emissary/internal/client/register_agent.go

package client

import (
	"context"

	"forge.cadoles.com/Cadoles/emissary/internal/agent/metadata"
	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
	"forge.cadoles.com/Cadoles/emissary/internal/jwk"
	"github.com/pkg/errors"
)

func (c *Client) RegisterAgent(ctx context.Context, key jwk.Key, thumbprint string, meta []metadata.Tuple, funcs ...OptionFunc) (*datastore.Agent, error) {
	keySet, err := jwk.PublicKeySet(key)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	signature, err := jwk.Sign(key, thumbprint, meta)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	payload := struct {
		KeySet     jwk.Set          `json:"keySet"`
		Thumbprint string           `json:"thumbprint"`
		Metadata   []metadata.Tuple `json:"metadata"`
		Signature  string           `json:"signature"`
	}{
		Thumbprint: thumbprint,
		Metadata:   meta,
		Signature:  signature,
		KeySet:     keySet,
	}

	response := withResponse[struct {
		Agent *datastore.Agent `json:"agent"`
	}]()

	if err := c.apiPost(ctx, "/api/v1/register", payload, &response, funcs...); err != nil {
		return nil, errors.WithStack(err)
	}

	if response.Error != nil {
		return nil, errors.WithStack(response.Error)
	}

	return response.Data.Agent, nil
}