Method getHash

app/src/main/java/eu/faircode/email/Helper.java:3279–3288

(InputStream is, String algorithm)

    }

    static String getHash(InputStream is, String algorithm) throws NoSuchAlgorithmException, IOException {
        MessageDigest digest = MessageDigest.getInstance(algorithm);

        int count;
        byte[] buffer = new byte[BUFFER_SIZE];
        while ((count = is.read(buffer)) != -1)
            digest.update(buffer, 0, count);

        return hex(digest.digest());
    }

    static String hex(byte[] bytes) {
        StringBuilder sb = new StringBuilder();