class Nanvault::Crypto

• Nanvault::Crypto
• Reference
• Object

Overview

Crypto class

Defined in:

nanvault.cr

Constant Summary

AES_BLOCK_SIZE = 16

CIPHER_ALG_DEFAULT = "aes-256-ctr"

HMAC_ALG = OpenSSL::Algorithm::SHA256

MAX_CHAR = 126

MIN_CHAR = 33

password generation constants alphabet is made up of chars corresponding to ints between these values

PBKDF2_ALG = OpenSSL::Algorithm::SHA256

PBKDF2_ITERATIONS = 10000

PBKDF2_KEY_SIZE = 80

Class Method Summary

• .check_hmac(data, key, exp_hmac)

  class method to check HMAC

• .decrypt(cipher_iv, cipher_key, ciphertext, algorithm = CIPHER_ALG_DEFAULT)

  class method to decrypt ciphertext

• .encrypt(cipher_iv, cipher_key, plaintext, algorithm = CIPHER_ALG_DEFAULT)

  class method to encrypt plaintext

• .genpass

  class method to generate a random, safe password

• .get_keys_iv(salt, password)

  class method to get cipher key, HMAC key and cipher IV

Macro Summary

• get_safe_pass_len(n)

  get safe password length macro calculates password length to get at least n bit security NOTE: the "-1" is there because Random::Secure.rand(k) returns numbers from 0 to k-1

Class Method Detail

Macro Detail