Amazon Pay API SDK (Java) 2.5.1

Author: Shangamesh T

CHANGES.md

@@ -1,3 +1,7 @@
+#### Version 2.5.1 - January 2022
+* Applied patch to address issues occurred in Version 2.5.0.
+* **Please dont use Version 2.5.0**
+
 #### Version 2.5.0 - January 2022
 * Migrated signature generating algorithm from AMZN-PAY-RSASSA-PSS to AMZN-PAY-RSASSA-PSS-V2 & increased salt length from 20 to 32
 * Note : From this SDK version, "algorithm" need to be provided as additional field in "createCheckoutSessionConfig" while rendering Amazon Pay button.

README.md

@@ -17,15 +17,15 @@ To use the SDK in a Maven project, add a <dependency> reference in your pom.xml
     <dependency>
         <groupId>software.amazon.pay</groupId>
         <artifactId>amazon-pay-api-sdk-java</artifactId>
-        <version>2.5.0</version>
+        <version>2.5.1</version>
     </dependency>
 </dependencies>
 ```
 
 To use the SDK in a Gradle project, add the following line to your build.gradle file::
 
 ```
-implementation 'software.amazon.pay:amazon-pay-api-sdk-java:2.5.0'
+implementation 'software.amazon.pay:amazon-pay-api-sdk-java:2.5.1'
 ```
 
 For legacy projects, you can just grab the binary [jar file](https://github.com/amzn/amazon-pay-api-sdk-java/releases) from the GitHub Releases page.
@@ -605,17 +605,6 @@ Or, if you want to use a JSONObject:
 
         String signature = client.generateButtonSignature(payload);
 ```
-Note : 
-As part of signature button integration, "algorithm" need to be provided as additional field in "createCheckoutSessionConfig" while rendering Amazon Pay button.
-  		  
-Example of "createCheckoutSessionConfig" :
-``` js
-  		createCheckoutSessionConfig: {           
-  		payloadJSON: '{"webCheckoutDetails":{"checkoutReviewReturnUrl":"https://localhost/test/checkoutReview.html"},"storeId": "amzn1.application-oa2-client.xxxxx","scopes": ["name", "email", "phoneNumber", "billingAddress"]}',
-  		signature: 'SIGNATURE', // Signature Obtained by calling "generateButtonSignature(payload)" method
-  		algorithm: 'AMZN-PAY-RSASSA-PSS-V2' // This Parameter is mandatory
-  	}
-```
 
 ## In-Store API
 Please contact your Amazon Pay Account Manager before using the In-Store API calls in a Production environment to obtain a copy of the In-Store Integration Guide.

pom.xml

@@ -5,7 +5,7 @@
     <groupId>software.amazon.pay</groupId>
     <artifactId>amazon-pay-api-sdk-java</artifactId>
     <packaging>jar</packaging>
-    <version>2.5.0</version>
+    <version>2.5.1</version>
     <dependencies>
        <!-- https://mvnrepository.com/artifact/org.json/json -->
 		<dependency>

src/com/amazon/pay/api/ServiceConstants.java

@@ -26,11 +26,11 @@ public class ServiceConstants {
     public static final Map<Region, String> endpointMappings;
     public static final Map<String, Integer> serviceErrors;
 
-    public static final String APPLICATION_LIBRARY_VERSION = "2.5.0";
+    public static final String APPLICATION_LIBRARY_VERSION = "2.5.1";
     public static final String GITHUB_SDK_NAME = "amazon-pay-api-sdk-java";
     public static final String AMAZON_PAY_API_VERSION = "v2";
 
-    public static final String AMAZON_SIGNATURE_ALGORITHM = "AMZN-PAY-RSASSA-PSS-V2";
+    public static final String AMAZON_SIGNATURE_ALGORITHM = "AMZN-PAY-RSASSA-PSS";
     public static final String HASH_ALGORITHM = "SHA-256";
     public static final String SIGNATURE_ALGORITHM = "SHA256WithRSA/PSS";
     public static final String MASK_GENERATION_FUNCTION = "MGF1";

src/com/amazon/pay/api/SignatureHelper.java

@@ -42,7 +42,7 @@
 public class SignatureHelper {
     private final PayConfiguration payConfiguration;
     private final String LINE_SEPARATOR = "\n";
-    public final static int SALT_LENGTH = 32;
+    public final static int SALT_LENGTH = 20;
     public final static int TRAILER_FIELD = 1;
 
     public SignatureHelper(final PayConfiguration payConfiguration) {

tst/com/amazon/pay/api/GenerateButtonSignatureTest.java

@@ -42,7 +42,7 @@ public class GenerateButtonSignatureTest {
     private WebstoreClient client;
     private Signature signature;
 
-    private static final String PLAIN_TEXT = ServiceConstants.AMAZON_SIGNATURE_ALGORITHM + "\n8dec52d799607be40f82d5c8e7ecb6c171e6591c41b1111a576b16076c89381c";
+    private static final String PLAIN_TEXT = "AMZN-PAY-RSASSA-PSS\n8dec52d799607be40f82d5c8e7ecb6c171e6591c41b1111a576b16076c89381c";
 
     @Before
     public void setUp() throws Exception {

tst/com/amazon/pay/api/RequestSignerTest.java

@@ -80,14 +80,14 @@ private void setUpMockValues() throws Exception {
                 "accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\n" +
                 "81dd99309152d21f2cef921656d3f57830fe9c36fe193af1b62de504e806aceb";
 
-        stringToSign = ServiceConstants.AMAZON_SIGNATURE_ALGORITHM + "\n" +
+        stringToSign = "AMZN-PAY-RSASSA-PSS\n" +
                 "227f8d4a6974e65a62ebe6648fab8666fe25f10dc2ec41fba9c439e633ba4b94";
 
         signature = "c062NjivoUW+TcHegKebFamCX8Cpmpmy6EiPmKwdpEuZZIpOHJYO";
 
         signedHeaderString = "accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region";
 
-        authorizationHeader = ServiceConstants.AMAZON_SIGNATURE_ALGORITHM + " PublicKeyId=ADGUHQIH9988, SignedHeaders=accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region, Signature=c062NjivoUW+TcHegKebFamCX8Cpmpmy6EiPmKwdpEuZZIpOHJYO";
+        authorizationHeader = "AMZN-PAY-RSASSA-PSS PublicKeyId=ADGUHQIH9988, SignedHeaders=accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region, Signature=c062NjivoUW+TcHegKebFamCX8Cpmpmy6EiPmKwdpEuZZIpOHJYO";
 
         headers = new HashMap<>();
         List<String> acceptHeaderValue = new ArrayList<>();

tst/com/amazon/pay/api/RequestSignerWithHeaderTest.java

@@ -85,14 +85,14 @@ private void setUpMockValues() throws Exception {
                 "accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-idempotency-key;x-amz-pay-region\n" +
                 "81dd99309152d21f2cef921656d3f57830fe9c36fe193af1b62de504e806aceb";
 
-        stringToSign = ServiceConstants.AMAZON_SIGNATURE_ALGORITHM + "\n" +
+        stringToSign = "AMZN-PAY-RSASSA-PSS\n" +
                 "15322736b7e5a9056411168d070b1f3dcc289c46890692c06f07c62d3ef0721d";
 
         signature = "BsnrBn7R4QvpWqPzElKnxK8KLm7BzglICqRsWDcj7okwVpHrpZnoOm4D3v2+naryg2vIzP2iIWvscNm3MbX7vR3nClgcB+vVUQZLEu9yg0IJA4QCiybh9etgLHSRv2jwR9ByFe9U5FMdhr7omDG3Q1lAjvvxiPHt9UtL3h1LJ7rirOuQUWp/zL5QDWsIvTty3zEKksdRJuPeCGwijwo0LPuIf2plZGv9TJ5CJBxssw3+phj5Nvo9HWuzFRkJsC1jgknO0+eSTSn5RM6R2Px0mkz3qbd5ZpSX3tIoK937vkmNZALNm/euqYnIKjviGVuSEDo1ite84foCvSqpTmiVrg==";
 
         signedHeaderString = "accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-idempotency-key;x-amz-pay-region";
 
-        authorizationHeader = ServiceConstants.AMAZON_SIGNATURE_ALGORITHM + " PublicKeyId=ADGUHQIH9988, SignedHeaders=accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-idempotency-key;x-amz-pay-region, Signature=BsnrBn7R4QvpWqPzElKnxK8KLm7BzglICqRsWDcj7okwVpHrpZnoOm4D3v2+naryg2vIzP2iIWvscNm3MbX7vR3nClgcB+vVUQZLEu9yg0IJA4QCiybh9etgLHSRv2jwR9ByFe9U5FMdhr7omDG3Q1lAjvvxiPHt9UtL3h1LJ7rirOuQUWp/zL5QDWsIvTty3zEKksdRJuPeCGwijwo0LPuIf2plZGv9TJ5CJBxssw3+phj5Nvo9HWuzFRkJsC1jgknO0+eSTSn5RM6R2Px0mkz3qbd5ZpSX3tIoK937vkmNZALNm/euqYnIKjviGVuSEDo1ite84foCvSqpTmiVrg==";
+        authorizationHeader = "AMZN-PAY-RSASSA-PSS PublicKeyId=ADGUHQIH9988, SignedHeaders=accept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-idempotency-key;x-amz-pay-region, Signature=BsnrBn7R4QvpWqPzElKnxK8KLm7BzglICqRsWDcj7okwVpHrpZnoOm4D3v2+naryg2vIzP2iIWvscNm3MbX7vR3nClgcB+vVUQZLEu9yg0IJA4QCiybh9etgLHSRv2jwR9ByFe9U5FMdhr7omDG3Q1lAjvvxiPHt9UtL3h1LJ7rirOuQUWp/zL5QDWsIvTty3zEKksdRJuPeCGwijwo0LPuIf2plZGv9TJ5CJBxssw3+phj5Nvo9HWuzFRkJsC1jgknO0+eSTSn5RM6R2Px0mkz3qbd5ZpSX3tIoK937vkmNZALNm/euqYnIKjviGVuSEDo1ite84foCvSqpTmiVrg==";
 
         headers = new HashMap<>();
         List<String> acceptHeaderValue = new ArrayList<>();

tst/com/amazon/pay/api/SignatureHelperTest.java

@@ -58,7 +58,7 @@ public void createStringToSign() throws Exception {
         PowerMockito.when(spy, method(SignatureHelper.class, "hashThenHexEncode")).withArguments(canonicalRequest).thenReturn("95b0d65e9efb9f0b9e8c2f3b77");
 
         String stringToSign = spy.createStringToSign(canonicalRequest);
-        String expectedString = ServiceConstants.AMAZON_SIGNATURE_ALGORITHM + "\n" + "95b0d65e9efb9f0b9e8c2f3b77";
+        String expectedString = "AMZN-PAY-RSASSA-PSS" + "\n" + "95b0d65e9efb9f0b9e8c2f3b77";
 
         Assert.assertEquals(stringToSign, expectedString);
     }

tst/com/amazon/pay/api/testdata.js

@@ -6,7 +6,7 @@
       "parameters" : {},
       "payload" : "",
       "canonicalRequest" : "GET\n/\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
     },
 
     {
@@ -16,7 +16,7 @@
       "parameters" : {},
       "payload" : "",
       "canonicalRequest" : "GET\n/\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
     },
 
     {
@@ -26,7 +26,7 @@
       "parameters" : {},
       "payload" : "",
       "canonicalRequest" : "GET\n/\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
     },
 
     {
@@ -36,18 +36,18 @@
       "parameters" : {},
       "payload" : "",
       "canonicalRequest" : "GET\n/-._~0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\na0e5dd63e175587f29d51c6b08be5c746a568209ac66ab1f967e0ba515aa80bc"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\na0e5dd63e175587f29d51c6b08be5c746a568209ac66ab1f967e0ba515aa80bc"
     },
 
     {
       "name" : "get-vanilla-query",
       "uri" : "/",
       "method" : "GET",
       "parameters" : {},
-      "algorithm" : "AMZN-PAY-RSASSA-PSS-V2",
+      "algorithm" : "AMZN-PAY-RSASSA-PSS",
       "payload" : "",
       "canonicalRequest" : "GET\n/\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\nbb49552975c396f1e49d5510e1555b8b0627dc491bc61aaefdb561f202ad8020"
     },
 
     {
@@ -57,7 +57,7 @@
       "parameters" : {},
       "payload" : "",
       "canonicalRequest" : "GET\n/%E1%88%B4\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n77f6544c8fb336d430895659da1e30415a1558b4b013f4d7926bb3a6275f701d"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n77f6544c8fb336d430895659da1e30415a1558b4b013f4d7926bb3a6275f701d"
 
     },
 
@@ -70,7 +70,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\n%E1%88%B4=bar\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\nef1007307504f2ca9f0b6310b04056f5d3d6d18e7bf3d90663133f19ec132ecc"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\nef1007307504f2ca9f0b6310b04056f5d3d6d18e7bf3d90663133f19ec132ecc"
     },
 
     {
@@ -80,7 +80,7 @@
       "parameters" : {},
       "payload" : "",
       "canonicalRequest" : "POST\n/\n\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n54156f5badd6da7fa630b2c334c808ad376530001d334ae9960457215aa626d3"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n54156f5badd6da7fa630b2c334c808ad376530001d334ae9960457215aa626d3"
     },
 
     {
@@ -92,7 +92,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "POST\n/\nfoo=bar\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\ncc82525870b2d03666c287fd8b2c0d2fc6fa1693d9f357d27f7cac8cbcc12832"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\ncc82525870b2d03666c287fd8b2c0d2fc6fa1693d9f357d27f7cac8cbcc12832"
     },
 
     {
@@ -104,7 +104,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\nfoo=bar\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n6837f80baf1801c75db8119cffbadc26a89d20adb9cf3f3de4ce0fac31b4ae52"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n6837f80baf1801c75db8119cffbadc26a89d20adb9cf3f3de4ce0fac31b4ae52"
     },
 
     {
@@ -116,7 +116,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\nfoo=a&foo=b\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\na33266ec31c7f0ca8a0738eb49fb8c81319f14374a0b86d52e6911a9748a6d42"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\na33266ec31c7f0ca8a0738eb49fb8c81319f14374a0b86d52e6911a9748a6d42"
     },
 
     {
@@ -129,7 +129,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\na=foo&b=foo\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n6615ba7ca3734e97b35013f77c74d111ce2fa63ab52be161ad41bcd4b010120f"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n6615ba7ca3734e97b35013f77c74d111ce2fa63ab52be161ad41bcd4b010120f"
     },
 
     {
@@ -143,7 +143,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\nA.1=foo&A.10=foo&A.2=foo\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n29d908d70c4bb50d62272976787245b52ed52e569fdae56ef3aa6d8979978ee7"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n29d908d70c4bb50d62272976787245b52ed52e569fdae56ef3aa6d8979978ee7"
     },
 
     {
@@ -155,7 +155,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\nfoo=Zoo&foo=aha\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\nf379cbd2e2fc9d5d50667a07ec22996335f731b474bb8bd366647d05d958c9d5"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\nf379cbd2e2fc9d5d50667a07ec22996335f731b474bb8bd366647d05d958c9d5"
     },
 
     {
@@ -167,7 +167,7 @@
       },
       "payload" : "",
       "canonicalRequest" : "GET\n/\n-._~0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz=-._~0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n892abddd6e79db3feb5695b318af639c3e863494f6b4df32ec24fff4c1562a73"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n892abddd6e79db3feb5695b318af639c3e863494f6b4df32ec24fff4c1562a73"
     },
 
     {
@@ -177,10 +177,10 @@
       "parameters" : {
           "@#$%^&+=/,?><`\";:\\|][{} " : [ "@#$%^&+=/,?><`\";:\\|][{} " ]
       },
-      "algorithm" : "AMZN-PAY-RSASSA-PSS-V2",
+      "algorithm" : "AMZN-PAY-RSASSA-PSS",
       "payload" : "",
       "canonicalRequest" : "POST\n/\n%40%23%24%25%5E%26%2B%3D%2F%2C%3F%3E%3C%60%22%3B%3A%5C%7C%5D%5B%7B%7D%20=%40%23%24%25%5E%26%2B%3D%2F%2C%3F%3E%3C%60%22%3B%3A%5C%7C%5D%5B%7B%7D%20\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n66bbbf2b5d6d297a9393abbc0b4f9d62e30666bb0ec0dea8f1d4e45551440e4c"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n66bbbf2b5d6d297a9393abbc0b4f9d62e30666bb0ec0dea8f1d4e45551440e4c"
     },
 
     {
@@ -192,6 +192,6 @@
       },
       "payload" : "",
       "canonicalRequest" : "POST\n/\nf%20oo=b%20ar\naccept:application/json\ncontent-type:application/json\nx-amz-pay-date:20180524T223710Z\nx-amz-pay-host:pay-api.amazon.eu\nx-amz-pay-region:EU\n\naccept;content-type;x-amz-pay-date;x-amz-pay-host;x-amz-pay-region\ne3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
-      "stringToSign" : "AMZN-PAY-RSASSA-PSS-V2\n99be3aeb19b5a1aebafc807d59f3740d3e604ae31cf928592fa70739ea64bb32"
+      "stringToSign" : "AMZN-PAY-RSASSA-PSS\n99be3aeb19b5a1aebafc807d59f3740d3e604ae31cf928592fa70739ea64bb32"
     },
  ]