Class AwsS3V4ChunkSigner

java.lang.Object

software.amazon.awssdk.auth.signer.internal.chunkedencoding.AwsS3V4ChunkSigner

All Implemented Interfaces:

AwsChunkSigner

@SdkInternalApi
public class AwsS3V4ChunkSigner
extends Object
implements AwsChunkSigner

An implementation of AwsChunkSigner that can calculate a Sigv4 compatible chunk signature.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	SIGNATURE_LENGTH

Constructor Summary

Constructors

Constructor	Description
AwsS3V4ChunkSigner(byte[] signingKey, String datetime, String keyPath)

Method Summary

Modifier and Type	Method	Description
static int	getSignatureLength()
String	signChecksumChunk(byte[] calculatedChecksum, String previousSignature, String checksumHeaderForTrailer)	Signed chunk must be of below format signature = Hex(HMAC(K, "AWS4-HMAC-SHA256-TRAILER"\n DATE\n KEYPATH\n final_chunk_signature\n Hex(SHA256(canonicalize(trailing-headers)))))
String	signChunk(byte[] chunkData, String previousSignature)

Methods inherited from class java.lang.Object

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

Field Details

SIGNATURE_LENGTH

public static final int SIGNATURE_LENGTH

See Also:

• Constant Field Values

Constructor Details

AwsS3V4ChunkSigner

public AwsS3V4ChunkSigner(byte[] signingKey,
 String datetime,
 String keyPath)

Method Details

signChunk

public String signChunk(byte[] chunkData,
 String previousSignature)

Specified by:

signChunk in interface AwsChunkSigner

signChecksumChunk

public String signChecksumChunk(byte[] calculatedChecksum,
 String previousSignature,
 String checksumHeaderForTrailer)

Signed chunk must be of below format signature = Hex(HMAC(K, "AWS4-HMAC-SHA256-TRAILER"\n DATE\n KEYPATH\n final_chunk_signature\n Hex(SHA256(canonicalize(trailing-headers)))))

Specified by:

signChecksumChunk in interface AwsChunkSigner

Returns:

Signed Checksum in above signature format.

getSignatureLength

public static int getSignatureLength()