Package software.amazon.awssdk.auth.signer.internal

Class AbstractAws4Signer<T extends Aws4SignerParams,U extends Aws4PresignerParams>

java.lang.Object

software.amazon.awssdk.auth.signer.internal.AbstractAwsSigner

software.amazon.awssdk.auth.signer.internal.AbstractAws4Signer<T,U>

Type Parameters:

T - Type of the signing params class that is used for signing the request

U - Type of the signing params class that is used for pre signing the request

All Implemented Interfaces:

Presigner, Signer

Direct Known Subclasses:

AbstractAwsS3V4Signer, BaseAws4Signer

@SdkInternalApi
public abstract class AbstractAws4Signer<T extends Aws4SignerParams,U extends Aws4PresignerParams>
extends AbstractAwsSigner
implements Presigner

Abstract base class for the AWS SigV4 signer implementations.

Field Summary

Fields

Modifier and Type	Field	Description
static String	EMPTY_STRING_SHA256_HEX

Constructor Summary

Constructors

Constructor	Description
AbstractAws4Signer()

Method Summary

Modifier and Type	Method	Description
protected void	addSessionCredentials(SdkHttpFullRequest.Builder mutableRequest, AwsSessionCredentials credentials)	Adds session credentials to the request given.
protected String	calculateContentHash(SdkHttpFullRequest.Builder mutableRequest, T signerParams)	Calculate the hash of the request's payload.
protected String	calculateContentHash(SdkHttpFullRequest.Builder mutableRequest, T signerParams, SdkChecksum contentFlexibleChecksum)	This method overloads calculateContentHash with contentFlexibleChecksum.
protected abstract String	calculateContentHashPresign(SdkHttpFullRequest.Builder mutableRequest, U signerParams)
protected byte[]	deriveSigningKey(AwsCredentials credentials, Instant signingInstant, String region, String service)
protected byte[]	deriveSigningKey(AwsCredentials credentials, Aws4SignerRequestParams signerRequestParams)	Step 3 of the AWS Signature version 4 calculation.
protected SdkHttpFullRequest.Builder	doPresign(SdkHttpFullRequest request, Aws4SignerRequestParams requestParams, U signingParams)
protected SdkHttpFullRequest.Builder	doSign(SdkHttpFullRequest request, Aws4SignerRequestParams requestParams, T signingParams)
protected SdkHttpFullRequest.Builder	doSign(SdkHttpFullRequest request, Aws4SignerRequestParams requestParams, T signingParams, ContentChecksum contentChecksum)
protected <B extends Aws4PresignerParams.Builder> B	extractPresignerParams(B builder, ExecutionAttributes executionAttributes)
protected <B extends Aws4SignerParams.Builder> B	extractSignerParams(B paramsBuilder, ExecutionAttributes executionAttributes)
protected abstract void	processRequestPayload(SdkHttpFullRequest.Builder mutableRequest, byte[] signature, byte[] signingKey, Aws4SignerRequestParams signerRequestParams, T signerParams)
protected abstract void	processRequestPayload(SdkHttpFullRequest.Builder mutableRequest, byte[] signature, byte[] signingKey, Aws4SignerRequestParams signerRequestParams, T signerParams, SdkChecksum sdkChecksum)

Methods inherited from class software.amazon.awssdk.auth.signer.internal.AbstractAwsSigner

getBinaryRequestPayloadStream, sanitizeCredentials, sign, sign, signAndBase64Encode, signWithMac

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface software.amazon.awssdk.core.signer.Presigner

presign

Methods inherited from interface software.amazon.awssdk.core.signer.Signer

credentialType, sign

Field Detail

EMPTY_STRING_SHA256_HEX

public static final String EMPTY_STRING_SHA256_HEX

Constructor Detail

AbstractAws4Signer

public AbstractAws4Signer()

Method Detail

doSign

protected SdkHttpFullRequest.Builder doSign(SdkHttpFullRequest request,
                                            Aws4SignerRequestParams requestParams,
                                            T signingParams)

doSign

protected SdkHttpFullRequest.Builder doSign(SdkHttpFullRequest request,
                                            Aws4SignerRequestParams requestParams,
                                            T signingParams,
                                            ContentChecksum contentChecksum)

doPresign

protected SdkHttpFullRequest.Builder doPresign(SdkHttpFullRequest request,
                                               Aws4SignerRequestParams requestParams,
                                               U signingParams)

addSessionCredentials

protected void addSessionCredentials(SdkHttpFullRequest.Builder mutableRequest,
                                     AwsSessionCredentials credentials)

Description copied from class: AbstractAwsSigner

Adds session credentials to the request given.

Specified by:

addSessionCredentials in class AbstractAwsSigner

Parameters:

mutableRequest - The request to add session credentials information to

credentials - The session credentials to add to the request

calculateContentHash

protected String calculateContentHash(SdkHttpFullRequest.Builder mutableRequest,
                                      T signerParams)

Calculate the hash of the request's payload. Subclass could override this method to provide different values for "x-amz-content-sha256" header or do any other necessary set-ups on the request headers. (e.g. aws-chunked uses a pre-defined header value, and needs to change some headers relating to content-encoding and content-length.)

calculateContentHash

protected String calculateContentHash(SdkHttpFullRequest.Builder mutableRequest,
                                      T signerParams,
                                      SdkChecksum contentFlexibleChecksum)

This method overloads calculateContentHash with contentFlexibleChecksum. The contentFlexibleChecksum is computed at the same time while hash is calculated for Content.

processRequestPayload

protected abstract void processRequestPayload(SdkHttpFullRequest.Builder mutableRequest,
                                              byte[] signature,
                                              byte[] signingKey,
                                              Aws4SignerRequestParams signerRequestParams,
                                              T signerParams)

processRequestPayload

protected abstract void processRequestPayload(SdkHttpFullRequest.Builder mutableRequest,
                                              byte[] signature,
                                              byte[] signingKey,
                                              Aws4SignerRequestParams signerRequestParams,
                                              T signerParams,
                                              SdkChecksum sdkChecksum)

calculateContentHashPresign

protected abstract String calculateContentHashPresign(SdkHttpFullRequest.Builder mutableRequest,
                                                      U signerParams)

deriveSigningKey

protected final byte[] deriveSigningKey(AwsCredentials credentials,
                                        Aws4SignerRequestParams signerRequestParams)

Step 3 of the AWS Signature version 4 calculation. It involves deriving the signing key and computing the signature. Refer to http://docs.aws.amazon .com/general/latest/gr/sigv4-calculate-signature.html

deriveSigningKey

protected final byte[] deriveSigningKey(AwsCredentials credentials,
                                        Instant signingInstant,
                                        String region,
                                        String service)

extractPresignerParams

protected <B extends Aws4PresignerParams.Builder> B extractPresignerParams(B builder,
                                                                           ExecutionAttributes executionAttributes)

extractSignerParams

protected <B extends Aws4SignerParams.Builder> B extractSignerParams(B paramsBuilder,
                                                                     ExecutionAttributes executionAttributes)