AsymmetricDecrypt

PowerScript function

Description

Decrypts a blob value with asymmetric algorithm.

Applies to

CrypterObject objects

Syntax

crypter.AsymmetricDecrypt ( algorithm, variable, privKey)

1	crypter.AsymmetricDecrypt ( algorithm, variable, privKey)

Argument	Description
crypter	The name of the CrypterObject object
algorithm	A value of the AsymmetricAlgorithm enumerated type that specifies the type of asymmetric algorithm. Values are: RSA! – The Rivest-Shamir-Adleman cryptopsystem Rabin! – The Rabin Algorithm Note: DSA! is designed to be used in signature, not in encryption and decryption.
variable	A blob whose value is the data you want to decrypt with Public-Key cipher. When using the system blob function to convert a string to a blob, it is recommended to specify its encoding argument to be EncodingANSI! (for English characters only) or EncodingUTF8!, otherwise, the default EncodingUTF16LE! will be used.
privKey	A blob specifying the private key. The private key format must be PKCS#8.

Return value

Blob. Returns the result of the decrypt if it succeeds. If any
argument’s value is null, the method returns null. If an error occurs,
throw the exception.

Examples

This statement encrypts the data using RSA and then returns the
encrypted data.

Blob lblb_data
Blob lblb_privKey
Blob lblb_pubKey
Blob lblb_encrypt
Blob lblb_decrypt

lblb_data = Blob("Test Rsa", EncodingANSI!)

CrypterObject lnv_CrypterObject
lnv_CrypterObject = Create CrypterObject

// Generate the private key
lnv_CrypterObject.AsymmetricGenerateKey(RSA!, 1024, lblb_privKey, lblb_pubKey)

// Encrypt data using RSA
lblb_encrypt = lnv_CrypterObject.AsymmetricEncrypt(RSA!, lblb_data, lblb_pubKey)

// Decrypt data using RSA
lblb_decrypt = lnv_CrypterObject.AsymmetricDecrypt(RSA!, lblb_encrypt, lblb_privKey)

messagebox("AsymmetricDecrypt", string(lblb_decrypt, EncodingANSI!))