web-auth/cose-lib
PHP 8.1+ COSE (CBOR Object Signing and Encryption) library implementing RFC 9052/9053. Supports COSE_Sign1/Sign, Encrypt0/Encrypt, Mac0/Mac tags plus ECDSA, EdDSA, RSA/PS, and HMAC algorithms—ideal for WebAuthn/FIDO2.
Cose Key and Algorithms support
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