adding pods method of package managing

2021-12-13 12:34:20 -08:00
parent dad674aca7
commit 705203d7bd
5871 changed files with 1259393 additions and 3 deletions
@@ -0,0 +1,89 @@
+/*! @file OIDTokenUtilities.m
+    @brief AppAuth iOS SDK
+    @copyright
+        Copyright 2015 Google Inc. All Rights Reserved.
+    @copydetails
+        Licensed under the Apache License, Version 2.0 (the "License");
+        you may not use this file except in compliance with the License.
+        You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+        Unless required by applicable law or agreed to in writing, software
+        distributed under the License is distributed on an "AS IS" BASIS,
+        WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+        See the License for the specific language governing permissions and
+        limitations under the License.
+ */
+
+#import "OIDTokenUtilities.h"
+
+#import <CommonCrypto/CommonDigest.h>
+
+/*! @brief String representing the set of characters that are allowed as is for the
+        application/x-www-form-urlencoded encoding algorithm.
+ */
+static NSString *const kFormUrlEncodedAllowedCharacters =
+    @" *-._0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
+
+@implementation OIDTokenUtilities
+
+ (NSString *)encodeBase64urlNoPadding:(NSData *)data {
+  NSString *base64string = [data base64EncodedStringWithOptions:0];
+  // converts base64 to base64url
+  base64string = [base64string stringByReplacingOccurrencesOfString:@"+" withString:@"-"];
+  base64string = [base64string stringByReplacingOccurrencesOfString:@"/" withString:@"_"];
+  // strips padding
+  base64string = [base64string stringByReplacingOccurrencesOfString:@"=" withString:@""];
+  return base64string;
+}
+
+ (nullable NSString *)randomURLSafeStringWithSize:(NSUInteger)size {
+  NSMutableData *randomData = [NSMutableData dataWithLength:size];
+  int result = SecRandomCopyBytes(kSecRandomDefault, randomData.length, randomData.mutableBytes);
+  if (result != 0) {
+    return nil;
+  }
+  return [[self class] encodeBase64urlNoPadding:randomData];
+}
+
+ (NSData *)sha256:(NSString *)inputString {
+  NSData *verifierData = [inputString dataUsingEncoding:NSUTF8StringEncoding];
+  NSMutableData *sha256Verifier = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH];
+  CC_SHA256(verifierData.bytes, (CC_LONG)verifierData.length, sha256Verifier.mutableBytes);
+  return sha256Verifier;
+}
+
+ (NSString *)redact:(NSString *)inputString {
+  if (inputString == nil) {
+    return nil;
+  }
+  switch(inputString.length){
+    case 0:
+      return @"";
+    case 1 ... 8:
+      return @"[redacted]";
+    case 9:
+    default:
+      return [[inputString substringToIndex:6] stringByAppendingString:@"...[redacted]"];
+  }
+}
+
+ (NSString*)formUrlEncode:(NSString*)inputString {
+  // https://www.w3.org/TR/html5/sec-forms.html#application-x-www-form-urlencoded-encoding-algorithm
+  // Following the spec from the above link, application/x-www-form-urlencoded percent encode all
+  // the characters except *-._A-Za-z0-9
+  // Space character is replaced by + in the resulting bytes sequence
+  if (inputString.length == 0) {
+    return inputString;
+  }
+  NSCharacterSet *allowedCharacters =
+      [NSCharacterSet characterSetWithCharactersInString:kFormUrlEncodedAllowedCharacters];
+  // Percent encode all characters not present in the provided set.
+  NSString *encodedString =
+      [inputString stringByAddingPercentEncodingWithAllowedCharacters:allowedCharacters];
+  // Replace occurences of space by '+' character
+  return [encodedString stringByReplacingOccurrencesOfString:@" " withString:@"+"];
+}
+
+@end