Briefly, this error occurs when Elasticsearch cannot verify the signature of a credential. This could be due to an incorrect or expired credential, or a mismatch between the credential and the signature. To resolve this issue, you can try the following: 1) Check and ensure that the credential is correct and not expired. 2) Verify that the signature matches the credential. 3) If the credential is part of a key pair, ensure that the correct key pair is being used. 4) If the error persists, consider generating a new credential and signature.
This guide will help you check for common problems that cause the log ” Signature verification failed for credential [{}] ” to appear. To understand the issues related to this log, read the explanation below about the following Elasticsearch concepts: plugin.
Log Context
Log “Signature verification failed for credential [{}]” classname is SamlAuthnRequestValidator.java.
We extracted the following from Elasticsearch source code for those seeking an in-depth context :
return sig.verify(signatureBytes);
} catch (NoSuchAlgorithmException e) {
throw new ElasticsearchSecurityException("Java signature algorithm [{}] is not available for SAML/XML-Sig algorithm [{}]";
e; javaSigAlgorithm; queryString.sigAlg);
} catch (InvalidKeyException | SignatureException e) {
logger.warn(new ParameterizedMessage("Signature verification failed for credential [{}]";
samlFactory.describeCredentials(new HashSet(Collections.singletonList(credential)))); e);
return false;
}
});
}
