Throws: SignatureException - if this signature object is not Returns: true if the signature was verified, false if not. ![]() length - the number of bytes to use, starting at offset. offset - the offset to start from in the array of bytes. Parameters: signature - the signature bytes to be verified. Whose public key was specified in the call to initVerify. Reset and available to verify another signature from the identity It was in when previously initialized for verification via aĬall to initVerify(PublicKey). Of bytes, starting at the specified offset.Ī call to this method resets this signature object to the state Verifies the passed-in signature in the specified array Registered in the security provider list NullPointerException - if algorithm is null See Also: Implementation for the specified algorithm is notĪvailable from the specified provider NoSuchProviderException - if the specified provider is not Or empty NoSuchAlgorithmException - if a SignatureSpi Returns: the new Signature object Throws: IllegalArgumentException - if the provider name is null Parameters: algorithm - the name of the algorithm requested.įor information about standard algorithm names. The specified provider must be registered SignatureSpi implementation from the specified provider Specified algorithm NullPointerException - if algorithm is null See Also: Returns: the new Signature object Throws: NoSuchAlgorithmException - if no Provider supports a Java Security Standard Algorithm Names Specificationįor information about standard algorithm names. Parameters: algorithm - the standard name of the algorithm requested. May be different than the order of providers returned by The preferred provider order for the specified algorithm. Implementation Note: The JDK Reference Implementation additionally uses the Note that the list of registered providers may be retrieved via Provider that supports the specified algorithm is returned. SignatureSpi implementation from the first Starting with the most preferred Provider. This method traverses the list of registered security Providers, Returns a Signature object that implements the specified signature ![]() Java Security Standard Algorithm Names Specification.Ĭonsult the release documentation for your implementation to see if any Supply their own implementations of digital signature algorithms.Įvery implementation of the Java platform is required to support the The superclass are intended for cryptographic service providers who wish to Note that this class is abstract and extends fromĪpplication developers should only take notice of the methods defined in Signing or Verifying a signature on all updated bytes.Which initializes the signature for signingĭepending on the type of initialization, this will update the a private key (and optionally a Secure Random Number Generator),. ![]() a public key, which initializes the signature for.There are three phases to the use of a Signature object forĮither signing data or verifying a signature: The algorithm name must be specified, as there is no default.Ī Signature object can be used to generate and verify digital In the case of RSA the signing algorithm could be specified as, for example, SHA-256 message digest algorithm can be specified as SHA256withDSA. The signature algorithm can be, among others, the NIST standardĭSA, using DSA and SHA-256. Digital signatures are used forĪuthentication and integrity assurance of digital data. The Signature class is used to provide applications the functionality
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |