1  //
  2  //  NSError+KCCreationHelpers.m
  3  //  KechainCircle
  4  //
  5  //
  6  
  7  #import <Foundation/Foundation.h>
  8  
  9  #import <NSError+KCCreationHelpers.h>
 10  
 11  static NSString* coreCryptoDomain = @"kSecCoreCryptoDomain";
 12  static NSString* srpDomain = @"com.apple.security.srp";
 13  
 14  static NSDictionary* UserInfoFromVA(NSString*description, va_list va)
 15      NS_FORMAT_FUNCTION(1, 0);
 16  
 17  static NSDictionary* UserInfoFromVA(NSString*description, va_list va) {
 18      return @{NSLocalizedDescriptionKey:[[NSString alloc] initWithFormat:description
 19                                                                arguments:va]};
 20  }
 21  
 22  // We should get this from SecCFError.h and Security.framework..
 23  bool CoreCryptoError(int cc_result, NSError** error, NSString* description, ...)
 24  {
 25      bool failed = cc_result != 0;
 26  
 27      if (failed && error && !*error) {
 28          va_list va;
 29          va_start(va, description);
 30          *error = [NSError errorWithCoreCryptoStatus:cc_result
 31                                          description:description
 32                                                 args:va];
 33          va_end(va);
 34      }
 35  
 36      return !failed;
 37  }
 38  
 39  bool OSStatusError(OSStatus status, NSError** error, NSString*description, ...) {
 40      bool failed = status != 0;
 41  
 42      if (failed && error && !*error) {
 43          va_list va;
 44          va_start(va, description);
 45          *error = [NSError errorWithOSStatus:status
 46                                  description:description
 47                                         args:va];
 48          va_end(va);
 49      }
 50  
 51      return !failed;
 52  }
 53  
 54  bool RequirementError(bool requirement, NSError** error, NSString*description, ...) {
 55      bool failed = !requirement;
 56  
 57      if (failed && error && !*error) {
 58          va_list va;
 59          va_start(va, description);
 60          *error = [NSError errorWithOSStatus:-50
 61                                  description:description
 62                                         args:va];
 63          va_end(va);
 64      }
 65  
 66      return !failed;
 67  }
 68  
 69  
 70  @implementation NSError(KCCreationHelpers)
 71  
 72  + (instancetype) errorWithOSStatus:(OSStatus) status
 73                            userInfo:(NSDictionary *)dict {
 74      return [[NSError alloc] initWithOSStatus:status userInfo:dict];
 75  }
 76  
 77  - (instancetype) initWithOSStatus:(OSStatus) status
 78                           userInfo:(NSDictionary *)dict {
 79      return [self initWithDomain:NSOSStatusErrorDomain code:status userInfo:dict];
 80  }
 81  
 82  + (instancetype) errorWithOSStatus:(OSStatus) status
 83                         description:(NSString*)description
 84                                args:(va_list)va {
 85      return [[NSError alloc] initWithOSStatus:status description:description args:va];
 86  }
 87  
 88  - (instancetype) initWithOSStatus:(OSStatus) status
 89                        description:(NSString*)description
 90                               args:(va_list)va {
 91      return [self initWithOSStatus:status
 92                           userInfo:UserInfoFromVA(description, va)];
 93  }
 94  
 95  + (instancetype) errorWithCoreCryptoStatus:(int) status
 96                                   userInfo:(NSDictionary *)dict {
 97      return [[NSError alloc] initWithCoreCryptoStatus:status userInfo:dict];
 98  }
 99  
100  
101  - (instancetype) initWithCoreCryptoStatus:(int) status
102                                   userInfo:(NSDictionary *)dict {
103      return [self initWithDomain:coreCryptoDomain code:status userInfo:dict];
104  }
105  
106  + (instancetype) errorWithCoreCryptoStatus:(int) status
107                                 description:(NSString*)description
108                                        args:(va_list)va {
109      return [[NSError alloc] initWithCoreCryptoStatus:status description:description args:va];
110  }
111  
112  - (instancetype) initWithCoreCryptoStatus:(int) status
113                                description:(NSString*)description
114                                       args:(va_list)va {
115      return [self initWithCoreCryptoStatus:status
116                                   userInfo:UserInfoFromVA(description, va)];
117  }
118  
119  @end