Description
Verifies the signature of the data with asymmetric algorithm.
Applies to
CrypterObject objects
Syntax
crypter.AsymmetricVerifySign ( algorithm, variable, pubKey, sign)
|
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:
|
|
variable |
A blob whose value is the data you want to verify 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. |
|
pubKey |
A blob specifying the public key. |
|
sign |
A blob specifying the signature. |
Return value
Integer. Returns 1 if it succeeds and -1 if it failed. If any argument's value is null, the method returns null. If an error occurs, throw the exception.
Examples
This statement signs the data with RAS and validates the signature.
Blob lblb_data
Blob lblb_privKey
Blob lblb_pubKey
Blob lblb_signature
Integer li_isPass
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)
// Sign data with RSA
lblb_signature = lnv_CrypterObject.AsymmetricSign(RSA!, lblb_data, lblb_privKey)
// Validate the RSA signature
li_isPass = lnv_CrypterObject.AsymmetricVerifySign(RSA!, lblb_data, lblb_pubKey, lblb_signature)
if li_isPass = 1 then
messagebox("Success", "Verification succeeded!")
else
messagebox("Error", "Verification failed!")
end if
See also
