diff options
Diffstat (limited to 'libraries/spongycastle/core/src/main/jdk1.1/org/spongycastle/crypto/signers/RSADigestSigner.java')
-rw-r--r-- | libraries/spongycastle/core/src/main/jdk1.1/org/spongycastle/crypto/signers/RSADigestSigner.java | 238 |
1 files changed, 0 insertions, 238 deletions
diff --git a/libraries/spongycastle/core/src/main/jdk1.1/org/spongycastle/crypto/signers/RSADigestSigner.java b/libraries/spongycastle/core/src/main/jdk1.1/org/spongycastle/crypto/signers/RSADigestSigner.java deleted file mode 100644 index e6a99d890..000000000 --- a/libraries/spongycastle/core/src/main/jdk1.1/org/spongycastle/crypto/signers/RSADigestSigner.java +++ /dev/null @@ -1,238 +0,0 @@ -package org.spongycastle.crypto.signers; - -import java.io.IOException; -import java.util.Hashtable; - -import org.spongycastle.asn1.ASN1Encoding; -import org.spongycastle.asn1.ASN1ObjectIdentifier; -import org.spongycastle.asn1.DERNull; -import org.spongycastle.asn1.nist.NISTObjectIdentifiers; -import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers; -import org.spongycastle.asn1.teletrust.TeleTrusTObjectIdentifiers; -import org.spongycastle.asn1.x509.AlgorithmIdentifier; -import org.spongycastle.asn1.x509.DigestInfo; -import org.spongycastle.asn1.x509.X509ObjectIdentifiers; -import org.spongycastle.crypto.AsymmetricBlockCipher; -import org.spongycastle.crypto.CipherParameters; -import org.spongycastle.crypto.CryptoException; -import org.spongycastle.crypto.DataLengthException; -import org.spongycastle.crypto.Digest; -import org.spongycastle.crypto.Signer; -import org.spongycastle.crypto.encodings.PKCS1Encoding; -import org.spongycastle.crypto.engines.RSABlindedEngine; -import org.spongycastle.crypto.params.AsymmetricKeyParameter; -import org.spongycastle.crypto.params.ParametersWithRandom; -import org.spongycastle.util.Arrays; - -public class RSADigestSigner - implements Signer -{ - private final AsymmetricBlockCipher rsaEngine = new PKCS1Encoding(new RSABlindedEngine()); - private AlgorithmIdentifier algId; - private Digest digest; - private boolean forSigning; - - private static final Hashtable oidMap = new Hashtable(); - - /* - * Load OID table. - */ - static - { - oidMap.put("RIPEMD128", TeleTrusTObjectIdentifiers.ripemd128); - oidMap.put("RIPEMD160", TeleTrusTObjectIdentifiers.ripemd160); - oidMap.put("RIPEMD256", TeleTrusTObjectIdentifiers.ripemd256); - - oidMap.put("SHA-1", X509ObjectIdentifiers.id_SHA1); - oidMap.put("SHA-224", NISTObjectIdentifiers.id_sha224); - oidMap.put("SHA-256", NISTObjectIdentifiers.id_sha256); - oidMap.put("SHA-384", NISTObjectIdentifiers.id_sha384); - oidMap.put("SHA-512", NISTObjectIdentifiers.id_sha512); - - oidMap.put("MD2", PKCSObjectIdentifiers.md2); - oidMap.put("MD4", PKCSObjectIdentifiers.md4); - oidMap.put("MD5", PKCSObjectIdentifiers.md5); - } - - public RSADigestSigner( - Digest digest) - { - this(digest, (ASN1ObjectIdentifier)oidMap.get(digest.getAlgorithmName())); - } - - public RSADigestSigner( - Digest digest, - ASN1ObjectIdentifier digestOid) - { - this.digest = digest; - this.algId = new AlgorithmIdentifier(digestOid, DERNull.INSTANCE); - } - - /** - * @deprecated - */ - public String getAlgorithmName() - { - return digest.getAlgorithmName() + "withRSA"; - } - - /** - * initialise the signer for signing or verification. - * - * @param forSigning - * true if for signing, false otherwise - * @param parameters - * necessary parameters. - */ - 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(); - - rsaEngine.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() - throws CryptoException, DataLengthException - { - if (!forSigning) - { - throw new IllegalStateException("RSADigestSigner not initialised for signature generation."); - } - - byte[] hash = new byte[digest.getDigestSize()]; - digest.doFinal(hash, 0); - - try - { - byte[] data = derEncode(hash); - return rsaEngine.processBlock(data, 0, data.length); - } - catch (IOException e) - { - throw new CryptoException("unable to encode signature: " + e.getMessage(), e); - } - } - - /** - * return true if the internal state represents the signature described in - * the passed in array. - */ - public boolean verifySignature( - byte[] signature) - { - if (forSigning) - { - throw new IllegalStateException("RSADigestSigner not initialised for verification"); - } - - byte[] hash = new byte[digest.getDigestSize()]; - - digest.doFinal(hash, 0); - - byte[] sig; - byte[] expected; - - try - { - sig = rsaEngine.processBlock(signature, 0, signature.length); - expected = derEncode(hash); - } - catch (Exception e) - { - return false; - } - - if (sig.length == expected.length) - { - return Arrays.constantTimeAreEqual(sig, expected); - } - else if (sig.length == expected.length - 2) // NULL left out - { - int sigOffset = sig.length - hash.length - 2; - int expectedOffset = expected.length - hash.length - 2; - - expected[1] -= 2; // adjust lengths - expected[3] -= 2; - - int nonEqual = 0; - - for (int i = 0; i < hash.length; i++) - { - nonEqual |= (sig[sigOffset + i] ^ expected[expectedOffset + i]); - } - - for (int i = 0; i < sigOffset; i++) - { - nonEqual |= (sig[i] ^ expected[i]); // check header less NULL - } - - return nonEqual == 0; - } - else - { - return false; - } - } - - public void reset() - { - digest.reset(); - } - - private byte[] derEncode( - byte[] hash) - throws IOException - { - DigestInfo dInfo = new DigestInfo(algId, hash); - - return dInfo.getEncoded(ASN1Encoding.DER); - } -} |