java.lang.Object | |
↳ | javax.crypto.KeyAgreement |
This class provides the functionality for a key exchange protocol. This enables two or more parties to agree on a secret key for symmetric cryptography.
Protected Constructors | |||||||||||
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Creates a new
KeyAgreement
instance.
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Public Methods | |||||||||||
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Does the next (or the last) phase of the key agreement, using the
specified key.
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Generates the shared secret.
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Generates the shared secret and stores it into the buffer
sharedSecred
at
offset
.
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Generates the shared secret.
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Returns the name of the key agreement algorithm.
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Creates a new
KeyAgreement
for the specified algorithm from the
specified provider.
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Create a new
KeyAgreement
for the specified algorithm from the
specified provider.
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Creates a new
KeyAgreement
for the specified algorithm.
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Returns the provider for this
KeyAgreement
instance.
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Initializes this
KeyAgreement
with the specified key and the
specified randomness source.
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Initializes this
KeyAgreement
with the specified key and the
algorithm parameters.
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Initializes this
KeyAgreement
with the specified key, algorithm
parameters and randomness source.
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Initializes this
KeyAgreement
with the specified key.
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[Expand]
Inherited Methods
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From class
java.lang.Object
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Creates a new
KeyAgreement
instance.
keyAgreeSpi | the SPI delegate. |
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provider | the provider providing this KeyAgreement. |
algorithm | the name of the key agreement algorithm. |
Does the next (or the last) phase of the key agreement, using the specified key.
key | the key received from the other party for this phase. |
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lastPhase |
set to
true
if this is the last phase of this key
agreement.
|
null
if there is
no intermediate key for this phase.
InvalidKeyException | if the specified key cannot be used in this key agreement or this phase, |
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IllegalStateException | if this instance has not been initialized. |
Generates the shared secret.
algorithm |
the algorithm to for the
SecretKey
|
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SecretKey
of the specified
algorithm.
IllegalStateException | if this key agreement is not complete. |
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NoSuchAlgorithmException | if the specified algorithm for the secret key does not exists. |
InvalidKeyException |
if a
SecretKey
with the specified algorithm cannot be
created using the generated shared secret.
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Generates the shared secret and stores it into the buffer
sharedSecred
at
offset
.
sharedSecret | the buffer to store the shared secret. |
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offset | the offset in the buffer. |
IllegalStateException | if this key agreement is not complete. |
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ShortBufferException | if the specified buffer is too small for the shared secret. |
Generates the shared secret.
IllegalStateException | if this key agreement is not complete. |
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Returns the name of the key agreement algorithm.
Creates a new
KeyAgreement
for the specified algorithm from the
specified provider.
algorithm | the name of the key agreement algorithm to create. |
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provider | the name of the provider that provides the requested algorithm. |
NoSuchAlgorithmException | if the specified provider cannot provide the requested algorithm. |
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NoSuchProviderException | if the specified provider does not exist. |
IllegalArgumentException |
if the specified provider name is
null
or empty.
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Create a new
KeyAgreement
for the specified algorithm from the
specified provider.
algorithm | the name of the key agreement algorithm to create. |
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provider | the provider that provides the requested algorithm. |
NoSuchAlgorithmException | if the specified provider cannot provide the requested algorithm. |
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IllegalArgumentException |
if the specified provider is
null
.
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NullPointerException |
if the specified algorithm name is
null
.
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Creates a new
KeyAgreement
for the specified algorithm.
algorithm | the name of the key agreement algorithm to create. |
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NoSuchAlgorithmException | if no installed provider can provide the requested algorithm. |
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NullPointerException |
if the specified algorithm is
null
.
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Returns the provider for this
KeyAgreement
instance.
KeyAgreement
instance.
Initializes this
KeyAgreement
with the specified key and the
specified randomness source.
key | the key to initialize this key agreement. |
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random | the source for any randomness needed. |
InvalidKeyException | if the specified key cannot be used to initialize this key agreement. |
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Initializes this
KeyAgreement
with the specified key and the
algorithm parameters.
key | the key to initialize this key agreement. |
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params | the parameters for this key agreement algorithm. |
InvalidKeyException | if the specified key cannot be used to initialize this key agreement. |
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InvalidAlgorithmParameterException | if the specified parameters are invalid for this key agreement algorithm. |
Initializes this
KeyAgreement
with the specified key, algorithm
parameters and randomness source.
key | the key to initialize this key agreement. |
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params | the parameters for this key agreement algorithm. |
random | the source for any randomness needed. |
InvalidKeyException | if the specified key cannot be used to initialize this key agreement. |
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InvalidAlgorithmParameterException | if the specified parameters are invalid for this key agreement algorithm. |
Initializes this
KeyAgreement
with the specified key.
key | the key to initialize this key agreement. |
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InvalidKeyException | if the specified key cannot be used to initialize this key agreement. |
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