1 files changed, 73 insertions, 0 deletions
diff --git a/lib/psa/delegated_attestation.c b/lib/psa/delegated_attestation.c
new file mode 100644
index 0000000..81e2621
--- /dev/null
+++ b/lib/psa/delegated_attestation.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2022-2023, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <delegated_attestation.h>
+#include <psa/client.h>
+#include <psa_manifest/sid.h>
+
+psa_status_t
+rss_delegated_attest_get_delegated_key(uint8_t   ecc_curve,
+				       uint32_t  key_bits,
+				       uint8_t  *key_buf,
+				       size_t    key_buf_size,
+				       size_t   *key_size,
+				       uint32_t  hash_algo)
+{
+	psa_status_t status;
+	psa_invec in_vec[] = {
+		{&ecc_curve, sizeof(ecc_curve)},
+		{&key_bits,  sizeof(key_bits)},
+		{&hash_algo, sizeof(hash_algo)}
+	};
+	psa_outvec out_vec[] = {
+		{key_buf, key_buf_size}
+	};
+
+	if (key_size == NULL) {
+		return PSA_ERROR_INVALID_ARGUMENT;
+	}
+
+	status = psa_call(RSS_DELEGATED_SERVICE_HANDLE,
+			  RSS_DELEGATED_ATTEST_GET_DELEGATED_KEY,
+			  in_vec,  IOVEC_LEN(in_vec),
+			  out_vec, IOVEC_LEN(out_vec));
+	if (status == PSA_SUCCESS) {
+		*key_size = out_vec[0].len;
+	}
+
+	return status;
+}
+
+psa_status_t
+rss_delegated_attest_get_token(const uint8_t *dak_pub_hash,
+			       size_t         dak_pub_hash_size,
+			       uint8_t       *token_buf,
+			       size_t         token_buf_size,
+			       size_t        *token_size)
+{
+	psa_status_t status;
+	psa_invec in_vec[] = {
+		{dak_pub_hash, dak_pub_hash_size}
+	};
+	psa_outvec out_vec[] = {
+		{token_buf, token_buf_size}
+	};
+
+	if (token_size == NULL) {
+		return PSA_ERROR_INVALID_ARGUMENT;
+	}
+
+	status = psa_call(RSS_DELEGATED_SERVICE_HANDLE,
+			  RSS_DELEGATED_ATTEST_GET_PLATFORM_TOKEN,
+			  in_vec, IOVEC_LEN(in_vec),
+			  out_vec, IOVEC_LEN(out_vec));
+	if (status == PSA_SUCCESS) {
+		*token_size = out_vec[0].len;
+	}
+
+	return status;
+}