| /* Copyright libuv contributors. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to |
| * deal in the Software without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or |
| * sell copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS |
| * IN THE SOFTWARE. |
| */ |
| |
| #include "uv.h" |
| #include "uv-common.h" |
| |
| #ifdef _WIN32 |
| # include "win/internal.h" |
| #else |
| # include "unix/internal.h" |
| #endif |
| |
| static int uv__random(void* buf, size_t buflen) { |
| int rc; |
| |
| #if defined(__PASE__) |
| rc = uv__random_readpath("/dev/urandom", buf, buflen); |
| #elif defined(_AIX) || defined(__QNX__) |
| rc = uv__random_readpath("/dev/random", buf, buflen); |
| #elif defined(__APPLE__) || defined(__OpenBSD__) || \ |
| (defined(__ANDROID_API__) && __ANDROID_API__ >= 28) |
| rc = uv__random_getentropy(buf, buflen); |
| if (rc == UV_ENOSYS) |
| rc = uv__random_devurandom(buf, buflen); |
| #elif defined(__NetBSD__) |
| rc = uv__random_sysctl(buf, buflen); |
| #elif defined(__FreeBSD__) || defined(__linux__) |
| rc = uv__random_getrandom(buf, buflen); |
| if (rc == UV_ENOSYS) |
| rc = uv__random_devurandom(buf, buflen); |
| # if defined(__linux__) |
| switch (rc) { |
| case UV_EACCES: |
| case UV_EIO: |
| case UV_ELOOP: |
| case UV_EMFILE: |
| case UV_ENFILE: |
| case UV_ENOENT: |
| case UV_EPERM: |
| rc = uv__random_sysctl(buf, buflen); |
| break; |
| } |
| # endif |
| #elif defined(_WIN32) |
| uv__once_init(); |
| rc = uv__random_rtlgenrandom(buf, buflen); |
| #else |
| rc = uv__random_devurandom(buf, buflen); |
| #endif |
| |
| return rc; |
| } |
| |
| |
| static void uv__random_work(struct uv__work* w) { |
| uv_random_t* req; |
| |
| req = container_of(w, uv_random_t, work_req); |
| req->status = uv__random(req->buf, req->buflen); |
| } |
| |
| |
| static void uv__random_done(struct uv__work* w, int status) { |
| uv_random_t* req; |
| |
| req = container_of(w, uv_random_t, work_req); |
| uv__req_unregister(req->loop, req); |
| |
| if (status == 0) |
| status = req->status; |
| |
| req->cb(req, status, req->buf, req->buflen); |
| } |
| |
| |
| int uv_random(uv_loop_t* loop, |
| uv_random_t* req, |
| void *buf, |
| size_t buflen, |
| unsigned flags, |
| uv_random_cb cb) { |
| if (buflen > 0x7FFFFFFFu) |
| return UV_E2BIG; |
| |
| if (flags != 0) |
| return UV_EINVAL; |
| |
| if (cb == NULL) |
| return uv__random(buf, buflen); |
| |
| uv__req_init(loop, req, UV_RANDOM); |
| req->loop = loop; |
| req->status = 0; |
| req->cb = cb; |
| req->buf = buf; |
| req->buflen = buflen; |
| |
| uv__work_submit(loop, |
| &req->work_req, |
| UV__WORK_CPU, |
| uv__random_work, |
| uv__random_done); |
| |
| return 0; |
| } |