def long_to_bytes_original(num):
"""
Convert a long integer to a byte string::
long_to_bytes(n:long) : string
:param num:
Long value
:returns:
Byte string.
"""
byte_array = long_to_bytearray(num)
return bytearray_to_bytes(byte_array)
def long_to_mpi(num):
"""
Converts a long value into an OpenSSL-format MPI Bignum byte string.
:param num:
Long value.
:returns:
OpenSSL-format MPI Bignum byte string.
"""
byte_array = long_to_bytearray(num)
ext = 0
#If the high-order bit is going to be set,
#add an extra byte of zeros
if not (bit_count(num) & 0x7):
ext = 1
length = byte_count(num) + ext
byte_array = bytearray_concat(bytearray_create_zeros(4+ext), byte_array)
byte_array[0] = (length >> 24) & 0xFF
byte_array[1] = (length >> 16) & 0xFF
byte_array[2] = (length >> 8) & 0xFF
byte_array[3] = length & 0xFF
return bytearray_to_bytes(byte_array)
