sec/SOSCircle/SecureObjectSync/SOSUserKey.c

   1 //
   2 //  SOSUserKey.c
   3 //  sec
   4 //
   5 //  Created by Richard Murphy on 2/13/13.
   6 //
   7 //
   8
   9 #include <stdio.h>
  10 #include <SecureObjectSync/SOSUserKey.h>
  11 #include <corecrypto/ccrng.h>
  12 #include <corecrypto/ccec.h>
  13 #include <CommonCrypto/CommonRandomSPI.h>
  14 #include <CoreFoundation/CFString.h>
  15
  16 #if 0
  17 #include <corecrypto/ccrng_pbkdf2_prng.h>
  18
  19 #define UK_CONST_DECL(k,v) CFTypeRef k = (CFTypeRef)(CFSTR(v));
  20
  21 UK_CONST_DECL (ukSalt, "salt");
  22 UK_CONST_DECL (ukIteration, "iteration");
  23
  24 static const size_t saltlen = 16;
  25 static const unsigned long iterations = 10240;
  26
  27 static dispatch_once_t  keyParmStoreInit;
  28 static CFMutableDictionaryRef keyParmStorage = NULL;
  29 static void SOSKeyParmStore(CFStringRef user_label, CFDictionaryRef parmData) {
  30     dispatch_once(&keyParmStoreInit, ^{
  31         keyParmStorage = CFDictionaryCreateMutable(kCFAllocatorDefault, 50,  &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
  32     });
  33     CFDictionaryAddValue(keyParmStorage, user_label, parmData);
  34 }
  35
  36 static CFDictionaryRef SOSKeyParmRetrieve(CFStringRef user_label) {
  37     if(keyParmStorage && CFDictionaryContainsKey(keyParmStorage, user_label)) {
  38         CFDictionaryRef parmData = CFDictionaryGetValue(keyParmStorage, user_label);
  39         CFRetain(parmData);
  40         return parmData;
  41     }
  42 /*
  43     const void *keys[] = { ukSalt, ukIteration };
  44     const void *values[] = { cfsalt,  cfiteration };
  45     CFDictionaryRef query = CFDictionaryCreate(kCFAllocatorDefault, keys, values, sizeof(keys)/sizeof(*keys), NULL, NULL);
  46     CFDictionaryRef retval = CFDictionaryCreate(
  47 */
  48     return NULL;
  49 }
  50
  51
  52 static void
  53 SOSUserKeyGenParmPersist(CFStringRef user_label)
  54 {
  55 }
  56
  57 static void
  58 SOSUserKeyGenParmRetrieve(CFStringRef user_label)
  59 {
  60 }
  61 #endif
  62
  63 bool
  64 SOSUserKeyGenerate(int keysize, CFStringRef user_label, CFDataRef user_password, SecKeyRef *user_pubkey, SecKeyRef *user_privkey)
  65 {
  66 #if 0
  67     ccec_const_cp_t cp = ccec_get_cp(keysize);
  68     ccec_full_ctx_decl_cp(cp, full_key);
  69     struct ccrng_pbkdf2_prng_state pbkdf2_prng;
  70     uint8_t salt[saltlen];
  71     if(CCRandomCopyBytes(kCCRandomDefault, salt, sizeof(salt)) != kCCSuccess) return false;
  72     uint8_t password_bytes = CFDataGetBytePtr(user_password);
  73     size_t password_length = CFDataGetLength(user_password);
  74     ccrng_pbkdf2_prng_init(&pbkdf2_prng, 72, password_length, password_bytes, sizeof(salt), salt, iterations);
  75     struct ccrng_state *rng = (struct ccrng_state *)&pbkdf2_prng;
  76     ccec_generate_key(cp, rng, full_key);
  77 #endif
  78
  79     return true;
  80 }