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authorArne Schwabe <arne@rfc2549.org>2012-04-16 19:21:14 +0200
committerArne Schwabe <arne@rfc2549.org>2012-04-16 19:21:14 +0200
commit3e4d8f433239c40311037616b1b8833a06651ae0 (patch)
tree98ab7fce0d011d34677b0beb762d389cb5c39199 /openssl/crypto/ec/ec_cvt.c
Initial import
Diffstat (limited to 'openssl/crypto/ec/ec_cvt.c')
-rw-r--r--openssl/crypto/ec/ec_cvt.c144
1 files changed, 144 insertions, 0 deletions
diff --git a/openssl/crypto/ec/ec_cvt.c b/openssl/crypto/ec/ec_cvt.c
new file mode 100644
index 00000000..d45640ba
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+++ b/openssl/crypto/ec/ec_cvt.c
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+/* crypto/ec/ec_cvt.c */
+/*
+ * Originally written by Bodo Moeller for the OpenSSL project.
+ */
+/* ====================================================================
+ * Copyright (c) 1998-2002 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
+ * openssl-core@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).
+ *
+ */
+/* ====================================================================
+ * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED.
+ *
+ * Portions of the attached software ("Contribution") are developed by
+ * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project.
+ *
+ * The Contribution is licensed pursuant to the OpenSSL open source
+ * license provided above.
+ *
+ * The elliptic curve binary polynomial software is originally written by
+ * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories.
+ *
+ */
+
+#include <openssl/err.h>
+#include "ec_lcl.h"
+
+
+EC_GROUP *EC_GROUP_new_curve_GFp(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+ {
+ const EC_METHOD *meth;
+ EC_GROUP *ret;
+
+ meth = EC_GFp_nist_method();
+
+ ret = EC_GROUP_new(meth);
+ if (ret == NULL)
+ return NULL;
+
+ if (!EC_GROUP_set_curve_GFp(ret, p, a, b, ctx))
+ {
+ unsigned long err;
+
+ err = ERR_peek_last_error();
+
+ if (!(ERR_GET_LIB(err) == ERR_LIB_EC &&
+ ((ERR_GET_REASON(err) == EC_R_NOT_A_NIST_PRIME) ||
+ (ERR_GET_REASON(err) == EC_R_NOT_A_SUPPORTED_NIST_PRIME))))
+ {
+ /* real error */
+
+ EC_GROUP_clear_free(ret);
+ return NULL;
+ }
+
+
+ /* not an actual error, we just cannot use EC_GFp_nist_method */
+
+ ERR_clear_error();
+
+ EC_GROUP_clear_free(ret);
+ meth = EC_GFp_mont_method();
+
+ ret = EC_GROUP_new(meth);
+ if (ret == NULL)
+ return NULL;
+
+ if (!EC_GROUP_set_curve_GFp(ret, p, a, b, ctx))
+ {
+ EC_GROUP_clear_free(ret);
+ return NULL;
+ }
+ }
+
+ return ret;
+ }
+
+
+EC_GROUP *EC_GROUP_new_curve_GF2m(const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *ctx)
+ {
+ const EC_METHOD *meth;
+ EC_GROUP *ret;
+
+ meth = EC_GF2m_simple_method();
+
+ ret = EC_GROUP_new(meth);
+ if (ret == NULL)
+ return NULL;
+
+ if (!EC_GROUP_set_curve_GF2m(ret, p, a, b, ctx))
+ {
+ EC_GROUP_clear_free(ret);
+ return NULL;
+ }
+
+ return ret;
+ }