apereo/cas · warning

Error encrypting using provider

Error message

Error encrypting using provider: [{}] and algorithm: [{}], Message: [{}]

What it means

Also in JasyptTestAlgorithmsCommand.validateAlgorithms: when the test cipher operation throws and the cause is NOT a NoSuchAlgorithmException, this warning reports the provider, algorithm, and exception message. Any other failure (bad key size, invalid parameters, I/O) during the encrypt/decrypt probe lands here.

Solutions

1. Read the Message parameter in the log for the underlying cause (e.g. 'Illegal key size').
2. On JDK 8, install the JCE Unlimited Strength policy files or move to JDK 11+.
3. Skip the failing provider/algorithm combination and choose one that validates cleanly.

Example fix

// before
// JDK 8, 256-bit key -> InvalidKeyException: Illegal key size
// after
// run CAS shell on JDK 11+ where unlimited crypto is default

// Verify key size compliance before testing:
int maxKey = Cipher.getMaxAllowedKeyLength(algorithm);
if (maxKey < requiredKeyBits) throw new IllegalStateException("Illegal key size for " + algorithm);

try {
    cipher.encryptValue(value);
} catch (Exception e) {
    LOGGER.warn("Probe failed for provider [{}] algorithm [{}]: [{}]", provider, algorithm, e.getMessage());
}

When it happens

Trigger: Cipher.init/encrypt/decrypt throwing InvalidKeyException (illegal key size without JCE unlimited policy), InvalidParameterSpecException, InvalidAlgorithmParameterException, or any other runtime error for a given provider/algorithm pair.

Common situations: JDK 8 with restricted crypto policy and 256-bit keys; algorithm requires algorithm-specific parameters (salt/IV size) the command's defaults don't satisfy; provider initialized incorrectly.

Understand the failure class

Background: "Must be a positive integer", "Invalid value", "Unsupported": the invalid-argument-value error family, when a library rejects the value you pass — this error's family across 35 libraries.

Related errors

• Provider: [ ] does not support Algorithm: [ ]
• Encrypted Value: [ ] Decryption Failed
• Unsupported key type:
• No federation keys defined for entity
• Unable to validate JWT signature

AI-assisted analysis of apereo/cas@e7288fc434 (2026-09-08). Data as JSON: /api/errors/21501987052f9a01. Report an issue: GitHub.

Appendix: source

Thrown at support/cas-server-support-shell-core/src/main/java/org/apereo/cas/shell/commands/jasypt/JasyptTestAlgorithmsCommand.java:68

                    val encryptedValue = cipher.encryptValue(value, e -> {
                        LOGGER.trace(e.getMessage(), e);
                        return null;
                    });
                    if (encryptedValue == null) {
                        continue;
                    }
                    LOGGER.info("Provider: [{}] Algorithm: [{}]", provider, algorithmStr);
                    val result = cipher.decryptValue(encryptedValue);
                    FunctionUtils.doIf(result != null,
                            r -> LOGGER.info("Encrypted Value: [{}] Decryption succeeded", encryptedValue),
                            t -> LOGGER.warn("Encrypted Value: [{}] Decryption Failed", encryptedValue))
                        .accept(result);

                } catch (final Exception e) {
                    if (e.getCause() instanceof NoSuchAlgorithmException) {
                        LOGGER.warn("Provider: [{}] does not support Algorithm: [{}]", provider, algorithmStr);
                    } else {
                        LOGGER.warn("Error encrypting using provider: [{}] and algorithm: [{}], Message: [{}]", provider, algorithmStr, e.getMessage());
                    }
                }
            }
        }
    }
}

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