@NonNullByDefault

Package java.security.spec

Provides classes and interfaces for key specifications and algorithm parameter specifications.

A key specification is a transparent representation of the key material that constitutes a key. A key may be specified in an algorithm-specific way, or in an algorithm-independent encoding format (such as ASN.1). This package contains key specifications for DSA public and private keys, RSA public and private keys, PKCS #8 private keys in DER-encoded format, and X.509 public and private keys in DER-encoded format.

An algorithm parameter specification is a transparent representation of the sets of parameters used with an algorithm. This package contains an algorithm parameter specification for parameters used with the DSA algorithm.

Package Specification

• PKCS #1: RSA Cryptography Specifications, Version 2.2 (RFC 8017)
• PKCS #8: Private-Key Information Syntax Standard, Version 1.2, November 1993
• Federal Information Processing Standards Publication (FIPS PUB) 186: Digital Signature Standard (DSS)

Related Documentation

For documentation that includes information about algorithm parameter and key specifications, please see:

• Java™ Cryptography Architecture API Specification and Reference
• How to Implement a Provider for the Java™ Cryptography Architecture

Interface Summary

Interface	Description
AlgorithmParameterSpec	A (transparent) specification of cryptographic parameters.
KeySpec	A (transparent) specification of the key material that constitutes a cryptographic key.

Class Summary

Class	Description
ECGenParameterSpec	This immutable class specifies the set of parameters used for generating elliptic curve (EC) domain parameters.
EncodedKeySpec	This class represents a public or private key in encoded format.
MGF1ParameterSpec	This class specifies the set of parameters used with mask generation function MGF1 in OAEP Padding and RSASSA-PSS signature scheme, as defined in the PKCS#1 v2.2 standard.
PKCS8EncodedKeySpec	This class represents the ASN.1 encoding of a private key, encoded according to the ASN.1 type PrivateKeyInfo.
RSAKeyGenParameterSpec	This class specifies the set of parameters used to generate an RSA key pair.
X509EncodedKeySpec	This class represents the ASN.1 encoding of a public key, encoded according to the ASN.1 type SubjectPublicKeyInfo.

Exception Summary

Exception	Description
InvalidKeySpecException	This is the exception for invalid key specifications.
InvalidParameterSpecException	This is the exception for invalid parameter specifications.