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...crt/src/main/java/software/amazon/awssdk/crt/io/TlsAndroidPrivateKeyOperationHandler.java
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/** | ||
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved. | ||
* SPDX-License-Identifier: Apache-2.0. | ||
*/ | ||
package software.amazon.awssdk.crt.io; | ||
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import java.security.PrivateKey; | ||
import java.security.Signature; | ||
import java.io.ByteArrayOutputStream; | ||
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/* | ||
* TlsKeyOperationHandler implementation for using an Android PrivateKey on TlsKeyOperations | ||
*/ | ||
public class TlsAndroidPrivateKeyOperationHandler implements TlsKeyOperationHandler { | ||
private PrivateKey privateKey; | ||
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/* | ||
* DER encoded DigestInfo value to be prefixed to the hash, used for RSA signing | ||
* See https://tools.ietf.org/html/rfc3447#page-43 | ||
*/ | ||
static byte[] sha1PrefixToRsaSig = { (byte)0x30, (byte)0x21, (byte)0x30, (byte)0x09, (byte)0x06, (byte)0x05, (byte)0x2b, (byte)0x0e, (byte)0x03, (byte)0x02, (byte)0x1a, (byte)0x05, (byte)0x00, (byte)0x04, (byte)0x14 }; | ||
static byte[] sha224PrefixToRsaSig = { (byte)0x30, (byte)0x2d, (byte)0x30, (byte)0x0d, (byte)0x06, (byte)0x09, (byte)0x60, (byte)0x86, (byte)0x48, (byte)0x01, (byte)0x65, (byte)0x03, (byte)0x04, (byte)0x02, (byte)0x04, (byte)0x05, (byte)0x00, (byte)0x04, (byte)0x1c }; | ||
static byte[] sha256PrefixToRsaSig = { (byte)0x30, (byte)0x31, (byte)0x30, (byte)0x0d, (byte)0x06, (byte)0x09, (byte)0x60, (byte)0x86, (byte)0x48, (byte)0x01, (byte)0x65, (byte)0x03, (byte)0x04, (byte)0x02, (byte)0x01, (byte)0x05, (byte)0x00, (byte)0x04, (byte)0x20 }; | ||
static byte[] sha384PrefixToRsaSig = { (byte)0x30, (byte)0x41, (byte)0x30, (byte)0x0d, (byte)0x06, (byte)0x09, (byte)0x60, (byte)0x86, (byte)0x48, (byte)0x01, (byte)0x65, (byte)0x03, (byte)0x04, (byte)0x02, (byte)0x02, (byte)0x05, (byte)0x00, (byte)0x04, (byte)0x30 }; | ||
static byte[] sha512PrefixToRsaSig = { (byte)0x30, (byte)0x51, (byte)0x30, (byte)0x0d, (byte)0x06, (byte)0x09, (byte)0x60, (byte)0x86, (byte)0x48, (byte)0x01, (byte)0x65, (byte)0x03, (byte)0x04, (byte)0x02, (byte)0x03, (byte)0x05, (byte)0x00, (byte)0x04, (byte)0x40 }; | ||
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public TlsAndroidPrivateKeyOperationHandler(PrivateKey privateKey) { | ||
this.privateKey = privateKey; | ||
} | ||
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public void performOperation(TlsKeyOperation operation){ | ||
try{ | ||
if (operation.getType() != TlsKeyOperation.Type.SIGN) { | ||
operation.completeExceptionally(new Throwable("Android KeyChain PrivateKey only handles SIGN operations.")); | ||
return; | ||
} | ||
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// A SIGN operation's inputData is the 32bytes of the SHA-256 digest. | ||
// Before doing the RSA signature, we need to construct a PKCS1 v1.5 DigestInfo. | ||
// See https://datatracker.ietf.org/doc/html/rfc3447#section-9.2 | ||
byte[] dataToSign = operation.getInput(); | ||
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Signature signature = Signature.getInstance("NONEwith" + operation.getSignatureAlgorithm().name());; | ||
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switch(operation.getSignatureAlgorithm()){ | ||
case RSA: | ||
/* | ||
* DER encoded DigestInfo value to be prefixed to the hash, used for RSA signing | ||
* See https://tools.ietf.org/html/rfc3447#page-43 | ||
*/ | ||
byte[] digestAlgorithm; | ||
switch(operation.getDigestAlgorithm()){ | ||
case SHA1: | ||
digestAlgorithm = sha1PrefixToRsaSig; | ||
break; | ||
case SHA224: | ||
digestAlgorithm = sha224PrefixToRsaSig; | ||
break; | ||
case SHA256: | ||
digestAlgorithm = sha256PrefixToRsaSig; | ||
break; | ||
case SHA384: | ||
digestAlgorithm = sha384PrefixToRsaSig; | ||
break; | ||
case SHA512: | ||
digestAlgorithm = sha512PrefixToRsaSig; | ||
break; | ||
case UNKNOWN: | ||
default: | ||
operation.completeExceptionally(new Throwable("An UNKNOWN digest algorithm was encountered during a SIGN operation against an Android KeyChain PrivateKey.")); | ||
return; | ||
} | ||
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ByteArrayOutputStream digestInfoStream = new ByteArrayOutputStream(); | ||
digestInfoStream.write(digestAlgorithm); | ||
digestInfoStream.write(dataToSign); | ||
byte[] digestInfo = digestInfoStream.toByteArray(); | ||
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signature.initSign(privateKey); | ||
signature.update(digestInfo); | ||
byte[] signatureBytesRSA = signature.sign(); | ||
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operation.complete(signatureBytesRSA); | ||
return; | ||
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case ECDSA: | ||
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signature.initSign(privateKey); | ||
signature.update(dataToSign); | ||
byte[] signatureBytesECC = signature.sign(); | ||
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operation.complete(signatureBytesECC); | ||
return; | ||
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case UNKNOWN: | ||
default: | ||
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operation.completeExceptionally(new Throwable("An UNKNOWN signature algorithm was encountered during a SIGN operation against an Android KeyChain PrivateKey.")); | ||
return; | ||
} | ||
} catch (Exception ex){ | ||
operation.completeExceptionally(new Throwable("Exception caught during Android KeyChain PrivateKey operation.", ex)); | ||
} | ||
} | ||
} |
Submodule s2n
updated
from 54fbc3 to c74f44
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