in src/main/java/org/apache/sling/discovery/base/connectors/ping/TopologyRequestValidator.java [320:329]
private String hash(String toHash) {
try {
MessageDigest m = MessageDigest.getInstance("SHA-256");
return new String(Base64.encodeBase64(m.digest(toHash.getBytes("UTF-8"))), "UTF-8");
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e.getMessage(), e);
} catch (UnsupportedEncodingException e) {
throw new RuntimeException(e.getMessage(), e);
}
}