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minor cleanup and formatting changes

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This commit is contained in:
Larry Bugbee 2017-08-11 01:21:59 -07:00 committed by GitHub
parent 695c3b235d
commit ee55c4e51c
1 changed files with 20 additions and 18 deletions
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38
demos/demo_dynamic.py
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@ -58,7 +58,8 @@ SHOW_CHACHA_EXAMPLE = True
print print
print(' demo_dynamic.py') print(' demo_dynamic.py')
#---------------------------------------------------------------
#-------------------------------------------------------------------------------
# load the .dylib # load the .dylib
libname = 'tomcrypt' libname = 'tomcrypt'
@ -71,8 +72,7 @@ print(' loaded: %s' % LTC)
print print
#-------------------------------------------------------------------------------
#---------------------------------------------------------------
# get list of all supported constants followed by a list of all # get list of all supported constants followed by a list of all
# supported sizes. One alternative: these lists may be parsed # supported sizes. One alternative: these lists may be parsed
# and used as needed. # and used as needed.
@ -84,7 +84,7 @@ if SHOW_ALL_CONSTANTS:
# get size to allocate for constants output list # get size to allocate for constants output list
str_len = c_int(0) str_len = c_int(0)
ret = LTC.crypt_list_all_constants(None, byref(str_len)) ret = LTC.crypt_list_all_constants(None, byref(str_len))
print ' need to allocate %d bytes \n' % str_len.value print ' need to allocate %d bytes to build list \n' % str_len.value
# allocate that size and get (name, size) pairs, each pair # allocate that size and get (name, size) pairs, each pair
# separated by a newline char. # separated by a newline char.
@ -101,7 +101,7 @@ if SHOW_ALL_SIZES:
# get size to allocate for sizes output list # get size to allocate for sizes output list
str_len = c_int(0) str_len = c_int(0)
ret = LTC.crypt_list_all_sizes(None, byref(str_len)) ret = LTC.crypt_list_all_sizes(None, byref(str_len))
print ' need to allocate %d bytes \n' % str_len.value print ' need to allocate %d bytes to build list \n' % str_len.value
# allocate that size and get (name, size) pairs, each pair # allocate that size and get (name, size) pairs, each pair
# separated by a newline char. # separated by a newline char.
@ -111,7 +111,7 @@ if SHOW_ALL_SIZES:
print print
#--------------------------------------------------------------- #-------------------------------------------------------------------------------
# get individually named constants and sizes # get individually named constants and sizes
# print selected constants # print selected constants
@ -131,6 +131,7 @@ if SHOW_SELECTED_CONSTANTS:
rc = LTC.crypt_get_constant(name, byref(const_value)) rc = LTC.crypt_get_constant(name, byref(const_value))
value = const_value.value value = const_value.value
print ' %-25s %d' % (name, value) print ' %-25s %d' % (name, value)
print
# print selected sizes # print selected sizes
if SHOW_SELECTED_SIZES: if SHOW_SELECTED_SIZES:
@ -151,10 +152,11 @@ if SHOW_SELECTED_SIZES:
rc = LTC.crypt_get_size(name, byref(size_value)) rc = LTC.crypt_get_size(name, byref(size_value))
value = size_value.value value = size_value.value
print ' %-25s %d' % (name, value) print ' %-25s %d' % (name, value)
print
#--------------------------------------------------------------- #-------------------------------------------------------------------------------
#--------------------------------------------------------------- #-------------------------------------------------------------------------------
# LibTomCrypt exposes one interesting string that can be accessed # LibTomCrypt exposes one interesting string that can be accessed
# via Python's ctypes module, "crypt_build_settings", which # via Python's ctypes module, "crypt_build_settings", which
# provides a list of this build's compiler switches and supported # provides a list of this build's compiler switches and supported
@ -170,12 +172,10 @@ if SHOW_BUILD_OPTIONS_ALGS:
print 'This is a string compiled into LTC showing compile ' print 'This is a string compiled into LTC showing compile '
print 'options and algorithms supported by this build \n' print 'options and algorithms supported by this build \n'
print get_named_string(LTC, 'crypt_build_settings') print get_named_string(LTC, 'crypt_build_settings')
print
#-------------------------------------------------------------------------------
#--------------------------------------------------------------- #-------------------------------------------------------------------------------
#---------------------------------------------------------------
# here is an example of how Python code can be written to access # here is an example of how Python code can be written to access
# LTC's implementation of SHA256 and ChaCha, # LTC's implementation of SHA256 and ChaCha,
@ -235,7 +235,7 @@ class ChaCha(object):
return dataout.raw return dataout.raw
# - - - - - - - - - - - - - # - - - - - - - - - - - - -
# a SHA256 app fragment... # a SHA256 app fragment
# from wrapper import * # uncomment in real life # from wrapper import * # uncomment in real life
@ -251,7 +251,7 @@ if SHOW_SHA256_EXAMPLE:
print template % (data, md.encode('hex')) print template % (data, md.encode('hex'))
# - - - - - - - - - - - - - # - - - - - - - - - - - - -
# a ChaCha app fragment... # a ChaCha app fragment
if SHOW_CHACHA_EXAMPLE: if SHOW_CHACHA_EXAMPLE:
print '-'*60 print '-'*60
@ -274,8 +274,10 @@ if SHOW_CHACHA_EXAMPLE:
template = ' ChaCha%d decoded text for "%s" is "%s" \n' template = ' ChaCha%d decoded text for "%s" is "%s" \n'
print template % (rounds, plain, decrypted) print template % (rounds, plain, decrypted)
# Footnote: Keys should be erased fm memory as soon as possible after use,
# and that includes Python. For a tip on how to do that in Python, see
# http://buggywhip.blogspot.com/2010/12/erase-keys-and-credit-card-numbers-in.html
#-------------------------------------------------------------------------------
#--------------------------------------------------------------- #-------------------------------------------------------------------------------
#--------------------------------------------------------------- #-------------------------------------------------------------------------------
#---------------------------------------------------------------