id = 'atsha204a'
name = 'ATSHA204A'
longname = 'Microchip ATSHA204A'
- desc = 'Microchip ATSHA204A CryptoAuthentication device'
+ desc = 'Microchip ATSHA204A CryptoAuthentication device.'
license = 'gplv2+'
inputs = ['i2c']
outputs = ['atsha204a']
)
def __init__(self):
+ self.reset()
+
+ def reset(self):
self.state = 'IDLE'
self.waddr = self.opcode = -1
self.ss_block = self.es_block = 0
if len(b) < 1: # Ignore wakeup.
return
self.waddr = b[0][2]
- self.display_waddr(b[0])
+ self.put_waddr(b[0])
if self.waddr == WORD_ADDR_COMMAND:
count = b[1][2]
- self.display_count(b[1])
+ self.put_count(b[1])
if len(b) - 1 != count:
- self.display_warning(b[0][0], b[-1][1],
+ self.put_warning(b[0][0], b[-1][1],
'Invalid frame length: Got {}, expecting {} '.format(
- len(b) - 1, count))
+ len(b) - 1, count))
return
self.opcode = b[2][2]
- self.display_opcode(b[2])
- self.display_param1(b[3])
- self.display_param2([b[4], b[5]])
- self.display_data(b[6:-2])
- self.display_crc([b[-2], b[-1]])
+ self.put_opcode(b[2])
+ self.put_param1(b[3])
+ self.put_param2([b[4], b[5]])
+ self.put_data(b[6:-2])
+ self.put_crc([b[-2], b[-1]])
def output_rx_bytes(self):
b = self.bytes
count = b[0][2]
- self.display_count(b[0])
+ self.put_count(b[0])
if self.waddr == WORD_ADDR_RESET:
- self.display_data([b[1]])
- self.display_crc([b[2], b[3]])
- self.display_status(b[0][0], b[-1][1], b[1][2])
+ self.put_data([b[1]])
+ self.put_crc([b[2], b[3]])
+ self.put_status(b[0][0], b[-1][1], b[1][2])
elif self.waddr == WORD_ADDR_COMMAND:
if count == 4: # Status / Error.
- self.display_data([b[1]])
- self.display_crc([b[2], b[3]])
- self.display_status(b[0][0], b[-1][1], b[1][2])
+ self.put_data([b[1]])
+ self.put_crc([b[2], b[3]])
+ self.put_status(b[0][0], b[-1][1], b[1][2])
else:
- self.display_data(b[1:-2])
- self.display_crc([b[-2], b[-1]])
+ self.put_data(b[1:-2])
+ self.put_crc([b[-2], b[-1]])
+
+ def putx(self, s, data):
+ self.put(s[0], s[1], self.out_ann, data)
+
+ def puty(self, s, data):
+ self.put(s[0][0], s[1][1], self.out_ann, data)
+
+ def putz(self, ss, es, data):
+ self.put(ss, es, self.out_ann, data)
- def display_waddr(self, data):
- self.put(data[0], data[1], self.out_ann, [0, ['Word addr: %s' % WORD_ADDR[data[2]]]])
+ def put_waddr(self, s):
+ self.putx(s, [0, ['Word addr: %s' % WORD_ADDR[s[2]]]])
- def display_count(self, data):
- self.put(data[0], data[1], self.out_ann, [1, ['Count: %s' % data[2]]])
+ def put_count(self, s):
+ self.putx(s, [1, ['Count: %s' % s[2]]])
- def display_opcode(self, data):
- self.put(data[0], data[1], self.out_ann, [2, ['Opcode: %s' % OPCODES[data[2]]]])
+ def put_opcode(self, s):
+ self.putx(s, [2, ['Opcode: %s' % OPCODES[s[2]]]])
- def display_param1(self, data):
- if self.opcode in (OPCODE_CHECK_MAC, OPCODE_DEV_REV, OPCODE_HMAC, \
+ def put_param1(self, s):
+ op = self.opcode
+ if op in (OPCODE_CHECK_MAC, OPCODE_DEV_REV, OPCODE_HMAC, \
OPCODE_MAC, OPCODE_NONCE, OPCODE_RANDOM, OPCODE_SHA):
- self.put(data[0], data[1], self.out_ann, [3, ['Mode: %02X' % data[2]]])
- elif self.opcode == OPCODE_DERIVE_KEY:
- self.put(data[0], data[1], self.out_ann, [3, ['Random: %s' % data[2]]])
- elif self.opcode == OPCODE_GEN_DIG:
- self.put(data[0], data[1], self.out_ann, [3, ['Zone: %s' % ZONES[data[2]]]])
- elif self.opcode == OPCODE_LOCK:
- self.put(data[0], data[1], self.out_ann, [3, ['Zone: {}, Summary: {}'.format(
- 'DATA/OTP' if data[2] else 'CONFIG',
- 'Ignored' if data[2] & 0x80 else 'Used')]])
- elif self.opcode == OPCODE_PAUSE:
- self.put(data[0], data[1], self.out_ann, [3, ['Selector: %02X' % data[2]]])
- elif self.opcode == OPCODE_READ:
- self.put(data[0], data[1], self.out_ann, [3, ['Zone: {}, Length: {}'.format(ZONES[data[2] & 0x03],
- '32 bytes' if data[2] & 0x90 else '4 bytes')]])
- elif self.opcode == OPCODE_WRITE:
- self.put(data[0], data[1], self.out_ann, [3, ['Zone: {}, Encrypted: {}, Length: {}'.format(ZONES[data[2] & 0x03],
- 'Yes' if data[2] & 0x40 else 'No', '32 bytes' if data[2] & 0x90 else '4 bytes')]])
+ self.putx(s, [3, ['Mode: %02X' % s[2]]])
+ elif op == OPCODE_DERIVE_KEY:
+ self.putx(s, [3, ['Random: %s' % s[2]]])
+ elif op == OPCODE_GEN_DIG:
+ self.putx(s, [3, ['Zone: %s' % ZONES[s[2]]]])
+ elif op == OPCODE_LOCK:
+ self.putx(s, [3, ['Zone: {}, Summary: {}'.format(
+ 'DATA/OTP' if s[2] else 'CONFIG',
+ 'Ignored' if s[2] & 0x80 else 'Used')]])
+ elif op == OPCODE_PAUSE:
+ self.putx(s, [3, ['Selector: %02X' % s[2]]])
+ elif op == OPCODE_READ:
+ self.putx(s, [3, ['Zone: {}, Length: {}'.format(ZONES[s[2] & 0x03],
+ '32 bytes' if s[2] & 0x90 else '4 bytes')]])
+ elif op == OPCODE_WRITE:
+ self.putx(s, [3, ['Zone: {}, Encrypted: {}, Length: {}'.format(ZONES[s[2] & 0x03],
+ 'Yes' if s[2] & 0x40 else 'No', '32 bytes' if s[2] & 0x90 else '4 bytes')]])
else:
- self.put(data[0], data[1], self.out_ann, [3, ['Param1: %02X' % data[2]]])
+ self.putx(s, [3, ['Param1: %02X' % s[2]]])
- def display_param2(self, data):
- if self.opcode == OPCODE_DERIVE_KEY:
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['TargetKey: {:02x} {:02x}'.format(data[1][2], data[0][2])]])
- elif self.opcode in (OPCODE_NONCE, OPCODE_PAUSE, OPCODE_RANDOM):
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['Zero: {:02x} {:02x}'.format(data[1][2], data[0][2])]])
- elif self.opcode in (OPCODE_HMAC, OPCODE_MAC, OPCODE_CHECK_MAC, OPCODE_GEN_DIG):
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['SlotID: {:02x} {:02x}'.format(data[1][2], data[0][2])]])
- elif self.opcode == OPCODE_LOCK:
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['Summary: {:02x} {:02x}'.format(data[1][2], data[0][2])]])
- elif self.opcode in (OPCODE_READ, OPCODE_WRITE):
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['Address: {:02x} {:02x}'.format(data[1][2], data[0][2])]])
- elif self.opcode == OPCODE_UPDATE_EXTRA:
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['NewValue: {:02x}'.format(data[0][2])]])
+ def put_param2(self, s):
+ op = self.opcode
+ if op == OPCODE_DERIVE_KEY:
+ self.puty(s, [4, ['TargetKey: {:02x} {:02x}'.format(s[1][2], s[0][2])]])
+ elif op in (OPCODE_NONCE, OPCODE_PAUSE, OPCODE_RANDOM):
+ self.puty(s, [4, ['Zero: {:02x} {:02x}'.format(s[1][2], s[0][2])]])
+ elif op in (OPCODE_HMAC, OPCODE_MAC, OPCODE_CHECK_MAC, OPCODE_GEN_DIG):
+ self.puty(s, [4, ['SlotID: {:02x} {:02x}'.format(s[1][2], s[0][2])]])
+ elif op == OPCODE_LOCK:
+ self.puty(s, [4, ['Summary: {:02x} {:02x}'.format(s[1][2], s[0][2])]])
+ elif op in (OPCODE_READ, OPCODE_WRITE):
+ self.puty(s, [4, ['Address: {:02x} {:02x}'.format(s[1][2], s[0][2])]])
+ elif op == OPCODE_UPDATE_EXTRA:
+ self.puty(s, [4, ['NewValue: {:02x}'.format(s[0][2])]])
else:
- self.put(data[0][0], data[1][1], self.out_ann, [4, ['-']])
+ self.puty(s, [4, ['-']])
- def display_data(self, data):
- if len(data) == 0:
+ def put_data(self, s):
+ if len(s) == 0:
return
- if self.opcode == OPCODE_CHECK_MAC:
- self.put(data[0][0], data[31][1], self.out_ann, [5, ['ClientChal: %s' % ' '.join(format(i[2], '02x') for i in data[0:31])]])
- self.put(data[32][0], data[63][1], self.out_ann, [5, ['ClientResp: %s' % ' '.join(format(i[2], '02x') for i in data[32:63])]])
- self.put(data[64][0], data[76][1], self.out_ann, [5, ['OtherData: %s' % ' '.join(format(i[2], '02x') for i in data[64:76])]])
- elif self.opcode == OPCODE_DERIVE_KEY:
- self.put(data[0][0], data[31][1], self.out_ann, [5, ['MAC: %s' % ' '.join(format(i[2], '02x') for i in data)]])
- elif self.opcode == OPCODE_GEN_DIG:
- self.put(data[0][0], data[3][1], self.out_ann, [5, ['OtherData: %s' % ' '.join(format(i[2], '02x') for i in data)]])
- elif self.opcode == OPCODE_MAC:
- self.put(data[0][0], data[31][1], self.out_ann, [5, ['Challenge: %s' % ' '.join(format(i[2], '02x') for i in data)]])
- elif self.opcode == OPCODE_WRITE:
- if len(data) > 32: # Value + MAC.
- self.put(data[0][0], data[-31][1], self.out_ann, [5, ['Value: %s' % ' '.join(format(i[2], '02x') for i in data)]])
- self.put(data[-32][0], data[-1][1], self.out_ann, [5, ['MAC: %s' % ' '.join(format(i[2], '02x') for i in data)]])
+ op = self.opcode
+ if op == OPCODE_CHECK_MAC:
+ self.putz(s[0][0], s[31][1], [5, ['ClientChal: %s' % ' '.join(format(i[2], '02x') for i in s[0:31])]])
+ self.putz(s[32][0], s[63][1], [5, ['ClientResp: %s' % ' '.join(format(i[2], '02x') for i in s[32:63])]])
+ self.putz(s[64][0], s[76][1], [5, ['OtherData: %s' % ' '.join(format(i[2], '02x') for i in s[64:76])]])
+ elif op == OPCODE_DERIVE_KEY:
+ self.putz(s[0][0], s[31][1], [5, ['MAC: %s' % ' '.join(format(i[2], '02x') for i in s)]])
+ elif op == OPCODE_GEN_DIG:
+ self.putz(s[0][0], s[3][1], [5, ['OtherData: %s' % ' '.join(format(i[2], '02x') for i in s)]])
+ elif op == OPCODE_MAC:
+ self.putz(s[0][0], s[31][1], [5, ['Challenge: %s' % ' '.join(format(i[2], '02x') for i in s)]])
+ elif op == OPCODE_WRITE:
+ if len(s) > 32: # Value + MAC.
+ self.putz(s[0][0], s[-31][1], [5, ['Value: %s' % ' '.join(format(i[2], '02x') for i in s)]])
+ self.putz(s[-32][0], s[-1][1], [5, ['MAC: %s' % ' '.join(format(i[2], '02x') for i in s)]])
else: # Just value.
- self.put(data[0][0], data[-1][1], self.out_ann, [5, ['Value: %s' % ' '.join(format(i[2], '02x') for i in data)]])
+ self.putz(s[0][0], s[-1][1], [5, ['Value: %s' % ' '.join(format(i[2], '02x') for i in s)]])
else:
- self.put(data[0][0], data[-1][1], self.out_ann, [5, ['Data: %s' % ' '.join(format(i[2], '02x') for i in data)]])
+ self.putz(s[0][0], s[-1][1], [5, ['Data: %s' % ' '.join(format(i[2], '02x') for i in s)]])
- def display_crc(self, data):
- self.put(data[0][0], data[1][1], self.out_ann, [6, ['CRC: {:02X} {:02X}'.format(data[0][2], data[1][2])]])
+ def put_crc(self, s):
+ self.puty(s, [6, ['CRC: {:02X} {:02X}'.format(s[0][2], s[1][2])]])
- def display_status(self, start, end, status):
- self.put(start, end, self.out_ann, [7, ['Status: %s' % STATUS[status]]])
+ def put_status(self, ss, es, status):
+ self.putz(ss, es, [7, ['Status: %s' % STATUS[status]]])
- def display_warning(self, start, end, msg):
- self.put(start, end, self.out_ann, [8, ['Warning: %s' % msg]])
+ def put_warning(self, ss, es, msg):
+ self.putz(ss, es, [8, ['Warning: %s' % msg]])
def decode(self, ss, es, data):
cmd, databyte = data