Implement two-valued handle type
diff --git a/include/mbedtls/pk.h b/include/mbedtls/pk.h
index 476bce1..64cd7b5 100644
--- a/include/mbedtls/pk.h
+++ b/include/mbedtls/pk.h
@@ -126,9 +126,16 @@
/**
* \brief Public key information and operations
*/
+#if defined(MBEDTLS_PK_SINGLE_TYPE)
+typedef enum {
+ MBEDTLS_PK_INVALID_HANDLE,
+ MBEDTLS_PK_UNIQUE_VALID_HANDLE,
+} mbedtls_pk_handle_t;
+#else /* MBEDTLS_PK_SINGLE_TYPE */
typedef struct mbedtls_pk_info_t mbedtls_pk_info_t;
typedef const mbedtls_pk_info_t *mbedtls_pk_handle_t;
#define MBEDTLS_PK_INVALID_HANDLE ( (mbedtls_pk_handle_t) NULL )
+#endif /* MBEDTLS_PK_SINGLE_TYPE */
/**
* \brief Public key container