projects / apple / security.git / blame
| Commit | Line | Data |
|---|---|---|
| d8f41ccd | 1 | /* Copyright (c) 1998,2011,2014 Apple Inc. All Rights Reserved. |
| b1ab9ed8 A |
2 | * |
| 3 | * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT | |
| 4 | * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE | |
| d8f41ccd A |
5 | * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE, INC. AND THE |
| 6 | * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE, | |
| b1ab9ed8 A |
7 | * INC. ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL |
| 8 | * EXPOSE YOU TO LIABILITY. | |
| 9 | *************************************************************************** | |
| 10 | * | |
| 11 | * NSRandomNumberGenerator.m | |
| 12 | * | |
| 13 | * Revision History | |
| 14 | * ---------------- | |
| d8f41ccd | 15 | * 28 Mar 97 at Apple |
| b1ab9ed8 A |
16 | * Rewrote using feeRandom module. |
| 17 | * ?? 96 Blaine Garst at NeXT | |
| 18 | * Created. | |
| 19 | */ | |
| 20 | ||
| 21 | /* | |
| 22 | * Note: out _priv ivar is actually a feeRand pointer. | |
| 23 | */ | |
| 24 | ||
| 25 | #import <Foundation/Foundation.h> | |
| 26 | #import "NSRandomNumberGenerator.h" | |
| 27 | #import "feeRandom.h" | |
| 28 | #import "falloc.h" | |
| 29 | ||
| 30 | @implementation NSRandomNumberGenerator | |
| 31 | ||
| 32 | - init | |
| 33 | { | |
| 34 | if(_priv == NULL) { | |
| 35 | _priv = feeRandAlloc(); | |
| 36 | } | |
| 37 | /* | |
| 38 | * else no need to re-init | |
| 39 | */ | |
| 40 | return self; | |
| 41 | } | |
| 42 | ||
| 43 | - initWithSeed:(unsigned)seed | |
| 44 | { | |
| 45 | if(_priv != NULL) { | |
| 46 | /* | |
| 47 | * Free & re-init to use new seed | |
| 48 | */ | |
| 49 | feeRandFree(_priv); | |
| 50 | } | |
| 51 | _priv = feeRandAllocWithSeed(seed); | |
| 52 | return self; | |
| 53 | } | |
| 54 | ||
| 55 | - (unsigned)nextNumber | |
| 56 | { | |
| 57 | if(_priv == NULL) { | |
| 58 | return 0; | |
| 59 | } | |
| 60 | return feeRandNextNum(_priv); | |
| 61 | } | |
| 62 | ||
| 63 | - (unsigned)nextNumberInRange:(NSRange)range | |
| 64 | { | |
| 65 | if(_priv == NULL) { | |
| 66 | return 0; | |
| 67 | } | |
| 68 | return range.location + ([self nextNumber] % range.length); | |
| 69 | } | |
| 70 | ||
| 71 | - (NSData *)randomDataWithLength:(unsigned)l | |
| 72 | { | |
| 73 | unsigned char *cp; | |
| 74 | ||
| 75 | if(_priv == NULL) { | |
| 76 | return nil; | |
| 77 | } | |
| 78 | cp = fmalloc(l); | |
| 79 | feeRandBytes(_priv, cp, l); | |
| 80 | return [NSData dataWithBytesNoCopy:cp length:l]; | |
| 81 | } | |
| 82 | ||
| 83 | @end |