diff --git a/include/mbedtls/x509.h b/include/mbedtls/x509.h
index 7faf176..ba2396a 100644
--- a/include/mbedtls/x509.h
+++ b/include/mbedtls/x509.h
@@ -27,6 +27,7 @@
 
 #include "mbedtls/asn1.h"
 #include "mbedtls/pk.h"
+#include "pk_internal.h"
 
 #if defined(MBEDTLS_RSA_C)
 #include "mbedtls/rsa.h"
diff --git a/library/pk.c b/library/pk.c
index 71ab60d..d92de69 100644
--- a/library/pk.c
+++ b/library/pk.c
@@ -879,7 +879,7 @@
         psa_status_t status;
 
         /* export the private key material in the format PSA wants */
-        ec = mbedtls_pk_ec(*pk);
+        ec = mbedtls_pk_ec_rw(*pk);
         d_len = PSA_BITS_TO_BYTES(ec->grp.nbits);
         if ((ret = mbedtls_ecp_write_key(ec, d, d_len)) != 0) {
             return ret;
diff --git a/library/pkparse.c b/library/pkparse.c
index ade8a04..87b707d 100644
--- a/library/pkparse.c
+++ b/library/pkparse.c
@@ -26,6 +26,7 @@
 #include "mbedtls/oid.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
+#include "pk_internal.h"
 
 #include <string.h>
 
@@ -795,14 +796,14 @@
     if (pk_alg == MBEDTLS_PK_ECKEY_DH || pk_alg == MBEDTLS_PK_ECKEY) {
 #if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
         if (mbedtls_pk_is_rfc8410_curve(ec_grp_id)) {
-            ret = pk_use_ecparams_rfc8410(&alg_params, ec_grp_id, &mbedtls_pk_ec(*pk)->grp);
+            ret = pk_use_ecparams_rfc8410(&alg_params, ec_grp_id, &mbedtls_pk_ec_rw(*pk)->grp);
         } else
 #endif
         {
-            ret = pk_use_ecparams(&alg_params, &mbedtls_pk_ec(*pk)->grp);
+            ret = pk_use_ecparams(&alg_params, &mbedtls_pk_ec_rw(*pk)->grp);
         }
         if (ret == 0) {
-            ret = pk_get_ecpubkey(p, end, mbedtls_pk_ec(*pk));
+            ret = pk_get_ecpubkey(p, end, mbedtls_pk_ec_rw(*pk));
         }
     } else
 #endif /* MBEDTLS_ECP_LIGHT */
@@ -1231,10 +1232,10 @@
     if (pk_alg == MBEDTLS_PK_ECKEY || pk_alg == MBEDTLS_PK_ECKEY_DH) {
 #if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
         if (mbedtls_pk_is_rfc8410_curve(ec_grp_id)) {
-            if ((ret =
-                     pk_use_ecparams_rfc8410(&params, ec_grp_id, &mbedtls_pk_ec(*pk)->grp)) != 0 ||
+            if ((ret = pk_use_ecparams_rfc8410(&params, ec_grp_id,
+                                               &mbedtls_pk_ec_rw(*pk)->grp)) != 0 ||
                 (ret =
-                     pk_parse_key_rfc8410_der(mbedtls_pk_ec(*pk), p, len, end, f_rng,
+                     pk_parse_key_rfc8410_der(mbedtls_pk_ec_rw(*pk), p, len, end, f_rng,
                                               p_rng)) != 0) {
                 mbedtls_pk_free(pk);
                 return ret;
@@ -1242,8 +1243,8 @@
         } else
 #endif
         {
-            if ((ret = pk_use_ecparams(&params, &mbedtls_pk_ec(*pk)->grp)) != 0 ||
-                (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk), p, len, f_rng, p_rng)) != 0) {
+            if ((ret = pk_use_ecparams(&params, &mbedtls_pk_ec_rw(*pk)->grp)) != 0 ||
+                (ret = pk_parse_key_sec1_der(mbedtls_pk_ec_rw(*pk), p, len, f_rng, p_rng)) != 0) {
                 mbedtls_pk_free(pk);
                 return ret;
             }
@@ -1430,7 +1431,7 @@
         pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY);
 
         if ((ret = mbedtls_pk_setup(pk, pk_info)) != 0 ||
-            (ret = pk_parse_key_sec1_der(mbedtls_pk_ec(*pk),
+            (ret = pk_parse_key_sec1_der(mbedtls_pk_ec_rw(*pk),
                                          pem.buf, pem.buflen,
                                          f_rng, p_rng)) != 0) {
             mbedtls_pk_free(pk);
@@ -1554,7 +1555,7 @@
 #if defined(MBEDTLS_ECP_LIGHT)
     pk_info = mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY);
     if (mbedtls_pk_setup(pk, pk_info) == 0 &&
-        pk_parse_key_sec1_der(mbedtls_pk_ec(*pk),
+        pk_parse_key_sec1_der(mbedtls_pk_ec_rw(*pk),
                               key, keylen, f_rng, p_rng) == 0) {
         return 0;
     }
diff --git a/library/pkwrite.c b/library/pkwrite.c
index 8872953..1f606a4 100644
--- a/library/pkwrite.c
+++ b/library/pkwrite.c
@@ -26,6 +26,7 @@
 #include "mbedtls/oid.h"
 #include "mbedtls/platform_util.h"
 #include "mbedtls/error.h"
+#include "pk_internal.h"
 
 #include <string.h>
 
@@ -182,7 +183,7 @@
 #endif
 #if defined(MBEDTLS_ECP_LIGHT)
     if (mbedtls_pk_get_type(key) == MBEDTLS_PK_ECKEY) {
-        MBEDTLS_ASN1_CHK_ADD(len, pk_write_ec_pubkey(p, start, mbedtls_pk_ec(*key)));
+        MBEDTLS_ASN1_CHK_ADD(len, pk_write_ec_pubkey(p, start, mbedtls_pk_ec_rw(*key)));
     } else
 #endif
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
@@ -246,7 +247,7 @@
     pk_type = mbedtls_pk_get_type(key);
 #if defined(MBEDTLS_ECP_LIGHT)
     if (pk_type == MBEDTLS_PK_ECKEY) {
-        ec_grp_id = mbedtls_pk_ec(*key)->grp.id;
+        ec_grp_id = mbedtls_pk_ec_ro(*key)->grp.id;
     }
 #endif /* MBEDTLS_ECP_LIGHT */
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
@@ -469,7 +470,7 @@
 #endif /* MBEDTLS_RSA_C */
 #if defined(MBEDTLS_ECP_LIGHT)
     if (mbedtls_pk_get_type(key) == MBEDTLS_PK_ECKEY) {
-        mbedtls_ecp_keypair *ec = mbedtls_pk_ec(*key);
+        mbedtls_ecp_keypair *ec = mbedtls_pk_ec_rw(*key);
         size_t pub_len = 0, par_len = 0;
 
 #if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
@@ -591,7 +592,7 @@
 #if defined(MBEDTLS_ECP_LIGHT)
     if (mbedtls_pk_get_type(key) == MBEDTLS_PK_ECKEY) {
 #if defined(MBEDTLS_PK_HAVE_RFC8410_CURVES)
-        if (mbedtls_pk_is_rfc8410_curve(mbedtls_pk_ec(*key)->grp.id)) {
+        if (mbedtls_pk_is_rfc8410_curve(mbedtls_pk_ec_ro(*key)->grp.id)) {
             begin = PEM_BEGIN_PRIVATE_KEY_PKCS8;
             end = PEM_END_PRIVATE_KEY_PKCS8;
         } else
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index cd87164..fe666e8 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -7388,9 +7388,9 @@
             /* and in the unlikely case the above assumption no longer holds
              * we are making sure that pk_ec() here does not return a NULL
              */
-            const mbedtls_ecp_keypair *ec = mbedtls_pk_ec(*pk);
+            const mbedtls_ecp_keypair *ec = mbedtls_pk_ec_ro(*pk);
             if (ec == NULL) {
-                MBEDTLS_SSL_DEBUG_MSG(1, ("mbedtls_pk_ec() returned NULL"));
+                MBEDTLS_SSL_DEBUG_MSG(1, ("mbedtls_pk_ec_ro() returned NULL"));
                 return MBEDTLS_ERR_SSL_INTERNAL_ERROR;
             }
 
diff --git a/library/ssl_tls12_client.c b/library/ssl_tls12_client.c
index d94d829..0940bdb 100644
--- a/library/ssl_tls12_client.c
+++ b/library/ssl_tls12_client.c
@@ -2007,7 +2007,7 @@
         return MBEDTLS_ERR_SSL_PK_TYPE_MISMATCH;
     }
 
-    peer_key = mbedtls_pk_ec(*peer_pk);
+    peer_key = mbedtls_pk_ec_ro(*peer_pk);
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
     size_t olen = 0;
diff --git a/library/ssl_tls12_server.c b/library/ssl_tls12_server.c
index ac6c10d..38a3fc4 100644
--- a/library/ssl_tls12_server.c
+++ b/library/ssl_tls12_server.c
@@ -666,7 +666,7 @@
                                uint16_t *curves_tls_id)
 {
     uint16_t *curr_tls_id = curves_tls_id;
-    mbedtls_ecp_group_id grp_id = mbedtls_pk_ec(*pk)->grp.id;
+    mbedtls_ecp_group_id grp_id = mbedtls_pk_ec_ro(*pk)->grp.id;
     mbedtls_ecp_group_id curr_grp_id;
 
     while (*curr_tls_id != 0) {
@@ -2636,7 +2636,7 @@
         case MBEDTLS_PK_ECKEY:
         case MBEDTLS_PK_ECKEY_DH:
         case MBEDTLS_PK_ECDSA:
-            key = mbedtls_pk_ec(*pk);
+            key = mbedtls_pk_ec_ro(*pk);
             if (key == NULL) {
                 return MBEDTLS_ERR_ECP_BAD_INPUT_DATA;
             }
@@ -2704,7 +2704,7 @@
     }
 
     if ((ret = mbedtls_ecdh_get_params(&ssl->handshake->ecdh_ctx,
-                                       mbedtls_pk_ec(*mbedtls_ssl_own_key(ssl)),
+                                       mbedtls_pk_ec_ro(*mbedtls_ssl_own_key(ssl)),
                                        MBEDTLS_ECDH_OURS)) != 0) {
         MBEDTLS_SSL_DEBUG_RET(1, ("mbedtls_ecdh_get_params"), ret);
         return ret;
diff --git a/library/x509_crt.c b/library/x509_crt.c
index 6d62e44..2f6d924 100644
--- a/library/x509_crt.c
+++ b/library/x509_crt.c
@@ -237,7 +237,7 @@
     if (pk_alg == MBEDTLS_PK_ECDSA ||
         pk_alg == MBEDTLS_PK_ECKEY ||
         pk_alg == MBEDTLS_PK_ECKEY_DH) {
-        const mbedtls_ecp_group_id gid = mbedtls_pk_ec(*pk)->grp.id;
+        const mbedtls_ecp_group_id gid = mbedtls_pk_ec_ro(*pk)->grp.id;
 
         if (gid == MBEDTLS_ECP_DP_NONE) {
             return -1;
diff --git a/tests/suites/test_suite_pk.function b/tests/suites/test_suite_pk.function
index 0591029..f36c6be 100644
--- a/tests/suites/test_suite_pk.function
+++ b/tests/suites/test_suite_pk.function
@@ -6,6 +6,7 @@
 #include "mbedtls/base64.h"
 #include "mbedtls/ecp.h"
 #include "mbedtls/rsa.h"
+#include "pk_internal.h"
 
 #include "hash_info.h"
 
@@ -101,20 +102,20 @@
         mbedtls_pk_get_type(pk) == MBEDTLS_PK_ECKEY_DH ||
         mbedtls_pk_get_type(pk) == MBEDTLS_PK_ECDSA) {
         int ret;
-        if ((ret = mbedtls_ecp_group_load(&mbedtls_pk_ec(*pk)->grp,
+        if ((ret = mbedtls_ecp_group_load(&mbedtls_pk_ec_rw(*pk)->grp,
                                           parameter)) != 0) {
             return ret;
         }
 
 #if defined(MBEDTLS_USE_PSA_CRYPTO)
-        return pk_genkey_ec(&mbedtls_pk_ec(*pk)->grp,
-                            &mbedtls_pk_ec(*pk)->d,
-                            &mbedtls_pk_ec(*pk)->Q);
+        return pk_genkey_ec(&mbedtls_pk_ec_rw(*pk)->grp,
+                            &mbedtls_pk_ec_rw(*pk)->d,
+                            &mbedtls_pk_ec_rw(*pk)->Q);
 #endif /* MBEDTLS_USE_PSA_CRYPTO */
 #if defined(MBEDTLS_ECP_C)
-        return mbedtls_ecp_gen_keypair(&mbedtls_pk_ec(*pk)->grp,
-                                       &mbedtls_pk_ec(*pk)->d,
-                                       &mbedtls_pk_ec(*pk)->Q,
+        return mbedtls_ecp_gen_keypair(&mbedtls_pk_ec_rw(*pk)->grp,
+                                       &mbedtls_pk_ec_rw(*pk)->d,
+                                       &mbedtls_pk_ec_rw(*pk)->Q,
                                        mbedtls_test_rnd_std_rand, NULL);
 #endif /* MBEDTLS_ECP_C */
     }
@@ -709,7 +710,7 @@
     TEST_ASSERT(mbedtls_pk_setup(&pk, mbedtls_pk_info_from_type(type)) == 0);
 
     TEST_ASSERT(mbedtls_pk_can_do(&pk, MBEDTLS_PK_ECDSA));
-    eckey = mbedtls_pk_ec(pk);
+    eckey = mbedtls_pk_ec_rw(pk);
 
     TEST_ASSERT(mbedtls_ecp_group_load(&eckey->grp, id) == 0);
     TEST_ASSERT(mbedtls_ecp_point_read_binary(&eckey->grp, &eckey->Q,
@@ -745,12 +746,12 @@
     memset(sig, 0, sizeof(sig));
 
     TEST_ASSERT(mbedtls_pk_setup(&prv, mbedtls_pk_info_from_type(pk_type)) == 0);
-    TEST_ASSERT(mbedtls_ecp_group_load(&mbedtls_pk_ec(prv)->grp, grp_id) == 0);
-    TEST_ASSERT(mbedtls_test_read_mpi(&mbedtls_pk_ec(prv)->d, d_str) == 0);
+    TEST_ASSERT(mbedtls_ecp_group_load(&mbedtls_pk_ec_rw(prv)->grp, grp_id) == 0);
+    TEST_ASSERT(mbedtls_test_read_mpi(&mbedtls_pk_ec_rw(prv)->d, d_str) == 0);
 
     TEST_ASSERT(mbedtls_pk_setup(&pub, mbedtls_pk_info_from_type(pk_type)) == 0);
-    TEST_ASSERT(mbedtls_ecp_group_load(&mbedtls_pk_ec(pub)->grp, grp_id) == 0);
-    TEST_ASSERT(mbedtls_ecp_point_read_string(&mbedtls_pk_ec(pub)->Q, 16, QX_str, QY_str) == 0);
+    TEST_ASSERT(mbedtls_ecp_group_load(&mbedtls_pk_ec_rw(pub)->grp, grp_id) == 0);
+    TEST_ASSERT(mbedtls_ecp_point_read_string(&mbedtls_pk_ec_rw(pub)->Q, 16, QX_str, QY_str) == 0);
 
     mbedtls_ecp_set_max_ops(max_ops);
 
@@ -1316,8 +1317,8 @@
     /* mbedtls_pk_write_pubkey_der() writes backwards in the data buffer. */
     pkey_legacy_start = pkey_legacy + sizeof(pkey_legacy) - klen_legacy;
 #else
-    ret = mbedtls_ecp_point_write_binary(&(mbedtls_pk_ec(pk)->grp),
-                                         &(mbedtls_pk_ec(pk)->Q),
+    ret = mbedtls_ecp_point_write_binary(&(mbedtls_pk_ec_ro(pk)->grp),
+                                         &(mbedtls_pk_ec_ro(pk)->Q),
                                          MBEDTLS_ECP_PF_UNCOMPRESSED,
                                          &klen_legacy, pkey_legacy,
                                          sizeof(pkey_legacy));
@@ -1379,10 +1380,10 @@
     TEST_EQUAL(mbedtls_pk_setup(&pk,
                                 mbedtls_pk_info_from_type(MBEDTLS_PK_ECKEY)), 0);
     TEST_EQUAL(mbedtls_ecp_group_load(
-                   &(mbedtls_pk_ec(pk)->grp),
+                   &(mbedtls_pk_ec_rw(pk)->grp),
                    (mbedtls_ecp_group_id) parameter_arg), 0);
-    TEST_EQUAL(mbedtls_ecp_point_read_binary(&(mbedtls_pk_ec(pk)->grp),
-                                             &(mbedtls_pk_ec(pk)->Q),
+    TEST_EQUAL(mbedtls_ecp_point_read_binary(&(mbedtls_pk_ec_ro(pk)->grp),
+                                             &(mbedtls_pk_ec_rw(pk)->Q),
                                              pkey_legacy_start, klen_legacy), 0);
 #endif
     TEST_ASSERT(mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA256,
diff --git a/tests/suites/test_suite_pkparse.function b/tests/suites/test_suite_pkparse.function
index 838a7db..e0e3300 100644
--- a/tests/suites/test_suite_pkparse.function
+++ b/tests/suites/test_suite_pkparse.function
@@ -3,6 +3,7 @@
 #include "mbedtls/pem.h"
 #include "mbedtls/oid.h"
 #include "mbedtls/ecp.h"
+#include "pk_internal.h"
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES
@@ -83,9 +84,9 @@
     TEST_ASSERT(res == result);
 
     if (res == 0) {
-        mbedtls_ecp_keypair *eckey;
+        const mbedtls_ecp_keypair *eckey;
         TEST_ASSERT(mbedtls_pk_can_do(&ctx, MBEDTLS_PK_ECKEY));
-        eckey = mbedtls_pk_ec(ctx);
+        eckey = mbedtls_pk_ec_ro(ctx);
         TEST_ASSERT(mbedtls_ecp_check_pubkey(&eckey->grp, &eckey->Q) == 0);
     }
 
@@ -110,9 +111,9 @@
     TEST_ASSERT(res == result);
 
     if (res == 0) {
-        mbedtls_ecp_keypair *eckey;
+        const mbedtls_ecp_keypair *eckey;
         TEST_ASSERT(mbedtls_pk_can_do(&ctx, MBEDTLS_PK_ECKEY));
-        eckey = mbedtls_pk_ec(ctx);
+        eckey = mbedtls_pk_ec_ro(ctx);
         TEST_ASSERT(mbedtls_ecp_check_privkey(&eckey->grp, &eckey->d) == 0);
     }