--- /dev/null
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2006.
+ */
+/* ====================================================================
+ * Copyright (c) 2006 The OpenSSL Project. 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. All advertising materials mentioning features or use of this
+ * software must display the following acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For written permission, please contact
+ * licensing@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ * nor may "OpenSSL" appear in their names without prior written
+ * permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by the OpenSSL Project
+ * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED 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 OpenSSL PROJECT OR
+ * ITS 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.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com). This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com). */
+
+#include <openssl/evp.h>
+
+#include <string.h>
+
+#include <openssl/bn.h>
+#include <openssl/buf.h>
+#include <openssl/digest.h>
+#include <openssl/ec.h>
+#include <openssl/ec_key.h>
+#include <openssl/ecdh.h>
+#include <openssl/ecdsa.h>
+#include <openssl/err.h>
+#include <openssl/mem.h>
+#include <openssl/nid.h>
+
+#include "internal.h"
+#include "../fipsmodule/ec/internal.h"
+#include "../internal.h"
+
+
+typedef struct {
+ // message digest
+ const EVP_MD *md;
+} EC_PKEY_CTX;
+
+
+static int pkey_ec_init(EVP_PKEY_CTX *ctx) {
+ EC_PKEY_CTX *dctx;
+ dctx = OPENSSL_malloc(sizeof(EC_PKEY_CTX));
+ if (!dctx) {
+ return 0;
+ }
+ OPENSSL_memset(dctx, 0, sizeof(EC_PKEY_CTX));
+
+ ctx->data = dctx;
+
+ return 1;
+}
+
+static int pkey_ec_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src) {
+ EC_PKEY_CTX *dctx, *sctx;
+ if (!pkey_ec_init(dst)) {
+ return 0;
+ }
+ sctx = src->data;
+ dctx = dst->data;
+
+ dctx->md = sctx->md;
+
+ return 1;
+}
+
+static void pkey_ec_cleanup(EVP_PKEY_CTX *ctx) {
+ EC_PKEY_CTX *dctx = ctx->data;
+ if (!dctx) {
+ return;
+ }
+
+ OPENSSL_free(dctx);
+}
+
+static int pkey_ec_sign(EVP_PKEY_CTX *ctx, uint8_t *sig, size_t *siglen,
+ const uint8_t *tbs, size_t tbslen) {
+ unsigned int sltmp;
+ EC_KEY *ec = ctx->pkey->pkey.ec;
+
+ if (!sig) {
+ *siglen = ECDSA_size(ec);
+ return 1;
+ } else if (*siglen < (size_t)ECDSA_size(ec)) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_BUFFER_TOO_SMALL);
+ return 0;
+ }
+
+ if (!ECDSA_sign(0, tbs, tbslen, sig, &sltmp, ec)) {
+ return 0;
+ }
+ *siglen = (size_t)sltmp;
+ return 1;
+}
+
+static int pkey_ec_verify(EVP_PKEY_CTX *ctx, const uint8_t *sig, size_t siglen,
+ const uint8_t *tbs, size_t tbslen) {
+ return ECDSA_verify(0, tbs, tbslen, sig, siglen, ctx->pkey->pkey.ec);
+}
+
+static int pkey_ec_derive(EVP_PKEY_CTX *ctx, uint8_t *key,
+ size_t *keylen) {
+ int ret;
+ size_t outlen;
+ const EC_POINT *pubkey = NULL;
+ EC_KEY *eckey;
+
+ if (!ctx->pkey || !ctx->peerkey) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_KEYS_NOT_SET);
+ return 0;
+ }
+
+ eckey = ctx->pkey->pkey.ec;
+
+ if (!key) {
+ const EC_GROUP *group;
+ group = EC_KEY_get0_group(eckey);
+ *keylen = (EC_GROUP_get_degree(group) + 7) / 8;
+ return 1;
+ }
+ pubkey = EC_KEY_get0_public_key(ctx->peerkey->pkey.ec);
+
+ // NB: unlike PKCS#3 DH, if *outlen is less than maximum size this is
+ // not an error, the result is truncated.
+
+ outlen = *keylen;
+
+ ret = ECDH_compute_key(key, outlen, pubkey, eckey, 0);
+ if (ret < 0) {
+ return 0;
+ }
+ *keylen = ret;
+ return 1;
+}
+
+static int pkey_ec_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2) {
+ EC_PKEY_CTX *dctx = ctx->data;
+
+ switch (type) {
+ case EVP_PKEY_CTRL_MD:
+ if (EVP_MD_type((const EVP_MD *)p2) != NID_sha1 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_ecdsa_with_SHA1 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha224 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha256 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha384 &&
+ EVP_MD_type((const EVP_MD *)p2) != NID_sha512) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_INVALID_DIGEST_TYPE);
+ return 0;
+ }
+ dctx->md = p2;
+ return 1;
+
+ case EVP_PKEY_CTRL_GET_MD:
+ *(const EVP_MD **)p2 = dctx->md;
+ return 1;
+
+ case EVP_PKEY_CTRL_PEER_KEY:
+ // Default behaviour is OK
+ return 1;
+
+ default:
+ OPENSSL_PUT_ERROR(EVP, EVP_R_COMMAND_NOT_SUPPORTED);
+ return 0;
+ }
+}
+
+static int pkey_ec_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey) {
+ if (ctx->pkey == NULL) {
+ OPENSSL_PUT_ERROR(EVP, EVP_R_NO_PARAMETERS_SET);
+ return 0;
+ }
+ EC_KEY *ec = EC_KEY_new();
+ if (ec == NULL ||
+ !EC_KEY_set_group(ec, EC_KEY_get0_group(ctx->pkey->pkey.ec)) ||
+ !EC_KEY_generate_key(ec)) {
+ EC_KEY_free(ec);
+ return 0;
+ }
+ EVP_PKEY_assign_EC_KEY(pkey, ec);
+ return 1;
+}
+
+const EVP_PKEY_METHOD ec_pkey_meth = {
+ EVP_PKEY_EC,
+ pkey_ec_init,
+ pkey_ec_copy,
+ pkey_ec_cleanup,
+ pkey_ec_keygen,
+ pkey_ec_sign,
+ NULL /* sign_message */,
+ pkey_ec_verify,
+ NULL /* verify_message */,
+ NULL /* verify_recover */,
+ NULL /* encrypt */,
+ NULL /* decrypt */,
+ pkey_ec_derive,
+ pkey_ec_ctrl,
+};
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