certificates/scep/common.go

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package scep
import (
"context"
"errors"
)
// ContextKey is the key type for storing and searching for SCEP request
// essentials in the context of a request.
type ContextKey string
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const (
// ProvisionerContextKey provisioner key
ProvisionerContextKey = ContextKey("provisioner")
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)
// ProvisionerFromContext searches the context for a SCEP provisioner.
// Returns the provisioner or an error.
func ProvisionerFromContext(ctx context.Context) (Provisioner, error) {
val := ctx.Value(ProvisionerContextKey)
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if val == nil {
return nil, errors.New("provisioner expected in request context")
}
p, ok := val.(Provisioner)
if !ok || p == nil {
return nil, errors.New("provisioner in context is not a SCEP provisioner")
}
return p, nil
}