java - Tomcat 7 : SecureRandomAlgorithm

Question

在 Tomcat 7.0.30 代码中:

org.apache.catalina.session.ManagerBase 类:代码片段

/**
 * The name of the algorithm to use to create instances of
 * {@link java.security.SecureRandom} which are used to generate session IDs.
 * If no algorithm is specified, SHA1PRNG is used. To use the platform
 * default (which may be SHA1PRNG), specify the empty string. If an invalid
 * algorithm and/or provider is specified the SecureRandom instances will be
 * created using the defaults. If that fails, the SecureRandom instances
 * will be created using platform defaults.
 */
protected String secureRandomAlgorithm = "SHA1PRNG";

    /**
 * Return the secure random number generator algorithm name.
 */
public String getSecureRandomAlgorithm() {
    return secureRandomAlgorithm;
}


/**
 * Set the secure random number generator algorithm name.
 *
 * @param secureRandomAlgorithm The new secure random number generator
 *                              algorithm name
 */
public void setSecureRandomAlgorithm(String secureRandomAlgorithm) {
    this.secureRandomAlgorithm = secureRandomAlgorithm;
}

这里默认使用SHA1PRNG。我可以在这里使用所有可能的算法。是否有可用的列表。

我看过link . SecureRandomAlgorithm 部分仅给出了SHA1PRNG。

Answer 1

似乎只实现了 SHA1PRNG。也许尝试 Security.getAlgorithms(String serviceName) 看看，是否还有其他的？看这里:http://docs.oracle.com/javase/7/docs/api/java/security/Security.html#getAlgorithms%28java.lang.String%29在这里:http://docs.oracle.com/javase/7/docs/api/java/security/SecureRandom.html#SecureRandom%28%29