beemdevelopment/Aegis · error · DatabaseImporterException

unsupported otp type:

Error message

unsupported otp type: 

What it means

FreeOTP stores each token's type ("tokentype"). The importer maps totp/hotp to TotpInfo/HotpInfo; any other type string is rejected with DatabaseImporterException because Aegis has no corresponding OTP scheme. The exception is wrapped in a DatabaseImporterEntryException naming the offending entry.

Solutions

1. Update Aegis to the latest version for newer FreeOTP type support
2. Check the entry's type value in the JSON; fix typos/casing to "totp" or "hotp"
3. Re-add unsupported tokens manually in Aegis (they can't be converted automatically)
4. File an issue/PR with Aegis to add the missing token type

Example fix

// before
default:
    throw new DatabaseImporterException("unsupported otp type: " + type);
// after
default:
    if (type.equalsIgnoreCase("totp")) { type = "totp"; /* re-dispatch */ }
    else throw new DatabaseImporterException("unsupported otp type: " + type);

String type = tokenObj.optString("tokentype", "").toLowerCase();
if (!type.equals("totp") && !type.equals("hotp")) {
    // unsupported — skip or warn before import
}

try {
    entry = importer.convertEntry(encObj, tokenObj);
} catch (DatabaseImporterEntryException e) {
    log.warn("Unsupported token type, entry skipped: " + e.getMessage());
}

When it happens

Trigger: A FreeOTP backup contains a token whose type is not "totp" or "hotp" — e.g. an internal/unrecognized type from a FreeOTP fork or a manually edited JSON.

Common situations: Version drift between FreeOTP export schema and Aegis importer; custom token types added by forks; hand-edited backups with typos (e.g. "TOTP" uppercase).

Related errors

• unsupported otp type:
• Unexpected master key KDF
• Unexpected master key cipher
• Unexpected cipher
• unsupported otp type:

AI-assisted analysis of beemdevelopment/Aegis@d6f4e5925a (2026-09-08). Data as JSON: /api/errors/2cc9b82a3812194d. Report an issue: GitHub.

Appendix: source

Thrown at app/src/main/java/com/beemdevelopment/aegis/importers/FreeOtpImporter.java:322

                String issuer = obj.getString("issuerExt");
                String name = obj.optString("label");

                OtpInfo info;
                switch (type) {
                    case "totp":
                        int period = obj.optInt("period", TotpInfo.DEFAULT_PERIOD);
                        if (issuer.equals("Steam")) {
                            info = new SteamInfo(secret, algo, digits, period);
                        } else {
                            info = new TotpInfo(secret, algo, digits, period);
                        }
                        break;
                    case "hotp":
                        info = new HotpInfo(secret, algo, digits, obj.getLong("counter"));
                        break;
                    default:
                        throw new DatabaseImporterException("unsupported otp type: " + type);
                }

                return new VaultEntry(info, name, issuer);
            } catch (DatabaseImporterException | OtpInfoException | JSONException e) {
                throw new DatabaseImporterEntryException(e, obj.toString());
            }
        }
    }

    private static byte[] parseNonce(byte[] parameters) throws IOException {
        ASN1Primitive prim = ASN1Sequence.fromByteArray(parameters);
        if (prim instanceof ASN1OctetString) {
            return ((ASN1OctetString) prim).getOctets();
        }

        if (prim instanceof ASN1Sequence) {
            for (ASN1Encodable enc : (ASN1Sequence) prim) {
                if (enc instanceof ASN1OctetString) {

View on GitHub (pinned to d6f4e5925a)