2 files changed, 33 insertions, 0 deletions
diff --git a/providers/implementations/include/prov/ecx.h b/providers/implementations/include/prov/ecx.h
new file mode 100644
index 0000000000..3427d154aa
--- /dev/null
+++ b/providers/implementations/include/prov/ecx.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include "crypto/types.h"
+
+#ifndef OPENSSL_NO_EC
+
+/* RFC 9180 Labels used for Extract and Expand operations */
+
+/* ASCII: "eae_prk", in hex for EBCDIC compatibility */
+#define OSSL_DHKEM_LABEL_EAE_PRK "\x65\x61\x65\x5F\x70\x72\x6B"
+/* ASCII: "shared_secret", in hex for EBCDIC compatibility */
+#define OSSL_DHKEM_LABEL_SHARED_SECRET "\x73\x68\x61\x72\x65\x64\x5F\x73\x65\x63\x72\x65\x74"
+/* ASCII: "dkp_prk", in hex for EBCDIC compatibility */
+#define OSSL_DHKEM_LABEL_DKP_PRK "\x64\x6B\x70\x5F\x70\x72\x6B"
+/* ASCII: "candidate", in hex for EBCDIC compatibility */
+#define OSSL_DHKEM_LABEL_CANDIDATE "\x63\x61\x6E\x64\x69\x64\x61\x74\x65"
+/* ASCII: "sk", in hex for EBCDIC compatibility */
+#define OSSL_DHKEM_LABEL_SK "\x73\x6B"
+
+int ossl_ecx_dhkem_derive_private(ECX_KEY *ecx, unsigned char *privout,
+                                  const unsigned char *ikm, size_t ikmlen);
+int ossl_ec_dhkem_derive_private(EC_KEY *ec, BIGNUM *privout,
+                                 const unsigned char *ikm, size_t ikmlen);
+#endif
diff --git a/providers/implementations/include/prov/implementations.h b/providers/implementations/include/prov/implementations.h
index a6ac602d41..9ea14162c7 100644
--- a/providers/implementations/include/prov/implementations.h
+++ b/providers/implementations/include/prov/implementations.h
@@ -334,6 +334,8 @@ extern const OSSL_DISPATCH ossl_sm2_asym_cipher_functions[];
 
 /* Asym Key encapsulation  */
 extern const OSSL_DISPATCH ossl_rsa_asym_kem_functions[];
+extern const OSSL_DISPATCH ossl_ecx_asym_kem_functions[];
+extern const OSSL_DISPATCH ossl_ec_asym_kem_functions[];
 
 /* Encoders */
 extern const OSSL_DISPATCH ossl_rsa_to_PKCS1_der_encoder_functions[];