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java.lang.Objectnet.rim.device.api.crypto.PKCS1SignatureVerifier
public final class PKCS1SignatureVerifier
The PKCS1SignatureVerifier class can verify an RSA PKCS#1 signature.
We implemented the PKCS1 verification as per the PKCS #1 version 2.1 document.
For a code sample using the PKCS1 signature verifier, click here.
PKCS1SignatureSigner| Constructor Summary | ||
|---|---|---|
|
PKCS1SignatureVerifier(RSAPublicKey key,
byte[] signature,
int signatureOffset)
Constructs an RSA PKCS1SignatureVerifier object which uses the SHA-1 digest. |
|
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PKCS1SignatureVerifier(RSAPublicKey key,
Digest digest,
byte[] signature,
int signatureOffset)
Constructs an RSA PKCS1SignatureVerifier object which uses the given digest. |
|
| Method Summary | ||
|---|---|---|
|
String |
getAlgorithm()
Returns the name of the signing algorithm used ("RSA_PKCS1_(V15 or V20)/" + digest algorithm name). |
|
void |
update(byte[] data)
Adds additional message data to the signature. |
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void |
update(byte[] data,
int offset,
int length)
Adds additional message data to the signature. |
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void |
update(int data)
Adds additional message data to the signature. |
|
boolean |
verify()
Returns true if the signature is valid, false otherwise. |
| Methods inherited from class java.lang.Object |
|---|
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public PKCS1SignatureVerifier(RSAPublicKey key,
byte[] signature,
int signatureOffset)
throws InvalidSignatureEncodingException,
CryptoTokenException,
CryptoUnsupportedOperationException
PKCS1SignatureVerifier object which uses the SHA-1 digest.
key - The public key used to verify the signature.signature - The signature to be verified.signatureOffset - The offset, or the start position, of the
signature data within the array.
InvalidSignatureEncodingException
CryptoTokenException
CryptoUnsupportedOperationException
public PKCS1SignatureVerifier(RSAPublicKey key,
Digest digest,
byte[] signature,
int signatureOffset)
throws InvalidSignatureEncodingException,
CryptoTokenException,
CryptoUnsupportedOperationException
PKCS1SignatureVerifier object which uses the given digest.
key - The public key used to verify the signature.digest - The digest used to process the message.signature - The signature to be verified.signatureOffset - The offset, or start position, of the signature
data within the array.
InvalidSignatureEncodingException
CryptoTokenException
CryptoUnsupportedOperationException| Method Detail |
|---|
public String getAlgorithm()
getAlgorithm in interface SignatureVerifierpublic void update(int data)
SignatureVerifier
update in interface SignatureVerifierdata - The byte to be hashed.public void update(byte[] data)
SignatureVerifier
update in interface SignatureVerifierdata - A byte array containing the message data to hash.
public void update(byte[] data,
int offset,
int length)
SignatureVerifier
update in interface SignatureVerifierdata - The message data to hash.offset - The offset, or initial position to start reading in the data.length - The amount of data to read.
public boolean verify()
throws CryptoTokenException,
CryptoUnsupportedOperationException
SignatureVerifier
verify in interface SignatureVerifierCryptoTokenException - Thrown when a problem occurs with a crypto
token or the crypto token is invalid.
CryptoUnsupportedOperationException - Thrown when a call is made to
an unsupported operation.
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