RSA implementation using GMP

Simple RSA key generation, text encryption and ciphertext decryption.

usage

key generation:

input: ./rsa -g B
output: P Q N E D

text encryption:

input: ./rsa -e E N M
output: C

ciphertext decryption:

input: ./rsa -d D N C
output: M

B ... size of public modulus in bits
P ... randomly generated prime number
Q ... randomly generated prime number
N ... public modulus
E ... public exponent
D ... private exponent
M ... plaintext message (number, not text)
C ... ciphertext message (number, not text)