keychain/TrustedPeersHelper/TPHObjcTranslation.m

   1 #import "keychain/TrustedPeersHelper/TPHObjcTranslation.h"
   2
   3 #import <Security/SecKey.h>
   4 #import <Security/SecKeyPriv.h>
   5
   6 #import <SecurityFoundation/SFKey.h>
   7 #import <SecurityFoundation/SFKey_Private.h>
   8 #import <corecrypto/ccsha2.h>
   9 #import <corecrypto/ccrng.h>
  10
  11 @implementation TPHObjectiveC : NSObject
  12
  13 + (SFECKeyPair* _Nullable)fetchKeyPairWithPrivateKeyPersistentRef:(NSData *)persistentRef error:(NSError**)error
  14 {
  15     SecKeyRef seckey = NULL;
  16     OSStatus status = SecKeyFindWithPersistentRef((__bridge CFDataRef)persistentRef, &seckey);
  17
  18     if(status) {
  19         if(error) {
  20             *error = [NSError errorWithDomain:NSOSStatusErrorDomain
  21                                          code:status
  22                                      userInfo:nil];
  23         }
  24         return nil;
  25     }
  26
  27     return [[SFECKeyPair alloc] initWithSecKey: seckey];
  28 }
  29
  30 + (ccec_full_ctx_t)ccec384Context
  31 {
  32     ccec_const_cp_t cp = ccec_cp_384();
  33     size_t size = ccec_full_ctx_size(ccec_ccn_size(cp));
  34     ccec_full_ctx_t heapContext = (ccec_full_ctx_t)malloc(size);
  35     ccec_ctx_init(cp, heapContext);
  36     return heapContext;
  37 }
  38
  39 + (void)contextFree:(void*) context
  40 {
  41     free(context);
  42 }
  43
  44 + (size_t) ccsha384_diSize{
  45     return ccsha384_di()->output_size;
  46 }
  47
  48 + (SFAESKeyBitSize)aes256BitSize{
  49     return SFAESKeyBitSize256;
  50 }
  51
  52 + (NSString*)digestUsingSha384:(NSData*) data {
  53     const struct ccdigest_info *di = ccsha384_di();
  54     NSMutableData* result = [[NSMutableData alloc] initWithLength:ccsha384_di()->output_size];
  55
  56     ccdigest(di, [data length], [data bytes], [result mutableBytes]);
  57
  58     return [result base64EncodedStringWithOptions:0];
  59 }
  60
  61 @end