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Support to open serial only sessions #109

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Support to open serial only sessions #109

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9 changes: 8 additions & 1 deletion crypto11.go
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Original file line number Diff line number Diff line change
Expand Up @@ -265,6 +265,8 @@ type Config struct {
GCMIVLength int

GCMIVFromHSMControl GCMIVFromHSMConfig

SerialSessionOnly bool
}

type GCMIVFromHSMConfig struct {
Expand Down Expand Up @@ -362,7 +364,12 @@ func Configure(config *Config) (*Context, error) {

// Create a long-term session and log it in (if supported). This session won't be used by callers, instead it is
// used to keep a connection alive to the token to ensure object handles and the log in status remain accessible.
instance.persistentSession, err = instance.ctx.OpenSession(instance.slot, pkcs11.CKF_SERIAL_SESSION|pkcs11.CKF_RW_SESSION)
flags := uint(pkcs11.CKF_SERIAL_SESSION)
if !config.SerialSessionOnly {
flags = flags | pkcs11.CKF_RW_SESSION
}

instance.persistentSession, err = instance.ctx.OpenSession(instance.slot, flags)
if err != nil {
_ = instance.ctx.Finalize()
instance.ctx.Destroy()
Expand Down
8 changes: 7 additions & 1 deletion sessions.go
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Original file line number Diff line number Diff line change
Expand Up @@ -80,7 +80,13 @@ func (c *Context) getSession() (*pkcs11Session, error) {

// resourcePoolFactoryFunc is called by the resource pool when a new session is needed.
func (c *Context) resourcePoolFactoryFunc() (pool.Resource, error) {
session, err := c.ctx.OpenSession(c.slot, pkcs11.CKF_SERIAL_SESSION|pkcs11.CKF_RW_SESSION)
flags := uint(pkcs11.CKF_SERIAL_SESSION)

if !c.cfg.SerialSessionOnly {
flags = flags | pkcs11.CKF_RW_SESSION
}

session, err := c.ctx.OpenSession(c.slot, flags)
if err != nil {
return nil, err
}
Expand Down