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/*
* Copyright (C) 2019 jsonwebtoken.io
*
* 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 acscommons.io.jsonwebtoken;
import acscommons.io.jsonwebtoken.io.Decoder;
import acscommons.io.jsonwebtoken.io.Deserializer;
import java.security.Key;
import java.util.Date;
import java.util.Map;
/**
* A builder to construct a {@link JwtParser}. Example usage:
* {@code
* Jwts.parserBuilder()
* .setSigningKey(...)
* .requireIssuer("https://issuer.example.com")
* .build()
* .parse(jwtString)
* }
*
* @since 0.11.0
*/
@SuppressWarnings("JavadocLinkAsPlainText")
public interface JwtParserBuilder {
/**
* Ensures that the specified {@code jti} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param id the required value of the {@code jti} header parameter.
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireId(String id);
/**
* Ensures that the specified {@code sub} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param subject the required value of the {@code sub} header parameter.
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireSubject(String subject);
/**
* Ensures that the specified {@code aud} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param audience the required value of the {@code aud} header parameter.
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireAudience(String audience);
/**
* Ensures that the specified {@code iss} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param issuer the required value of the {@code iss} header parameter.
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireIssuer(String issuer);
/**
* Ensures that the specified {@code iat} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param issuedAt the required value of the {@code iat} header parameter.
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireIssuedAt(Date issuedAt);
/**
* Ensures that the specified {@code exp} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param expiration the required value of the {@code exp} header parameter.
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireExpiration(Date expiration);
/**
* Ensures that the specified {@code nbf} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param notBefore the required value of the {@code npf} header parameter.
* @return the parser builder for method chaining
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder requireNotBefore(Date notBefore);
/**
* Ensures that the specified {@code claimName} exists in the parsed JWT. If missing or if the parsed
* value does not equal the specified value, an exception will be thrown indicating that the
* JWT is invalid and may not be used.
*
* @param claimName the name of a claim that must exist
* @param value the required value of the specified {@code claimName}
* @return the parser builder for method chaining.
* @see MissingClaimException
* @see IncorrectClaimException
*/
JwtParserBuilder require(String claimName, Object value);
/**
* Sets the {@link Clock} that determines the timestamp to use when validating the parsed JWT.
* The parser uses a default Clock implementation that simply returns {@code new Date()} when called.
*
* @param clock a {@code Clock} object to return the timestamp to use when validating the parsed JWT.
* @return the parser builder for method chaining.
*/
JwtParserBuilder setClock(Clock clock);
/**
* Sets the amount of clock skew in seconds to tolerate when verifying the local time against the {@code exp}
* and {@code nbf} claims.
*
* @param seconds the number of seconds to tolerate for clock skew when verifying {@code exp} or {@code nbf} claims.
* @return the parser builder for method chaining.
* @throws IllegalArgumentException if {@code seconds} is a value greater than {@code Long.MAX_VALUE / 1000} as
* any such value would cause numeric overflow when multiplying by 1000 to obtain
* a millisecond value.
*/
JwtParserBuilder setAllowedClockSkewSeconds(long seconds) throws IllegalArgumentException;
/**
* Sets the signing key used to verify any discovered JWS digital signature. If the specified JWT string is not
* a JWS (no signature), this key is not used.
*
* Note that this key MUST be a valid key for the signature algorithm found in the JWT header
* (as the {@code alg} header parameter).
*
* This method overwrites any previously set key.
*
* @param key the algorithm-specific signature verification key used to validate any discovered JWS digital
* signature.
* @return the parser builder for method chaining.
*/
JwtParserBuilder setSigningKey(byte[] key);
/**
* Sets the signing key used to verify any discovered JWS digital signature. If the specified JWT string is not
* a JWS (no signature), this key is not used.
*
* Note that this key MUST be a valid key for the signature algorithm found in the JWT header
* (as the {@code alg} header parameter).
*
* This method overwrites any previously set key.
*
* This is a convenience method: the string argument is first BASE64-decoded to a byte array and this resulting
* byte array is used to invoke {@link #setSigningKey(byte[])}.
*
* Deprecation Notice: Deprecated as of 0.10.0, will be removed in 1.0.0
*
* This method has been deprecated because the {@code key} argument for this method can be confusing: keys for
* cryptographic operations are always binary (byte arrays), and many people were confused as to how bytes were
* obtained from the String argument.
*
* This method always expected a String argument that was effectively the same as the result of the following
* (pseudocode):
*
* {@code String base64EncodedSecretKey = base64Encode(secretKeyBytes);}
*
* However, a non-trivial number of JJWT users were confused by the method signature and attempted to
* use raw password strings as the key argument - for example {@code setSigningKey(myPassword)} - which is
* almost always incorrect for cryptographic hashes and can produce erroneous or insecure results.
*
* See this
*
* StackOverflow answer explaining why raw (non-base64-encoded) strings are almost always incorrect for
* signature operations.
*
* Finally, please use the {@link #setSigningKey(Key) setSigningKey(Key)} instead, as this method (and likely the
* {@code byte[]} variant) will be removed before the 1.0.0 release.
*
* @param base64EncodedSecretKey the BASE64-encoded algorithm-specific signature verification key to use to validate
* any discovered JWS digital signature.
* @return the parser builder for method chaining.
* @deprecated in favor of {@link #setSigningKey(Key)} as explained in the above Deprecation Notice,
* and will be removed in 1.0.0.
*/
@Deprecated
JwtParserBuilder setSigningKey(String base64EncodedSecretKey);
/**
* Sets the signing key used to verify any discovered JWS digital signature. If the specified JWT string is not
* a JWS (no signature), this key is not used.
*
* Note that this key MUST be a valid key for the signature algorithm found in the JWT header
* (as the {@code alg} header parameter).
*
* This method overwrites any previously set key.
*
* @param key the algorithm-specific signature verification key to use to validate any discovered JWS digital
* signature.
* @return the parser builder for method chaining.
*/
JwtParserBuilder setSigningKey(Key key);
/**
* Sets the {@link SigningKeyResolver} used to acquire the signing key that should be used to verify
* a JWS's signature. If the parsed String is not a JWS (no signature), this resolver is not used.
*
* Specifying a {@code SigningKeyResolver} is necessary when the signing key is not already known before parsing
* the JWT and the JWT header or payload (plaintext body or Claims) must be inspected first to determine how to
* look up the signing key. Once returned by the resolver, the JwtParser will then verify the JWS signature with the
* returned key. For example:
*
*
* Jws<Claims> jws = Jwts.parser().setSigningKeyResolver(new SigningKeyResolverAdapter() {
* @Override
* public byte[] resolveSigningKeyBytes(JwsHeader header, Claims claims) {
* //inspect the header or claims, lookup and return the signing key
* return getSigningKey(header, claims); //implement me
* }})
* .parseClaimsJws(compact);
*
*
* A {@code SigningKeyResolver} is invoked once during parsing before the signature is verified.
*
* This method should only be used if a signing key is not provided by the other {@code setSigningKey*} builder
* methods.
*
* @param signingKeyResolver the signing key resolver used to retrieve the signing key.
* @return the parser builder for method chaining.
*/
JwtParserBuilder setSigningKeyResolver(SigningKeyResolver signingKeyResolver);
/**
* Sets the {@link CompressionCodecResolver} used to acquire the {@link CompressionCodec} that should be used to
* decompress the JWT body. If the parsed JWT is not compressed, this resolver is not used.
*
* NOTE: Compression is not defined by the JWT Specification, and it is not expected that other libraries
* (including JJWT versions < 0.6.0) are able to consume a compressed JWT body correctly. This method is only
* useful if the compact JWT was compressed with JJWT >= 0.6.0 or another library that you know implements
* the same behavior.
*
* Default Support
*
* JJWT's default {@link JwtParser} implementation supports both the
* {@link CompressionCodecs#DEFLATE DEFLATE}
* and {@link CompressionCodecs#GZIP GZIP} algorithms by default - you do not need to
* specify a {@code CompressionCodecResolver} in these cases.
*
* However, if you want to use a compression algorithm other than {@code DEF} or {@code GZIP}, you must implement
* your own {@link CompressionCodecResolver} and specify that via this method and also when
* {@link acscommons.io.jsonwebtoken.JwtBuilder#compressWith(CompressionCodec) building} JWTs.
*
* @param compressionCodecResolver the compression codec resolver used to decompress the JWT body.
* @return the parser builder for method chaining.
*/
JwtParserBuilder setCompressionCodecResolver(CompressionCodecResolver compressionCodecResolver);
/**
* Perform Base64Url decoding with the specified Decoder
*
* JJWT uses a spec-compliant decoder that works on all supported JDK versions, but you may call this method
* to specify a different decoder if you desire.
*
* @param base64UrlDecoder the decoder to use when Base64Url-decoding
* @return the parser builder for method chaining.
*/
JwtParserBuilder base64UrlDecodeWith(Decoder base64UrlDecoder);
/**
* Uses the specified deserializer to convert JSON Strings (UTF-8 byte arrays) into Java Map objects. This is
* used by the parser after Base64Url-decoding to convert JWT/JWS/JWT JSON headers and claims into Java Map
* objects.
*
* If this method is not called, JJWT will use whatever deserializer it can find at runtime, checking for the
* presence of well-known implementations such Jackson, Gson, and org.json. If one of these is not found
* in the runtime classpath, an exception will be thrown when one of the various {@code parse}* methods is
* invoked.
*
* @param deserializer the deserializer to use when converting JSON Strings (UTF-8 byte arrays) into Map objects.
* @return the builder for method chaining.
*/
JwtParserBuilder deserializeJsonWith(Deserializer> deserializer);
/**
* Returns an immutable/thread-safe {@link JwtParser} created from the configuration from this JwtParserBuilder.
*
* @return an immutable/thread-safe JwtParser created from the configuration from this JwtParserBuilder.
*/
JwtParser build();
}