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– The 5 required fields are exposes as params. – Token exchange now validates the ID Token iss, aud, and iat claims.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| /*! @file OIDIDToken.h | ||
| @brief AppAuth iOS SDK | ||
| @copyright | ||
| Copyright 2017 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 <Foundation/Foundation.h> | ||
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| NS_ASSUME_NONNULL_BEGIN | ||
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| /*! @brief A convenience class that parses _but not validates_ and ID Token. | ||
| */ | ||
| @interface OIDIDToken : NSObject | ||
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| /*! @internal | ||
| @brief Unavailable. Please use @c initWithAuthorizationResponse:. | ||
| */ | ||
| - (instancetype)init NS_UNAVAILABLE; | ||
|
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| /*! @brief Parses the given ID Token string. | ||
| @param idToken The ID Token spring. | ||
| */ | ||
| - (nullable instancetype)initWithIDTokenString:(NSString *)idToken; | ||
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| /*! @brief The header JWT values. | ||
| */ | ||
| @property(nonatomic, readonly) NSDictionary *header; | ||
|
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| /*! @brief All ID Token claims. | ||
| */ | ||
| @property(nonatomic, readonly) NSDictionary *claims; | ||
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| /*! @brief Issuer Identifier for the Issuer of the response. | ||
| @remarks iss | ||
| @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken | ||
| */ | ||
| @property(nonatomic, readonly) NSURL *issuer; | ||
|
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| /*! @brief Subject Identifier. | ||
| @remarks sub | ||
| @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken | ||
| */ | ||
| @property(nonatomic, readonly) NSString *subject; | ||
|
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| /*! @brief Audience(s) that this ID Token is intended for. | ||
| @remarks aud | ||
| @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken | ||
| */ | ||
| @property(nonatomic, readonly) NSString *audience; | ||
|
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| /*! @brief Expiration time on or after which the ID Token MUST NOT be accepted for processing. | ||
| @remarks exp | ||
| @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken | ||
| */ | ||
| @property(nonatomic, readonly) NSDate *expiresAt; | ||
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| /*! @brief Time at which the JWT was issued. | ||
| @remarks iat | ||
| @see http://openid.net/specs/openid-connect-core-1_0.html#IDToken | ||
| */ | ||
| @property(nonatomic, readonly) NSDate *issuedAt; | ||
|
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| @end | ||
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| NS_ASSUME_NONNULL_END |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,134 @@ | ||
| /*! @file OIDIDToken.m | ||
| @brief AppAuth iOS SDK | ||
| @copyright | ||
| Copyright 2017 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. | ||
| */ | ||
|
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| #import "OIDIDToken.h" | ||
|
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| /*! Field keys associated with an ID Token. */ | ||
| static NSString *const kIssKey = @"iss"; | ||
| static NSString *const kSubKey = @"sub"; | ||
| static NSString *const kAudKey = @"aud"; | ||
| static NSString *const kExpKey = @"exp"; | ||
| static NSString *const kIatKey = @"iat"; | ||
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| #import "OIDFieldMapping.h" | ||
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| @implementation OIDIDToken { | ||
| } | ||
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| - (instancetype)initWithIDTokenString:(NSString *)idToken { | ||
| self = [super init]; | ||
| NSArray *sections = [idToken componentsSeparatedByString:@"."]; | ||
| if (sections.count > 1) { | ||
| _header = [[self class] parseJWTSection:sections[0]]; | ||
| _claims = [[self class] parseJWTSection:sections[1]]; | ||
| if (!_header || !_claims) { | ||
| return nil; | ||
| } | ||
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| [OIDFieldMapping remainingParametersWithMap:[[self class] fieldMap] | ||
| parameters:_claims | ||
| instance:self]; | ||
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| // Required fields. | ||
| if (!_issuer || !_audience || !_subject || !_expiresAt || !_issuedAt) { | ||
| return nil; | ||
| } | ||
|
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| return self; | ||
| } | ||
| return nil; | ||
| } | ||
|
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| /*! @brief Returns a mapping of incoming parameters to instance variables. | ||
| @return A mapping of incoming parameters to instance variables. | ||
| */ | ||
| + (NSDictionary<NSString *, OIDFieldMapping *> *)fieldMap { | ||
| static NSMutableDictionary<NSString *, OIDFieldMapping *> *fieldMap; | ||
| static dispatch_once_t onceToken; | ||
| dispatch_once(&onceToken, ^{ | ||
| fieldMap = [NSMutableDictionary dictionary]; | ||
|
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| fieldMap[kIssKey] = | ||
| [[OIDFieldMapping alloc] initWithName:@"_issuer" | ||
| type:[NSURL class] | ||
| conversion:[OIDFieldMapping URLConversion]]; | ||
| fieldMap[kSubKey] = | ||
| [[OIDFieldMapping alloc] initWithName:@"_subject" type:[NSString class]]; | ||
| fieldMap[kAudKey] = | ||
| [[OIDFieldMapping alloc] initWithName:@"_audience" type:[NSString class]]; | ||
| fieldMap[kExpKey] = | ||
| [[OIDFieldMapping alloc] initWithName:@"_expiresAt" | ||
| type:[NSDate class] | ||
| conversion:^id _Nullable(NSObject *_Nullable value) { | ||
| if (![value isKindOfClass:[NSNumber class]]) { | ||
| return value; | ||
| } | ||
| NSNumber *valueAsNumber = (NSNumber *)value; | ||
| return [NSDate dateWithTimeIntervalSince1970:[valueAsNumber longLongValue]]; | ||
| }]; | ||
| fieldMap[kIatKey] = | ||
| [[OIDFieldMapping alloc] initWithName:@"_issuedAt" | ||
| type:[NSDate class] | ||
| conversion:^id _Nullable(NSObject *_Nullable value) { | ||
| if (![value isKindOfClass:[NSNumber class]]) { | ||
| return value; | ||
| } | ||
| NSNumber *valueAsNumber = (NSNumber *)value; | ||
| return [NSDate dateWithTimeIntervalSince1970:[valueAsNumber longLongValue]]; | ||
| }]; | ||
| }); | ||
| return fieldMap; | ||
| } | ||
|
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| + (NSDictionary *)parseJWTSection:(NSString *)sectionString { | ||
| NSData *decodedData = [[self class] base64urlNoPaddingDecode:sectionString]; | ||
|
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| // Parses JSON. | ||
| NSError *error; | ||
| id object = [NSJSONSerialization JSONObjectWithData:decodedData options:0 error:&error]; | ||
| if (error) { | ||
| NSLog(@"Error %@ parsing token payload %@", error, sectionString); | ||
| } | ||
| if ([object isKindOfClass:[NSDictionary class]]) { | ||
| return (NSDictionary *)object; | ||
| } | ||
|
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| return nil; | ||
| } | ||
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| + (NSData *)base64urlNoPaddingDecode:(NSString *)base64urlNoPaddingString { | ||
| NSMutableString *body = [base64urlNoPaddingString mutableCopy]; | ||
|
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| // Converts base64url to base64. | ||
| NSRange range = NSMakeRange(0, base64urlNoPaddingString.length); | ||
| [body replaceOccurrencesOfString:@"-" withString:@"+" options:NSLiteralSearch range:range]; | ||
| [body replaceOccurrencesOfString:@"_" withString:@"/" options:NSLiteralSearch range:range]; | ||
|
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| // Converts base64 no padding to base64 with padding | ||
| while (body.length % 4 != 0) { | ||
| [body appendString:@"="]; | ||
| } | ||
|
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| // Decodes base64 string. | ||
| NSData *decodedData = [[NSData alloc] initWithBase64EncodedString:body options:0]; | ||
| return decodedData; | ||
| } | ||
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| @end | ||
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