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

package com.google.crypto.tink.signature;

import java.security.GeneralSecurityException;
import com.google.crypto.tink.internal.OutputPrefixUtil;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import com.google.crypto.tink.Parameters;
import java.util.Objects;
import com.google.crypto.tink.Key;
import com.google.crypto.tink.AccessesPartialKey;
import com.google.errorprone.annotations.RestrictedApi;
import javax.annotation.Nullable;
import com.google.crypto.tink.util.Bytes;
import java.math.BigInteger;

public final class RsaSsaPkcs1PublicKey extends SignaturePublicKey
{
    private final RsaSsaPkcs1Parameters parameters;
    private final BigInteger modulus;
    private final Bytes outputPrefix;
    @Nullable
    private final Integer idRequirement;
    
    private RsaSsaPkcs1PublicKey(final RsaSsaPkcs1Parameters parameters, final BigInteger modulus, final Bytes outputPrefix, @Nullable final Integer idRequirement) {
        this.parameters = parameters;
        this.modulus = modulus;
        this.outputPrefix = outputPrefix;
        this.idRequirement = idRequirement;
    }
    
    @RestrictedApi(explanation = "Accessing parts of keys can produce unexpected incompatibilities, annotate the function with @AccessesPartialKey", link = "https://developers.google.com/tink/design/access_control#accessing_partial_keys", allowedOnPath = ".*Test\\.java", allowlistAnnotations = { AccessesPartialKey.class })
    public static Builder builder() {
        return new Builder();
    }
    
    @RestrictedApi(explanation = "Accessing parts of keys can produce unexpected incompatibilities, annotate the function with @AccessesPartialKey", link = "https://developers.google.com/tink/design/access_control#accessing_partial_keys", allowedOnPath = ".*Test\\.java", allowlistAnnotations = { AccessesPartialKey.class })
    public BigInteger getModulus() {
        return this.modulus;
    }
    
    @Override
    public Bytes getOutputPrefix() {
        return this.outputPrefix;
    }
    
    @Override
    public RsaSsaPkcs1Parameters getParameters() {
        return this.parameters;
    }
    
    @Nullable
    @Override
    public Integer getIdRequirementOrNull() {
        return this.idRequirement;
    }
    
    @Override
    public boolean equalsKey(final Key o) {
        if (!(o instanceof RsaSsaPkcs1PublicKey)) {
            return false;
        }
        final RsaSsaPkcs1PublicKey that = (RsaSsaPkcs1PublicKey)o;
        return that.parameters.equals(this.parameters) && that.modulus.equals(this.modulus) && Objects.equals(that.idRequirement, this.idRequirement);
    }
    
    public static class Builder
    {
        @Nullable
        private RsaSsaPkcs1Parameters parameters;
        @Nullable
        private BigInteger modulus;
        @Nullable
        private Integer idRequirement;
        
        private Builder() {
            this.parameters = null;
            this.modulus = null;
            this.idRequirement = null;
        }
        
        @CanIgnoreReturnValue
        public Builder setParameters(final RsaSsaPkcs1Parameters parameters) {
            this.parameters = parameters;
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setModulus(final BigInteger modulus) {
            this.modulus = modulus;
            return this;
        }
        
        @CanIgnoreReturnValue
        public Builder setIdRequirement(@Nullable final Integer idRequirement) {
            this.idRequirement = idRequirement;
            return this;
        }
        
        private Bytes getOutputPrefix() {
            if (this.parameters.getVariant() == RsaSsaPkcs1Parameters.Variant.NO_PREFIX) {
                return OutputPrefixUtil.EMPTY_PREFIX;
            }
            if (this.parameters.getVariant() == RsaSsaPkcs1Parameters.Variant.LEGACY || this.parameters.getVariant() == RsaSsaPkcs1Parameters.Variant.CRUNCHY) {
                return OutputPrefixUtil.getLegacyOutputPrefix(this.idRequirement);
            }
            if (this.parameters.getVariant() == RsaSsaPkcs1Parameters.Variant.TINK) {
                return OutputPrefixUtil.getTinkOutputPrefix(this.idRequirement);
            }
            throw new IllegalStateException("Unknown RsaSsaPkcs1Parameters.Variant: " + this.parameters.getVariant());
        }
        
        public RsaSsaPkcs1PublicKey build() throws GeneralSecurityException {
            if (this.parameters == null) {
                throw new GeneralSecurityException("Cannot build without parameters");
            }
            if (this.modulus == null) {
                throw new GeneralSecurityException("Cannot build without modulus");
            }
            final int modulusSize = this.modulus.bitLength();
            final int paramModulusSize = this.parameters.getModulusSizeBits();
            if (modulusSize != paramModulusSize) {
                throw new GeneralSecurityException("Got modulus size " + modulusSize + ", but parameters requires modulus size " + paramModulusSize);
            }
            if (this.parameters.hasIdRequirement() && this.idRequirement == null) {
                throw new GeneralSecurityException("Cannot create key without ID requirement with parameters with ID requirement");
            }
            if (!this.parameters.hasIdRequirement() && this.idRequirement != null) {
                throw new GeneralSecurityException("Cannot create key with ID requirement with parameters without ID requirement");
            }
            final Bytes outputPrefix = this.getOutputPrefix();
            return new RsaSsaPkcs1PublicKey(this.parameters, this.modulus, outputPrefix, this.idRequirement, null);
        }
    }
}