diff --git a/lib/psa/rss_platform.c b/lib/psa/rss_platform.c
index 359f894..7d90bfc 100644
--- a/lib/psa/rss_platform.c
+++ b/lib/psa/rss_platform.c
@@ -5,10 +5,9 @@
  *
  */
 
-#include <stdint.h>
-
 #include <psa/client.h>
 #include <psa_manifest/sid.h>
+#include <rss_crypto_defs.h>
 #include <rss_platform_api.h>
 
 psa_status_t
@@ -41,3 +40,30 @@
 			RSS_PLATFORM_API_ID_NV_READ,
 			in_vec, 1, out_vec, 1);
 }
+
+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)
+{
+	psa_status_t status;
+
+	struct rss_crypto_pack_iovec iov = {
+		.function_id = RSS_CRYPTO_EXPORT_PUBLIC_KEY_SID,
+		.key_id = key,
+	};
+
+	psa_invec in_vec[] = {
+		{.base = &iov, .len = sizeof(struct rss_crypto_pack_iovec)},
+	};
+	psa_outvec out_vec[] = {
+		{.base = data, .len = data_size}
+	};
+
+	status = psa_call(RSS_CRYPTO_HANDLE, PSA_IPC_CALL,
+			in_vec, IOVEC_LEN(in_vec),
+			out_vec, IOVEC_LEN(out_vec));
+
+	*data_length = out_vec[0].len;
+
+	return status;
+}