Merge branch 'jens/fido-min-pin-length'

Author: jensutbult

YubiKit/YubiKit/Connections/Shared/Requests/FIDO2/YKFFIDO2GetInfoResponse.h

@@ -144,6 +144,12 @@ extern NSString* const YKFFIDO2GetInfoResponseOptionUserVerification;
  */
 @property (nonatomic, readonly, nullable) NSArray *pinProtocols;
 
+/*!
+ @abstract
+    The current minimum PIN length, in Unicode code points, the authenticator enforces for ClientPIN.
+ */
+@property (nonatomic, readonly) NSUInteger minPinLength;
+
 /*
  Not available: the response will be created by the library.
  */

YubiKit/YubiKit/Connections/Shared/Requests/FIDO2/YKFFIDO2GetInfoResponse.m

@@ -29,7 +29,9 @@ typedef NS_ENUM(NSUInteger, YKFFIDO2GetInfoResponseKey) {
     YKFFIDO2GetInfoResponseKeyAAGUID         = 0x03,
     YKFFIDO2GetInfoResponseKeyOptions        = 0x04,
     YKFFIDO2GetInfoResponseKeyMaxMsgSize     = 0x05,
-    YKFFIDO2GetInfoResponseKeyPinProtocols   = 0x06
+    YKFFIDO2GetInfoResponseKeyPinProtocols   = 0x06,
+    YKFFIDO2GetInfoResponseKeyMinPinLength   = 0x0d
+
 };
 
 @interface YKFFIDO2GetInfoResponse()
@@ -39,6 +41,7 @@ @interface YKFFIDO2GetInfoResponse()
 @property (nonatomic, readwrite) NSData *aaguid;
 @property (nonatomic, readwrite) NSDictionary *options;
 @property (nonatomic, assign, readwrite) NSUInteger maxMsgSize;
+@property (nonatomic, readwrite) NSUInteger minPinLength;
 @property (nonatomic, readwrite) NSArray *pinProtocols;
 
 @end
@@ -95,6 +98,14 @@ - (BOOL)parseResponseMap:(YKFCBORMap *)map {
         self.maxMsgSize = maxMsgSize.integerValue;
     }
 
+    // minPinLength
+    NSNumber *minPinLength = response[@(YKFFIDO2GetInfoResponseKeyMinPinLength)];
+    if (minPinLength != nil) {
+        self.minPinLength = minPinLength.integerValue;
+    } else {
+        self.minPinLength = 4;
+    }
+    
     // pin protocols
     self.pinProtocols = response[@(YKFFIDO2GetInfoResponseKeyPinProtocols)];