| OLD | NEW |
|---|
| (Empty) |
| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 | |
| 7 /* | |
| 8 ** prrng.h -- NSPR Random Number Generator | |
| 9 ** | |
| 10 ** | |
| 11 ** lth. 29-Oct-1999. | |
| 12 */ | |
| 13 | |
| 14 #ifndef prrng_h___ | |
| 15 #define prrng_h___ | |
| 16 | |
| 17 #include "prtypes.h" | |
| 18 | |
| 19 PR_BEGIN_EXTERN_C | |
| 20 | |
| 21 /* | |
| 22 ** PR_GetRandomNoise() -- Get random noise from the host platform | |
| 23 ** | |
| 24 ** Description: | |
| 25 ** PR_GetRandomNoise() provides, depending on platform, a random value. | |
| 26 ** The length of the random value is dependent on platform and the | |
| 27 ** platform's ability to provide a random value at that moment. | |
| 28 ** | |
| 29 ** The intent of PR_GetRandomNoise() is to provide a "seed" value for a | |
| 30 ** another random number generator that may be suitable for | |
| 31 ** cryptographic operations. This implies that the random value | |
| 32 ** provided may not be, by itself, cryptographically secure. The value | |
| 33 ** generated by PR_GetRandomNoise() is at best, extremely difficult to | |
| 34 ** predict and is as non-deterministic as the underlying platfrom can | |
| 35 ** provide. | |
| 36 ** | |
| 37 ** Inputs: | |
| 38 ** buf -- pointer to a caller supplied buffer to contain the | |
| 39 ** generated random number. buf must be at least as large as | |
| 40 ** is specified in the 'size' argument. | |
| 41 ** | |
| 42 ** size -- the requested size of the generated random number | |
| 43 ** | |
| 44 ** Outputs: | |
| 45 ** a random number provided in 'buf'. | |
| 46 ** | |
| 47 ** Returns: | |
| 48 ** PRSize value equal to the size of the random number actually | |
| 49 ** generated, or zero. The generated size may be less than the size | |
| 50 ** requested. A return value of zero means that PR_GetRandomNoise() is | |
| 51 ** not implemented on this platform, or there is no available noise | |
| 52 ** available to be returned at the time of the call. | |
| 53 ** | |
| 54 ** Restrictions: | |
| 55 ** Calls to PR_GetRandomNoise() may use a lot of CPU on some platforms. | |
| 56 ** Some platforms may block for up to a few seconds while they | |
| 57 ** accumulate some noise. Busy machines generate lots of noise, but | |
| 58 ** care is advised when using PR_GetRandomNoise() frequently in your | |
| 59 ** application. | |
| 60 ** | |
| 61 ** History: | |
| 62 ** Parts of the model dependent implementation for PR_GetRandomNoise() | |
| 63 ** were taken in whole or part from code previously in Netscape's NSS | |
| 64 ** component. | |
| 65 ** | |
| 66 */ | |
| 67 NSPR_API(PRSize) PR_GetRandomNoise( | |
| 68 void *buf, | |
| 69 PRSize size | |
| 70 ); | |
| 71 | |
| 72 PR_END_EXTERN_C | |
| 73 | |
| 74 #endif /* prrng_h___ */ | |
| 75 /* end prrng.h */ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2078763002:
Delete bundled copy of NSS and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/nss@master