SigUtil (I2P Anonymous Network - Java Documentation

java.lang.Object
- net.i2p.crypto.SigUtil

```
public final class SigUtil
extends java.lang.Object
```
Utilities for Signing keys and Signatures

導入されたバージョン:

0.9.9, public since 0.9.12

メソッドの概要

すべてのメソッド staticメソッド concreteメソッド推奨されていないメソッド
修飾子とタイプ	メソッド	説明
`static NativeBigInteger[]`	`aSN1ToBigInteger(byte[] asn, int len)`	See above.
`static void`	`clearCaches()`
`(package private) static byte[]`	`combine(java.math.BigInteger x, java.math.BigInteger y, int len)`	Combine two BigIntegers of nominal length = len / 2
`static SigningPrivateKey`	`fromJavaKey(java.security.interfaces.DSAPrivateKey pk)`
`static SigningPublicKey`	`fromJavaKey(java.security.interfaces.DSAPublicKey pk)`
`static SigningPrivateKey`	`fromJavaKey(java.security.interfaces.ECPrivateKey pk, SigType type)`
`static SigningPublicKey`	`fromJavaKey(java.security.interfaces.ECPublicKey pk, SigType type)`
`static SigningPrivateKey`	`fromJavaKey(java.security.interfaces.RSAPrivateKey pk, SigType type)`	As of 0.9.31, if pk is a RSAPrivateCrtKey, this will return a RSASigningPrivateCrtKey.
`static SigningPublicKey`	`fromJavaKey(java.security.interfaces.RSAPublicKey pk, SigType type)`
`static SigningPrivateKey`	`fromJavaKey(java.security.PrivateKey pk)`	Use if SigType is unknown.
`static SigningPrivateKey`	`fromJavaKey(java.security.PrivateKey pk, SigType type)`	Use if SigType is known.
`static SigningPublicKey`	`fromJavaKey(java.security.PublicKey pk)`	Use if SigType is unknown.
`static SigningPublicKey`	`fromJavaKey(java.security.PublicKey pk, SigType type)`	Use if SigType is known.
`static SigningPrivateKey`	`fromJavaKey(EdDSAPrivateKey pk, SigType type)`
`static SigningPublicKey`	`fromJavaKey(EdDSAPublicKey pk, SigType type)`
`static Signature`	`fromJavaSig(byte[] asn, SigType type)`
`static java.security.PrivateKey`	`importJavaPrivateKey(java.io.File file, SigType type)`
`static java.security.PublicKey`	`importJavaPublicKey(java.io.File file, SigType type)`
`static int`	`intToASN1(byte[] d, int idx, int val)`	Output an length or integer value in ASN.1 Does NOT output the tag e.g.
`static byte[]`	`rectify(java.math.BigInteger bi, int len)`
`static byte[]`	`sigBytesToASN1(java.math.BigInteger r, java.math.BigInteger s)`	http://download.oracle.com/javase/1.5.0/docs/guide/security/CryptoSpec.html
`static java.security.interfaces.DSAPrivateKey`	`toJavaDSAKey(SigningPrivateKey pk)`
`static java.security.interfaces.DSAPublicKey`	`toJavaDSAKey(SigningPublicKey pk)`
`static java.security.interfaces.ECPrivateKey`	`toJavaECKey(SigningPrivateKey pk)`
`static java.security.interfaces.ECPublicKey`	`toJavaECKey(SigningPublicKey pk)`
`static EdDSAPrivateKey`	`toJavaEdDSAKey(SigningPrivateKey pk)`
`static EdDSAPublicKey`	`toJavaEdDSAKey(SigningPublicKey pk)`
`static java.security.PrivateKey`	`toJavaKey(SigningPrivateKey pk)`
`static java.security.PublicKey`	`toJavaKey(SigningPublicKey pk)`
`static java.security.interfaces.RSAPrivateKey`	`toJavaRSAKey(SigningPrivateKey pk)`	As of 0.9.31, if pk is a RSASigningPrivateCrtKey, this will return a RSAPrivateCrtKey.
`static java.security.interfaces.RSAPublicKey`	`toJavaRSAKey(SigningPublicKey pk)`	推奨されていません。 unused
`static byte[]`	`toJavaSig(Signature sig)`

クラスから継承されたメソッド java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

メソッドの詳細

toJavaKey

public static java.security.PublicKey toJavaKey(SigningPublicKey pk)
                                         throws java.security.GeneralSecurityException

戻り値:: JAVA key!
例外:: java.security.GeneralSecurityException

toJavaKey

public static java.security.PrivateKey toJavaKey(SigningPrivateKey pk)
                                          throws java.security.GeneralSecurityException

戻り値:: JAVA key!
例外:: java.security.GeneralSecurityException

fromJavaKey
```
public static SigningPublicKey fromJavaKey(java.security.PublicKey pk)
                                    throws java.security.GeneralSecurityException
```
Use if SigType is unknown. For efficiency, use fromJavakey(pk, type) if type is known.

パラメータ:

pk - JAVA key!

例外:

java.lang.IllegalArgumentException - on unknown type

java.security.GeneralSecurityException

導入されたバージョン:

0.9.18

fromJavaKey

public static SigningPublicKey fromJavaKey(java.security.PublicKey pk,
                                           SigType type)
                                    throws java.security.GeneralSecurityException

Use if SigType is known.

パラメータ:: pk - JAVA key!
例外:: java.security.GeneralSecurityException

fromJavaKey
```
public static SigningPrivateKey fromJavaKey(java.security.PrivateKey pk)
                                     throws java.security.GeneralSecurityException
```
Use if SigType is unknown. For efficiency, use fromJavakey(pk, type) if type is known.

パラメータ:

pk - JAVA key!

例外:

java.lang.IllegalArgumentException - on unknown type

java.security.GeneralSecurityException

導入されたバージョン:

0.9.18

fromJavaKey

public static SigningPrivateKey fromJavaKey(java.security.PrivateKey pk,
                                            SigType type)
                                     throws java.security.GeneralSecurityException

Use if SigType is known.

パラメータ:: pk - JAVA key!
例外:: java.security.GeneralSecurityException

toJavaECKey

public static java.security.interfaces.ECPublicKey toJavaECKey(SigningPublicKey pk)
                                                        throws java.security.GeneralSecurityException

戻り値:: JAVA key!
例外:: java.security.GeneralSecurityException

toJavaECKey

public static java.security.interfaces.ECPrivateKey toJavaECKey(SigningPrivateKey pk)
                                                         throws java.security.GeneralSecurityException

戻り値:: JAVA key!
例外:: java.security.GeneralSecurityException

fromJavaKey

public static SigningPublicKey fromJavaKey(java.security.interfaces.ECPublicKey pk,
                                           SigType type)
                                    throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

fromJavaKey

public static SigningPrivateKey fromJavaKey(java.security.interfaces.ECPrivateKey pk,
                                            SigType type)
                                     throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

toJavaEdDSAKey

public static EdDSAPublicKey toJavaEdDSAKey(SigningPublicKey pk)
                                     throws java.security.GeneralSecurityException

戻り値:: JAVA EdDSA public key!
例外:: java.security.GeneralSecurityException
導入されたバージョン:: 0.9.15

toJavaEdDSAKey

public static EdDSAPrivateKey toJavaEdDSAKey(SigningPrivateKey pk)
                                      throws java.security.GeneralSecurityException

戻り値:: JAVA EdDSA private key!
例外:: java.security.GeneralSecurityException
導入されたバージョン:: 0.9.15

fromJavaKey

public static SigningPublicKey fromJavaKey(EdDSAPublicKey pk,
                                           SigType type)
                                    throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException
導入されたバージョン:: 0.9.15

fromJavaKey

public static SigningPrivateKey fromJavaKey(EdDSAPrivateKey pk,
                                            SigType type)
                                     throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException
導入されたバージョン:: 0.9.15

toJavaDSAKey

public static java.security.interfaces.DSAPublicKey toJavaDSAKey(SigningPublicKey pk)
                                                          throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

toJavaDSAKey

public static java.security.interfaces.DSAPrivateKey toJavaDSAKey(SigningPrivateKey pk)
                                                           throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

fromJavaKey

public static SigningPublicKey fromJavaKey(java.security.interfaces.DSAPublicKey pk)
                                    throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

fromJavaKey

public static SigningPrivateKey fromJavaKey(java.security.interfaces.DSAPrivateKey pk)
                                     throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

toJavaRSAKey

public static java.security.interfaces.RSAPublicKey toJavaRSAKey(SigningPublicKey pk)
                                                          throws java.security.GeneralSecurityException

推奨されていません。 unused

例外:: java.security.GeneralSecurityException

toJavaRSAKey

public static java.security.interfaces.RSAPrivateKey toJavaRSAKey(SigningPrivateKey pk)
                                                           throws java.security.GeneralSecurityException

As of 0.9.31, if pk is a RSASigningPrivateCrtKey, this will return a RSAPrivateCrtKey.

例外:: java.security.GeneralSecurityException

fromJavaKey

public static SigningPublicKey fromJavaKey(java.security.interfaces.RSAPublicKey pk,
                                           SigType type)
                                    throws java.security.GeneralSecurityException

例外:: java.security.GeneralSecurityException

fromJavaKey

public static SigningPrivateKey fromJavaKey(java.security.interfaces.RSAPrivateKey pk,
                                            SigType type)
                                     throws java.security.GeneralSecurityException

As of 0.9.31, if pk is a RSAPrivateCrtKey, this will return a RSASigningPrivateCrtKey.

例外:: java.security.GeneralSecurityException

toJavaSig

public static byte[] toJavaSig(Signature sig)

戻り値:: ASN.1 representation

fromJavaSig

public static Signature fromJavaSig(byte[] asn,
                                    SigType type)
                             throws java.security.SignatureException

パラメータ:: asn - ASN.1 representation
戻り値:: a Signature with SigType type
例外:: java.security.SignatureException

importJavaPublicKey

public static java.security.PublicKey importJavaPublicKey(java.io.File file,
                                                          SigType type)
                                                   throws java.security.GeneralSecurityException,
                                                          java.io.IOException

戻り値:: JAVA key!
例外:: java.security.GeneralSecurityException; java.io.IOException

importJavaPrivateKey

public static java.security.PrivateKey importJavaPrivateKey(java.io.File file,
                                                            SigType type)
                                                     throws java.security.GeneralSecurityException,
                                                            java.io.IOException

戻り値:: JAVA key!
例外:: java.security.GeneralSecurityException; java.io.IOException

combine
```
static byte[] combine(java.math.BigInteger x,
                      java.math.BigInteger y,
                      int len)
               throws java.security.InvalidKeyException
```
Combine two BigIntegers of nominal length = len / 2

戻り値:

array of exactly len bytes

例外:

java.security.InvalidKeyException

導入されたバージョン:

0.9.9, package private since 0.9.31

rectify

public static byte[] rectify(java.math.BigInteger bi,
                             int len)
                      throws java.security.InvalidKeyException

パラメータ:: bi - non-negative
戻り値:: array of exactly len bytes
例外:: java.security.InvalidKeyException

sigBytesToASN1

public static byte[] sigBytesToASN1(java.math.BigInteger r,
                                    java.math.BigInteger s)

http://download.oracle.com/javase/1.5.0/docs/guide/security/CryptoSpec.html

  Signature Format: ASN.1 sequence of two INTEGER values: r and s, in that order:
                                SEQUENCE ::= { r INTEGER, s INTEGER }

  http://en.wikipedia.org/wiki/Abstract_Syntax_Notation_One
  30 -- tag indicating SEQUENCE
  xx - length in octets

  02 -- tag indicating INTEGER
  xx - length in octets
  xxxxxx - value

r and s are always non-negative. Only supports sigs up to about 65530 bytes. See code to fix BER encoding for this before you add a SigType with bigger signatures.

例外:: java.lang.IllegalArgumentException - if too big
導入されたバージョン:: 0.9.25, split out from sigBytesToASN1(byte[])

intToASN1
```
public static int intToASN1(byte[] d,
                            int idx,
                            int val)
```
Output an length or integer value in ASN.1 Does NOT output the tag e.g. 0x02 / 0x30

パラメータ:

val - 0-65535

戻り値:

the new index

導入されたバージョン:

0.9.25

aSN1ToBigInteger
```
public static NativeBigInteger[] aSN1ToBigInteger(byte[] asn,
                                                  int len)
                                           throws java.security.SignatureException
```
See above. Only supports sigs up to about 65530 bytes. See code to fix BER encoding for bigger than that.

パラメータ:

len - nominal length of each BigInteger

戻り値:

two BigIntegers

例外:

java.security.SignatureException

導入されたバージョン:

0.9.25

clearCaches
```
public static void clearCaches()
```

クラス SigUtil

メソッドの概要

クラスから継承されたメソッド java.lang.Object

メソッドの詳細

toJavaKey

toJavaKey

fromJavaKey

fromJavaKey

fromJavaKey

fromJavaKey

toJavaECKey

toJavaECKey

fromJavaKey

fromJavaKey

toJavaEdDSAKey

toJavaEdDSAKey

fromJavaKey

fromJavaKey

toJavaDSAKey

toJavaDSAKey

fromJavaKey

fromJavaKey

toJavaRSAKey

toJavaRSAKey

fromJavaKey

fromJavaKey

toJavaSig

fromJavaSig

importJavaPublicKey

importJavaPrivateKey

combine

rectify

sigBytesToASN1

intToASN1

aSN1ToBigInteger

clearCaches