

• genrsa
  ./ft_ssl genrsa -encout des -v 0123456789abcdef -k 1415926535
./ft_ssl genrsa -pubout -outform DER

• rsa
  ./ft_ssl genrsa | ./ft_ssl rsa -text -check openssl genrsa | ./ft_ssl rsa -pubout | openssl rsa -pubin -text

• rsautl
  echo -n "1234" | ./ft_ssl rsautl -inkey PEM_pubkey -pubin -q | ./ft_ssl rsautl -inkey PEM_privkey -d

FLAGS

Each commands has some of these flags

Global flags :

-help           display related command summary and exit
-i              input file for plaintext
-o              output file for hash
-decin          decode the input with the given hashing command (command flags can ONLY be passed after)
-passin         send password for input decryption (flag -decin <cmd> needs to exist before)
-encout         encode the output with the given hashing command (command flags can ONLY be passed after)
-passout        send password for output encryption (flag -encout <cmd> needs to exist before)
-a              decode/encode the input/output in base64, depending on the encrypt mode
-A              used with -[a | -decin base64 | -encout base64] to specify base64 buffer as a single line
-s              print the sum of the given string
-p              echo STDIN to STDOUT and append the checksum to STDOUT
-r              reverse the format of the output
-q              quiet mode

Only ciphers flags

-e              encrypt mode (default mode) (-e has priority over -d)
-d              decrypt mode
-s          send the salt in hex (Overwrite global -s behavior)
-iter       specify the iteration count of PBKDF2

Only DES:
    -k          send the key in hex
    -p          send password in ascii (Overwrite global -s behavior)
    -v          send initialization vector in hex
    -P          print the vector/key and exit
    -nopad      disable standard block padding

Only RSA cryptosystem flags

-pubin          expect a public key in input file (private key by default)
-pubout         output a public key (private key by default). This option is automatically set if the input is a public key.
-inform         input format [PEM | DER] (Default as PEM)
-outform        output format [PEM | DER] (Default as PEM)
-text           print key properties in hex
-modulus        print RSA key modulus in hex
-check          verify key consistency
-noout          don`t print key out
-rand           a file containing random data used to seed the random rsa generator

Only rsautl flag:
    -inkey      send a file as input key

Only genprime flags

-min            lower bound for prime generation (Default as 0)
-max            upper bound for prime generation (Default as 2^63 - 1)
-rand           a file containing random data used to seed the random rsa generator

Only isprime flag

-prob           probability requested for Miller-Rabin primality test in percentile (0 < p <= 100)