python script updates
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@ -1,5 +1,5 @@
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class zcash_fpga:
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import serial
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import codecs
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@ -19,13 +19,13 @@ class zcash_fpga:
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'RESET_FPGA_RPL':int('80000000', 16),
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'VERIFY_SECP256K1_SIG_RPL':int('80000101', 16)}
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fpga_msg_dict = {fpga_msg_type_dict['VERIFY_SECP256K1_SIG_RPL']:{'name':'FPGA_IGNORE_RPL', 'feilds':[(8, 'index', byt_to_hex), (1, 'bm', byt_to_hex)]},
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fpga_msg_dict = {fpga_msg_type_dict['VERIFY_SECP256K1_SIG_RPL']:{'name':'VERIFY_SECP256K1_SIG_RPL', 'feilds':[(8, 'index', byt_to_hex), (1, 'bm', byt_to_hex)]},
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fpga_msg_type_dict['FPGA_IGNORE_RPL']:{'name':'FPGA_IGNORE_RPL', 'feilds':[(8, 'ignored_header', byt_to_hex)]},
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fpga_msg_type_dict['FPGA_STATUS_RPL']:{'name':'FPGA_STATUS_RPL', 'feilds':[(4, 'version', byt_to_ver), (8, 'build_date', byt_to_str), (8, 'buid_host', byt_to_str), (8, 'cmd_cap', byt_to_hex)]},
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fpga_msg_type_dict['RESET_FPGA_RPL']:{'name':'RESET_FPGA_RPL', 'feilds':[]}}
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def __init__(self, COM='COM4'):
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def __init__(self, COM='COM4'):
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self.s = self.serial.Serial(COM, 921600, timeout=1)
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#Test getting FPGA status
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self.get_status()
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@ -42,9 +42,9 @@ class zcash_fpga:
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# Parse reply - should be reset
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res = self.get_reply()
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if (self.struct.unpack('<I', res[4:8])[0] != self.fpga_msg_type_dict['RESET_FPGA_RPL']):
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print("ERROR: Reply type was not RESET_FPGA_RPL")
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print("ERROR: Reply type was not RESET_FPGA_RPL")
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def get_reply(self):
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def get_reply(self):
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res = self.s.read(1024)
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if len(res) > 0:
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self.print_reply(res)
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@ -52,9 +52,9 @@ class zcash_fpga:
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else:
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print ("INFO: No reply received")
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return None
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def secp256k1_verify_sig(self, index, hsh, r, s, Qx, Qy):
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cmd = '00000101000000B0'
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cmd = '00000101000000B0'
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cmd = format(index, 'x').ljust(16, '0') + cmd
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cmd = format(s, 'x').ljust(64, '0') + cmd
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cmd = format(r, 'x').ljust(64, '0') + cmd
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@ -68,7 +68,16 @@ class zcash_fpga:
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res = self.get_reply()
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if res is not None and (self.struct.unpack('<I', res[4:8])[0] != self.fpga_msg_type_dict['VERIFY_SECP256K1_SIG_RPL']):
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print("ERROR: Reply type was not VERIFY_SECP256K1_SIG_RPL")
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return False
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if (self.struct.unpack('<I', res[8:16])[0] != index):
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print("ERROR: Index did not match")
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return False
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if (self.struct.unpack('<I', res[16:17])[0] != 0):
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print("ERROR: Result bitmask was non-zero")
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return False
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print("INFO: Secp256k1 signature verified correctly")
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return True
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def close(self):
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self.s.close()
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print("Closed...")
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@ -82,7 +91,7 @@ class zcash_fpga:
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print("ERROR: Message length mismatch")
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cmd = (self.struct.unpack('<I', msg[4:8])[0])
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if (cmd not in self.fpga_msg_dict):
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print("ERROR: Unknown message type:", cmd)
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print("ERROR: Unknown message type:", cmd)
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print ("INFO: Received ", self.fpga_msg_dict[cmd]['name'])
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offset = 8
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@ -94,7 +103,8 @@ class zcash_fpga:
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#Example usages:
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def example_secp256k1_sig():
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zf = zcash_fpga()
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zf.reset_fpga() # Reset incase somethign went wrong last run
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index = 1234
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hsh = 34597931798561447004034205848155169322219865803759328163562698792725658370004
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r = 550117237093786687120086685263208063857013211911888854762107796665370524299
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