本文整理匯總了Python中rsa.common.bit_size方法的典型用法代碼示例。如果您正苦於以下問題：Python common.bit_size方法的具體用法？Python common.bit_size怎麽用？Python common.bit_size使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類rsa.common的用法示例。
在下文中一共展示了common.bit_size方法的4個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: randint
# 需要導入模塊: from rsa import common [as 別名]
# 或者: from rsa.common import bit_size [as 別名]
def randint(maxvalue):
"""Returns a random integer x with 1 <= x <= maxvalue
May take a very long time in specific situations. If maxvalue needs N bits
to store, the closer maxvalue is to (2 ** N) - 1, the faster this function
is.
"""
bit_size = common.bit_size(maxvalue)
tries = 0
while True:
value = read_random_int(bit_size)
if value <= maxvalue:
break
if tries and tries % 10 == 0:
# After a lot of tries to get the right number of bits but still
# smaller than maxvalue, decrease the number of bits by 1. That'll
# dramatically increase the chances to get a large enough number.
bit_size -= 1
tries += 1
return value 示例2: randint
# 需要導入模塊: from rsa import common [as 別名]
# 或者: from rsa.common import bit_size [as 別名]
def randint(maxvalue):
'''Returns a random integer x with 1 <= x <= maxvalue
May take a very long time in specific situations. If maxvalue needs N bits
to store, the closer maxvalue is to (2 ** N) - 1, the faster this function
is.
'''
bit_size = common.bit_size(maxvalue)
tries = 0
while True:
value = read_random_int(bit_size)
if value <= maxvalue:
break
if tries and tries % 10 == 0:
# After a lot of tries to get the right number of bits but still
# smaller than maxvalue, decrease the number of bits by 1. That'll
# dramatically increase the chances to get a large enough number.
bit_size -= 1
tries += 1
return value 示例3: encrypt_bigfile
# 需要導入模塊: from rsa import common [as 別名]
# 或者: from rsa.common import bit_size [as 別名]
def encrypt_bigfile(infile, outfile, pub_key):
'''Encrypts a file, writing it to 'outfile' in VARBLOCK format.
:param infile: file-like object to read the cleartext from
:param outfile: file-like object to write the crypto in VARBLOCK format to
:param pub_key: :py:class:`rsa.PublicKey` to encrypt with
'''
if not isinstance(pub_key, key.PublicKey):
raise TypeError('Public key required, but got %r' % pub_key)
key_bytes = common.bit_size(pub_key.n) // 8
blocksize = key_bytes - 11 # keep space for PKCS#1 padding
# Write the version number to the VARBLOCK file
outfile.write(byte(varblock.VARBLOCK_VERSION))
# Encrypt and write each block
for block in varblock.yield_fixedblocks(infile, blocksize):
crypto = pkcs1.encrypt(block, pub_key)
varblock.write_varint(outfile, len(crypto))
outfile.write(crypto) 示例4: encrypt_bigfile
# 需要導入模塊: from rsa import common [as 別名]
# 或者: from rsa.common import bit_size [as 別名]
def encrypt_bigfile(infile, outfile, pub_key):
"""Encrypts a file, writing it to 'outfile' in VARBLOCK format.
.. deprecated:: 3.4
This function was deprecated in Python-RSA version 3.4 due to security issues
in the VARBLOCK format. See the documentation_ for more information.
.. _documentation: https://stuvel.eu/python-rsa-doc/usage.html#working-with-big-files
:param infile: file-like object to read the cleartext from
:param outfile: file-like object to write the crypto in VARBLOCK format to
:param pub_key: :py:class:`rsa.PublicKey` to encrypt with
"""
warnings.warn("The 'rsa.bigfile.encrypt_bigfile' function was deprecated in Python-RSA version "
"3.4 due to security issues in the VARBLOCK format. See "
"https://stuvel.eu/python-rsa-doc/usage.html#working-with-big-files "
"for more information.",
DeprecationWarning, stacklevel=2)
if not isinstance(pub_key, key.PublicKey):
raise TypeError('Public key required, but got %r' % pub_key)
key_bytes = common.bit_size(pub_key.n) // 8
blocksize = key_bytes - 11 # keep space for PKCS#1 padding
# Write the version number to the VARBLOCK file
outfile.write(byte(varblock.VARBLOCK_VERSION))
# Encrypt and write each block
for block in varblock.yield_fixedblocks(infile, blocksize):
crypto = pkcs1.encrypt(block, pub_key)
varblock.write_varint(outfile, len(crypto))
outfile.write(crypto)