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/* Copyright 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.firebase.projectmanagement;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.base.Ascii;
import com.google.common.base.MoreObjects;
import com.google.common.base.Objects;
import com.google.common.base.Preconditions;
import java.util.regex.Pattern;

/**
 * Information about an SHA certificate associated with an Android app.
 */
public class ShaCertificate {

  private static final Pattern SHA1_PATTERN = Pattern.compile("[0-9a-fA-F]{40}");
  private static final Pattern SHA256_PATTERN = Pattern.compile("[0-9a-fA-F]{64}");

  private final String name;
  private final String shaHash;
  private final ShaCertificateType certType;

  private ShaCertificate(String name, String shaHash, ShaCertificateType certType) {
    this.name = Preconditions.checkNotNull(name, "Null name");
    this.shaHash = Preconditions.checkNotNull(shaHash, "Null shaHash");
    this.certType = Preconditions.checkNotNull(certType, "Null certType");
  }

  /**
   * Creates an {@link ShaCertificate} from the given certificate hash.
   *
   * 

The fully qualified resource name of this certificate will be set to the empty string since * it has not been generated yet. * * @param shaHash SHA hash of the certificate * @return a new {@link ShaCertificate} instance */ public static ShaCertificate create(String shaHash) { return new ShaCertificate("", shaHash, getTypeFromHash(shaHash)); } static ShaCertificate create(String name, String shaHash) { return new ShaCertificate(name, shaHash, getTypeFromHash(shaHash)); } /** * Returns the type of the certificate based on its hash. * * @throws IllegalArgumentException if the SHA hash is neither SHA-1 nor SHA-256 */ @VisibleForTesting static ShaCertificateType getTypeFromHash(String shaHash) { Preconditions.checkNotNull(shaHash, "Null shaHash"); shaHash = Ascii.toLowerCase(shaHash); if (SHA1_PATTERN.matcher(shaHash).matches()) { return ShaCertificateType.SHA_1; } else if (SHA256_PATTERN.matcher(shaHash).matches()) { return ShaCertificateType.SHA_256; } throw new IllegalArgumentException("Invalid SHA hash; it is neither SHA-1 nor SHA-256."); } /** * Returns the fully qualified resource name of this SHA certificate. */ public String getName() { return name; } /** * Returns the hash of this SHA certificate. */ public String getShaHash() { return shaHash; } /** * Returns the type of this SHA certificate. */ public ShaCertificateType getCertType() { return certType; } @Override public boolean equals(Object o) { if (o == this) { return true; } if (o instanceof ShaCertificate) { ShaCertificate that = (ShaCertificate) o; return (this.name.equals(that.getName())) && (this.shaHash.equals(that.getShaHash())) && (this.certType.equals(that.getCertType())); } return false; } @Override public String toString() { return MoreObjects.toStringHelper("ShaCertificate") .add("name", name) .add("shaHash", shaHash) .add("certType", certType) .toString(); } @Override public int hashCode() { return Objects.hashCode(name, shaHash, certType); } }





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