Correct typos and error in all comments of the PR

extensions/guacamole-auth-sso/modules/guacamole-auth-sso-openid/src/main/java/org/apache/guacamole/auth/openid/conf/ConfigurationService.java

@@ -339,7 +339,8 @@ public class ConfigurationService {
      *     guacamole.properties.
      *
      * @throws GuacamoleException
-     *     endpoint property is missing.
+     *     If guacamole.properties cannot be parsed, or it authorization and
+     *     well-known endpoints are property is missing.
      */
     public URI getAuthorizationEndpoint() throws GuacamoleException {
         URI authorization_endpoint = environment.getProperty(OPENID_AUTHORIZATION_ENDPOINT);
@@ -396,7 +397,7 @@ public class ConfigurationService {
      *
      * @throws GuacamoleException
      *     If guacamole.properties cannot be parsed, or if the issuer property
-     *     is missing.
+     *     and well-known endpoints are property is missing.
      */
     public String getIssuer() throws GuacamoleException {
         String issuer = environment.getProperty(OPENID_ISSUER);
@@ -418,8 +419,8 @@ public class ConfigurationService {
      *     guacamole.properties.
      *
      * @throws GuacamoleException
-     *     If guacamole.properties cannot be parsed, or if the JWKS endpoint
+     *     If guacamole.properties cannot be parsed, or if the JWKS and
-     *     property is missing.
+     *     well-known endpoints are property is missing.
      */
     public URI getJWKSEndpoint() throws GuacamoleException {
         URI jwks_uri =  environment.getProperty(OPENID_JWKS_ENDPOINT);
@@ -439,8 +440,8 @@ public class ConfigurationService {
      *     guacamole.properties.
      *
      * @throws GuacamoleException
-     *     If guacamole.properties cannot be parsed, or if the token
+     *     If guacamole.properties cannot be parsed, or if the token and
-     *     endpoint property is missing.
+     *     well-known endpoints are property is missing.
      */
     public URI getTokenEndpoint() throws GuacamoleException {
         URI token_endpoint = environment.getProperty(OPENID_TOKEN_ENDPOINT);
@@ -490,8 +491,7 @@ public class ConfigurationService {
      *     as configured with guacamole.properties.
      *
      * @throws GuacamoleException
-     *     If guacamole.properties cannot be parsed, or if the client ID
+     *     If guacamole.properties cannot be parsed.
-     *     property is missing.
      */
     public String getClientSecret() throws GuacamoleException {
        return environment.getProperty(OPENID_CLIENT_SECRET);

extensions/guacamole-auth-sso/modules/guacamole-auth-sso-openid/src/main/java/org/apache/guacamole/auth/openid/conf/OpenIDWellKnown.java

@@ -65,12 +65,12 @@ public class OpenIDWellKnown {
     private static String issuer = null;
 
     /**
-     * The detected authorization edpoint
+     * The detected authorization endpoint
      */
     private static URI authorization_endpoint = null;
 
     /**
-     * The detected token edpoint
+     * The detected token endpoint
      */
     private static URI token_endpoint = null;
 
@@ -104,7 +104,7 @@ public class OpenIDWellKnown {
      *     guacamole.properties.
      *
      * @throws GuacamoleException
-     *     If guacamole.properties cannot be parsed, or if the authorization
+     *     If guacamole.properties cannot be parsed, or if the well-known
      *     endpoint property is missing.
      */
     private URI getWellKnownEndpoint() throws GuacamoleException {

extensions/guacamole-auth-sso/modules/guacamole-auth-sso-openid/src/main/java/org/apache/guacamole/auth/openid/util/JsonUrlReader.java

@@ -53,7 +53,7 @@ public final class JsonUrlReader {
      * Method to POST or GET to a URL and recover the JSON in the form of a Map
      *
      * @param String method
-     *      The htpp method to use. Should be "GET", "POST" or "PATCH".
+     *      The http method to use. Should be "GET", "POST" or "PATCH".
      *
      * @param URI uri
      *      A URI value giving the address where to recover the JSON

extensions/guacamole-auth-sso/modules/guacamole-auth-sso-openid/src/main/java/org/apache/guacamole/auth/openid/util/PKCEUtil.java

@@ -31,7 +31,7 @@ import java.security.SecureRandom;
  */
 public final class PKCEUtil {
     /**
-     * Get the verifier data from a secure random source
+     * Get the verifier data from a cryptographically secure random source
      */
     private static final SecureRandom RANDOM = new SecureRandom();
 
@@ -56,7 +56,7 @@ public final class PKCEUtil {
      * Computes the PKCE code_challenge = BASE64URL(SHA256(code_verifier)).
      *
      * @param String verifier
-     *      A string containing the S56 verifier calculated bu generateCodeVerifier
+     *      A string containing the S256 verifier calculated bu generateCodeVerifier
      *
      * @return
      *      The generated S256 code challenge used for the PKCE request encoded 
@@ -72,7 +72,7 @@ public final class PKCEUtil {
      * Base64URL encoding without padding.
      *
      * @param bytes
-     *      The bytes to be Base54 URL encoded
+     *      The bytes to be Base64 URL encoded
      *
      * @return
      *      The Base64 URL encoded string value corresponding to the bytes