Insecure Hash Functions

[xingweitian]

Hi there, we found that the following places using insecure hash functions:

/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/Digest.java:19: error: [algorithm.not.allowed] Algorithm: MD5 is not allowed by the current rules
			MessageDigest md = MessageDigest.getInstance("MD5");
			                                             ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/Digest.java:33: error: [algorithm.not.allowed] Algorithm: MD5 is not allowed by the current rules
			MessageDigest md = MessageDigest.getInstance("MD5");
			                                             ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/Digest.java:66: error: [algorithm.not.allowed] Algorithm: MD5 is not allowed by the current rules
			md = MessageDigest.getInstance("MD5");
			                               ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/Digest.java:102: error: [algorithm.not.allowed] Algorithm: SHA is not allowed by the current rules
			md = MessageDigest.getInstance("SHA");
			                               ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/Digest.java:132: error: [algorithm.not.allowed] Algorithm: SHA is not allowed by the current rules
			md = MessageDigest.getInstance("SHA");
			                               ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/Digest.java:162: error: [algorithm.not.allowed] Algorithm: SHA1 is not allowed by the current rules
			MessageDigest md = MessageDigest.getInstance("SHA1");
			                                             ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/EncryptionUtil.java:23: error: [algorithm.not.allowed] Algorithm: MD5 is not allowed by the current rules
            MessageDigest md = MessageDigest.getInstance("MD5");
                                                         ^
/home/xwt/IdeaProjects/aes-rsa-java/src/main/java/com/wustrive/aesrsa/util/EncryptionUtil.java:57: error: [algorithm.not.allowed] Algorithm: SHA-1 is not allowed by the current rules
            MessageDigest md = MessageDigest.getInstance("SHA-1");
                                                         ^