// 
// Decompiled by Procyon v0.6.0
// 

package com.google.crypto.tink.signature;

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.security.GeneralSecurityException;
import com.google.crypto.tink.internal.EllipticCurvesUtil;
import java.security.spec.ECParameterSpec;
import com.google.errorprone.annotations.Immutable;
import java.util.Objects;

public final class EcdsaParameters extends SignatureParameters
{
    private final SignatureEncoding signatureEncoding;
    private final CurveType curveType;
    private final HashType hashType;
    private final Variant variant;
    
    private EcdsaParameters(final SignatureEncoding signatureEncoding, final CurveType curveType, final HashType hashType, final Variant variant) {
        this.signatureEncoding = signatureEncoding;
        this.curveType = curveType;
        this.hashType = hashType;
        this.variant = variant;
    }
    
    public static Builder builder() {
        return new Builder();
    }
    
    public SignatureEncoding getSignatureEncoding() {
        return this.signatureEncoding;
    }
    
    public CurveType getCurveType() {
        return this.curveType;
    }
    
    public HashType getHashType() {
        return this.hashType;
    }
    
    public Variant getVariant() {
        return this.variant;
    }
    
    @Override
    public boolean equals(final Object o) {
        if (!(o instanceof EcdsaParameters)) {
            return false;
        }
        final EcdsaParameters that = (EcdsaParameters)o;
        return that.getSignatureEncoding() == this.getSignatureEncoding() && that.getCurveType() == this.getCurveType() && that.getHashType() == this.getHashType() && that.getVariant() == this.getVariant();
    }
    
    @Override
    public int hashCode() {
        return Objects.hash(EcdsaParameters.class, this.signatureEncoding, this.curveType, this.hashType, this.variant);
    }
    
    @Override
    public boolean hasIdRequirement() {
        return this.variant != Variant.NO_PREFIX;
    }
    
    @Override
    public String toString() {
        return "ECDSA Parameters (variant: " + this.variant + ", hashType: " + this.hashType + ", encoding: " + this.signatureEncoding + ", curve: " + this.curveType + ")";
    }
    
    @Immutable
    public static final class Variant
    {
        public static final Variant TINK;
        public static final Variant CRUNCHY;
        public static final Variant LEGACY;
        public static final Variant NO_PREFIX;
        private final String name;
        
        private Variant(final String name) {
            this.name = name;
        }
        
        @Override
        public String toString() {
            return this.name;
        }
        
        static {
            TINK = new Variant("TINK");
            CRUNCHY = new Variant("CRUNCHY");
            LEGACY = new Variant("LEGACY");
            NO_PREFIX = new Variant("NO_PREFIX");
        }
    }
    
    @Immutable
    public static final class SignatureEncoding
    {
        public static final SignatureEncoding IEEE_P1363;
        public static final SignatureEncoding DER;
        private final String name;
        
        private SignatureEncoding(final String name) {
            this.name = name;
        }
        
        @Override
        public String toString() {
            return this.name;
        }
        
        static {
            IEEE_P1363 = new SignatureEncoding("IEEE_P1363");
            DER = new SignatureEncoding("DER");
        }
    }
    
    @Immutable
    public static final class CurveType
    {
        public static final CurveType NIST_P256;
        public static final CurveType NIST_P384;
        public static final CurveType NIST_P521;
        private final String name;
        private final ECParameterSpec spec;
        
        private CurveType(final String name, final ECParameterSpec spec) {
            this.name = name;
            this.spec = spec;
        }
        
        @Override
        public String toString() {
            return this.name;
        }
        
        public ECParameterSpec toParameterSpec() {
            return this.spec;
        }
        
        public static CurveType fromParameterSpec(final ECParameterSpec spec) throws GeneralSecurityException {
            if (EllipticCurvesUtil.isSameEcParameterSpec(spec, CurveType.NIST_P256.toParameterSpec())) {
                return CurveType.NIST_P256;
            }
            if (EllipticCurvesUtil.isSameEcParameterSpec(spec, CurveType.NIST_P384.toParameterSpec())) {
                return CurveType.NIST_P384;
            }
            if (EllipticCurvesUtil.isSameEcParameterSpec(spec, CurveType.NIST_P521.toParameterSpec())) {
                return CurveType.NIST_P521;
            }
            throw new GeneralSecurityException("unknown ECParameterSpec");
        }
        
        static {
            NIST_P256 = new CurveType("NIST_P256", EllipticCurvesUtil.NIST_P256_PARAMS);
            NIST_P384 = new CurveType("NIST_P384", EllipticCurvesUtil.NIST_P384_PARAMS);
            NIST_P521 = new CurveType("NIST_P521", EllipticCurvesUtil.NIST_P521_PARAMS);
        }
    }
    
    @Immutable
    public static final class HashType
    {
        public static final HashType SHA256;
        public static final HashType SHA384;
        public static final HashType SHA512;
        private final String name;
        
        private HashType(final String name) {
            this.name = name;
        }
        
        @Override
        public String toString() {
            return this.name;
        }
        
        static {
            SHA256 = new HashType("SHA256");
            SHA384 = new HashType("SHA384");
            SHA512 = new HashType("SHA512");
        }
    }
    
    public static final class Builder
    {
        private SignatureEncoding signatureEncoding;
        private CurveType curveType;
        private HashType hashType;
        private Variant variant;
        
        private Builder() {
            this.signatureEncoding = null;
            this.curveType = null;
            this.hashType = null;
            this.variant = Variant.NO_PREFIX;
        }
        
        @CanIgnoreReturnValue
        public Builder setSignatureEncoding(final SignatureEncoding signatureEncoding) {
            this.signatureEncoding = signatureEncoding;
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setCurveType(final CurveType curveType) {
            this.curveType = curveType;
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setHashType(final HashType hashType) {
            this.hashType = hashType;
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setVariant(final Variant variant) {
            this.variant = variant;
            return this;
        }
        
        public EcdsaParameters build() throws GeneralSecurityException {
            if (this.signatureEncoding == null) {
                throw new GeneralSecurityException("signature encoding is not set");
            }
            if (this.curveType == null) {
                throw new GeneralSecurityException("EC curve type is not set");
            }
            if (this.hashType == null) {
                throw new GeneralSecurityException("hash type is not set");
            }
            if (this.variant == null) {
                throw new GeneralSecurityException("variant is not set");
            }
            if (this.curveType == CurveType.NIST_P256 && this.hashType != HashType.SHA256) {
                throw new GeneralSecurityException("NIST_P256 requires SHA256");
            }
            if (this.curveType == CurveType.NIST_P384 && this.hashType != HashType.SHA384 && this.hashType != HashType.SHA512) {
                throw new GeneralSecurityException("NIST_P384 requires SHA384 or SHA512");
            }
            if (this.curveType == CurveType.NIST_P521 && this.hashType != HashType.SHA512) {
                throw new GeneralSecurityException("NIST_P521 requires SHA512");
            }
            return new EcdsaParameters(this.signatureEncoding, this.curveType, this.hashType, this.variant, null);
        }
    }
}