diff options
Diffstat (limited to 'libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/pkcs/RSAPrivateKey.java')
-rw-r--r-- | libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/pkcs/RSAPrivateKey.java | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/pkcs/RSAPrivateKey.java b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/pkcs/RSAPrivateKey.java new file mode 100644 index 000000000..28d7b9457 --- /dev/null +++ b/libraries/spongycastle/core/src/main/java/org/spongycastle/asn1/pkcs/RSAPrivateKey.java @@ -0,0 +1,187 @@ +package org.spongycastle.asn1.pkcs; + +import java.math.BigInteger; +import java.util.Enumeration; + +import org.spongycastle.asn1.ASN1EncodableVector; +import org.spongycastle.asn1.ASN1Integer; +import org.spongycastle.asn1.ASN1Object; +import org.spongycastle.asn1.ASN1Primitive; +import org.spongycastle.asn1.ASN1Sequence; +import org.spongycastle.asn1.ASN1TaggedObject; +import org.spongycastle.asn1.DERSequence; + +public class RSAPrivateKey + extends ASN1Object +{ + private BigInteger version; + private BigInteger modulus; + private BigInteger publicExponent; + private BigInteger privateExponent; + private BigInteger prime1; + private BigInteger prime2; + private BigInteger exponent1; + private BigInteger exponent2; + private BigInteger coefficient; + private ASN1Sequence otherPrimeInfos = null; + + public static RSAPrivateKey getInstance( + ASN1TaggedObject obj, + boolean explicit) + { + return getInstance(ASN1Sequence.getInstance(obj, explicit)); + } + + public static RSAPrivateKey getInstance( + Object obj) + { + if (obj instanceof RSAPrivateKey) + { + return (RSAPrivateKey)obj; + } + + if (obj != null) + { + return new RSAPrivateKey(ASN1Sequence.getInstance(obj)); + } + + return null; + } + + public RSAPrivateKey( + BigInteger modulus, + BigInteger publicExponent, + BigInteger privateExponent, + BigInteger prime1, + BigInteger prime2, + BigInteger exponent1, + BigInteger exponent2, + BigInteger coefficient) + { + this.version = BigInteger.valueOf(0); + this.modulus = modulus; + this.publicExponent = publicExponent; + this.privateExponent = privateExponent; + this.prime1 = prime1; + this.prime2 = prime2; + this.exponent1 = exponent1; + this.exponent2 = exponent2; + this.coefficient = coefficient; + } + + private RSAPrivateKey( + ASN1Sequence seq) + { + Enumeration e = seq.getObjects(); + + BigInteger v = ((ASN1Integer)e.nextElement()).getValue(); + if (v.intValue() != 0 && v.intValue() != 1) + { + throw new IllegalArgumentException("wrong version for RSA private key"); + } + + version = v; + modulus = ((ASN1Integer)e.nextElement()).getValue(); + publicExponent = ((ASN1Integer)e.nextElement()).getValue(); + privateExponent = ((ASN1Integer)e.nextElement()).getValue(); + prime1 = ((ASN1Integer)e.nextElement()).getValue(); + prime2 = ((ASN1Integer)e.nextElement()).getValue(); + exponent1 = ((ASN1Integer)e.nextElement()).getValue(); + exponent2 = ((ASN1Integer)e.nextElement()).getValue(); + coefficient = ((ASN1Integer)e.nextElement()).getValue(); + + if (e.hasMoreElements()) + { + otherPrimeInfos = (ASN1Sequence)e.nextElement(); + } + } + + public BigInteger getVersion() + { + return version; + } + + public BigInteger getModulus() + { + return modulus; + } + + public BigInteger getPublicExponent() + { + return publicExponent; + } + + public BigInteger getPrivateExponent() + { + return privateExponent; + } + + public BigInteger getPrime1() + { + return prime1; + } + + public BigInteger getPrime2() + { + return prime2; + } + + public BigInteger getExponent1() + { + return exponent1; + } + + public BigInteger getExponent2() + { + return exponent2; + } + + public BigInteger getCoefficient() + { + return coefficient; + } + + /** + * This outputs the key in PKCS1v2 format. + * <pre> + * RSAPrivateKey ::= SEQUENCE { + * version Version, + * modulus INTEGER, -- n + * publicExponent INTEGER, -- e + * privateExponent INTEGER, -- d + * prime1 INTEGER, -- p + * prime2 INTEGER, -- q + * exponent1 INTEGER, -- d mod (p-1) + * exponent2 INTEGER, -- d mod (q-1) + * coefficient INTEGER, -- (inverse of q) mod p + * otherPrimeInfos OtherPrimeInfos OPTIONAL + * } + * + * Version ::= INTEGER { two-prime(0), multi(1) } + * (CONSTRAINED BY {-- version must be multi if otherPrimeInfos present --}) + * </pre> + * <p> + * This routine is written to output PKCS1 version 2.1, private keys. + */ + public ASN1Primitive toASN1Primitive() + { + ASN1EncodableVector v = new ASN1EncodableVector(); + + v.add(new ASN1Integer(version)); // version + v.add(new ASN1Integer(getModulus())); + v.add(new ASN1Integer(getPublicExponent())); + v.add(new ASN1Integer(getPrivateExponent())); + v.add(new ASN1Integer(getPrime1())); + v.add(new ASN1Integer(getPrime2())); + v.add(new ASN1Integer(getExponent1())); + v.add(new ASN1Integer(getExponent2())); + v.add(new ASN1Integer(getCoefficient())); + + if (otherPrimeInfos != null) + { + v.add(otherPrimeInfos); + } + + return new DERSequence(v); + } +} |