com.qcloud.cos.internal.crypto.COSKeyWrapScheme Maven / Gradle / Ivy

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java sdk for qcloud cos

There is a newer version: 5.6.238.2

package com.qcloud.cos.internal.crypto;

import java.security.Key;

class COSKeyWrapScheme {
    public static final String AESWrap = "AESWrap"; 
    public static final String RSA_ECB_OAEPWithSHA256AndMGF1Padding = "RSA/ECB/OAEPWithSHA-256AndMGF1Padding";

    /**
     * @param kek
     *            the key encrypting key, which is either an AES key or a public
     *            key
     */
    String getKeyWrapAlgorithm(Key kek) {
        String algorithm = kek.getAlgorithm();
        if (COSCryptoScheme.AES.equals(algorithm)) {
            return AESWrap;
        }
        if (COSCryptoScheme.RSA.equals(algorithm)) {
            if (CryptoRuntime.isRsaKeyWrapAvailable())
                return RSA_ECB_OAEPWithSHA256AndMGF1Padding;
        }
        throw new IllegalArgumentException("Unsupported key wrap algorithm " + algorithm);
    }

    @Override public String toString() { return "COSKeyWrapScheme"; }
}