CryptoHelper

Ecng.Security

Crypto helper.

Methods

public static Secret CreatePasswordSecret(string password, byte[] salt)

result = CryptoHelper.CreatePasswordSecret(password, salt)

Creates a password Secret using PBKDF2 (slow, salted key stretching) — the recommended way to store passwords, unlike the fast single-pass CryptoAlgorithm).

password: The plain-text password.
salt: Optional salt; a random one is generated when omitted.

Returns: Secret whose Hash is the PBKDF2 derivation.

CreateSecret

public static Secret CreateSecret(string plainText, byte[] salt, CryptoAlgorithm algo)

result = CryptoHelper.CreateSecret(plainText, salt, algo)

Creates a new Secret from the plain text.

plainText: The plain text.
salt: The salt.
algo: The hash algorithm.

Returns: Secret

CreateSecret

public static Secret CreateSecret(string plainText, Secret secret, CryptoAlgorithm algo)

result = CryptoHelper.CreateSecret(plainText, secret, algo)

Creates a new Secret from the plain text.

plainText: The plain text.
secret: Secret
algo: The hash algorithm.

Returns: Secret

CreateSecret

public static Secret CreateSecret(string plainText, CryptoAlgorithm algo)

result = CryptoHelper.CreateSecret(plainText, algo)

Creates a new Secret from the plain text.

plainText: The plain text.
algo: The hash algorithm.

Returns: Secret

CreateSecret

public static Secret CreateSecret(SecureString plainText, CryptoAlgorithm algo)

result = CryptoHelper.CreateSecret(plainText, algo)

Creates a new Secret from the plain text.

plainText: The plain text.
algo: The hash algorithm.

Returns: Secret

Decrypt

public static byte[] Decrypt(byte[] cipherText, string passPhrase, byte[] salt, byte[] iv)

result = CryptoHelper.Decrypt(cipherText, passPhrase, salt, iv)

Decrypts the cipher text.

cipherText: The cipher text.
passPhrase: The pass phrase.
salt: The salt.
iv: The iv.

Returns: The decrypted bytes.

DecryptAes

public static byte[] DecryptAes(byte[] cipherText, string passPhrase, byte[] salt, byte[] iv)

result = CryptoHelper.DecryptAes(cipherText, passPhrase, salt, iv)

Decrypts the cipher text.

cipherText: The cipher text.
passPhrase: The pass phrase.
salt: The salt.
iv: The iv.

Returns: The plain text.

Encrypt

public static byte[] Encrypt(byte[] plain, string passPhrase, byte[] salt, byte[] iv)

result = CryptoHelper.Encrypt(plain, passPhrase, salt, iv)

Encrypts the plain text.

plain: The plain text.
passPhrase: The pass phrase.
salt: The salt.
iv: The iv.

Returns: The encrypted bytes.

EncryptAes

public static byte[] EncryptAes(byte[] plain, string passPhrase, byte[] salt, byte[] iv)

result = CryptoHelper.EncryptAes(plain, passPhrase, salt, iv)

Encrypts the plain text.

plain: The plain text.
passPhrase: The pass phrase.
salt: The salt.
iv: The iv.

Returns: The cipher text.

FromRsa

public static byte[] FromRsa(RSAParameters param)

result = CryptoHelper.FromRsa(param)

Converts the RSAParameters to a byte array.

param: RSAParameters

Returns: Byte array.

GenerateRsa

public static RSAParameters GenerateRsa()

result = CryptoHelper.GenerateRsa()

Returns a new generated RSAParameters class which will be used as a key for the signature. It will generate a PRIVATE key (which includes the PUBLIC key).

IsPasswordValid

public static bool IsPasswordValid(Secret secret, string password)

result = CryptoHelper.IsPasswordValid(secret, password)

Validates a password against a PBKDF2 Secret created by Byte[]), in constant time.

secret: Secret.
password: The password to check.

Returns: if the password matches.

IsValid

public static bool IsValid(Secret secret, string password, CryptoAlgorithm algo)

result = CryptoHelper.IsValid(secret, password, algo)

Validates the password.

secret: Secret
password: The password to check.
algo: The hash algorithm.

Returns: Operation result.

IsValid

public static bool IsValid(Secret secret, SecureString password, CryptoAlgorithm algo)

result = CryptoHelper.IsValid(secret, password, algo)

Validates the password.

secret: Secret
password: The password to check.
algo: The hash algorithm.

Returns: Operation result.

Md5

public static string Md5(byte[] value)

result = CryptoHelper.Md5(value)

MD5 hash.

value: The value to hash.

Returns: The hash.

PublicPart

public static RSAParameters PublicPart(RSAParameters param)

result = CryptoHelper.PublicPart(param)

Returns the public part of the RSAParameters.

param: RSAParameters

Returns: The public part of the RSAParameters.

Sha256

public static string Sha256(byte[] value)

result = CryptoHelper.Sha256(value)

SHA256 hash.

value: The value to hash.

Returns: The hash.

Sha512

public static string Sha512(byte[] value)

result = CryptoHelper.Sha512(value)

SHA512 hash.

value: The value to hash.

Returns: The hash.

ToRsa

public static RSAParameters ToRsa(byte[] key)

result = CryptoHelper.ToRsa(key)

Converts the byte array to RSAParameters.

key: Byte array.

Returns: RSAParameters

Fields

DefaultSaltSize

public const int DefaultSaltSize

value = CryptoHelper.DefaultSaltSize

The default salt size.

PasswordIterations

public const int PasswordIterations

value = CryptoHelper.PasswordIterations

Number of PBKDF2 iterations used to hash passwords (key stretching).