diff options
author | Roberto Tyley <roberto.tyley@gmail.com> | 2014-07-15 01:38:01 +0400 |
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committer | Roberto Tyley <roberto.tyley@gmail.com> | 2014-07-26 11:23:17 +0400 |
commit | 7cb752aaf746dc0b473afeb9e892b7fbc12666c5 (patch) | |
tree | cc4f91ddc18332b5adbe82e3fcb040d976c90105 /core/src/main/java/org/bouncycastle/crypto/signers/DSADigestSigner.java | |
parent | 551830f8ea5177042af2c7dd1fc90888bc67387d (diff) |
Execute become-spongy.sh
https://github.com/rtyley/spongycastle/blob/3040af/become-spongy.sh
Diffstat (limited to 'core/src/main/java/org/bouncycastle/crypto/signers/DSADigestSigner.java')
-rw-r--r-- | core/src/main/java/org/bouncycastle/crypto/signers/DSADigestSigner.java | 163 |
1 files changed, 0 insertions, 163 deletions
diff --git a/core/src/main/java/org/bouncycastle/crypto/signers/DSADigestSigner.java b/core/src/main/java/org/bouncycastle/crypto/signers/DSADigestSigner.java deleted file mode 100644 index 684eb9c0..00000000 --- a/core/src/main/java/org/bouncycastle/crypto/signers/DSADigestSigner.java +++ /dev/null @@ -1,163 +0,0 @@ -package org.bouncycastle.crypto.signers; - -import java.io.IOException; -import java.math.BigInteger; - -import org.bouncycastle.asn1.ASN1EncodableVector; -import org.bouncycastle.asn1.ASN1Encoding; -import org.bouncycastle.asn1.ASN1Integer; -import org.bouncycastle.asn1.ASN1Primitive; -import org.bouncycastle.asn1.ASN1Sequence; -import org.bouncycastle.asn1.DERSequence; -import org.bouncycastle.crypto.CipherParameters; -import org.bouncycastle.crypto.DSA; -import org.bouncycastle.crypto.Digest; -import org.bouncycastle.crypto.Signer; -import org.bouncycastle.crypto.params.AsymmetricKeyParameter; -import org.bouncycastle.crypto.params.ParametersWithRandom; - -public class DSADigestSigner - implements Signer -{ - private final Digest digest; - private final DSA dsaSigner; - private boolean forSigning; - - public DSADigestSigner( - DSA signer, - Digest digest) - { - this.digest = digest; - this.dsaSigner = signer; - } - - public void init( - boolean forSigning, - CipherParameters parameters) - { - this.forSigning = forSigning; - - AsymmetricKeyParameter k; - - if (parameters instanceof ParametersWithRandom) - { - k = (AsymmetricKeyParameter)((ParametersWithRandom)parameters).getParameters(); - } - else - { - k = (AsymmetricKeyParameter)parameters; - } - - if (forSigning && !k.isPrivate()) - { - throw new IllegalArgumentException("Signing Requires Private Key."); - } - - if (!forSigning && k.isPrivate()) - { - throw new IllegalArgumentException("Verification Requires Public Key."); - } - - reset(); - - dsaSigner.init(forSigning, parameters); - } - - /** - * update the internal digest with the byte b - */ - public void update( - byte input) - { - digest.update(input); - } - - /** - * update the internal digest with the byte array in - */ - public void update( - byte[] input, - int inOff, - int length) - { - digest.update(input, inOff, length); - } - - /** - * Generate a signature for the message we've been loaded with using - * the key we were initialised with. - */ - public byte[] generateSignature() - { - if (!forSigning) - { - throw new IllegalStateException("DSADigestSigner not initialised for signature generation."); - } - - byte[] hash = new byte[digest.getDigestSize()]; - digest.doFinal(hash, 0); - - BigInteger[] sig = dsaSigner.generateSignature(hash); - - try - { - return derEncode(sig[0], sig[1]); - } - catch (IOException e) - { - throw new IllegalStateException("unable to encode signature"); - } - } - - public boolean verifySignature( - byte[] signature) - { - if (forSigning) - { - throw new IllegalStateException("DSADigestSigner not initialised for verification"); - } - - byte[] hash = new byte[digest.getDigestSize()]; - digest.doFinal(hash, 0); - - try - { - BigInteger[] sig = derDecode(signature); - return dsaSigner.verifySignature(hash, sig[0], sig[1]); - } - catch (IOException e) - { - return false; - } - } - - public void reset() - { - digest.reset(); - } - - private byte[] derEncode( - BigInteger r, - BigInteger s) - throws IOException - { - ASN1EncodableVector v = new ASN1EncodableVector(); - v.add(new ASN1Integer(r)); - v.add(new ASN1Integer(s)); - - return new DERSequence(v).getEncoded(ASN1Encoding.DER); - } - - private BigInteger[] derDecode( - byte[] encoding) - throws IOException - { - ASN1Sequence s = (ASN1Sequence)ASN1Primitive.fromByteArray(encoding); - - return new BigInteger[] - { - ((ASN1Integer)s.getObjectAt(0)).getValue(), - ((ASN1Integer)s.getObjectAt(1)).getValue() - }; - } -} |