Callback type for sending a CMP request and returning the response message.
Declared in <openssl/cmp.h>
typedef OSSL_CMP_MSG*(* OSSL_CMP_transfer_cb_t)(OSSL_CMP_CTX*, OSSL_CMP_MSG const*);Server response message on success, or NULL on error.
| Name | Description |
|---|---|
| ctx | CMP context with transfer settings. |
| req | Outgoing CMP request message. |