// Path: api/src/main/java/net/adamcin/httpsig/api/Algorithm.java
// public enum Algorithm {
//     RSA_SHA1("rsa-sha1"),
//     RSA_SHA256("rsa-sha256"),
//     RSA_SHA512("rsa-sha512"),
//     DSA_SHA1("dsa-sha1"),
//     HMAC_SHA1("hmac-sha1"),
//     HMAC_SHA256("hmac-sha256"),
//     HMAC_SHA512("hmac-sha512"),
//     SSH_RSA("ssh-rsa"),
//     SSH_DSS("ssh-dss");
// 
//     private final String name;
// 
//     private Algorithm(String name) {
//         this.name = name;
//     }
// 
//     public String getName() {
//         return name;
//     }
// 
//     public static Algorithm forName(String name) {
//         for (Algorithm algorithm : Algorithm.values()) {
//             if (algorithm.getName().equalsIgnoreCase(name)) {
//                 return algorithm;
//             }
//         }
// 
//         return null;
//     }
// }
// 
// Path: api/src/main/java/net/adamcin/httpsig/api/Key.java
// public interface Key {
// 
//     /**
//      * @return the {@link Key}'s self-identification. This may end up not being unique within a keychain.
//      */
//     String getId();
// 
//     /**
//      * @return the {@link Set} of Signature {@link Algorithm}s supported by this key.
//      */
//     Set<Algorithm> getAlgorithms();
// 
//     /**
//      * @return true if this {@link Key} can be used for verification
//      */
//     boolean canVerify();
// 
//     /**
//      * Verifies the {@code signatureBytes} against the {@code challengeHash} using an underlying public key
//      * @param algorithm the selected Signature {@link Algorithm}
//      * @param contentBytes the result of {@link RequestContent#getBytesToSign(java.util.List, java.nio.charset.Charset)}
//      * @param signatureBytes the result of {@link net.adamcin.httpsig.api.Authorization#getSignatureBytes()}
//      * @return true if signature is valid
//      */
//     boolean verify(Algorithm algorithm, byte[] contentBytes, byte[] signatureBytes);
// 
//     /**
//      * @return true if this {@link Key} can be used for signing
//      */
//     boolean canSign();
// 
//     /**
//      * Signs the {@code challengeHash} using the specified signature {@link Algorithm}
//      * @param algorithm the selected Signature {@link Algorithm}
//      * @param contentBytes the result of {@link RequestContent#getBytesToSign(java.util.List, java.nio.charset.Charset)}
//      * @return byte array containing the challengeHash signature or null if a signature could not be generated.
//      */
//     byte[] sign(Algorithm algorithm, byte[] contentBytes);
// }


import org.slf4j.LoggerFactory;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import net.adamcin.httpsig.api.Algorithm;
import net.adamcin.httpsig.api.Key;
import org.slf4j.Logger;
/*
 * This is free and unencumbered software released into the public domain.
 *
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 *
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * For more information, please refer to <http://unlicense.org/>
 */

package net.adamcin.httpsig.hmac;



public class HmacKey implements Key {

    private final String keyId;
    private final String secret;

    private static final byte[] EMPTY_BYTES = new byte[0];
    private static final Logger LOGGER = LoggerFactory.getLogger(HmacKey.class);

    /**
     * Instantiates a new HMAC key with an identifier and a secret used to sign
     * @param keyId The keys identifier
     * @param secret The secret used to sign
     */
    public HmacKey(String keyId, String secret) {
        if (keyId == null) {
            throw new NullPointerException("keyId must not be null");
        }
        if (secret == null) {
            throw new NullPointerException("secret must not be null");
        }
        this.keyId = keyId;
        this.secret = secret;
    }

    /**
     * @return the {@link net.adamcin.httpsig.api.Key}'s self-identification. This may end up not being unique within a keychain.
     */
    public String getId() {
        return keyId;
    }

    /**
     * @return the {@link java.util.Set} of Signature {@link net.adamcin.httpsig.api.Algorithm}s supported by this key.
     */
// Path: api/src/main/java/net/adamcin/httpsig/api/Algorithm.java
// public enum Algorithm {
//     RSA_SHA1("rsa-sha1"),
//     RSA_SHA256("rsa-sha256"),
//     RSA_SHA512("rsa-sha512"),
//     DSA_SHA1("dsa-sha1"),
//     HMAC_SHA1("hmac-sha1"),
//     HMAC_SHA256("hmac-sha256"),
//     HMAC_SHA512("hmac-sha512"),
//     SSH_RSA("ssh-rsa"),
//     SSH_DSS("ssh-dss");
// 
//     private final String name;
// 
//     private Algorithm(String name) {
//         this.name = name;
//     }
// 
//     public String getName() {
//         return name;
//     }
// 
//     public static Algorithm forName(String name) {
//         for (Algorithm algorithm : Algorithm.values()) {
//             if (algorithm.getName().equalsIgnoreCase(name)) {
//                 return algorithm;
//             }
//         }
// 
//         return null;
//     }
// }
// 
// Path: api/src/main/java/net/adamcin/httpsig/api/Key.java
// public interface Key {
// 
//     /**
//      * @return the {@link Key}'s self-identification. This may end up not being unique within a keychain.
//      */
//     String getId();
// 
//     /**
//      * @return the {@link Set} of Signature {@link Algorithm}s supported by this key.
//      */
//     Set<Algorithm> getAlgorithms();
// 
//     /**
//      * @return true if this {@link Key} can be used for verification
//      */
//     boolean canVerify();
// 
//     /**
//      * Verifies the {@code signatureBytes} against the {@code challengeHash} using an underlying public key
//      * @param algorithm the selected Signature {@link Algorithm}
//      * @param contentBytes the result of {@link RequestContent#getBytesToSign(java.util.List, java.nio.charset.Charset)}
//      * @param signatureBytes the result of {@link net.adamcin.httpsig.api.Authorization#getSignatureBytes()}
//      * @return true if signature is valid
//      */
//     boolean verify(Algorithm algorithm, byte[] contentBytes, byte[] signatureBytes);
// 
//     /**
//      * @return true if this {@link Key} can be used for signing
//      */
//     boolean canSign();
// 
//     /**
//      * Signs the {@code challengeHash} using the specified signature {@link Algorithm}
//      * @param algorithm the selected Signature {@link Algorithm}
//      * @param contentBytes the result of {@link RequestContent#getBytesToSign(java.util.List, java.nio.charset.Charset)}
//      * @return byte array containing the challengeHash signature or null if a signature could not be generated.
//      */
//     byte[] sign(Algorithm algorithm, byte[] contentBytes);
// }


// Path: hmac/src/main/java/net/adamcin/httpsig/hmac/HmacKey.java
import org.slf4j.LoggerFactory;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import net.adamcin.httpsig.api.Algorithm;
import net.adamcin.httpsig.api.Key;
import org.slf4j.Logger;

/*
 * This is free and unencumbered software released into the public domain.
 *
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 *
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * For more information, please refer to <http://unlicense.org/>
 */

package net.adamcin.httpsig.hmac;



public class HmacKey implements Key {

    private final String keyId;
    private final String secret;

    private static final byte[] EMPTY_BYTES = new byte[0];
    private static final Logger LOGGER = LoggerFactory.getLogger(HmacKey.class);

    /**
     * Instantiates a new HMAC key with an identifier and a secret used to sign
     * @param keyId The keys identifier
     * @param secret The secret used to sign
     */
    public HmacKey(String keyId, String secret) {
        if (keyId == null) {
            throw new NullPointerException("keyId must not be null");
        }
        if (secret == null) {
            throw new NullPointerException("secret must not be null");
        }
        this.keyId = keyId;
        this.secret = secret;
    }

    /**
     * @return the {@link net.adamcin.httpsig.api.Key}'s self-identification. This may end up not being unique within a keychain.
     */
    public String getId() {
        return keyId;
    }

    /**
     * @return the {@link java.util.Set} of Signature {@link net.adamcin.httpsig.api.Algorithm}s supported by this key.
     */
    public Set<Algorithm> getAlgorithms() {