diff --git a/include/lib/psa/rss_platform_api.h b/include/lib/psa/rss_platform_api.h
index 1dd7d05..8f74a51 100644
--- a/include/lib/psa/rss_platform_api.h
+++ b/include/lib/psa/rss_platform_api.h
@@ -11,6 +11,7 @@
 #include <stdint.h>
 
 #include "psa/error.h"
+#include <rss_crypto_defs.h>
 
 #define RSS_PLATFORM_API_ID_NV_READ       (1010)
 #define RSS_PLATFORM_API_ID_NV_INCREMENT  (1011)
@@ -41,4 +42,19 @@
 rss_platform_nv_counter_read(uint32_t counter_id,
 		uint32_t size, uint8_t *val);
 
+/*
+ * Reads the public key or the public part of a key pair in binary format.
+ *
+ * key		Identifier of the key to export.
+ * data		Buffer where the key data is to be written.
+ * data_size	Size of the data buffer in bytes.
+ * data_length	On success, the number of bytes that make up the key data.
+ *
+ * PSA_SUCCESS if the value is read correctly. Otherwise,
+ *	it returns a PSA_ERROR.
+ */
+psa_status_t
+rss_platform_key_read(enum rss_key_id_builtin_t key, uint8_t *data,
+		size_t data_size, size_t *data_length);
+
 #endif /* RSS_PLATFORM_API_H */