cheng/libsodium
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Split global information and stream information

Browse Source
This commit is contained in:
Frank Denis 2017-11-25 22:08:40 +01:00
parent 5117b1adc5
commit a7074ffc18
1 changed files with 46 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

82
src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
View File

@ -63,26 +63,32 @@ BOOLEAN NTAPI RtlGenRandom(PVOID RandomBuffer, ULONG RandomBufferLength);
# define SSIZE_MAX (SIZE_MAX / 2 - 1)
#endif
typedef struct Salsa20Random_ {
size_t rnd32_outleft;
int random_data_source_fd;
typedef struct Salsa20RandomGlobal_ {
int initialized;
int random_data_source_fd;
int getrandom_available;
int rdrand_available;
unsigned char key[crypto_stream_salsa20_KEYBYTES];
unsigned char rnd32[16U * SALSA20_RANDOM_BLOCK_SIZE];
uint64_t nonce;
#ifdef HAVE_GETPID
pid_t pid;
#endif
} Salsa20RandomGlobal;
typedef struct Salsa20Random_ {
int initialized;
size_t rnd32_outleft;
unsigned char key[crypto_stream_salsa20_KEYBYTES];
unsigned char rnd32[16U * SALSA20_RANDOM_BLOCK_SIZE];
uint64_t nonce;
} Salsa20Random;
static Salsa20Random stream = {
SODIUM_C99(.rnd32_outleft =) (size_t) 0U,
SODIUM_C99(.random_data_source_fd =) -1,
static Salsa20RandomGlobal global = {
SODIUM_C99(.initialized =) 0,
SODIUM_C99(.getrandom_available =) 0,
SODIUM_C99(.rdrand_available =) 0
SODIUM_C99(.random_data_source_fd =) -1
};
static Salsa20Random stream = {
SODIUM_C99(.initialized =) 0,
SODIUM_C99(.rnd32_outleft =) (size_t) 0U
};
static uint64_t
@ -262,7 +268,7 @@ randombytes_salsa20_random_init(void)
const int errno_save = errno;
stream.nonce = sodium_hrtime();
stream.rdrand_available = sodium_runtime_has_rdrand();
global.rdrand_available = sodium_runtime_has_rdrand();
assert(stream.nonce != (uint64_t) 0U);
# ifdef HAVE_SAFE_ARC4RANDOM
@ -274,15 +280,15 @@ randombytes_salsa20_random_init(void)
unsigned char fodder[16];
if (randombytes_linux_getrandom(fodder, sizeof fodder) == 0) {
stream.getrandom_available = 1;
global.getrandom_available = 1;
errno = errno_save;
return;
}
stream.getrandom_available = 0;
global.getrandom_available = 0;
}
# endif /* SYS_getrandom */
if ((stream.random_data_source_fd =
if ((global.random_data_source_fd =
randombytes_salsa20_random_random_dev_open()) == -1) {
sodium_misuse(); /* LCOV_EXCL_LINE */
}
@ -296,8 +302,8 @@ static void
randombytes_salsa20_random_init(void)
{
stream.nonce = sodium_hrtime();
stream.rdrand_available = sodium_runtime_has_rdrand();
assert(stream.nonce != (uint64_t) 0U);
global.rdrand_available = sodium_runtime_has_rdrand();
}
#endif
@ -315,32 +321,32 @@ randombytes_salsa20_random_xorkey(const unsigned char * const mix)
static void
randombytes_salsa20_random_stir(void)
{
unsigned char m0[crypto_stream_salsa20_KEYBYTES +
crypto_stream_salsa20_NONCEBYTES];
unsigned char m0[crypto_stream_salsa20_KEYBYTES +
crypto_stream_salsa20_NONCEBYTES];
memset(stream.rnd32, 0, sizeof stream.rnd32);
stream.rnd32_outleft = (size_t) 0U;
if (stream.initialized == 0) {
if (global.initialized == 0) {
randombytes_salsa20_random_init();
stream.initialized = 1;
global.initialized = 1;
}
#ifndef _WIN32
# ifdef HAVE_SAFE_ARC4RANDOM
arc4random_buf(m0, sizeof m0);
# elif defined(SYS_getrandom) && defined(__NR_getrandom)
if (stream.getrandom_available != 0) {
if (global.getrandom_available != 0) {
if (randombytes_linux_getrandom(m0, sizeof m0) != 0) {
sodium_misuse(); /* LCOV_EXCL_LINE */
}
} else if (stream.random_data_source_fd == -1 ||
safe_read(stream.random_data_source_fd, m0,
} else if (global.random_data_source_fd == -1 ||
safe_read(global.random_data_source_fd, m0,
sizeof m0) != (ssize_t) sizeof m0) {
sodium_misuse(); /* LCOV_EXCL_LINE */
}
# else
if (stream.random_data_source_fd == -1 ||
safe_read(stream.random_data_source_fd, m0,
if (global.random_data_source_fd == -1 ||
safe_read(global.random_data_source_fd, m0,
sizeof m0) != (ssize_t) sizeof m0) {
sodium_misuse(); /* LCOV_EXCL_LINE */
}
@ -356,8 +362,9 @@ randombytes_salsa20_random_stir(void)
m0 + crypto_stream_salsa20_KEYBYTES, m0);
sodium_memzero(m0, sizeof m0);
#ifdef HAVE_GETPID
stream.pid = getpid();
global.pid = getpid();
#endif
stream.initialized = 1;
}
static void
@ -366,7 +373,7 @@ randombytes_salsa20_random_stir_if_needed(void)
#ifdef HAVE_GETPID
if (stream.initialized == 0) {
randombytes_salsa20_random_stir();
} else if (stream.pid != getpid()) {
} else if (global.pid != getpid()) {
sodium_misuse(); /* LCOV_EXCL_LINE */
}
#else
@ -382,12 +389,12 @@ randombytes_salsa20_random_close(void)
int ret = -1;
#ifndef _WIN32
if (stream.random_data_source_fd != -1 &&
close(stream.random_data_source_fd) == 0) {
stream.random_data_source_fd = -1;
stream.initialized = 0;
if (global.random_data_source_fd != -1 &&
close(global.random_data_source_fd) == 0) {
global.random_data_source_fd = -1;
global.initialized = 0;
# ifdef HAVE_GETPID
stream.pid = (pid_t) 0;
global.pid = (pid_t) 0;
# endif
ret = 0;
}
@ -397,17 +404,20 @@ randombytes_salsa20_random_close(void)
# endif
# if defined(SYS_getrandom) && defined(__NR_getrandom)
if (stream.getrandom_available != 0) {
if (global.getrandom_available != 0) {
ret = 0;
}
# endif
#else /* _WIN32 */
if (stream.initialized != 0) {
stream.initialized = 0;
if (global.initialized != 0) {
global.initialized = 0;
ret = 0;
}
#endif
sodium_memzero(&stream, sizeof stream);
return ret;
}
@ -418,7 +428,7 @@ randombytes_salsa20_random_xorhwrand(void)
#ifdef HAVE_RDRAND
unsigned int r;
if (stream.rdrand_available == 0) {
if (global.rdrand_available == 0) {
return;
}
(void) _rdrand32_step(&r);