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哪个提供商负责AES/CTR/NoPadding？

javacryptographyaesjcectr-mode
7

我的实现信息

下面的代码片段突出了我当前使用AES密码和CTR操作模式的加密对象实现。

import javax.crypto.Cipher;

public abstract class Crypto {

    private static final String CIPHER_ALGORITHM = "AES/CTR/NoPadding";
    private String AesKeyString = "ByWelFHCgFqivFZrWs89LQ==";

    private void setKey() throws NoSuchAlgorithmException{
        byte[] keyBytes;
        keyBytes = Base64.getDecoder().decode(AesKeyString);
        aesKey = new SecretKeySpec(keyBytes, "AES");
    }

    protected byte[] execute(int mode, byte[] target, byte[] iv) 
            throws Exception{
        Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
        IvParameterSpec ivSpec = new IvParameterSpec(iv);
        cipher.init(mode, aesKey, ivSpec);
        return cipher.doFinal(target);
    }

}

就我而言, getInstance() 方法返回一个实现所请求转换的 Cipher 对象，从支持此转换的第一个提供者开始。

接下来，这里有一个包含所有可用提供者的列表:

    SUN
    Alg.Alias.Signature.SHA1/DSA    SHA1withDSA
    Alg.Alias.Signature.1.2.840.10040.4.3   SHA1withDSA
    Alg.Alias.Signature.DSS SHA1withDSA
    SecureRandom.SHA1PRNG ImplementedIn Software
    KeyStore.JKS    sun.security.provider.JavaKeyStore$DualFormatJKS
    Alg.Alias.MessageDigest.SHA-1   SHA
    MessageDigest.SHA   sun.security.provider.SHA
    KeyStore.CaseExactJKS   sun.security.provider.JavaKeyStore$CaseExactJKS
    CertStore.com.sun.security.IndexedCollection ImplementedIn  Software
    Signature.SHA256withDSA sun.security.provider.DSA$SHA256withDSA
    Alg.Alias.MessageDigest.OID.1.3.14.3.2.26   SHA
    Alg.Alias.Signature.DSA SHA1withDSA
    KeyFactory.DSA ImplementedIn    Software
    KeyStore.JKS ImplementedIn  Software
    AlgorithmParameters.DSA ImplementedIn   Software
    Signature.NONEwithDSA   sun.security.provider.DSA$RawDSA
    Alg.Alias.CertificateFactory.X509   X.509
    Signature.SHA256withDSA SupportedKeyClasses java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey
    CertStore.com.sun.security.IndexedCollection    sun.security.provider.certpath.IndexedCollectionCertStore
    Provider.id className   sun.security.provider.Sun
    Alg.Alias.MessageDigest.1.3.14.3.2.26   SHA
    Alg.Alias.Signature.SHA-1/DSA   SHA1withDSA
    KeyStore.DKS    sun.security.provider.DomainKeyStore$DKS
    Alg.Alias.Signature.OID.2.16.840.1.101.3.4.3.2  SHA256withDSA
    CertificateFactory.X.509 ImplementedIn  Software
    Alg.Alias.Signature.OID.2.16.840.1.101.3.4.3.1  SHA224withDSA
    Signature.SHA1withDSA KeySize   1024
    Signature.NONEwithDSA KeySize   1024
    KeyFactory.DSA  sun.security.provider.DSAKeyFactory
    CertPathValidator.PKIX ImplementedIn    Software
    Configuration.JavaLoginConfig   sun.security.provider.ConfigFile$Spi
    Alg.Alias.Signature.OID.1.2.840.10040.4.3   SHA1withDSA
    Alg.Alias.MessageDigest.OID.2.16.840.1.101.3.4.2.4  SHA-224
    Alg.Alias.KeyFactory.1.2.840.10040.4.1  DSA
    MessageDigest.MD5 ImplementedIn Software
    Alg.Alias.MessageDigest.OID.2.16.840.1.101.3.4.2.3  SHA-512
    Alg.Alias.MessageDigest.OID.2.16.840.1.101.3.4.2.2  SHA-384
    Alg.Alias.MessageDigest.OID.2.16.840.1.101.3.4.2.1  SHA-256
    Alg.Alias.Signature.RawDSA  NONEwithDSA
    Provider.id name    SUN
    Alg.Alias.AlgorithmParameters.1.2.840.10040.4.1 DSA
    CertPathBuilder.PKIX ValidationAlgorithm    RFC3280
    Policy.JavaPolicy   sun.security.provider.PolicySpiFile
    Alg.Alias.AlgorithmParameters.OID.1.2.840.10040.4.1 DSA
    Signature.SHA224withDSA KeySize 2048
    Alg.Alias.AlgorithmParameters.1.3.14.3.2.12 DSA
    Alg.Alias.Signature.SHA/DSA SHA1withDSA
    Alg.Alias.KeyPairGenerator.1.3.14.3.2.12    DSA
    MessageDigest.SHA-384   sun.security.provider.SHA5$SHA384
    MessageDigest.SHA-224   sun.security.provider.SHA2$SHA224
    Signature.SHA1withDSA ImplementedIn Software
    AlgorithmParameterGenerator.DSA sun.security.provider.DSAParameterGenerator
    Signature.NONEwithDSA SupportedKeyClasses   java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey
    MessageDigest.SHA-512   sun.security.provider.SHA5$SHA512
    Alg.Alias.KeyFactory.OID.1.2.840.10040.4.1  DSA
    CertPathBuilder.PKIX    sun.security.provider.certpath.SunCertPathBuilder
    Alg.Alias.Signature.1.3.14.3.2.27   SHA1withDSA
    Alg.Alias.MessageDigest.2.16.840.1.101.3.4.2.4  SHA-224
    CertPathBuilder.PKIX ImplementedIn  Software
    Alg.Alias.MessageDigest.2.16.840.1.101.3.4.2.3  SHA-512
    Provider.id version 1.8
    Alg.Alias.MessageDigest.2.16.840.1.101.3.4.2.2  SHA-384
    Alg.Alias.MessageDigest.2.16.840.1.101.3.4.2.1  SHA-256
    Signature.SHA256withDSA KeySize 2048
    AlgorithmParameters.DSA sun.security.provider.DSAParameters
    Signature.SHA1withDSA SupportedKeyClasses   java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey
    CertStore.Collection    sun.security.provider.certpath.CollectionCertStore
    AlgorithmParameterGenerator.DSA ImplementedIn   Software
    KeyPairGenerator.DSA KeySize    2048
    CertStore.LDAP  sun.security.provider.certpath.ldap.LDAPCertStore
    Alg.Alias.Signature.2.16.840.1.101.3.4.3.2  SHA256withDSA
    CertificateFactory.X.509    sun.security.provider.X509Factory
    Alg.Alias.Signature.2.16.840.1.101.3.4.3.1  SHA224withDSA
    CertStore.LDAP LDAPSchema   RFC2587
    KeyPairGenerator.DSA ImplementedIn  Software
    CertStore.LDAP ImplementedIn    Software
    CertPathValidator.PKIX ValidationAlgorithm  RFC3280
    Signature.SHA224withDSA sun.security.provider.DSA$SHA224withDSA
    CertStore.Collection ImplementedIn  Software
    Alg.Alias.Signature.1.3.14.3.2.13   SHA1withDSA
    CertPathValidator.PKIX  sun.security.provider.certpath.PKIXCertPathValidator
    Alg.Alias.MessageDigest.SHA1    SHA
    AlgorithmParameterGenerator.DSA KeySize 2048
    SecureRandom.SHA1PRNG   sun.security.provider.SecureRandom
    Signature.SHA1withDSA   sun.security.provider.DSA$SHA1withDSA
    Alg.Alias.KeyFactory.1.3.14.3.2.12  DSA
    KeyPairGenerator.DSA    sun.security.provider.DSAKeyPairGenerator
    MessageDigest.SHA ImplementedIn Software
    Provider.id info    SUN (DSA key/parameter generation; DSA signing; SHA-1, MD5 digests; SecureRandom; X.509 certificates; JKS & DKS keystores; PKIX CertPathValidator; PKIX CertPathBuilder; LDAP, Collection CertStores, JavaPolicy Policy; JavaLoginConfig Configuration)
    Alg.Alias.KeyPairGenerator.1.2.840.10040.4.1    DSA
    MessageDigest.SHA-256   sun.security.provider.SHA2$SHA256
    Alg.Alias.Signature.DSAWithSHA1 SHA1withDSA
    MessageDigest.MD5   sun.security.provider.MD5
    Alg.Alias.Signature.SHAwithDSA  SHA1withDSA
    Alg.Alias.KeyPairGenerator.OID.1.2.840.10040.4.1    DSA
    Signature.SHA224withDSA SupportedKeyClasses java.security.interfaces.DSAPublicKey|java.security.interfaces.DSAPrivateKey
    MessageDigest.MD2   sun.security.provider.MD2
SunRsaSign
    Signature.SHA224withRSA SupportedKeyClasses java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.2    MD2withRSA
    Provider.id name    SunRsaSign
    Signature.SHA224withRSA sun.security.rsa.RSASignature$SHA224withRSA
    Signature.SHA512withRSA sun.security.rsa.RSASignature$SHA512withRSA
    Signature.MD5withRSA SupportedKeyClasses    java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Signature.MD2withRSA    sun.security.rsa.RSASignature$MD2withRSA
    Signature.MD2withRSA SupportedKeyClasses    java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Alg.Alias.KeyPairGenerator.OID.1.2.840.113549.1.1   RSA
    Provider.id version 1.8
    KeyFactory.RSA  sun.security.rsa.RSAKeyFactory
    Signature.SHA512withRSA SupportedKeyClasses java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Signature.MD5withRSA    sun.security.rsa.RSASignature$MD5withRSA
    Signature.SHA256withRSA sun.security.rsa.RSASignature$SHA256withRSA
    Alg.Alias.KeyFactory.OID.1.2.840.113549.1.1 RSA
    Signature.SHA1withRSA SupportedKeyClasses   java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.14   SHA224withRSA
    Alg.Alias.KeyPairGenerator.1.2.840.113549.1.1   RSA
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.13   SHA512withRSA
    Signature.SHA256withRSA SupportedKeyClasses java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.12   SHA384withRSA
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.11   SHA256withRSA
    Provider.id info    Sun RSA signature provider
    Signature.SHA1withRSA   sun.security.rsa.RSASignature$SHA1withRSA
    Signature.SHA384withRSA sun.security.rsa.RSASignature$SHA384withRSA
    Alg.Alias.Signature.1.3.14.3.2.29   SHA1withRSA
    Alg.Alias.Signature.1.2.840.113549.1.1.14   SHA224withRSA
    Alg.Alias.Signature.1.2.840.113549.1.1.13   SHA512withRSA
    Alg.Alias.Signature.1.2.840.113549.1.1.5    SHA1withRSA
    Alg.Alias.Signature.1.2.840.113549.1.1.12   SHA384withRSA
    Provider.id className   sun.security.rsa.SunRsaSign
    Alg.Alias.Signature.1.2.840.113549.1.1.4    MD5withRSA
    Alg.Alias.Signature.1.2.840.113549.1.1.11   SHA256withRSA
    Alg.Alias.KeyFactory.1.2.840.113549.1.1 RSA
    KeyPairGenerator.RSA    sun.security.rsa.RSAKeyPairGenerator
    Alg.Alias.Signature.1.2.840.113549.1.1.2    MD2withRSA
    Signature.SHA384withRSA SupportedKeyClasses java.security.interfaces.RSAPublicKey|java.security.interfaces.RSAPrivateKey
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.5    SHA1withRSA
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.4    MD5withRSA
SunEC
    AlgorithmParameters.EC  sun.security.ec.ECParameters
    KeyAgreement.ECDH SupportedKeyClasses   java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    Signature.SHA256withECDSA ImplementedIn Software
    Provider.id name    SunEC
    Signature.NONEwithECDSA SupportedKeyClasses java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    Signature.SHA224withECDSA ImplementedIn Software
    Signature.SHA1withECDSA sun.security.ec.ECDSASignature$SHA1
    Alg.Alias.Signature.OID.1.2.840.10045.4.1   SHA1withECDSA
    Signature.SHA256withECDSA SupportedKeyClasses   java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    Signature.SHA224withECDSA SupportedKeyClasses   java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    KeyPairGenerator.EC KeySize 256
    KeyFactory.EC ImplementedIn Software
    Provider.id version 1.8
    AlgorithmParameters.EC KeySize  256
    Signature.NONEwithECDSA sun.security.ec.ECDSASignature$Raw
    Signature.SHA512withECDSA ImplementedIn Software
    Alg.Alias.KeyFactory.EllipticCurve  EC
    Signature.SHA256withECDSA   sun.security.ec.ECDSASignature$SHA256
    Alg.Alias.KeyPairGenerator.EllipticCurve    EC
    Signature.SHA512withECDSA   sun.security.ec.ECDSASignature$SHA512
    Signature.SHA1withECDSA KeySize 256
    Signature.SHA1withECDSA SupportedKeyClasses java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    Signature.SHA384withECDSA SupportedKeyClasses   java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    Alg.Alias.AlgorithmParameters.EllipticCurve EC
    Alg.Alias.AlgorithmParameters.1.2.840.10045.2.1 EC
    Alg.Alias.Signature.1.2.840.10045.4.1   SHA1withECDSA
    Signature.SHA224withECDSA   sun.security.ec.ECDSASignature$SHA224
    Signature.SHA384withECDSA ImplementedIn Software
    AlgorithmParameters.EC ImplementedIn    Software
    Provider.id info    Sun Elliptic Curve provider (EC, ECDSA, ECDH)
    Signature.SHA512withECDSA SupportedKeyClasses   java.security.interfaces.ECPublicKey|java.security.interfaces.ECPrivateKey
    KeyPairGenerator.EC sun.security.ec.ECKeyPairGenerator
    Alg.Alias.Signature.OID.1.2.840.10045.4.3.4 SHA512withECDSA
    Alg.Alias.Signature.OID.1.2.840.10045.4.3.3 SHA384withECDSA
    Alg.Alias.Signature.OID.1.2.840.10045.4.3.2 SHA256withECDSA
    KeyAgreement.ECDH   sun.security.ec.ECDHKeyAgreement
    Alg.Alias.Signature.OID.1.2.840.10045.4.3.1 SHA224withECDSA
    Alg.Alias.Signature.1.2.840.10045.4.3.4 SHA512withECDSA
    Alg.Alias.Signature.1.2.840.10045.4.3.3 SHA384withECDSA
    Signature.SHA384withECDSA   sun.security.ec.ECDSASignature$SHA384
    Alg.Alias.Signature.1.2.840.10045.4.3.2 SHA256withECDSA
    Alg.Alias.Signature.1.2.840.10045.4.3.1 SHA224withECDSA
    AlgorithmParameters.EC SupportedCurves  [secp112r1,1.3.132.0.6]|[secp112r2,1.3.132.0.7]|[secp128r1,1.3.132.0.28]|[secp128r2,1.3.132.0.29]|[secp160k1,1.3.132.0.9]|[secp160r1,1.3.132.0.8]|[secp160r2,1.3.132.0.30]|[secp192k1,1.3.132.0.31]|[secp192r1,NIST P-192,X9.62 prime192v1,1.2.840.10045.3.1.1]|[secp224k1,1.3.132.0.32]|[secp224r1,NIST P-224,1.3.132.0.33]|[secp256k1,1.3.132.0.10]|[secp256r1,NIST P-256,X9.62 prime256v1,1.2.840.10045.3.1.7]|[secp384r1,NIST P-384,1.3.132.0.34]|[secp521r1,NIST P-521,1.3.132.0.35]|[X9.62 prime192v2,1.2.840.10045.3.1.2]|[X9.62 prime192v3,1.2.840.10045.3.1.3]|[X9.62 prime239v1,1.2.840.10045.3.1.4]|[X9.62 prime239v2,1.2.840.10045.3.1.5]|[X9.62 prime239v3,1.2.840.10045.3.1.6]|[sect113r1,1.3.132.0.4]|[sect113r2,1.3.132.0.5]|[sect131r1,1.3.132.0.22]|[sect131r2,1.3.132.0.23]|[sect163k1,NIST K-163,1.3.132.0.1]|[sect163r1,1.3.132.0.2]|[sect163r2,NIST B-163,1.3.132.0.15]|[sect193r1,1.3.132.0.24]|[sect193r2,1.3.132.0.25]|[sect233k1,NIST K-233,1.3.132.0.26]|[sect233r1,NIST B-233,1.3.132.0.27]|[sect239k1,1.3.132.0.3]|[sect283k1,NIST K-283,1.3.132.0.16]|[sect283r1,NIST B-283,1.3.132.0.17]|[sect409k1,NIST K-409,1.3.132.0.36]|[sect409r1,NIST B-409,1.3.132.0.37]|[sect571k1,NIST K-571,1.3.132.0.38]|[sect571r1,NIST B-571,1.3.132.0.39]|[X9.62 c2tnb191v1,1.2.840.10045.3.0.5]|[X9.62 c2tnb191v2,1.2.840.10045.3.0.6]|[X9.62 c2tnb191v3,1.2.840.10045.3.0.7]|[X9.62 c2tnb239v1,1.2.840.10045.3.0.11]|[X9.62 c2tnb239v2,1.2.840.10045.3.0.12]|[X9.62 c2tnb239v3,1.2.840.10045.3.0.13]|[X9.62 c2tnb359v1,1.2.840.10045.3.0.18]|[X9.62 c2tnb431r1,1.2.840.10045.3.0.20]|[brainpoolP160r1,1.3.36.3.3.2.8.1.1.1]|[brainpoolP192r1,1.3.36.3.3.2.8.1.1.3]|[brainpoolP224r1,1.3.36.3.3.2.8.1.1.5]|[brainpoolP256r1,1.3.36.3.3.2.8.1.1.7]|[brainpoolP320r1,1.3.36.3.3.2.8.1.1.9]|[brainpoolP384r1,1.3.36.3.3.2.8.1.1.11]|[brainpoolP512r1,1.3.36.3.3.2.8.1.1.13]
    Provider.id className   sun.security.ec.SunEC
    Signature.NONEwithECDSA ImplementedIn   Software
    Signature.SHA1withECDSA ImplementedIn   Software
    KeyPairGenerator.EC ImplementedIn   Software
    KeyFactory.EC   sun.security.ec.ECKeyFactory
    KeyAgreement.ECDH ImplementedIn Software
SunJSSE
    Signature.MD5andSHA1withRSA sun.security.ssl.RSASignature
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.2    MD2withRSA
    Alg.Alias.KeyManagerFactory.PKIX    NewSunX509
    Provider.id name    SunJSSE
    KeyManagerFactory.NewSunX509    sun.security.ssl.KeyManagerFactoryImpl$X509
    Alg.Alias.Signature.OID.1.3.14.3.2.29   SHA1withRSA
    Signature.MD2withRSA    sun.security.rsa.RSASignature$MD2withRSA
    Alg.Alias.KeyPairGenerator.OID.1.2.840.113549.1.1   RSA
    Provider.id version 1.8
    KeyManagerFactory.SunX509   sun.security.ssl.KeyManagerFactoryImpl$SunX509
    KeyFactory.RSA  sun.security.rsa.RSAKeyFactory
    TrustManagerFactory.SunX509 sun.security.ssl.TrustManagerFactoryImpl$SimpleFactory
    Alg.Alias.TrustManagerFactory.X.509 PKIX
    SSLContext.TLSv1.2  sun.security.ssl.SSLContextImpl$TLS12Context
    SSLContext.TLSv1.1  sun.security.ssl.SSLContextImpl$TLS11Context
    Signature.MD5withRSA    sun.security.rsa.RSASignature$MD5withRSA
    Alg.Alias.SSLContext.SSLv3  TLSv1
    Alg.Alias.SSLContext.SSL    TLS
    KeyStore.PKCS12 sun.security.pkcs12.PKCS12KeyStore
    Alg.Alias.TrustManagerFactory.SunPKIX   PKIX
    Alg.Alias.KeyFactory.OID.1.2.840.113549.1.1 RSA
    SSLContext.Default  sun.security.ssl.SSLContextImpl$DefaultSSLContext
    Alg.Alias.KeyPairGenerator.1.2.840.113549.1.1   RSA
    Provider.id info    Sun JSSE provider(PKCS12, SunX509/PKIX key/trust factories, SSLv3/TLSv1/TLSv1.1/TLSv1.2)
    Signature.SHA1withRSA   sun.security.rsa.RSASignature$SHA1withRSA
    TrustManagerFactory.PKIX    sun.security.ssl.TrustManagerFactoryImpl$PKIXFactory
    SSLContext.TLS  sun.security.ssl.SSLContextImpl$TLSContext
    SSLContext.TLSv1    sun.security.ssl.SSLContextImpl$TLS10Context
    Alg.Alias.Signature.1.3.14.3.2.29   SHA1withRSA
    Alg.Alias.Signature.1.2.840.113549.1.1.5    SHA1withRSA
    Alg.Alias.TrustManagerFactory.X509  PKIX
    Provider.id className   com.sun.net.ssl.internal.ssl.Provider
    Alg.Alias.Signature.1.2.840.113549.1.1.4    MD5withRSA
    Alg.Alias.KeyFactory.1.2.840.113549.1.1 RSA
    KeyPairGenerator.RSA    sun.security.rsa.RSAKeyPairGenerator
    Alg.Alias.Signature.1.2.840.113549.1.1.2    MD2withRSA
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.5    SHA1withRSA
    Alg.Alias.Signature.OID.1.2.840.113549.1.1.4    MD5withRSA

尽管我没有看到任何提供商支持"AES/CTR/NoPadding"算法，但execute()方法没有抛出NoSuchAlgorithmException，因此我认为先前的某个提供商支持此算法。

问题

  • 调用了哪个先前的提供商以获取支持"AES/CTR/NoPadding"算法的所需密码对象？

注

提供商列表过长，无法适应此帖子，请告知如果您需要有关未提及的特定提供商的任何信息。

@zaph 我已经阅读了 javax.crypto.Cipher 源代码，但我仍然找不到我要寻找的答案。 - Ricardo Miranda
1
AESCipher 类 是第一选择，因为它是 CipherSpi 的一部分，因此属于提供程序。我仍然没有弄清楚它如何加载到线程中。 - Artjom B.
3
关于您的附加问题......我从未见过在任何地方实际实施“128位随机数与m位计数器值（通常为32位）进行异或”的情况。通常只是将随机数和计数器简单地连接起来。有些实现只在计数器部分进行计数。其他一些则将整个随机数和计数器视为计数器，如果明文足够长，则随机数部分可能会发生变化。 - Artjom B.
1
嗨，Ricardo，欢迎来到StackOverflow！正如您所看到的，您的问题在这里得到了很好的回应。但是它有一个问题：它由两个相当独立的问题组成：1：如何确定所使用的提供程序；2：如何处理AES / CTR的IV / Nonce / Counter以用于此AES / CTR实现。下次请分别提出两个问题。如果您将此问题分成两个部分，请在下面评论中使用@MaartenBodewes，以便我也可以将我的答案分成两个部分。 - Maarten Bodewes
1
@Maarten 你可以分割它：http://stackoverflow.com/q/42836844 - Artjom B.
显示剩余6条评论
1个回答
9
你可以在任何Cipher（或MessageDigest等）上调用getProvider()。如果你使用“AES/GCM/NoPadding”对Cipher调用该方法，你将得到SunJCE提供程序。当然，你不会得到额外的服务信息。
要获取有关AES密码的服务信息，请尝试以下代码：
public static void main(String[] args) {
    Provider[] provs = Security.getProviders();
    for (Provider provider : provs) {
        Service service = provider.getService("Cipher", "AES");
        if (service == null) {
            continue;
        }

        String modes = service.getAttribute("SupportedModes");
        if (modes != null && modes.matches("(?i).*CTR.*")) {
            System.out.println(service);
        }
    }
}

这将会输出：

SunJCE: Cipher.AES -> com.sun.crypto.provider.AESCipher$General
  aliases: [Rijndael]
  attributes: {SupportedPaddings=NOPADDING|PKCS5PADDING|ISO10126PADDING, SupportedKeyFormats=RAW, SupportedModes=ECB|CBC|PCBC|CTR|CTS|CFB|OFB|CFB8|CFB16|CFB24|CFB32|CFB40|CFB48|CFB56|CFB64|OFB8|OFB16|OFB24|OFB32|OFB40|OFB48|OFB56|OFB64|GCM|CFB72|CFB80|CFB88|CFB96|CFB104|CFB112|CFB120|CFB128|OFB72|OFB80|OFB88|OFB96|OFB104|OFB112|OFB120|OFB128}

所以，您现在拥有AES、CTR和NoPadding。诚然，Provider的Service接口描述不太清晰，需要一些琢磨才能得到这些信息。
非常棒的答案，完整而实用！非常感谢Maarten，您解决了我的疑惑。 - Ricardo Miranda
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