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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2017-06-08 10:53:01 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2017-06-08 10:53:01 +0000 |
commit | f95d45c36e7c7131747259956821d844e8952e5d (patch) | |
tree | eee14f8b212c48f8597c2a4927a167fcc3a15ea5 /nss/lib/freebl/unix_urandom.c | |
parent | dc1565216a5d20ae0d75872151523252309a1292 (diff) | |
download | nss-f95d45c36e7c7131747259956821d844e8952e5d.tar.gz |
Diffstat (limited to 'nss/lib/freebl/unix_urandom.c')
-rw-r--r-- | nss/lib/freebl/unix_urandom.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/nss/lib/freebl/unix_urandom.c b/nss/lib/freebl/unix_urandom.c new file mode 100644 index 0000000..25e6ad9 --- /dev/null +++ b/nss/lib/freebl/unix_urandom.c @@ -0,0 +1,50 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include <fcntl.h> +#include <unistd.h> +#include "secerr.h" +#include "secrng.h" +#include "prprf.h" + +void +RNG_SystemInfoForRNG(void) +{ + PRUint8 bytes[SYSTEM_RNG_SEED_COUNT]; + size_t numBytes = RNG_SystemRNG(bytes, SYSTEM_RNG_SEED_COUNT); + if (!numBytes) { + /* error is set */ + return; + } + RNG_RandomUpdate(bytes, numBytes); +} + +size_t +RNG_SystemRNG(void *dest, size_t maxLen) +{ + int fd; + int bytes; + size_t fileBytes = 0; + unsigned char *buffer = dest; + + fd = open("/dev/urandom", O_RDONLY); + if (fd < 0) { + PORT_SetError(SEC_ERROR_NEED_RANDOM); + return 0; + } + while (fileBytes < maxLen) { + bytes = read(fd, buffer, maxLen - fileBytes); + if (bytes <= 0) { + break; + } + fileBytes += bytes; + buffer += bytes; + } + (void)close(fd); + if (fileBytes != maxLen) { + PORT_SetError(SEC_ERROR_NEED_RANDOM); + return 0; + } + return fileBytes; +} |