def getpwnam(user):
passwd = getpwnam_(user)
if not passwd:
raise KeyError("getpwnam(): name not found: {}".format(user))
passwd_fmt = "SSIISSS"
passwd = uctypes.bytes_at(passwd, ustruct.calcsize(passwd_fmt))
passwd = ustruct.unpack(passwd_fmt, passwd)
return struct_passwd(*passwd)
def getpwnam(user):
passwd = getpwnam_(user)
if not passwd:
raise KeyError("getpwnam(): name not found: {}".format(user))
passwd_fmt = "SSIISSS"
passwd = uctypes.bytes_at(passwd, ustruct.calcsize(passwd_fmt))
passwd = ustruct.unpack(passwd_fmt, passwd)
return struct_passwd(*passwd)
def __init__(self):
dict.__init__(self)
env = uctypes.struct(_environ_ptr.get(), _ENV_STRUCT)
for i in range(4096):
if int(env.arr[i]) == 0:
break
s = uctypes.bytes_at(env.arr[i]).decode()
k, v = s.split("=", 1)
dict.__setitem__(self, k, v)
def ctime(t=None):
# Sun Jun 20 23:21:05 1993
ctime_ = libc.func("P", "ctime", "P")
if t is None:
t = time()
t = int(t)
ref = ustruct.pack('l', t)
p = ctime_(ref)
return uctypes.bytes_at(p, _libc.strlen(p) - 1).decode()
def get_header_value(fld_name):
# get a single value, raw, from header; based on field name
from sigheader import FLASH_HEADER_BASE, FW_HEADER_SIZE, FWH_PY_FORMAT, FWH_PY_VALUES
import ustruct, uctypes
idx = FWH_PY_VALUES.split().index(fld_name)
hdr = uctypes.bytes_at(FLASH_HEADER_BASE, FW_HEADER_SIZE)
return ustruct.unpack_from(FWH_PY_FORMAT, hdr)[idx]
def compress(data, level=-1):
dest_buf_sz = compressBound_(len(data))
buf = malloc_(dest_buf_sz)
assert buf is not None
dest_sz_ref = ffilib.makeref("L", dest_buf_sz)
res = compress2_(buf, dest_sz_ref, data, len(data), level)
assert res == 0
out = uctypes.bytes_at(buf, dest_sz_ref[0])
free_(buf)
return out
def ilistdir(path="."):
dir = opendir_(path)
if not dir:
raise_error()
res = []
dirent_fmt = "LLHB256s"
while True:
dirent = readdir_(dir)
if not dirent:
break
import uctypes
dirent = uctypes.bytes_at(dirent, struct.calcsize(dirent_fmt))
dirent = struct.unpack(dirent_fmt, dirent)
dirent = (dirent[-1].split(b'\0', 1)[0], dirent[-2], dirent[0])
yield dirent
def ilistdir(path="."):
dir = opendir_(path)
if not dir:
raise_error()
res = []
dirent_fmt = "LLHB256s"
while True:
dirent = readdir_(dir)
if not dirent:
break
import uctypes
dirent = uctypes.bytes_at(dirent, struct.calcsize(dirent_fmt))
dirent = struct.unpack(dirent_fmt, dirent)
dirent = (dirent[-1].split(b'\0', 1)[0], dirent[-2], dirent[0])
yield dirent
def get_mpy_version():
# read my own file header
# see stm32/bootloader/sigheader.h
from sigheader import FLASH_HEADER_BASE, FW_HEADER_SIZE, FWH_PY_FORMAT
import ustruct, uctypes
try:
# located in flash, but could also use RAM version
hdr = uctypes.bytes_at(FLASH_HEADER_BASE, FW_HEADER_SIZE)
magic_value, timestamp, version_string = ustruct.unpack_from(FWH_PY_FORMAT, hdr)[0:3]
parts = ['%02x'%i for i in timestamp]
date = '20' + '-'.join(parts[0:3])
vers = bytes(version_string).rstrip(b'\0').decode()
return date, vers, ''.join(parts[:-2])
except:
# this is early in boot process, so don't fail!
return '20YY-MM-DD', '?.??', '180731121314'
try:
import uctypes
except ImportError:
print("SKIP")
raise SystemExit
data = bytearray(b"01234567")
print(uctypes.bytes_at(uctypes.addressof(data), 4))
print(uctypes.bytearray_at(uctypes.addressof(data), 4))
print(uctypes.bytes_at(uctypes.addressof(data) + 2))
async def check_firewall_read(*a):
import uctypes
ps = uctypes.bytes_at(0x7800, 32)
assert False # should not be reached
def get_hardware_rng():
"""
Return a 32-bit harware generated random number. According to
documentation
"""
return uctypes.bytes_at(RNG_DATA_REG, RNG_DATA_BYTES)
async def dispatch_DebugLinkMemoryRead(ctx, msg):
from trezor.messages.DebugLinkMemory import DebugLinkMemory
from uctypes import bytes_at
m = DebugLinkMemory()
m.memory = bytes_at(msg.address, msg.length)
return m
async def dispatch_DebugLinkMemoryRead(ctx, msg):
m = DebugLinkMemory()
m.memory = bytes_at(msg.address, msg.length)
return m
try:
import uctypes
except ImportError:
print("SKIP")
raise SystemExit
data = bytearray(b'01234567')
print(uctypes.bytes_at(uctypes.addressof(data), 4))
print(uctypes.bytearray_at(uctypes.addressof(data), 4))