74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
import numpy
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from struct import pack, unpack
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import time
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import hashlib
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import random
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import pyopencl as cl
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hash_dt = numpy.dtype([('target', numpy.uint64), ('v', numpy.str_, 73)])
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ctx = False
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queue = False
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program = False
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try:
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if (len(cl.get_platforms()) > 0):
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ctx = cl.create_some_context()
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queue = cl.CommandQueue(ctx)
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#f = open('/usr/src/PyBitmessage/src/kernel.cl', 'r')
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import os
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print "working directory: " + os.getcwd()
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# time.sleep(5)
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f = open('kernel.cl', 'r')
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fstr = ''.join(f.readlines())
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program = cl.Program(ctx, fstr).build()
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except Exception as e:
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print "opencl fail:" + str(e)
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# time.sleep(5)
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ctx = False
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def has_opencl():
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return (ctx != False)
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def do_opencl_pow(hash, target):
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output = numpy.zeros(1, dtype=[('v', numpy.uint64, 1)])
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if (ctx == False):
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return output[0][0]
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data = numpy.zeros(1, dtype=hash_dt, order='C')
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data[0]['v'] = ("0000000000000000" + hash).decode("hex")
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data[0]['target'] = target
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hash_buf = cl.Buffer(ctx, cl.mem_flags.READ_ONLY | cl.mem_flags.COPY_HOST_PTR, hostbuf=data)
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dest_buf = cl.Buffer(ctx, cl.mem_flags.WRITE_ONLY, output.nbytes)
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kernel = program.kernel_sha512
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worksize = kernel.get_work_group_info(cl.kernel_work_group_info.WORK_GROUP_SIZE, cl.get_platforms()[0].get_devices()[0])
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kernel.set_arg(0, hash_buf)
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kernel.set_arg(1, dest_buf)
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start = time.time()
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progress = 0
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globamt = worksize*2000
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while output[0][0] == 0:
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kernel.set_arg(2, pack("<Q", progress))
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cl.enqueue_nd_range_kernel(queue, kernel, (globamt,), (worksize,))
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cl.enqueue_read_buffer(queue, dest_buf, output)
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queue.finish()
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progress += globamt
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sofar = time.time() - start
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print sofar, progress / sofar, "hashes/sec"
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taken = time.time() - start
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print progress, taken
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return output[0][0]
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if __name__ == "__main__":
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target = 54227212183L
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initialHash = "3758f55b5a8d902fd3597e4ce6a2d3f23daff735f65d9698c270987f4e67ad590b93f3ffeba0ef2fd08a8dc2f87b68ae5a0dc819ab57f22ad2c4c9c8618a43b3".decode("hex")
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nonce = do_opencl_pow(initialHash.encode("hex"), target)
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trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
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print "{} - value {} < {}".format(nonce, trialValue, target)
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