Make configuration enums in lowercase. Wrap create hashes by try-catch. Add initial part of the documentation.

docs/MSC2140_MSC2134.md

@@ -0,0 +1,47 @@
+# MSC2140
+
+## V1 vs V2
+In the [MSC2140](https://github.com/matrix-org/matrix-doc/pull/2140) the v2 prefix was introduced.
+
+Default values:
+```.yaml
+matrix:
+  v1: true   # deprecated
+  v2: true
+```
+
+To disable change value to `false`.
+
+NOTE: the v1 is deprecated, therefore recommend to use only v2 and disable v1 (default value can be ommited):
+```.yaml
+matrix:
+  v1: false
+```
+
+## Terms
+
+Example:
+```.yaml
+policy:
+  policies:
+    term_name: # term name
+      version: 1.0 # version
+      terms:
+        en:  # lang
+          name: term name en  # localized name
+          url: https://ma1sd.host.tld/term_en.html  # localized url
+        fe:  # lang 
+          name: term name fr  # localized name
+          url: https://ma1sd.host.tld/term_fr.html  # localized url
+      regexp:
+        - '/_matrix/identity/v2/account.*'
+        - '/_matrix/identity/v2/hash_lookup'
+```
+Where:
+
+- `term_name` -- name of the terms.
+- `regexp` -- regexp patterns for API.
+
+
+## Hash lookup
+

docs/configure.md

@@ -48,6 +48,9 @@ Create a list under the label `myOtherServers` containing two Identity servers:
 ## Unbind (MSC1915)
 - `session.policy.unbind.enabled`: Enable or disable unbind functionality (MSC1915). (Defaults to true).
 
+## Hash lookups, Term and others (MSC2140, MSC2134)
+See the [dedicated document](MSC2140_MSC2134.md) for configuration.
+
 *Warning*: Unbind check incoming request by two ways:
 - session validation.
 - request signature via `X-Matrix` header and uses `server.publicUrl` property to construct the signing json;

src/main/java/io/kamax/mxisd/config/HashingConfig.java

@@ -23,27 +23,28 @@ public class HashingConfig {
             LOGGER.info("   Pepper length: {}", getPepperLength());
             LOGGER.info("   Rotation policy: {}", getRotationPolicy());
             LOGGER.info("   Hash storage type: {}", getHashStorageType());
-            if (RotationPolicyEnum.PER_SECONDS == rotationPolicy) {
+            if (RotationPolicyEnum.per_seconds == rotationPolicy) {
                 LOGGER.info("   Rotation delay: {}", delay);
             }
+            LOGGER.info("   Algorithms: {}", algorithms);
         } else {
             LOGGER.info("Hash configuration disabled, used only `none` pepper.");
         }
     }
 
     public enum Algorithm {
-        NONE,
-        SHA256
+        none,
+        sha256
     }
 
     public enum RotationPolicyEnum {
-        PER_REQUESTS,
-        PER_SECONDS
+        per_requests,
+        per_seconds
     }
 
     public enum HashStorageEnum {
-        IN_MEMORY,
-        SQL
+        in_memory,
+        sql
     }
 
     public boolean isEnabled() {

src/main/java/io/kamax/mxisd/config/PolicyConfig.java

@@ -100,11 +100,13 @@ public class PolicyConfig {
                     policyObjectItem.getValue().getPatterns().add(Pattern.compile(regexp));
                 }
                 sb.append("  terms:\n");
+                if (policyObject.getTerms() != null) {
                     for (Map.Entry<String, TermObject> termItem : policyObject.getTerms().entrySet()) {
                         sb.append("    - lang: ").append(termItem.getKey()).append("\n");
                         sb.append("      name: ").append(termItem.getValue().getName()).append("\n");
                         sb.append("       url: ").append(termItem.getValue().getUrl()).append("\n");
                     }
+                }
                 LOGGER.info(sb.toString());
             }
         }

src/main/java/io/kamax/mxisd/config/sql/SqlConfig.java

@@ -125,7 +125,7 @@ public abstract class SqlConfig {
     }
 
     public static class Lookup {
-        private String query;
+        private String query = "SELECT user_id AS mxid, medium, address from user_threepids";
 
         public String getQuery() {
             return query;

src/main/java/io/kamax/mxisd/hash/HashEngine.java

@@ -6,11 +6,15 @@ import io.kamax.mxisd.hash.storage.HashStorage;
 import io.kamax.mxisd.lookup.ThreePidMapping;
 import io.kamax.mxisd.lookup.provider.IThreePidProvider;
 import org.apache.commons.lang3.RandomStringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.List;
 
 public class HashEngine {
 
+    private static final Logger LOGGER = LoggerFactory.getLogger(HashEngine.class);
+
     private final List<? extends IThreePidProvider> providers;
     private final HashStorage hashStorage;
     private final MxSha256 sha256 = new MxSha256();
@@ -24,16 +28,22 @@ public class HashEngine {
     }
 
     public void updateHashes() {
+        LOGGER.info("Start update hashes.");
         synchronized (hashStorage) {
             this.pepper = newPepper();
             hashStorage.clear();
             for (IThreePidProvider provider : providers) {
+                try {
                     for (ThreePidMapping pidMapping : provider.populateHashes()) {
                         hashStorage.add(pidMapping, hash(pidMapping));
                     }
+                } catch (Exception e) {
+                    LOGGER.error("Unable to update hashes of the provider: " + provider.toString(), e);
                 }
             }
         }
+        LOGGER.info("Finish update hashes.");
+    }
 
     public String getPepper() {
         synchronized (hashStorage) {

src/main/java/io/kamax/mxisd/hash/HashManager.java

@@ -40,10 +40,10 @@ public class HashManager {
     private void initStorage() {
         if (config.isEnabled()) {
             switch (config.getHashStorageType()) {
-                case IN_MEMORY:
+                case in_memory:
                     this.hashStorage = new InMemoryHashStorage();
                     break;
-                case SQL:
+                case sql:
                     this.hashStorage = new SqlHashStorage(storage);
                     break;
                 default:
@@ -57,10 +57,10 @@ public class HashManager {
     private void initRotationStrategy() {
         if (config.isEnabled()) {
             switch (config.getRotationPolicy()) {
-                case PER_REQUESTS:
+                case per_requests:
                     this.rotationStrategy = new RotationPerRequests();
                     break;
-                case PER_SECONDS:
+                case per_seconds:
                     this.rotationStrategy = new TimeBasedRotation(config.getDelay());
                     break;
                 default:

src/main/java/io/kamax/mxisd/http/undertow/handler/identity/v2/HashLookupHandler.java

@@ -84,7 +84,7 @@ public class HashLookupHandler extends LookupHandler implements ApiHandler {
     }
 
     private void noneAlgorithm(HttpServerExchange exchange, HashLookupRequest request, ClientHashLookupRequest input) throws Exception {
-        if (!hashManager.getConfig().getAlgorithms().contains(HashingConfig.Algorithm.NONE)) {
+        if (!hashManager.getConfig().getAlgorithms().contains(HashingConfig.Algorithm.none)) {
             throw new InvalidParamException();
         }
 
@@ -110,7 +110,7 @@ public class HashLookupHandler extends LookupHandler implements ApiHandler {
     }
 
     private void sha256Algorithm(HttpServerExchange exchange, HashLookupRequest request, ClientHashLookupRequest input) {
-        if (!hashManager.getConfig().getAlgorithms().contains(HashingConfig.Algorithm.SHA256)) {
+        if (!hashManager.getConfig().getAlgorithms().contains(HashingConfig.Algorithm.sha256)) {
             throw new InvalidParamException();
         }