From 131297a33f3da4111bfb617e4712f253fb4d35a3 Mon Sep 17 00:00:00 2001
From: Alex Auvolat <alex@adnab.me>
Date: Sun, 19 Jan 2020 18:04:42 +0100
Subject: [PATCH] Case insensitive match on attribute names

---
 main.go | 42 +++++++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 19 deletions(-)

diff --git a/main.go b/main.go
index 745d3fd..f717382 100644
--- a/main.go
+++ b/main.go
@@ -329,8 +329,8 @@ func (server *Server) handleSearchInternal(state *State, w ldap.ResponseWriter,
 			// If attribute is not in request, exclude it from returned entry
 			if len(r.Attributes()) > 0 {
 				found := false
-				for _, need := range r.Attributes() {
-					if string(need) == attr {
+				for _, requested := range r.Attributes() {
+					if strings.EqualFold(string(requested), attr) {
 						found = true
 						break
 					}
@@ -389,32 +389,36 @@ func applyFilter(entry Entry, filter message.Filter) (bool, error) {
 		return !res, nil
 	} else if fPresent, ok := filter.(message.FilterPresent); ok {
 		what := string(fPresent)
-		log.Printf("Present filter: %s", what)
-		if _, ok := entry[what]; ok {
-			return true, nil
+		// Case insensitive search
+		for desc := range entry {
+			if strings.EqualFold(what, desc) {
+				return true, nil
+			}
 		}
 		return false, nil
 	} else if fEquality, ok := filter.(message.FilterEqualityMatch); ok {
 		desc := string(fEquality.AttributeDesc())
 		target := string(fEquality.AssertionValue())
-		if value, ok := entry[desc]; ok {
-			if vstr, ok := value.(string); ok {
-				// If we have one value for the key, match exactly
-				return vstr == target, nil
-			} else if vlist, ok := value.([]string); ok {
-				// If we have several values for the key, one must match
-				for _, val := range vlist {
-					if val == target {
-						return true, nil
+		// Case insensitive attribute search
+		for entry_desc, value := range entry {
+			if strings.EqualFold(entry_desc, desc) {
+				if vstr, ok := value.(string); ok {
+					// If we have one value for the key, match exactly
+					return vstr == target, nil
+				} else if vlist, ok := value.([]string); ok {
+					// If we have several values for the key, one must match
+					for _, val := range vlist {
+						if val == target {
+							return true, nil
+						}
 					}
+					return false, nil
+				} else {
+					panic(fmt.Sprintf("Invalid value: %#v", value))
 				}
-				return false, nil
-			} else {
-				panic(fmt.Sprintf("Invalid value: %#v", value))
 			}
-		} else {
-			return false, nil
 		}
+		return false, nil
 	} else {
 		return false, fmt.Errorf("Unsupported filter: %#v %T", filter, filter)
 	}