Remove all newlines in PKCS7 from EC2MetaData.

Closes gh-571.

Author: mp911de

spring-vault-core/src/main/java/org/springframework/vault/authentication/AwsEc2Authentication.java

@@ -110,7 +110,7 @@ protected static AuthenticationSteps createAuthenticationSteps(AwsEc2Authenticat
 		return AuthenticationSteps
 				.fromHttpRequest(HttpRequestBuilder.get(options.getIdentityDocumentUri().toString()).as(String.class)) //
 				.map(pkcs7 -> pkcs7.replaceAll("\\r", "")) //
-				.map(pkcs7 -> pkcs7.replace("\\n", "")) //
+				.map(pkcs7 -> pkcs7.replaceAll("\\n", "")) //
 				.map(pkcs7 -> {
 
 					Map<String, String> login = new HashMap<>();
@@ -189,7 +189,7 @@ protected Map<String, String> getEc2Login() {
 			String pkcs7 = this.awsMetadataRestOperations.getForObject(this.options.getIdentityDocumentUri(),
 					String.class);
 			if (StringUtils.hasText(pkcs7)) {
-				login.put("pkcs7", pkcs7.replaceAll("\\r", "").replace("\\n", ""));
+				login.put("pkcs7", pkcs7.replaceAll("\\r", "").replaceAll("\\n", ""));
 			}
 
 			return login;

spring-vault-core/src/test/java/org/springframework/vault/authentication/AwsEc2AuthenticationUnitTests.java

@@ -73,6 +73,18 @@ void shouldObtainIdentityDocument() {
 		assertThat(authentication.getEc2Login()).containsEntry("pkcs7", "Hello, world").containsKey("nonce").hasSize(2);
 	}
 
+	@Test
+	void shouldCleanUpIdentityResponse() {
+
+		this.mockRest.expect(requestTo("http://169.254.169.254/latest/dynamic/instance-identity/pkcs7")) //
+				.andExpect(method(HttpMethod.GET)) //
+				.andRespond(withSuccess().body("Hello, \r\r\n\nworld"));
+
+		AwsEc2Authentication authentication = new AwsEc2Authentication(this.restTemplate);
+
+		assertThat(authentication.getEc2Login()).containsEntry("pkcs7", "Hello, world");
+	}
+
 	@Test
 	void shouldContainRole() {