README.md

RSA

This package implement the RSA cryptosystem. Private keys are generated using math.TestPrime for random value.

The following constant in main.go file defines the size of p,q random primes in bytes:

const size = 128

The size of n and phi(n) will be 2*n.

Example of usage:

    key, err := GeneratePrivateKey()
    if err != nil {
        panic(err)
    }

    msg := new(big.Int).SetBytes([]byte("Hello World")) // should be in [1...n). Check for bytes count will be enaught.
	
	// Encryption
    cypher := Encrypt(msg, key.PublicKey)

    // Decryption
    text := Decrypt(cypher, key)
	
	
    fmt.Println("Original message:", string(msg.Bytes()))
    fmt.Println("Encrypted message:", cypher)
    fmt.Println("Decrypted message:", string(text.Bytes()))