gnu.java.security.provider
Class RSA
- Cloneable
public abstract class RSA
Object | clone() - Returns a clone if the implementation is cloneable.
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protected Object | engineGetParameter(String param)
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protected void | engineInitSign(PrivateKey privateKey) - Initializes this signature object with the specified private key for
signing operations.
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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.
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protected void | engineInitVerify(PublicKey publicKey) - Initializes this signature object with the specified public key for
verification operations.
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protected void | engineSetParameter(String param, Object value) - Replaced by engineSetParameter(AlgorithmParameterSpec).
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protected byte[] | engineSign() - Returns the signature bytes of all the data updated so far.
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protected int | engineSign(byte[] out, int off, int len) - Finishes this signature operation and stores the resulting signature
bytes in the provided buffer
outbuf , starting at offset
.
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protected void | engineUpdate(byte b) - Updates the data to be signed or verified using the specified byte.
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protected void | engineUpdate(byte[] buf, int off, int len) - Updates the data to be signed or verified, using the specified array of
bytes, starting at the specified offset.
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protected boolean | engineVerify(byte[] sig) - Verifies the passed-in signature.
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protected boolean | engineVerify(byte[] sig, int off, int len) - Verifies the passed-in
signature in the specified array of
bytes, starting at the specified offset .
Note: Subclasses should overwrite the default implementation.
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clone , engineGetParameter , engineGetParameters , engineInitSign , engineInitSign , engineInitVerify , engineSetParameter , engineSetParameter , engineSign , engineSign , engineUpdate , engineUpdate , engineVerify , engineVerify |
clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait |
DIGEST_ALGORITHM
protected static final OID DIGEST_ALGORITHM
digestAlgorithm OBJECT IDENTIFIER ::=
{ iso(1) member-body(2) US(840) rsadsi(113549) digestAlgorithm(2) }
engineGetParameter
protected Object engineGetParameter(String param)
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.
- engineGetParameter in interface SignatureSpi
param
- the string name of the parameter.
- the object that represents the parameter value, or
null
if there is none.
InvalidParameterException
- if param
is an invalid
parameter for this engine, or another exception occurs while trying to get
this parameter.
engineInitSign
protected void engineInitSign(PrivateKey privateKey,
SecureRandom random)
throws InvalidKeyException
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.)
- engineInitSign in interface SignatureSpi
privateKey
- the private key of the identity whose signature will be
generated.random
- the source of randomness.
engineSetParameter
protected void engineSetParameter(String param,
Object value)
Replaced by engineSetParameter(AlgorithmParameterSpec).
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.
- engineSetParameter in interface SignatureSpi
param
- the string identifier of the parameter.value
- the parameter value.
InvalidParameterException
- if param
is an invalid
parameter for this signature algorithm engine, the parameter is already set
and cannot be set again, a security exception occurs, and so on.
engineSign
protected byte[] engineSign()
throws SignatureException
Returns the signature bytes of all the data updated so far. The format of
the signature depends on the underlying signature scheme.
- engineSign in interface SignatureSpi
- the signature bytes of the signing operation's result.
engineSign
protected int engineSign(byte[] out,
int off,
int len)
throws SignatureException
Finishes this signature operation and stores the resulting signature
bytes in the provided buffer
outbuf
, starting at
offset
. The format of the signature depends on the underlying signature
scheme.
The signature implementation is reset to its initial state (the state it
was in after a call to one of the
engineInitSign()
methods)
and can be reused to generate further signatures with the same private key.
This method should be abstract, but we leave it concrete for binary
compatibility. Knowledgeable providers should override this method.
- engineSign in interface SignatureSpi
len
- number of bytes within outbuf allotted for the signature. Both
this default implementation and the GNU provider do not return
partial digests. If the value of this parameter is less than the actual
signature length, this method will throw a SignatureException
. This
parameter is ignored if its value is greater than or equal to the actual
signature length.
- the number of bytes placed into
outbuf
.
engineUpdate
protected void engineUpdate(byte[] buf,
int off,
int len)
throws SignatureException
Updates the data to be signed or verified, using the specified array of
bytes, starting at the specified offset.
- engineUpdate in interface SignatureSpi
off
- the offset to start from in the array of bytes.len
- the number of bytes to use, starting at offset.
engineVerify
protected boolean engineVerify(byte[] sig,
int off,
int len)
throws SignatureException
Verifies the passed-in
signature
in the specified array of
bytes, starting at the specified
offset
.
Note: Subclasses should overwrite the default implementation.
- engineVerify in interface SignatureSpi
true
if the signature was verified, false
if not.
SignatureException
- if the engine is not initialized properly, or
the passed-in signature
is improperly encoded or of the wrong
type, etc.
RSA.java -- RSA PKCS#1 signatures.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of GNU Classpath.
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it under the terms of the GNU General Public License as published by
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