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diff --git a/third_party/heimdal/lib/krb5/pkinit-ec.c b/third_party/heimdal/lib/krb5/pkinit-ec.c
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+/*
+ * Copyright (c) 2016 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Portions Copyright (c) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include <roken.h>
+
+#ifdef PKINIT
+
+/*
+ * As with the other *-ec.c files in Heimdal, this is a bit of a hack.
+ *
+ * The idea is to use OpenSSL for EC because hcrypto doesn't have the
+ * required functionality at this time. To do this we segregate
+ * EC-using code into separate source files and then we arrange for them
+ * to get the OpenSSL headers and not the conflicting hcrypto ones.
+ *
+ * Because of auto-generated *-private.h headers, we end up needing to
+ * make sure various types are defined before we include them, thus the
+ * strange header include order here.
+ */
+
+#ifdef HAVE_HCRYPTO_W_OPENSSL
+#include <openssl/ec.h>
+#include <openssl/ecdh.h>
+#include <openssl/evp.h>
+#include <openssl/bn.h>
+#include <openssl/dh.h>
+#define HEIM_NO_CRYPTO_HDRS
+#endif
+
+/*
+ * NO_HCRYPTO_POLLUTION -> don't refer to hcrypto type/function names
+ * that we don't need in this file and which would clash with OpenSSL's
+ * in ways that are difficult to address in cleaner ways.
+ *
+ * In the medium- to long-term what we should do is move all PK in
+ * Heimdal to the newer EVP interfaces for PK and then nothing outside
+ * lib/hcrypto should ever have to include OpenSSL headers, and -more
+ * specifically- the only thing that should ever have to include OpenSSL
+ * headers is the OpenSSL backend to hcrypto.
+ */
+#define NO_HCRYPTO_POLLUTION
+
+#include "krb5_locl.h"
+#include <hcrypto/des.h>
+#include <cms_asn1.h>
+#include <pkcs8_asn1.h>
+#include <pkcs9_asn1.h>
+#include <pkcs12_asn1.h>
+#include <pkinit_asn1.h>
+#include <asn1_err.h>
+
+#include <der.h>
+
+krb5_error_code
+_krb5_build_authpack_subjectPK_EC(krb5_context context,
+ krb5_pk_init_ctx ctx,
+ AuthPack *a)
+{
+#ifdef HAVE_HCRYPTO_W_OPENSSL
+ krb5_error_code ret;
+ ECParameters ecp;
+ unsigned char *p;
+ size_t size;
+ int xlen;
+
+ /* copy in public key, XXX find the best curve that the server support or use the clients curve if possible */
+
+ ecp.element = choice_ECParameters_namedCurve;
+ ret = der_copy_oid(&asn1_oid_id_ec_group_secp256r1,
+ &ecp.u.namedCurve);
+ if (ret)
+ return ret;
+
+ ALLOC(a->clientPublicValue->algorithm.parameters, 1);
+ if (a->clientPublicValue->algorithm.parameters == NULL) {
+ free_ECParameters(&ecp);
+ return krb5_enomem(context);
+ }
+ ASN1_MALLOC_ENCODE(ECParameters, p, xlen, &ecp, &size, ret);
+ free_ECParameters(&ecp);
+ if (ret)
+ return ret;
+ if ((int)size != xlen)
+ krb5_abortx(context, "asn1 internal error");
+
+ a->clientPublicValue->algorithm.parameters->data = p;
+ a->clientPublicValue->algorithm.parameters->length = size;
+
+ /* copy in public key */
+
+ ret = der_copy_oid(&asn1_oid_id_ecPublicKey,
+ &a->clientPublicValue->algorithm.algorithm);
+ if (ret)
+ return ret;
+
+#ifdef HAVE_OPENSSL_30
+ ctx->u.eckey = EVP_EC_gen(OSSL_EC_curve_nid2name(NID_X9_62_prime256v1));
+#else
+ ctx->u.eckey = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
+ if (ctx->u.eckey == NULL)
+ return krb5_enomem(context);
+
+ ret = EC_KEY_generate_key(ctx->u.eckey);
+ if (ret != 1)
+ return EINVAL;
+#endif
+
+#ifdef HAVE_OPENSSL_30
+ xlen = i2d_PublicKey(ctx->u.eckey, NULL);
+#else
+ xlen = i2o_ECPublicKey(ctx->u.eckey, NULL);
+#endif
+ if (xlen <= 0)
+ return EINVAL;
+
+ p = malloc(xlen);
+ if (p == NULL)
+ return krb5_enomem(context);
+
+ a->clientPublicValue->subjectPublicKey.data = p;
+
+#ifdef HAVE_OPENSSL_30
+ xlen = i2d_PublicKey(ctx->u.eckey, &p);
+#else
+ xlen = i2o_ECPublicKey(ctx->u.eckey, &p);
+#endif
+ if (xlen <= 0) {
+ a->clientPublicValue->subjectPublicKey.data = NULL;
+ free(p);
+ return EINVAL;
+ }
+
+ a->clientPublicValue->subjectPublicKey.length = xlen * 8;
+
+ return 0;
+
+ /* XXX verify that this is right with RFC3279 */
+#else
+ krb5_set_error_message(context, ENOTSUP,
+ N_("PKINIT: ECDH not supported", ""));
+ return ENOTSUP;
+#endif
+}
+
+krb5_error_code
+_krb5_pk_rd_pa_reply_ecdh_compute_key(krb5_context context,
+ krb5_pk_init_ctx ctx,
+ const unsigned char *in,
+ size_t in_sz,
+ unsigned char **out,
+ int *out_sz)
+{
+#ifdef HAVE_HCRYPTO_W_OPENSSL
+#ifdef HAVE_OPENSSL_30
+ krb5_error_code ret = 0;
+ EVP_PKEY_CTX *pctx = NULL;
+ EVP_PKEY *template = NULL;
+ EVP_PKEY *public = NULL;
+ size_t shared_len = 0;
+
+ if ((template = EVP_PKEY_new()) == NULL)
+ ret = krb5_enomem(context);
+ if (ret == 0 &&
+ EVP_PKEY_copy_parameters(template, ctx->u.eckey) != 1)
+ ret = krb5_enomem(context);
+ if (ret == 0 && (pctx = EVP_PKEY_CTX_new(ctx->u.eckey, NULL)) == NULL)
+ ret = krb5_enomem(context);
+ if (ret == 0 && EVP_PKEY_derive_init(pctx) != 1)
+ ret = krb5_enomem(context);
+ if (ret == 0 &&
+ EVP_PKEY_CTX_set_ecdh_kdf_type(pctx, EVP_PKEY_ECDH_KDF_NONE) != 1)
+ ret = krb5_enomem(context);
+ if (ret == 0 &&
+ (public = d2i_PublicKey(EVP_PKEY_EC, &template, &in, in_sz)) == NULL)
+ krb5_set_error_message(context,
+ ret = HX509_PARSING_KEY_FAILED,
+ "PKINIT: Can't parse the KDC's ECDH public key");
+ if (ret == 0 &&
+ EVP_PKEY_derive_set_peer_ex(pctx, public, 1) != 1)
+ krb5_set_error_message(context,
+ ret = KRB5KRB_ERR_GENERIC,
+ "Could not derive ECDH shared secret for PKINIT key exchange "
+ "(EVP_PKEY_derive_set_peer_ex)");
+ if (ret == 0 &&
+ (EVP_PKEY_derive(pctx, NULL, &shared_len) != 1 || shared_len == 0))
+ krb5_set_error_message(context,
+ ret = KRB5KRB_ERR_GENERIC,
+ "Could not derive ECDH shared secret for PKINIT key exchange "
+ "(EVP_PKEY_derive to get length)");
+ if (ret == 0 && shared_len > INT_MAX)
+ krb5_set_error_message(context,
+ ret = KRB5KRB_ERR_GENERIC,
+ "Could not derive ECDH shared secret for PKINIT key exchange "
+ "(shared key too large)");
+ if (ret == 0 && (*out = malloc(shared_len)) == NULL)
+ ret = krb5_enomem(context);
+ if (ret == 0 && EVP_PKEY_derive(pctx, *out, &shared_len) != 1)
+ krb5_set_error_message(context,
+ ret = KRB5KRB_ERR_GENERIC,
+ "Could not derive ECDH shared secret for PKINIT key exchange "
+ "(EVP_PKEY_derive)");
+ if (ret == 0)
+ *out_sz = shared_len;
+ EVP_PKEY_CTX_free(pctx); // move
+ EVP_PKEY_free(template);
+
+ return ret;
+#else
+ krb5_error_code ret = 0;
+ int dh_gen_keylen;
+
+ const EC_GROUP *group;
+ EC_KEY *public = NULL;
+
+ group = EC_KEY_get0_group(ctx->u.eckey);
+
+ public = EC_KEY_new();
+ if (public == NULL)
+ return krb5_enomem(context);
+ if (EC_KEY_set_group(public, group) != 1) {
+ EC_KEY_free(public);
+ return krb5_enomem(context);
+ }
+
+ if (o2i_ECPublicKey(&public, &in, in_sz) == NULL) {
+ EC_KEY_free(public);
+ ret = KRB5KRB_ERR_GENERIC;
+ krb5_set_error_message(context, ret,
+ N_("PKINIT: Can't parse ECDH public key", ""));
+ return ret;
+ }
+
+ *out_sz = (EC_GROUP_get_degree(group) + 7) / 8;
+ if (*out_sz < 0)
+ return EOVERFLOW;
+ *out = malloc(*out_sz);
+ if (*out == NULL) {
+ EC_KEY_free(public);
+ return krb5_enomem(context);
+ }
+ dh_gen_keylen = ECDH_compute_key(*out, *out_sz,
+ EC_KEY_get0_public_key(public),
+ ctx->u.eckey, NULL);
+ EC_KEY_free(public);
+ if (dh_gen_keylen <= 0) {
+ ret = KRB5KRB_ERR_GENERIC;
+ dh_gen_keylen = 0;
+ krb5_set_error_message(context, ret,
+ N_("PKINIT: Can't compute ECDH public key", ""));
+ free(*out);
+ *out = NULL;
+ *out_sz = 0;
+ }
+ *out_sz = dh_gen_keylen;
+
+ return ret;
+#endif
+#else
+ krb5_set_error_message(context, ENOTSUP,
+ N_("PKINIT: ECDH not supported", ""));
+ return ENOTSUP;
+#endif
+}
+
+void
+_krb5_pk_eckey_free(void *eckey)
+{
+#ifdef HAVE_HCRYPTO_W_OPENSSL
+#ifdef HAVE_OPENSSL_30
+ EVP_PKEY_free(eckey);
+#else
+ EC_KEY_free(eckey);
+#endif
+#endif
+}
+
+#else
+
+static char lib_krb5_pkinit_ec_c = '\0';
+
+#endif
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