Add function prototypes for psa_crypto_output fns
Signed-off-by: David Horstmann <david.horstmann@arm.com>
diff --git a/library/psa_crypto_core.h b/library/psa_crypto_core.h
index a53824e..f3f7dfb 100644
--- a/library/psa_crypto_core.h
+++ b/library/psa_crypto_core.h
@@ -911,4 +911,43 @@
*/
void psa_crypto_input_copy_free(psa_crypto_input_copy_t *input_copy);
+typedef struct psa_crypto_output_copy_s {
+ uint8_t *original;
+ uint8_t *buffer;
+ size_t len;
+} psa_crypto_output_copy_t;
+
+/** Allocate a local copy of an output buffer.
+ *
+ * \note This does not copy any data from the original
+ * output buffer but only allocates a buffer
+ * whose contents will be copied back to the
+ * original in a future call to
+ * psa_crypto_output_copy_free().
+ *
+ * \param[in] output Pointer to output buffer.
+ * \param[in] output_len Length of the output buffer.
+ * \param[out] output_copy Pointer to a psa_crypto_output_copy_t struct to
+ * populate with the output copy.
+ * \return #PSA_SUCCESS, if the buffer was successfully
+ * copied.
+ * \return #PSA_ERROR_INSUFFICIENT_MEMORY, if a copy of
+ * the buffer cannot be allocated.
+ */
+psa_status_t psa_crypto_output_copy_alloc(uint8_t *output, size_t output_len,
+ psa_crypto_output_copy_t *output_copy);
+
+/** Copy from a local copy of an output buffer back to the original, then
+ * free the local copy.
+ *
+ * \param[in] output_copy Pointer to a psa_crypto_output_copy_t struct
+ * populated by a previous call to
+ * psa_crypto_output_copy_alloc().
+ * \return #PSA_SUCCESS, if the output copy was
+ * successfully copied back to the original.
+ * \return #PSA_ERROR_CORRUPTION_DETECTED, if the output
+ * could not be copied back to the original.
+ */
+psa_status_t psa_crypto_output_copy_free(psa_crypto_output_copy_t *output_copy);
+
#endif /* PSA_CRYPTO_CORE_H */