Quick Start

This walkthrough takes you from an empty directory to a signed, verified Open Badge in both OB2 (JWS) and OB3 (JWT-VC) formats. For the full flag list see CLI Reference, and for the config keys referenced here see Configuration.

1. Scaffold the configuration

Create the config directory and a starter config.ini:

openbadges-init ./config

The example config ships with two badge sections ([badge_1], [badge_2]), an [issuer] section, and [paths] pointing keys at ${base}/keys. Edit the issuer details and at least one [badge_*] section before continuing. The default key type is RSA (key_type = RSA; ECC is the alternative).

2. Generate a key pair

Keys are generated per badge section. Pass the config file and the section suffix — the part after badge_ — to -g. The algorithm comes from that section's key_type:

openbadges-keygenerator -c ./config/config.ini -g 1

INFO - Generating OpenBadges 2 RSA key pair for issuer 'OpenBadge issuer'
INFO - Private key saved at: ./config/keys/sign_rsa_key_1.pem
INFO - Public key saved at:  ./config/keys/verify_rsa_key_1.pem

The same key material works for both OB2 and OB3, so you only generate once. Back up sign_rsa_key_1.pem: if the private key is lost you cannot sign new badges, and if the public key is lost existing badges can no longer be verified.

3. OB2 flow (JWS, the default)

Sign

openbadges-signer bakes a JWS assertion into the badge image. You must choose explicitly whether the badge carries evidence: pass either -e / --evidence URL or -E / --no-evidence. Supplying neither (or both) exits with Please, choose '-e' OR '-E'. OB2 is the default, so -V 2 is optional.

openbadges-signer -c ./config/config.ini -b 1 \
    -r recipient@example.com \
    -e https://example.com/proof \
    -o /tmp/

2026-04-22T10:00:00 badge_1 SIGNED for recipient@example.com UID 73f8981f...4f4 at: /tmp/badge_1_recipient@example.com.svg

The output filename is <badge>_<recipient>.svg (or .png, depending on the badge image type) inside -o. Signing a second time over an existing file is refused. To sign with no evidence, swap -e URL for -E. Add -x DAYS for an expiration, or -M to email the badge (requires the [smtp] section and a mail entry in the badge section).

Verify

openbadges-verifier -c ./config/config.ini \
    -i /tmp/badge_1_recipient@example.com.svg \
    -r recipient@example.com -l 1

[+] Signature is correct for the identity recipient@example.com

The -l BADGE flag pins the trusted public key from config.ini; -k / --pubkey FILE does the same from an explicit PEM path. If you supply neither, the verifier falls back to the key the badge points to and prints a [~] warning instead of [+] — the signature is only internally consistent, not anchored to a trusted issuer. Add -s / --show to print the decoded assertion first.

4. OB3 flow (JWT-VC)

Sign

Pass -V 3. The signer reuses the same badge section and auto-detects the algorithm from the private key (RS256 for RSA, ES256 for ECC). The -e / -E evidence choice still applies:

openbadges-signer -c ./config/config.ini -b 1 \
    -r recipient@example.com \
    -e https://example.com/proof \
    -o /tmp/ -V 3

2026-04-22T10:00:00 badge_1 OB3 SIGNED for recipient@example.com at: /tmp/badge_1_recipient@example.com.svg

Verify

OB3 verification requires a trusted key — there is no fallback. Supply it with -k / --pubkey FILE or -l BADGE:

# Using a PEM file directly
openbadges-verifier \
    -i /tmp/badge_1_recipient@example.com.svg \
    -r recipient@example.com -V 3 \
    -k ./config/keys/verify_rsa_key_1.pem

[+] OB3 signature is valid for the identity recipient@example.com

# Using the local config
openbadges-verifier -c ./config/config.ini \
    -i /tmp/badge_1_recipient@example.com.svg \
    -r recipient@example.com -V 3 -l 1

Omitting both -k and -l prints [!] OB3 verification requires --local BADGE or --pubkey FILE and exits. With -s / --show, the verifier also prints the issuer name, achievement name, issuance date, expiration (if set), and evidence URL.

Next steps

• Task-oriented recipes (batch signing, emailing, publishing) live in Guides.
• Every flag for all five console scripts is documented in CLI Reference.
• All config.ini keys are explained in Configuration.