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raw_public_key.md

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Raw Public Key

Specification

A libspdm raw public key follows the format as defined by RFC 7250.

Cryptography Library

libspdm calls the cryptography library directly to parse the raw public key.

  • For OpenSSL, libspdm calls d2i_RSA_PUBKEY_bio for RSA, d2i_EC_PUBKEY_bio for ECDSA, and d2i_PUBKEY_bio for EdDSA and SM2DSA.
  • For MbedTLS, libspdm calls mbedtls_pk_parse_public_key for RSA and ECDSA. EdDSA and SM2DSA are not supported.

Generation

OpenSSL can be used to generate the DER-based raw public key.

openssl pkey -in end_point.key.priv.pem -inform PEM -pubout -outform DER -out end_point.key.pub.der

Registration

The Integrator can use LIBSPDM_DATA_PEER_PUBLIC_KEY and LIBSPDM_DATA_LOCAL_PUBLIC_KEY to register the raw public key.