密钥拓展的过程和加解密大同小异 输入的原始密钥 key 为 128bit 的数据,将其按位拆分成 4 个 32bit 的数据 K0,K1,K2,K3 将初始密钥 K0,K1,K2,K3 分别异或固定参数 FK0,FK1,FK2,FK3 得到用于循环的密钥 k0,k1,k2,k3 即k0=K0⊕FK0,k1=K1⊕FK1,k2=K2⊕FK2,k3=K3⊕FK3 进入轮密钥 rki 的...
public static byte[] encrypt(byte[] data, PublicKey publicKey) { ECPublicKeyParameters localECPublicKeyParameters = null; if (publicKey instanceof BCECPublicKey) { BCECPublicKey localECPublicKey = (BCECPublicKey) publicKey; ECParameterSpec localECParameterSpec = localECPublicKey.getParameters(...
importorg.bouncycastle.jce.provider.BouncyCastleProvider;importjavax.crypto.Cipher;importjavax.crypto.spec.SecretKeySpec;importjava.security.Security;publicclassSM4Example{publicstaticvoidmain(String[]args)throwsException{Security.addProvider(newBouncyCastleProvider());// 密钥byte[]key="1234567890abcdef".getByte...
function get_pointJson(coordinate,secretKey){ var result = sm4.encrypt(coordinate, secretKey); return result; } function get_captchCode(token,coordinate,secretKey) { var message = token + "---" + coordinate; var result = sm4.encrypt(message, secretKey); ...
Related-Key Security for Hybrid Encryption Summary: We prove that, for a KEM/Tag-DEM (Key Encapsulation Mechanism/ Tag Data Encapsulation Mechanism) hybrid encryption scheme, if the adaptive chosen ... X Lu,L Bao,D Jia - Springer International Publishing 被引量: 15发表: 2014年 DES和SM4算法...
[0062] 2)密钥项(key),可选项,需要更新密钥(即改变密钥)时,才包含,且将key_updt字段置1; [0063] 3)随机数项(rand),可选项,对于CBC等分组工作模式,该项为其初始向量;每次加/解密仅需包含一次,且将is_rand字段置1 ; [0064] 4)数据项(data),必选项,待加/解密的数据,其长度必须为128位倍数卿4n个字)...
g=epoint_init();epoint_set(x,y,0,g);irand(time(NULL));bigrand(n,key1);///私钥dbecurve_mult(key1,g,g);//计算Pbepoint_get(g,x,y);*wxlen=big_to_bytes(32, x,(char*)wx, TRUE);*wylen=big_to_bytes(32, y,(char*)wy, TRUE);*privkeylen=big_to_bytes(32, key1,(char...
SM4_DECRYPTdefsm4_decrypt(key,ciphertext):crypt_sm4=CryptSM4()crypt_sm4.set_key(key,SM4_DECRYPT)plaintext=crypt_sm4.crypt_cbc(ciphertext)returnplaintext# 设置密钥和密文key=b'0123456789abcdeffedcba9876543210'ciphertext=b'8d23c3f8d0b5d237a9262f2d2ab4e1f2'# 解密密文plaintext=sm4_decrypt(key,...
importjava.security.SecureRandom;publicclassSM4KeyGenerator{publicstaticbyte[]generateKey(){byte[]key=newbyte[16];// SM4密钥长度为128位SecureRandomrandom=newSecureRandom();random.nextBytes(key);returnkey;}} 1. 2. 3. 4. 5. 6. 7. 8.