--- /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 <stdio.h>
+#include "cryptlib.h"
+#include <openssl/asn1t.h>
+#include <openssl/x509.h>
+#include <openssl/ec.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;
+ } 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;
+
+ 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;
+ 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);
+ 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;
+ }
+
+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;
+ if (!ctx->pkey || !ctx->peerkey)
+ {
+ ECerr(EC_F_PKEY_EC_DERIVE, EC_R_KEYS_NOT_SET);
+ return 0;
+ }
+
+ if (!key)
+ {
+ const EC_GROUP *group;
+ group = EC_KEY_get0_group(ctx->pkey->pkey.ec);
+ *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, ctx->pkey->pkey.ec, 0);
+ if (ret < 0)
+ return ret;
+ *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;
+ 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_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_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 = 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);
+ }
+ 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;
+ if (ctx->pkey == 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);
+ /* Note: if error return, pkey is freed by parent routine */
+ if (!EVP_PKEY_copy_parameters(pkey, ctx->pkey))
+ 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,
+ pkey_ec_derive,
+
+ pkey_ec_ctrl,
+ pkey_ec_ctrl_str
+
+ };
projects / cassiopeia.git / blobdiff