beemdevelopment/Aegis · error

Unsupported number of digits

Error message

Unsupported number of digits: %s

What it means

When encoding to a migration payload, getUri maps the OtpInfo's digit count to the protobuf DigitCount enum, which only defines 6 and 8 (with 7 commonly accepted as unspecified). Digit counts outside {6, 8} cannot be represented and throw a GoogleAuthInfoException.

Solutions

1. Change the token's digit count to 6 or 8 before exporting
2. Skip entries with unsupported digit counts during export
3. Extend the switch to map other digit counts if acceptable for the payload

Example fix

// before
TotpInfo info = new TotpInfo(secret, "SHA1", 7, 30); // then export
// after
TotpInfo info = new TotpInfo(secret, "SHA1", 6, 30); // then export

int d = entry.getInfo().getDigits();
if (d != 6 && d != 8) { /* skip or warn */ }

try {
    uri = GoogleAuthInfo.getUri(entry);
} catch (GoogleAuthInfoException e) {
    skipped.add(entry); // unsupported digit count for Google export
}

When it happens

Trigger: Calling GoogleAuthInfo.getUri (via export/exportGoogleUris) on an entry whose getOtpInfo().getDigits() is not 6 or 8 (e.g. 5, 7, 9, 10-digit tokens).

Common situations: Custom tokens configured with unusual digit counts in Aegis, or fork-defined token types with non-standard code lengths.

Understand the failure class

Background: "value must be between 0 and 1" / "out of range" / "must not be negative" errors: fixing range-validation failures across open-source libraries — this error's family across 42 libraries.

Related errors

• Bad URI format
• Unsupported protocol
• Export list contains entries from different batches
• Unsupported Algorithm
• Type unsupported by GoogleAuthProtos

AI-assisted analysis of beemdevelopment/Aegis@d6f4e5925a (2026-09-08). Data as JSON: /api/errors/4e8c7a5cdc5d5be5. Report an issue: GitHub.

Appendix: source

Thrown at app/src/main/java/com/beemdevelopment/aegis/otp/GoogleAuthInfo.java:437

                    case "SHA512":
                        parameters.setAlgorithm(GoogleAuthProtos.MigrationPayload.Algorithm.ALGORITHM_SHA512);
                        break;
                    case "MD5":
                        parameters.setAlgorithm(GoogleAuthProtos.MigrationPayload.Algorithm.ALGORITHM_MD5);
                        break;
                    default:
                        throw new GoogleAuthInfoException(info.getUri(), String.format("Unsupported Algorithm: %s", info.getOtpInfo().getAlgorithm(false)));
                }

                switch (info.getOtpInfo().getDigits()) {
                    case 6:
                        parameters.setDigits(GoogleAuthProtos.MigrationPayload.DigitCount.DIGIT_COUNT_SIX);
                        break;
                    case 8:
                        parameters.setDigits(GoogleAuthProtos.MigrationPayload.DigitCount.DIGIT_COUNT_EIGHT);
                        break;
                    default:
                        throw new GoogleAuthInfoException(info.getUri(), String.format("Unsupported number of digits: %s", info.getOtpInfo().getDigits()));
                }

                switch (info.getOtpInfo().getType().toLowerCase()) {
                    case HotpInfo.ID:
                        parameters.setType(GoogleAuthProtos.MigrationPayload.OtpType.OTP_TYPE_HOTP);
                        parameters.setCounter(((HotpInfo) info.getOtpInfo()).getCounter());
                        break;
                    case TotpInfo.ID:
                        parameters.setType(GoogleAuthProtos.MigrationPayload.OtpType.OTP_TYPE_TOTP);
                        break;
                    default:
                        throw new GoogleAuthInfoException(info.getUri(), String.format("Type unsupported by GoogleAuthProtos: %s", info.getOtpInfo().getType()));
                }

                builder.addOtpParameters(parameters.build());
            }

            Uri.Builder exportUriBuilder = new Uri.Builder()

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