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GOST cryptographic functions
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drobotun/gostcrypto
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The package implements various cryptographic functions defined in the State standards of the Russian Federation. It includes the following modules:
- gosthash: The module implements functions for calculating hash amounts in accordance with GOST R 34.11-2012.
- gostcipher: The module implements block encryption functions in accordance with GOST R 34.12-2015 and their use modes in accordance with GOST R 34.13-2015.
- gostsignature: The module implements the functions of forming and verifying an electronic digital signature in accordance with GOST R 34.10-2012.
- gostrandom: The module implements functions for generating pseudo-random sequences in accordance with R 1323565.1.006-2017.
- gosthmac: The module implements the functions of calculating the HMAC message authentication code in accordance with R 50.1.113-2016.
- gostpbkdf: The module implements the password-based key derivation function in accordance with R 50.1.111-2016.
- gostoid: The module implements generating identifiers for cryptographic objects.
$ pip install gostcrypto
importgostcryptohash_string=u'Се ветри, Стрибожи внуци, веютъ с моря стрелами на храбрыя плъкы Игоревы'.encode('cp1251')hash_obj=gostcrypto.gosthash.new('streebog256',data=hash_string)hash_result=hash_obj.hexdigest()
In this case the 'buffer_size' value must be a multiple of the 'block_size' value.
importgostcryptofile_path='hash_file.txt'buffer_size=128hash_obj=gostcrypto.gosthash.new('streebog512')withopen(file_path,'rb')asfile:buffer=file.read(buffer_size)whilelen(buffer)>0:hash_obj.update(buffer)buffer=file.read(buffer_size)hash_result=hash_obj.hexdigest()
importgostcryptohash_obj=gostcrypto.gosthash.new('streebog512')oid_name=hash_obj.oid.name
importgostcryptokey=bytearray([0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,])plain_text=bytearray([0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x00,0xff,0xee,0xdd,0xcc,0xbb,0xaa,0x99,0x88,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xee,0xff,0x0a,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xee,0xff,0x0a,0x00,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xaa,0xbb,0xcc,0xee,0xff,0x0a,0x00,0x11,])cipher_obj=gostcrypto.gostcipher.new('kuznechik',key,gostcrypto.gostcipher.MODE_ECB,pad_mode=gostcrypto.gostcipher.PAD_MODE_1)cipher_text=cipher_obj.encrypt(plain_text)
In this case the 'buffer_size' value must be a multiple of the 'block_size' value.
importgostcryptokey=bytearray([0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,])init_vect=bytearray([0x12,0x34,0x56,0x78,0x90,0xab,0xce,0xf0,])plain_file_path='plain_file.txt'cipher_file_path='cipher_file.txt'cipher_obj=gostcrypto.gostcipher.new('kuznechik',key,gostcrypto.gostcipher.MODE_CTR,init_vect=init_vect)buffer_size=128plain_file=open(plain_file_path,'rb')cipher_file=open(cipher_file_path,'wb')buffer=plain_file.read(buffer_size)whilelen(buffer)>0:cipher_data=cipher_obj.encrypt(buffer)cipher_file.write(cipher_data)buffer=plain_file.read(buffer_size))
In this case the 'buffer_size' value must be a multiple of the 'block_size' value.
importgostcryptokey=bytearray([0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,])plain_file_path='plain_file.txt'cipher_obj=gostcrypto.gostcipher.new('kuznechik',key,gostcrypto.gostcipher.MODE_MAC)buffer_size=128plain_file=open(plain_file_path,'rb')buffer=plain_file.read(buffer_size)whilelen(buffer)>0:cipher_obj.update(buffer)buffer=plain_file.read(buffer_size)mac_result=cipher_obj.digest(8)
importgostcryptoprivate_key=bytearray.fromhex('7a929ade789bb9be10ed359dd39a72c11b60961f49397eee1d19ce9891ec3b28')digest=bytearray.fromhex('2dfbc1b372d89a1188c09c52e0eec61fce52032ab1022e8e67ece6672b043ee5')sign_obj=gostcrypto.gostsignature.new(gostcrypto.gostsignature.MODE_256,gostcrypto.gostsignature.CURVES_R_1323565_1_024_2019['id-tc26-gost-3410-2012-256-paramSetB'])signature=sign_obj.sign(private_key,digest)
public_key=bytearray.fromhex('fd21c21ab0dc84c154f3d218e9040bee64fff48bdff814b232295b09d0df72e45026dec9ac4f07061a2a01d7a2307e0659239a82a95862df86041d1458e45049')digest=bytearray.fromhex('2dfbc1b372d89a1188c09c52e0eec61fce52032ab1022e8e67ece6672b043ee5')signature=bytearray.fromhex('4b6dd64fa33820e90b14f8f4e49ee92eb2660f9eeb4e1b313517b6ba173979656df13cd4bceaf606ed32d410f48f2a5c2596c146e8c2fa4455d08cf68fc2b2a7')sign_obj=gostcrypto.gostsignature.new(gostcrypto.gostsignature.MODE_256,gostcrypto.gostsignature.CURVES_R_1323565_1_024_2019['id-tc26-gost-3410-2012-256-paramSetB'])ifsign_obj.verify(public_key,digest,signature):print('Signature is correct')else:print('Signature is not correct')
private_key=bytearray.fromhex('7a929ade789bb9be10ed359dd39a72c11b60961f49397eee1d19ce9891ec3b28')sign_obj=gostcrypto.gostsignature.new(gostcrypto.gostsignature.MODE_256,gostcrypto.gostsignature.CURVES_R_1323565_1_024_2019['id-tc26-gost-3410-2012-256-paramSetB'])public_key=sign_obj.public_key_generate(private_key)
importgostcryptosign_obj=gostcrypto.gostsignature.new(gostcrypto.gostsignature.MODE_256,gostcrypto.gostsignature.CURVES_R_1323565_1_024_2019['id-tc26-gost-3410-2012-256-paramSetB'])oid_name=sign_obj.oid.name
importgostcryptorand_k=bytearray([0x88,0x99,0xaa,0xbb,0xcc,0xdd,0xee,0xff,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0xfe,0xdc,0xba,0x98,0x76,0x54,0x32,0x10,0x01,0x23,0x45,0x67,0x89,0xab,0xcd,0xef,])random_obj=gostcrypto.gostrandom.new(32,rand_k=rand_k,size_s=gostcrypto.gostrandom.SIZE_S_256)random_result=random_obj.random()random_obj.clear()
importgostcryptokey=bytearray.fromhex('000102030405060708090a0b0c0d0e0f1011121315161718191a1b1c1d1e1f')data=bytearray.fromhex('0126bdb87800af214341456563780100')hmac_obj=gostcrypto.gosthmac.new('HMAC_GOSTR3411_2012_256',key,data=data)hmac_result=hmac_obj.digest()
In this case the 'buffer_size' value must be a multiple of the 'block_size' value.
importgostcryptokey=bytearray.fromhex('000102030405060708090a0b0c0d0e0f1011121315161718191a1b1c1d1e1f')data=bytearray.fromhex('0126bdb87800af214341456563780100')hmac_obj=gostcrypto.gosthmac.new('HMAC_GOSTR3411_2012_256',key,data=data)hmac_result=hmac_obj.digest()
importgostcryptokey=bytearray.fromhex('000102030405060708090a0b0c0d0e0f1011121315161718191a1b1c1d1e1f')hmac_obj=gostcrypto.gosthmac.new('HMAC_GOSTR3411_2012_256',key)oid_name=hmac_obj.oid.name
importgostcryptopassword=b'password'salt=b'salt'pbkdf_obj=gostcrypto.gostpbkdf.new(password,salt=salt,counter=4096)pbkdf_result=pbkdf_obj.derive(32)
MIT Copyright (c) 2020 Evgeny Drobotun
Documentation for using this package:https://gostcrypto.readthedocs.io/
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