com.amazonaws.auth

Class AbstractAWSSigner

java.lang.Object

com.amazonaws.auth.AbstractAWSSigner

All Implemented Interfaces:

Signer

Direct Known Subclasses:

AWS3Signer, AWS4Signer, QueryStringSigner

public abstract class AbstractAWSSigner
extends java.lang.Object
implements Signer

Abstract base class for AWS signing protocol implementations. Provides utilities commonly needed by signing protocols such as computing canonicalized host names, query string parameters, etc.

Not intended to be sub-classed by developers.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	EMPTY_STRING_SHA256_HEX Empty sha256 hex.

Constructor Summary

Constructors

Constructor and Description
AbstractAWSSigner()

Method Summary

Modifier and Type	Method and Description
byte[]	hash(byte[] data) Hashes the binary data using the SHA-256 algorithm.
byte[]	hash(java.lang.String text) Hashes the string contents (assumed to be UTF-8) using the SHA-256 algorithm.
byte[]	sign(java.lang.String stringData, byte[] key, SigningAlgorithm algorithm) Signs using the given signing algorithm.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.amazonaws.auth.Signer

sign

Field Detail

EMPTY_STRING_SHA256_HEX

public static final java.lang.String EMPTY_STRING_SHA256_HEX

Empty sha256 hex.

Constructor Detail

AbstractAWSSigner

public AbstractAWSSigner()

Method Detail

sign

public byte[] sign(java.lang.String stringData,
                   byte[] key,
                   SigningAlgorithm algorithm)

Signs using the given signing algorithm.

Parameters:

stringData - the data.

key - the key in bytes.

algorithm - the signing algorithm.

Returns:

signed result in bytes.

hash

public byte[] hash(java.lang.String text)

Hashes the string contents (assumed to be UTF-8) using the SHA-256 algorithm.

Parameters:

text - The string to hash.

Returns:

The hashed bytes from the specified string.

hash

public byte[] hash(byte[] data)

Hashes the binary data using the SHA-256 algorithm.

Parameters:

data - The binary data to hash.

Returns:

The hashed bytes from the specified data.

Throws:

AmazonClientException - If the hash cannot be computed.