(ciphertext[:24]) ct = base64.b64decode(ciphertext[24:]) cipher = AES.new(key, AES.MODE_CBC, iv) pt = unpad(cipher.decrypt(ct), AES.block_块大小) return pt.decode('utf-8') # 示例密钥和明文 key = get_random_bytes(16) # 16字节密钥,对应AES-128 plaintext = "Hello, AES!"...
审计代码,发现是一个 AES 和维吉尼亚密码的混合,加密思路如下: fromCrypto.Util.Paddingimportpad, unpadfromCrypto.Randomimportget_random_bytesfromCrypto.CipherimportAESfromsecretimportflag, key dict1 = {'A':0,'B':1,'C':2,'D':3,'E':4,'F':5,'G':6,'H':7,'I':8,'J':9,'K':10,'...
q=int(iroot(Q,2)[0]) print(long_to_bytes(int(pow(c,invert(e,(p-1)*(q-1)),p*q))) mitm fromCrypto.Util.numberimport* fromCrypto.Util.Paddingimport* fromhashlibimportsha256 fromCrypto.CipherimportAES fromrandomimport* fromsecretimportflag note =b'Crypt_AES*42$@' r =4 keys = []...
以下是使用pycryptodome库进行AES加密的示例代码: fromCrypto.CipherimportAESfromCrypto.Util.Paddingimportpad,unpadfromCrypto.Randomimportget_random_bytes key=get_random_bytes(16)cipher=AES.new(key,AES.MODE_CBC)data=b"Hello, world!"padded_data=pad(data,AES.block_size)encrypted_data=cipher.encrypt(padd...
import random key=random.getrandbits(16,"big")#返回指定大小的整数(以位为单位) 1. 2. random是一个伪随机数生成包,不是一个好的生成器。生成的数字在人看来时随机的,但是在给定随机种子的情况下总是相同的。默认种子时基于系统时间的。 从os.urandom()或者secrets.SystemRandom()足够安全 ...
defget_gift(p,q):noise=getPrime(40)p,q=p+2*noise+1,q-pow(noise,2)gift=2024*(p+q)returngiftp=getPrime(512)q=getPrime(512)n=p*qe=0x10001m=bytes_to_long(flag) 题目分析: 先可以把式子变形为(p+q)-(r-1)**2+2,p,q为512位,noise的位数为40,显然gift泄露了p+q的高位 ...
35 + def tsb_encrypt(aes, msg): 36 + msg = pad(msg) 37 + iv = get_random_bytes(16) 38 + prev_pt = iv 39 + prev_ct = iv 40 + ct = '' 41 + for block in split_by(msg, 16) + [iv]: 42 + ct_block = xor(block, prev_pt) 43 + ct_block = aes.encryp...
[*] Got 301 bytes of ELF data so far. [*] Got 402 bytes of ELF data so far. [*] Got 501 bytes of ELF data so far. [*] Got 602 bytes of ELF data so far. [*] Got 701 bytes of ELF data so far. [*] Got 820 bytes of ELF data so far. [*] Got 902 bytes of ELF ...
kick_out] lat = [] for i,a in enumerate(new_set): lat.append([1*(j==i) for j in range(n-r)] + [N*a] + [N]) lat.append([0]*(n-r) + [N*s] + [k*N]) shuffle(lat, random=rand.random) m = matrix(ZZ, lat) #t_BKZ = cputime() m_BKZ = m.BKZ(block_size=...
AES.IV = key.GetBytes(AES.BlockSize /8); AES.Mode = CipherMode.CBC; using (var cs = new CryptoStream(ms, AES.CreateDecryptor(), CryptoStreamMode.Write)) { cs.Write(bytesToBeDecrypted,0, bytesToBeDecrypted.Length); cs.Close();