Dropped Nimbus Error Message

Closes gh-13730

Author: Caguilar92

oauth2/oauth2-jose/src/main/java/org/springframework/security/oauth2/jwt/NimbusJwtDecoder.java

@@ -144,6 +144,9 @@ private JWT parse(String token) {
 		}
 		catch (Exception ex) {
 			this.logger.trace("Failed to parse token", ex);
+			if (ex instanceof ParseException) {
+				throw new BadJwtException(String.format(DECODING_ERROR_MESSAGE_TEMPLATE, "Malformed token"), ex);
+			}
 			throw new BadJwtException(String.format(DECODING_ERROR_MESSAGE_TEMPLATE, ex.getMessage()), ex);
 		}
 	}

oauth2/oauth2-jose/src/test/java/org/springframework/security/oauth2/jwt/NimbusJwtDecoderTests.java

@@ -97,6 +97,8 @@
  */
 public class NimbusJwtDecoderTests {
 
+	private static final String MALFORMED_TOKEN = "eyJhbGciOiJSUzI1NiJ9.eyJuYmYiOnt9LCJleHAiOjQ2ODQyMjUwODd9";
+
 	private static final String JWK_SET = "{\"keys\":[{\"p\":\"49neceJFs8R6n7WamRGy45F5Tv0YM-R2ODK3eSBUSLOSH2tAqjEVKOkLE5fiNA3ygqq15NcKRadB2pTVf-Yb5ZIBuKzko8bzYIkIqYhSh_FAdEEr0vHF5fq_yWSvc6swsOJGqvBEtuqtJY027u-G2gAQasCQdhyejer68zsTn8M\",\"kty\":\"RSA\",\"q\":\"tWR-ysspjZ73B6p2vVRVyHwP3KQWL5KEQcdgcmMOE_P_cPs98vZJfLhxobXVmvzuEWBpRSiqiuyKlQnpstKt94Cy77iO8m8ISfF3C9VyLWXi9HUGAJb99irWABFl3sNDff5K2ODQ8CmuXLYM25OwN3ikbrhEJozlXg_NJFSGD4E\",\"d\":\"FkZHYZlw5KSoqQ1i2RA2kCUygSUOf1OqMt3uomtXuUmqKBm_bY7PCOhmwbvbn4xZYEeHuTR8Xix-0KpHe3NKyWrtRjkq1T_un49_1LLVUhJ0dL-9_x0xRquVjhl_XrsRXaGMEHs8G9pLTvXQ1uST585gxIfmCe0sxPZLvwoic-bXf64UZ9BGRV3lFexWJQqCZp2S21HfoU7wiz6kfLRNi-K4xiVNB1gswm_8o5lRuY7zB9bRARQ3TS2G4eW7p5sxT3CgsGiQD3_wPugU8iDplqAjgJ5ofNJXZezoj0t6JMB_qOpbrmAM1EnomIPebSLW7Ky9SugEd6KMdL5lW6AuAQ\",\"e\":\"AQAB\",\"use\":\"sig\",\"kid\":\"one\",\"qi\":\"wdkFu_tV2V1l_PWUUimG516Zvhqk2SWDw1F7uNDD-Lvrv_WNRIJVzuffZ8WYiPy8VvYQPJUrT2EXL8P0ocqwlaSTuXctrORcbjwgxDQDLsiZE0C23HYzgi0cofbScsJdhcBg7d07LAf7cdJWG0YVl1FkMCsxUlZ2wTwHfKWf-v4\",\"dp\":\"uwnPxqC-IxG4r33-SIT02kZC1IqC4aY7PWq0nePiDEQMQWpjjNH50rlq9EyLzbtdRdIouo-jyQXB01K15-XXJJ60dwrGLYNVqfsTd0eGqD1scYJGHUWG9IDgCsxyEnuG3s0AwbW2UolWVSsU2xMZGb9PurIUZECeD1XDZwMp2s0\",\"dq\":\"hra786AunB8TF35h8PpROzPoE9VJJMuLrc6Esm8eZXMwopf0yhxfN2FEAvUoTpLJu93-UH6DKenCgi16gnQ0_zt1qNNIVoRfg4rw_rjmsxCYHTVL3-RDeC8X_7TsEySxW0EgFTHh-nr6I6CQrAJjPM88T35KHtdFATZ7BCBB8AE\",\"n\":\"oXJ8OyOv_eRnce4akdanR4KYRfnC2zLV4uYNQpcFn6oHL0dj7D6kxQmsXoYgJV8ZVDn71KGmuLvolxsDncc2UrhyMBY6DVQVgMSVYaPCTgW76iYEKGgzTEw5IBRQL9w3SRJWd3VJTZZQjkXef48Ocz06PGF3lhbz4t5UEZtdF4rIe7u-977QwHuh7yRPBQ3sII-cVoOUMgaXB9SHcGF2iZCtPzL_IffDUcfhLQteGebhW8A6eUHgpD5A1PQ-JCw_G7UOzZAjjDjtNM2eqm8j-Ms_gqnm4MiCZ4E-9pDN77CAAPVN7kuX6ejs9KBXpk01z48i9fORYk9u7rAkh1HuQw\"}]}";
 
 	private static final String NEW_KID_JWK_SET = "{\"keys\":[{\"kty\":\"RSA\",\"e\":\"AQAB\",\"kid\":\"two\",\"n\":\"ra9UJw4I0fCHuOqr1xWJsh-qcVeZWtKEU3uoqq1sAg5fG67dujNCm_Q16yuO0ZdDiU0vlJkbc_MXFAvm4ZxdJ_qR7PAneV-BOGNtLpSaiPclscCy3m7zjRWkaqwt9ZZEsdK5UqXyPlBpcYhNKsmnQGjnX4sYb7d8b2jSCM_qto48-6451rbyEhXXywtFy_JqtTpbsw_IIdQHMr1O-MdSjsQxX9kkvZwPU8LsC-CcqlcsZ7mnpOhmIXaf4tbRwAaluXwYft0yykFsp8e5C4t9mMs9Vu8AB5gT8o-D_ovXd2qh4k3ejzVpYLtzD4nbfvPJA_TXmjhn-9GOPAqkzfON2Q\"}]}";
@@ -194,6 +196,12 @@ public void decodeWhenJwtIsMalformedThenReturnsStockException() {
 		// @formatter:on
 	}
 
+	@Test
+	public void decodeWhenTokenMalformedThenReturnsMalformedTokenMessage() {
+		assertThatExceptionOfType(BadJwtException.class).isThrownBy(() -> this.jwtDecoder.decode(MALFORMED_TOKEN))
+			.withMessage("An error occurred while attempting to decode the Jwt: Malformed token");
+	}
+
 	@Test
 	public void decodeWhenJwtFailsValidationThenReturnsCorrespondingErrorMessage() {
 		OAuth2Error failure = new OAuth2Error("mock-error", "mock-description", "mock-uri");