| java.lang.Object | ||
| ↳ | java.security.SignatureSpi | |
| ↳ | sun.security.rsa.RSASignature | |
 Known Direct Subclasses
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Class Overview
PKCS#1 RSA signatures with the various message digest algorithms. This file contains an abstract base class with all the logic plus a nested static class for each of the message digest algorithms (see end of the file). We support MD2, MD5, SHA-1, SHA-256, SHA-384, and SHA-512.
Summary
| Nested Classes | |||||||||||
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| RSASignature.MD2withRSA | |||||||||||
| RSASignature.MD5withRSA | |||||||||||
| RSASignature.SHA1withRSA | |||||||||||
| RSASignature.SHA256withRSA | |||||||||||
| RSASignature.SHA384withRSA | |||||||||||
| RSASignature.SHA512withRSA | |||||||||||
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[Expand]
Inherited Fields | |||||||||||
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From class
java.security.SignatureSpi
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| Public Methods | |||||||||||
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Decode the signature data.
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Encode the digest, return the to-be-signed data.
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| Protected Methods | |||||||||||
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This method is deprecated.
No replacement.
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Initializes this signature object with the specified
private key and source of randomness for signing operations.
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Initializes this signature object with the specified
private key for signing operations.
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Initializes this signature object with the specified
public key for verification operations.
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This method is deprecated.
Replaced by
engineSetParameter.
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Returns the signature bytes of all the data
updated so far.
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Updates the data to be signed or verified, using the
specified array of bytes, starting at the specified offset.
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Updates the data to be signed or verified
using the specified byte.
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Updates the data to be signed or verified using the specified
ByteBuffer.
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Verifies the passed-in signature.
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[Expand]
Inherited Methods | |||||||||||
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From class
java.security.SignatureSpi
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From class
java.lang.Object
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Public Methods
public static byte[] decodeSignature (ObjectIdentifier oid, byte[] signature)
Decode the signature data. Verify that the object identifier matches and return the message digest.
Throws
| IOException |
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public static byte[] encodeSignature (ObjectIdentifier oid, byte[] digest)
Encode the digest, return the to-be-signed data. Also used by the PKCS#11 provider.
Throws
| IOException |
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Protected Methods
protected Object engineGetParameter (String param)
This method is deprecated.
No replacement.
Gets the value of the specified algorithm parameter. This method supplies a general-purpose mechanism through which it is possible to get the various parameters of this object. A parameter may be any settable parameter for the algorithm, such as a parameter size, or a source of random bits for signature generation (if appropriate), or an indication of whether or not to perform a specific but optional computation. A uniform algorithm-specific naming scheme for each parameter is desirable but left unspecified at this time.
Parameters
| param | the string name of the parameter. |
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Returns
- the object that represents the parameter value, or null if there is none.
Throws
| InvalidParameterException |
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protected void engineInitSign (PrivateKey privateKey, SecureRandom random)
Initializes this signature object with the specified private key and source of randomness for signing operations.
This concrete method has been added to this previously-defined abstract class. (For backwards compatibility, it cannot be abstract.)
Parameters
| privateKey | the private key of the identity whose signature will be generated. |
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| random | the source of randomness |
Throws
| InvalidKeyException |
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protected void engineInitSign (PrivateKey privateKey)
Initializes this signature object with the specified private key for signing operations.
Parameters
| privateKey | the private key of the identity whose signature will be generated. |
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Throws
| InvalidKeyException |
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protected void engineInitVerify (PublicKey publicKey)
Initializes this signature object with the specified public key for verification operations.
Parameters
| publicKey | the public key of the identity whose signature is going to be verified. |
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Throws
| InvalidKeyException |
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protected void engineSetParameter (String param, Object value)
This method is deprecated.
Replaced by engineSetParameter.
Sets the specified algorithm parameter to the specified value. This method supplies a general-purpose mechanism through which it is possible to set the various parameters of this object. A parameter may be any settable parameter for the algorithm, such as a parameter size, or a source of random bits for signature generation (if appropriate), or an indication of whether or not to perform a specific but optional computation. A uniform algorithm-specific naming scheme for each parameter is desirable but left unspecified at this time.
Parameters
| param | the string identifier of the parameter. |
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| value | the parameter value. |
Throws
| InvalidParameterException |
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protected byte[] engineSign ()
Returns the signature bytes of all the data updated so far. The format of the signature depends on the underlying signature scheme.
Returns
- the signature bytes of the signing operation's result.
Throws
| SignatureException |
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protected void engineUpdate (byte[] b, int off, int len)
Updates the data to be signed or verified, using the specified array of bytes, starting at the specified offset.
Parameters
| b | the array of bytes |
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| off | the offset to start from in the array of bytes |
| len | the number of bytes to use, starting at offset |
Throws
| SignatureException |
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protected void engineUpdate (byte b)
Updates the data to be signed or verified using the specified byte.
Parameters
| b | the byte to use for the update. |
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Throws
| SignatureException |
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protected void engineUpdate (ByteBuffer b)
Updates the data to be signed or verified using the specified
ByteBuffer. Processes the data.remaining() bytes
starting at at data.position().
Upon return, the buffer's position will be equal to its limit;
its limit will not have changed.
Parameters
| b | the ByteBuffer |
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protected boolean engineVerify (byte[] sigBytes)
Verifies the passed-in signature.
Parameters
| sigBytes | the signature bytes to be verified. |
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Returns
- true if the signature was verified, false if not.
Throws
| SignatureException |
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