AwsS3V4ChunkSigner (AWS Java SDK :: Auth 2.37.3 API)

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 int SIGNATURE_LENGTH

Constructor Summary

Constructors
Constructor Description

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

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
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
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- SIGNATURE_LENGTH
```
public static final int SIGNATURE_LENGTH
```
  See Also:
  
  Constant Field Values

Constructor Detail

AwsS3V4ChunkSigner

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

Method Detail
- 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()
```