| | 1 | /* |
| | 2 | * Copyright (C) 2011 Google Inc. All rights reserved. |
| | 3 | * |
| | 4 | * Redistribution and use in source and binary forms, with or without |
| | 5 | * modification, are permitted provided that the following conditions |
| | 6 | * are met: |
| | 7 | * 1. Redistributions of source code must retain the above copyright |
| | 8 | * notice, this list of conditions and the following disclaimer. |
| | 9 | * 2. Redistributions in binary form must reproduce the above copyright |
| | 10 | * notice, this list of conditions and the following disclaimer in the |
| | 11 | * documentation and/or other materials provided with the distribution. |
| | 12 | * |
| | 13 | * THIS SOFTWARE IS PROVIDED BY GOOGLE, INC. ``AS IS'' AND ANY |
| | 14 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| | 15 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| | 16 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| | 17 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| | 18 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| | 19 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| | 20 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| | 21 | * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| | 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| | 23 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| | 24 | */ |
| | 25 | |
| | 26 | #include "config.h" |
| | 27 | #include "OSRandomSource.h" |
| | 28 | |
| | 29 | #include <stdint.h> |
| | 30 | #include <stdlib.h> |
| | 31 | |
| | 32 | #if OS(SYMBIAN) |
| | 33 | #include <e32math.h> |
| | 34 | #endif |
| | 35 | |
| | 36 | #if OS(UNIX) |
| | 37 | #include <fcntl.h> |
| | 38 | #include <unistd.h> |
| | 39 | #endif |
| | 40 | |
| | 41 | #if OS(WINDOWS) |
| | 42 | #include <windows.h> |
| | 43 | #include <wincrypt.h> // windows.h must be included before wincrypt.h. |
| | 44 | #endif |
| | 45 | |
| | 46 | namespace WTF { |
| | 47 | |
| | 48 | #if USE(OS_RANDOMNESS) |
| | 49 | void cryptographicallyRandomValuesFromOS(unsigned char* buffer, size_t length) |
| | 50 | { |
| | 51 | #if OS(SYMBIAN) |
| | 52 | TInt random; |
| | 53 | while (length > sizeof(random)) { |
| | 54 | random = Math::Random(); |
| | 55 | memcpy(buffer, &random, sizeof(random)); |
| | 56 | length -= sizeof(random); |
| | 57 | buffer += sizeof(random); |
| | 58 | } |
| | 59 | if (length > 0) { |
| | 60 | random = Math::Random(); |
| | 61 | memcpy(buffer, &random, length); |
| | 62 | } |
| | 63 | #elif OS(UNIX) |
| | 64 | int fd = open("/dev/urandom", O_RDONLY, 0); |
| | 65 | if (fd < 0) |
| | 66 | CRASH(); // We need /dev/urandom for this API to work... |
| | 67 | |
| | 68 | if (read(fd, buffer, length) != static_cast<ssize_t>(length)) |
| | 69 | CRASH(); |
| | 70 | |
| | 71 | close(fd); |
| | 72 | #elif OS(WINDOWS) |
| | 73 | HCRYPTPROV hCryptProv = 0; |
| | 74 | if (!CryptAcquireContext(&hCryptProv, 0, MS_DEF_PROV, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT)) |
| | 75 | CRASH(); |
| | 76 | if (!CryptGenRandom(hCryptProv, length, buffer)) |
| | 77 | CRASH(); |
| | 78 | CryptReleaseContext(hCryptProv, 0); |
| | 79 | #else |
| | 80 | #error "This configuration doesn't have a strong source of randomness." |
| | 81 | // WARNING: When adding new sources of OS randomness, the randomness must |
| | 82 | // be of cryptographic quality! |
| | 83 | #endif |
| | 84 | } |
| | 85 | #endif |
| | 86 | |
| | 87 | } |
projects / apple / javascriptcore.git / blame_incremental