More precise reference for the RSA public key format
diff --git a/include/psa/crypto.h b/include/psa/crypto.h
index 69c93dd..95c8948 100644
--- a/include/psa/crypto.h
+++ b/include/psa/crypto.h
@@ -428,7 +428,7 @@
* is the non-encrypted DER representation defined by PKCS\#8 (RFC 5208)
* as PrivateKeyInfo.
* - For RSA public keys (#PSA_KEY_TYPE_RSA_PUBLIC_KEY), the format
- * is the DER representation defined by X.509.
+ * is the DER representation defined by RFC 5280 as SubjectPublicKeyInfo.
*
* \param key Slot whose content is to be exported. This must
* be an occupied key slot.
@@ -458,7 +458,8 @@
* For standard key types, the output format is as follows:
*
* - For RSA keys (#PSA_KEY_TYPE_RSA_KEYPAIR or #PSA_KEY_TYPE_RSA_PUBLIC_KEY),
- * the format is the DER representation defined by X.509.
+ * is the DER representation of the public key defined by RFC 5280
+ * as SubjectPublicKeyInfo.
*
* \param key Slot whose content is to be exported. This must
* be an occupied key slot.