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Diffstat (limited to 'thirdparty/openssl/crypto/ec/ec_pmeth.c')
-rw-r--r--thirdparty/openssl/crypto/ec/ec_pmeth.c530
1 files changed, 530 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/ec/ec_pmeth.c b/thirdparty/openssl/crypto/ec/ec_pmeth.c
new file mode 100644
index 0000000000..b76749010c
--- /dev/null
+++ b/thirdparty/openssl/crypto/ec/ec_pmeth.c
@@ -0,0 +1,530 @@
+/*
+ * 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 <stdio.h>
+#include "cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/x509.h>
+#include <openssl/ec.h>
+#include "ec_lcl.h"
+#include <openssl/ecdsa.h>
+#include <openssl/evp.h>
+#include "evp_locl.h"
+
+/* EC pkey context structure */
+
+typedef struct {
+ /* Key and paramgen group */
+ EC_GROUP *gen_group;
+ /* message digest */
+ const EVP_MD *md;
+ /* Duplicate key if custom cofactor needed */
+ EC_KEY *co_key;
+ /* Cofactor mode */
+ signed char cofactor_mode;
+ /* KDF (if any) to use for ECDH */
+ char kdf_type;
+ /* Message digest to use for key derivation */
+ const EVP_MD *kdf_md;
+ /* User key material */
+ unsigned char *kdf_ukm;
+ size_t kdf_ukmlen;
+ /* KDF output length */
+ size_t kdf_outlen;
+} 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;
+ dctx->gen_group = NULL;
+ dctx->md = NULL;
+
+ dctx->cofactor_mode = -1;
+ dctx->co_key = NULL;
+ dctx->kdf_type = EVP_PKEY_ECDH_KDF_NONE;
+ dctx->kdf_md = NULL;
+ dctx->kdf_outlen = 0;
+ dctx->kdf_ukm = NULL;
+ dctx->kdf_ukmlen = 0;
+
+ 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;
+ if (sctx->gen_group) {
+ dctx->gen_group = EC_GROUP_dup(sctx->gen_group);
+ if (!dctx->gen_group)
+ return 0;
+ }
+ dctx->md = sctx->md;
+
+ if (sctx->co_key) {
+ dctx->co_key = EC_KEY_dup(sctx->co_key);
+ if (!dctx->co_key)
+ return 0;
+ }
+ dctx->kdf_type = sctx->kdf_type;
+ dctx->kdf_md = sctx->kdf_md;
+ dctx->kdf_outlen = sctx->kdf_outlen;
+ if (sctx->kdf_ukm) {
+ dctx->kdf_ukm = BUF_memdup(sctx->kdf_ukm, sctx->kdf_ukmlen);
+ if (!dctx->kdf_ukm)
+ return 0;
+ } else
+ dctx->kdf_ukm = NULL;
+ dctx->kdf_ukmlen = sctx->kdf_ukmlen;
+ return 1;
+}
+
+static void pkey_ec_cleanup(EVP_PKEY_CTX *ctx)
+{
+ EC_PKEY_CTX *dctx = ctx->data;
+ if (dctx) {
+ if (dctx->gen_group)
+ EC_GROUP_free(dctx->gen_group);
+ if (dctx->co_key)
+ EC_KEY_free(dctx->co_key);
+ if (dctx->kdf_ukm)
+ OPENSSL_free(dctx->kdf_ukm);
+ OPENSSL_free(dctx);
+ }
+}
+
+static int pkey_ec_sign(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
+ const unsigned char *tbs, size_t tbslen)
+{
+ int ret, type;
+ unsigned int sltmp;
+ EC_PKEY_CTX *dctx = ctx->data;
+ EC_KEY *ec = ctx->pkey->pkey.ec;
+
+ if (!sig) {
+ *siglen = ECDSA_size(ec);
+ return 1;
+ } else if (*siglen < (size_t)ECDSA_size(ec)) {
+ ECerr(EC_F_PKEY_EC_SIGN, EC_R_BUFFER_TOO_SMALL);
+ return 0;
+ }
+
+ if (dctx->md)
+ type = EVP_MD_type(dctx->md);
+ else
+ type = NID_sha1;
+
+ ret = ECDSA_sign(type, tbs, tbslen, sig, &sltmp, ec);
+
+ if (ret <= 0)
+ return ret;
+ *siglen = (size_t)sltmp;
+ return 1;
+}
+
+static int pkey_ec_verify(EVP_PKEY_CTX *ctx,
+ const unsigned char *sig, size_t siglen,
+ const unsigned char *tbs, size_t tbslen)
+{
+ int ret, type;
+ EC_PKEY_CTX *dctx = ctx->data;
+ EC_KEY *ec = ctx->pkey->pkey.ec;
+
+ if (dctx->md)
+ type = EVP_MD_type(dctx->md);
+ else
+ type = NID_sha1;
+
+ ret = ECDSA_verify(type, tbs, tbslen, sig, siglen, ec);
+
+ return ret;
+}
+
+#ifndef OPENSSL_NO_ECDH
+static int pkey_ec_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
+ size_t *keylen)
+{
+ int ret;
+ size_t outlen;
+ const EC_POINT *pubkey = NULL;
+ EC_KEY *eckey;
+ EC_PKEY_CTX *dctx = ctx->data;
+ if (!ctx->pkey || !ctx->peerkey) {
+ ECerr(EC_F_PKEY_EC_DERIVE, EC_R_KEYS_NOT_SET);
+ return 0;
+ }
+
+ eckey = dctx->co_key ? dctx->co_key : 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_kdf_derive(EVP_PKEY_CTX *ctx,
+ unsigned char *key, size_t *keylen)
+{
+ EC_PKEY_CTX *dctx = ctx->data;
+ unsigned char *ktmp = NULL;
+ size_t ktmplen;
+ int rv = 0;
+ if (dctx->kdf_type == EVP_PKEY_ECDH_KDF_NONE)
+ return pkey_ec_derive(ctx, key, keylen);
+ if (!key) {
+ *keylen = dctx->kdf_outlen;
+ return 1;
+ }
+ if (*keylen != dctx->kdf_outlen)
+ return 0;
+ if (!pkey_ec_derive(ctx, NULL, &ktmplen))
+ return 0;
+ ktmp = OPENSSL_malloc(ktmplen);
+ if (!ktmp)
+ return 0;
+ if (!pkey_ec_derive(ctx, ktmp, &ktmplen))
+ goto err;
+ /* Do KDF stuff */
+ if (!ECDH_KDF_X9_62(key, *keylen, ktmp, ktmplen,
+ dctx->kdf_ukm, dctx->kdf_ukmlen, dctx->kdf_md))
+ goto err;
+ rv = 1;
+
+ err:
+ if (ktmp) {
+ OPENSSL_cleanse(ktmp, ktmplen);
+ OPENSSL_free(ktmp);
+ }
+ return rv;
+}
+#endif
+
+static int pkey_ec_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
+{
+ EC_PKEY_CTX *dctx = ctx->data;
+ EC_GROUP *group;
+ switch (type) {
+ case EVP_PKEY_CTRL_EC_PARAMGEN_CURVE_NID:
+ group = EC_GROUP_new_by_curve_name(p1);
+ if (group == NULL) {
+ ECerr(EC_F_PKEY_EC_CTRL, EC_R_INVALID_CURVE);
+ return 0;
+ }
+ if (dctx->gen_group)
+ EC_GROUP_free(dctx->gen_group);
+ dctx->gen_group = group;
+ return 1;
+
+ case EVP_PKEY_CTRL_EC_PARAM_ENC:
+ if (!dctx->gen_group) {
+ ECerr(EC_F_PKEY_EC_CTRL, EC_R_NO_PARAMETERS_SET);
+ return 0;
+ }
+ EC_GROUP_set_asn1_flag(dctx->gen_group, p1);
+ return 1;
+
+#ifndef OPENSSL_NO_ECDH
+ case EVP_PKEY_CTRL_EC_ECDH_COFACTOR:
+ if (p1 == -2) {
+ if (dctx->cofactor_mode != -1)
+ return dctx->cofactor_mode;
+ else {
+ EC_KEY *ec_key = ctx->pkey->pkey.ec;
+ return EC_KEY_get_flags(ec_key) & EC_FLAG_COFACTOR_ECDH ? 1 :
+ 0;
+ }
+ } else if (p1 < -1 || p1 > 1)
+ return -2;
+ dctx->cofactor_mode = p1;
+ if (p1 != -1) {
+ EC_KEY *ec_key = ctx->pkey->pkey.ec;
+ if (!ec_key->group)
+ return -2;
+ /* If cofactor is 1 cofactor mode does nothing */
+ if (BN_is_one(&ec_key->group->cofactor))
+ return 1;
+ if (!dctx->co_key) {
+ dctx->co_key = EC_KEY_dup(ec_key);
+ if (!dctx->co_key)
+ return 0;
+ }
+ if (p1)
+ EC_KEY_set_flags(dctx->co_key, EC_FLAG_COFACTOR_ECDH);
+ else
+ EC_KEY_clear_flags(dctx->co_key, EC_FLAG_COFACTOR_ECDH);
+ } else if (dctx->co_key) {
+ EC_KEY_free(dctx->co_key);
+ dctx->co_key = NULL;
+ }
+ return 1;
+#endif
+
+ case EVP_PKEY_CTRL_EC_KDF_TYPE:
+ if (p1 == -2)
+ return dctx->kdf_type;
+ if (p1 != EVP_PKEY_ECDH_KDF_NONE && p1 != EVP_PKEY_ECDH_KDF_X9_62)
+ return -2;
+ dctx->kdf_type = p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_EC_KDF_MD:
+ dctx->kdf_md = p2;
+ return 1;
+
+ case EVP_PKEY_CTRL_GET_EC_KDF_MD:
+ *(const EVP_MD **)p2 = dctx->kdf_md;
+ return 1;
+
+ case EVP_PKEY_CTRL_EC_KDF_OUTLEN:
+ if (p1 <= 0)
+ return -2;
+ dctx->kdf_outlen = (size_t)p1;
+ return 1;
+
+ case EVP_PKEY_CTRL_GET_EC_KDF_OUTLEN:
+ *(int *)p2 = dctx->kdf_outlen;
+ return 1;
+
+ case EVP_PKEY_CTRL_EC_KDF_UKM:
+ if (dctx->kdf_ukm)
+ OPENSSL_free(dctx->kdf_ukm);
+ dctx->kdf_ukm = p2;
+ if (p2)
+ dctx->kdf_ukmlen = p1;
+ else
+ dctx->kdf_ukmlen = 0;
+ return 1;
+
+ case EVP_PKEY_CTRL_GET_EC_KDF_UKM:
+ *(unsigned char **)p2 = dctx->kdf_ukm;
+ return dctx->kdf_ukmlen;
+
+ 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) {
+ ECerr(EC_F_PKEY_EC_CTRL, EC_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 */
+ case EVP_PKEY_CTRL_DIGESTINIT:
+ case EVP_PKEY_CTRL_PKCS7_SIGN:
+ case EVP_PKEY_CTRL_CMS_SIGN:
+ return 1;
+
+ default:
+ return -2;
+
+ }
+}
+
+static int pkey_ec_ctrl_str(EVP_PKEY_CTX *ctx,
+ const char *type, const char *value)
+{
+ if (!strcmp(type, "ec_paramgen_curve")) {
+ int nid;
+ nid = EC_curve_nist2nid(value);
+ if (nid == NID_undef)
+ nid = OBJ_sn2nid(value);
+ if (nid == NID_undef)
+ nid = OBJ_ln2nid(value);
+ if (nid == NID_undef) {
+ ECerr(EC_F_PKEY_EC_CTRL_STR, EC_R_INVALID_CURVE);
+ return 0;
+ }
+ return EVP_PKEY_CTX_set_ec_paramgen_curve_nid(ctx, nid);
+ } else if (!strcmp(type, "ec_param_enc")) {
+ int param_enc;
+ if (!strcmp(value, "explicit"))
+ param_enc = 0;
+ else if (!strcmp(value, "named_curve"))
+ param_enc = OPENSSL_EC_NAMED_CURVE;
+ else
+ return -2;
+ return EVP_PKEY_CTX_set_ec_param_enc(ctx, param_enc);
+ } else if (!strcmp(type, "ecdh_kdf_md")) {
+ const EVP_MD *md;
+ if (!(md = EVP_get_digestbyname(value))) {
+ ECerr(EC_F_PKEY_EC_CTRL_STR, EC_R_INVALID_DIGEST);
+ return 0;
+ }
+ return EVP_PKEY_CTX_set_ecdh_kdf_md(ctx, md);
+ } else if (!strcmp(type, "ecdh_cofactor_mode")) {
+ int co_mode;
+ co_mode = atoi(value);
+ return EVP_PKEY_CTX_set_ecdh_cofactor_mode(ctx, co_mode);
+ }
+
+ return -2;
+}
+
+static int pkey_ec_paramgen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+{
+ EC_KEY *ec = NULL;
+ EC_PKEY_CTX *dctx = ctx->data;
+ int ret = 0;
+ if (dctx->gen_group == NULL) {
+ ECerr(EC_F_PKEY_EC_PARAMGEN, EC_R_NO_PARAMETERS_SET);
+ return 0;
+ }
+ ec = EC_KEY_new();
+ if (!ec)
+ return 0;
+ ret = EC_KEY_set_group(ec, dctx->gen_group);
+ if (ret)
+ EVP_PKEY_assign_EC_KEY(pkey, ec);
+ else
+ EC_KEY_free(ec);
+ return ret;
+}
+
+static int pkey_ec_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+{
+ EC_KEY *ec = NULL;
+ EC_PKEY_CTX *dctx = ctx->data;
+ if (ctx->pkey == NULL && dctx->gen_group == NULL) {
+ ECerr(EC_F_PKEY_EC_KEYGEN, EC_R_NO_PARAMETERS_SET);
+ return 0;
+ }
+ ec = EC_KEY_new();
+ if (!ec)
+ return 0;
+ EVP_PKEY_assign_EC_KEY(pkey, ec);
+ if (ctx->pkey) {
+ /* Note: if error return, pkey is freed by parent routine */
+ if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
+ return 0;
+ } else {
+ if (!EC_KEY_set_group(ec, dctx->gen_group))
+ return 0;
+ }
+ return EC_KEY_generate_key(pkey->pkey.ec);
+}
+
+const EVP_PKEY_METHOD ec_pkey_meth = {
+ EVP_PKEY_EC,
+ 0,
+ pkey_ec_init,
+ pkey_ec_copy,
+ pkey_ec_cleanup,
+
+ 0,
+ pkey_ec_paramgen,
+
+ 0,
+ pkey_ec_keygen,
+
+ 0,
+ pkey_ec_sign,
+
+ 0,
+ pkey_ec_verify,
+
+ 0, 0,
+
+ 0, 0, 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0,
+#ifndef OPENSSL_NO_ECDH
+ pkey_ec_kdf_derive,
+#else
+ 0,
+#endif
+
+ pkey_ec_ctrl,
+ pkey_ec_ctrl_str
+};
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