move ECC ASN1 that is not specific to ECDSA into crypto/ec/,
authorBodo Möller <bodo@openssl.org>
Mon, 10 Jun 2002 12:41:18 +0000 (12:41 +0000)
committerBodo Möller <bodo@openssl.org>
Mon, 10 Jun 2002 12:41:18 +0000 (12:41 +0000)
and make some appropriate changes to the EC library.

Submitted by: Nils Larsch

crypto/ec/Makefile.ssl
crypto/ec/ec_asn1.c [new file with mode: 0644]
crypto/ec/ec_lcl.h

index 8aefe1e..cd655f6 100644 (file)
@@ -24,10 +24,10 @@ APPS=
 
 LIB=$(TOP)/libcrypto.a
 LIBSRC=        ec_lib.c ecp_smpl.c ecp_mont.c ecp_recp.c ecp_nist.c ec_cvt.c ec_mult.c \
-       ec_err.c ec_curve.c ec_check.c ec_print.c
+       ec_err.c ec_curve.c ec_check.c ec_print.c ec_asn1.c
 
 LIBOBJ=        ec_lib.o ecp_smpl.o ecp_mont.o ecp_recp.o ecp_nist.o ec_cvt.o ec_mult.o \
-       ec_err.o ec_curve.o ec_check.o ec_print.o
+       ec_err.o ec_curve.o ec_check.o ec_print.o ec_asn1.o
 
 SRC= $(LIBSRC)
 
@@ -82,6 +82,16 @@ clean:
 
 # DO NOT DELETE THIS LINE -- make depend depends on it.
 
+ec_asn1.o: ../../e_os.h ../../include/openssl/asn1.h
+ec_asn1.o: ../../include/openssl/asn1t.h ../../include/openssl/bio.h
+ec_asn1.o: ../../include/openssl/bn.h ../../include/openssl/buffer.h
+ec_asn1.o: ../../include/openssl/crypto.h ../../include/openssl/e_os2.h
+ec_asn1.o: ../../include/openssl/ec.h ../../include/openssl/err.h
+ec_asn1.o: ../../include/openssl/lhash.h ../../include/openssl/obj_mac.h
+ec_asn1.o: ../../include/openssl/objects.h ../../include/openssl/opensslconf.h
+ec_asn1.o: ../../include/openssl/opensslv.h ../../include/openssl/ossl_typ.h
+ec_asn1.o: ../../include/openssl/safestack.h ../../include/openssl/stack.h
+ec_asn1.o: ../../include/openssl/symhacks.h ../cryptlib.h ec_asn1.c ec_lcl.h
 ec_check.o: ../../include/openssl/asn1.h ../../include/openssl/bio.h
 ec_check.o: ../../include/openssl/bn.h ../../include/openssl/crypto.h
 ec_check.o: ../../include/openssl/e_os2.h ../../include/openssl/ec.h
diff --git a/crypto/ec/ec_asn1.c b/crypto/ec/ec_asn1.c
new file mode 100644 (file)
index 0000000..9a8b7c9
--- /dev/null
@@ -0,0 +1,885 @@
+/* crypto/ec/ec_asn1.c */
+/* ====================================================================
+ * Copyright (c) 2000-2002 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
+ *    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 "cryptlib.h"
+#include "ec_lcl.h"
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/objects.h>
+
+/* some structures needed for the asn1 encoding */
+typedef struct x9_62_fieldid_st {
+        ASN1_OBJECT *fieldType;
+        ASN1_TYPE   *parameters;
+        } X9_62_FIELDID;
+
+typedef struct x9_62_characteristic_two_st {
+       ASN1_INTEGER *m;
+       ASN1_OBJECT  *basis;
+       ASN1_TYPE    *parameters;
+       } X9_62_CHARACTERISTIC_TWO;
+
+typedef struct x9_62_pentanomial_st {
+       ASN1_INTEGER k1;
+       ASN1_INTEGER k2;
+       ASN1_INTEGER k3;
+       } X9_62_PENTANOMIAL;
+
+typedef struct x9_62_curve_st {
+        ASN1_OCTET_STRING *a;
+        ASN1_OCTET_STRING *b;
+        ASN1_BIT_STRING   *seed;
+        } X9_62_CURVE;
+
+struct ec_parameters_st {
+        ASN1_INTEGER      *version;
+        X9_62_FIELDID     *fieldID;
+        X9_62_CURVE       *curve;
+        ASN1_OCTET_STRING *base;
+        ASN1_INTEGER      *order;
+        ASN1_INTEGER      *cofactor;
+        }/* ECPARAMETERS */;
+
+struct ecpk_parameters_st {
+       int     type;
+       union {
+               ASN1_OBJECT  *named_curve;
+               ECPARAMETERS *parameters;
+               ASN1_NULL    *implicitlyCA;
+       } value;
+       }/* ECPKPARAMETERS */;
+
+/* the OpenSSL asn1 definitions */
+
+ASN1_SEQUENCE(X9_62_FIELDID) = {
+       ASN1_SIMPLE(X9_62_FIELDID, fieldType, ASN1_OBJECT),
+       ASN1_SIMPLE(X9_62_FIELDID, parameters, ASN1_ANY)
+} ASN1_SEQUENCE_END(X9_62_FIELDID)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_FIELDID)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_FIELDID, X9_62_FIELDID)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_FIELDID)
+
+ASN1_SEQUENCE(X9_62_CHARACTERISTIC_TWO) = {
+       ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, m, ASN1_INTEGER),
+       ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, basis, ASN1_OBJECT),
+       ASN1_SIMPLE(X9_62_CHARACTERISTIC_TWO, parameters, ASN1_ANY)
+} ASN1_SEQUENCE_END(X9_62_CHARACTERISTIC_TWO)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO, X9_62_CHARACTERISTIC_TWO)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CHARACTERISTIC_TWO)
+
+ASN1_SEQUENCE(X9_62_PENTANOMIAL) = {
+       ASN1_SIMPLE(X9_62_PENTANOMIAL, k1, ASN1_INTEGER),
+       ASN1_SIMPLE(X9_62_PENTANOMIAL, k2, ASN1_INTEGER),
+       ASN1_SIMPLE(X9_62_PENTANOMIAL, k3, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(X9_62_PENTANOMIAL)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_PENTANOMIAL, X9_62_PENTANOMIAL)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_PENTANOMIAL)
+
+ASN1_SEQUENCE(X9_62_CURVE) = {
+       ASN1_SIMPLE(X9_62_CURVE, a, ASN1_OCTET_STRING),
+       ASN1_SIMPLE(X9_62_CURVE, b, ASN1_OCTET_STRING),
+       ASN1_OPT(X9_62_CURVE, seed, ASN1_BIT_STRING)
+} ASN1_SEQUENCE_END(X9_62_CURVE)
+
+DECLARE_ASN1_FUNCTIONS_const(X9_62_CURVE)
+DECLARE_ASN1_ENCODE_FUNCTIONS_const(X9_62_CURVE, X9_62_CURVE)
+IMPLEMENT_ASN1_FUNCTIONS_const(X9_62_CURVE)
+
+ASN1_SEQUENCE(ECPARAMETERS) = {
+       ASN1_SIMPLE(ECPARAMETERS, version, ASN1_INTEGER),
+       ASN1_SIMPLE(ECPARAMETERS, fieldID, X9_62_FIELDID),
+       ASN1_SIMPLE(ECPARAMETERS, curve, X9_62_CURVE),
+       ASN1_SIMPLE(ECPARAMETERS, base, ASN1_OCTET_STRING),
+       ASN1_SIMPLE(ECPARAMETERS, order, ASN1_INTEGER),
+       ASN1_SIMPLE(ECPARAMETERS, cofactor, ASN1_INTEGER)
+} ASN1_SEQUENCE_END(ECPARAMETERS)
+
+DECLARE_ASN1_FUNCTIONS_const(ECPARAMETERS)
+IMPLEMENT_ASN1_FUNCTIONS_const(ECPARAMETERS)
+
+ASN1_CHOICE(ECPKPARAMETERS) = {
+       ASN1_SIMPLE(ECPKPARAMETERS, value.named_curve, ASN1_OBJECT),
+       ASN1_SIMPLE(ECPKPARAMETERS, value.parameters, ECPARAMETERS),
+       ASN1_SIMPLE(ECPKPARAMETERS, value.implicitlyCA, ASN1_NULL)
+} ASN1_CHOICE_END(ECPKPARAMETERS)
+
+DECLARE_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
+IMPLEMENT_ASN1_FUNCTIONS_const(ECPKPARAMETERS)
+
+/* some internal functions */
+
+static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *, X9_62_FIELDID *);
+static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *, X9_62_CURVE *);
+static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *); 
+static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *, 
+                                              ECPARAMETERS *);
+
+static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group, 
+                                          X9_62_FIELDID *field)
+       {
+       int           ok=0, nid;
+       X9_62_FIELDID *ret=NULL;
+       BIGNUM        *tmp=NULL;
+       
+       if (field == NULL)
+               {
+               if ((ret = X9_62_FIELDID_new()) == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
+                       return NULL;
+                       }
+               }
+       else
+               {       
+               ret = field;
+               if (ret->fieldType != NULL)
+                       ASN1_OBJECT_free(ret->fieldType);
+               if (ret->parameters != NULL)
+                       ASN1_TYPE_free(ret->parameters);
+               }
+
+       nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
+
+       if ((ret->fieldType = OBJ_nid2obj(nid)) == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_OBJ_LIB);
+               goto err;
+               }
+
+       if (nid == NID_X9_62_prime_field)
+               {
+               if ((tmp = BN_new()) == NULL) 
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
+                       goto err;
+                       }
+               if ((ret->parameters = ASN1_TYPE_new()) == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_MALLOC_FAILURE);
+                       goto err;
+                       }
+               ret->parameters->type = V_ASN1_INTEGER;
+               if (!EC_GROUP_get_curve_GFp(group, tmp, NULL, NULL, NULL))
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_EC_LIB);
+                       goto err;
+                       }
+               ret->parameters->value.integer = BN_to_ASN1_INTEGER(tmp, NULL);
+               if (ret->parameters->value.integer == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2FIELDID, ERR_R_ASN1_LIB);
+                       goto err;
+                       }
+               }
+       else
+               goto err;
+
+       ok = 1;
+
+err :  if (!ok)
+       {
+               if (ret && !field)
+                       X9_62_FIELDID_free(ret);
+               ret = NULL;
+       }
+       if (tmp)
+               BN_free(tmp);
+       return(ret);
+}
+
+static X9_62_CURVE *ec_asn1_group2curve(const EC_GROUP *group, 
+                                        X9_62_CURVE *curve)
+       {
+       int           ok=0, nid;
+       X9_62_CURVE   *ret=NULL;
+       BIGNUM        *tmp_1=NULL,
+                     *tmp_2=NULL;
+       unsigned char *buffer_1=NULL,
+                     *buffer_2=NULL,
+                     *a_buf=NULL,
+                     *b_buf=NULL;
+       size_t        len_1, len_2;
+       unsigned char char_zero = 0;
+
+       if ((tmp_1 = BN_new()) == NULL || (tmp_2 = BN_new()) == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+
+       if (curve == NULL)
+               {
+               if ((ret = X9_62_CURVE_new()) == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
+                       goto err;
+                       }
+               }
+       else
+               {
+               ret = curve;
+               if (ret->a)
+                       ASN1_OCTET_STRING_free(ret->a);
+               if (ret->b)
+                       ASN1_OCTET_STRING_free(ret->b);
+               if (ret->seed)
+                       ASN1_BIT_STRING_free(ret->seed);
+               }
+
+       nid = EC_METHOD_get_field_type(EC_GROUP_method_of(group));
+
+       /* get a and b */
+       if (nid == NID_X9_62_prime_field)
+               {
+               if (!EC_GROUP_get_curve_GFp(group, NULL, tmp_1, tmp_2, NULL))
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_EC_LIB);
+                       goto err;
+                       }
+
+               len_1 = (size_t)BN_num_bytes(tmp_1);
+               len_2 = (size_t)BN_num_bytes(tmp_2);
+
+               if (len_1 == 0)
+                       {
+                       /* len_1 == 0 => a == 0 */
+                       a_buf = &char_zero;
+                       len_1 = 1;
+                       }
+               else
+                       {
+                       if ((buffer_1 = OPENSSL_malloc(len_1)) == NULL)
+                               {
+                               ECerr(EC_F_EC_ASN1_GROUP2CURVE,
+                                     ERR_R_MALLOC_FAILURE);
+                               goto err;
+                               }
+                       if ( (len_1 = BN_bn2bin(tmp_1, buffer_1)) == 0)
+                               {
+                               ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
+                               goto err;
+                               }
+                       a_buf = buffer_1;
+                       }
+
+               if (len_2 == 0)
+                       {
+                       /* len_2 == 0 => b == 0 */
+                       b_buf = &char_zero;
+                       len_2 = 1;
+                       }
+               else
+                       {
+                       if ((buffer_2 = OPENSSL_malloc(len_2)) == NULL)
+                               {
+                               ECerr(EC_F_EC_ASN1_GROUP2CURVE,
+                                     ERR_R_MALLOC_FAILURE);
+                               goto err;
+                               }
+                       if ( (len_2 = BN_bn2bin(tmp_2, buffer_2)) == 0)
+                               {
+                               ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_BN_LIB);
+                               goto err;
+                               }
+                       b_buf = buffer_2;
+                       }
+               }
+       else
+               goto err;
+
+       /* set a and b */
+       if ((ret->a = M_ASN1_OCTET_STRING_new()) == NULL || 
+           (ret->b = M_ASN1_OCTET_STRING_new()) == NULL )
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+       if (!M_ASN1_OCTET_STRING_set(ret->a, a_buf, len_1) ||
+           !M_ASN1_OCTET_STRING_set(ret->b, b_buf, len_2))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
+               goto err;
+               }
+       
+       /* set the seed (optional) */
+       if (group->seed)
+               {       
+               if ((ret->seed = ASN1_BIT_STRING_new()) == NULL) goto err;
+               if (!ASN1_BIT_STRING_set(ret->seed, group->seed, 
+                                        (int)group->seed_len))
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2CURVE, ERR_R_ASN1_LIB);
+                       goto err;
+                       }
+               }
+       else
+               ret->seed = NULL;
+
+       ok = 1;
+
+err :  if (!ok)
+       {
+               if (ret && !curve)
+                       X9_62_CURVE_free(ret);
+               ret = NULL;
+       }
+       if (buffer_1)
+               OPENSSL_free(buffer_1);
+       if (buffer_2)
+               OPENSSL_free(buffer_2);
+       if (tmp_1)
+               BN_free(tmp_1);
+       if (tmp_2)
+               BN_free(tmp_2);
+       return(ret);
+}
+
+static ECPARAMETERS *ec_asn1_group2parameters(const EC_GROUP *group,
+                                              ECPARAMETERS *param)
+       {
+       int     ok=0, i;
+       size_t  len=0;
+       ECPARAMETERS   *ret=NULL;
+       BIGNUM         *tmp=NULL;
+       unsigned char  *buffer=NULL;
+       const EC_POINT *point=NULL;
+       point_conversion_form_t form;
+
+       if ((tmp = BN_new()) == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+
+       if (param == NULL)
+       {
+               if ((ret = ECPARAMETERS_new()) == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, 
+                             ERR_R_MALLOC_FAILURE);
+                       goto err;
+                       }
+       }
+       else
+               ret = param;
+
+       /* set the version (always one) */
+       if (ret->version == NULL && !(ret->version = ASN1_INTEGER_new()))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+       if (!ASN1_INTEGER_set(ret->version, (long)0x1))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
+               goto err;
+               }
+
+       /* set the fieldID */
+       ret->fieldID = ec_asn1_group2field(group, ret->fieldID);
+       if (ret->fieldID == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+               goto err;
+               }
+
+       /* set the curve */
+       ret->curve = ec_asn1_group2curve(group, ret->curve);
+       if (ret->curve == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+               goto err;
+               }
+
+       /* set the base point */
+       if ((point = EC_GROUP_get0_generator(group)) == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, EC_R_UNDEFINED_GENERATOR);
+               goto err;
+               }
+
+       i = EC_GROUP_get_asn1_flag(group);
+       if (i | OPENSSL_EC_COMPRESSED)
+               form = POINT_CONVERSION_COMPRESSED;
+       else if (i | OPENSSL_EC_UNCOMPRESSED)
+               form = POINT_CONVERSION_UNCOMPRESSED;
+       else if (i | OPENSSL_EC_HYBRID)
+               form = POINT_CONVERSION_HYBRID;
+       else 
+               goto err;
+
+       len = EC_POINT_point2oct(group, point, form, NULL, len, NULL);
+       if (len == 0)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+               goto err;
+               }
+       if ((buffer = OPENSSL_malloc(len)) == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+       if (!EC_POINT_point2oct(group, point, form, buffer, len, NULL))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+               goto err;
+               }
+       if (ret->base == NULL && (ret->base = ASN1_OCTET_STRING_new()) == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_MALLOC_FAILURE);
+               goto err;
+               }
+       if (!ASN1_OCTET_STRING_set(ret->base, buffer, len))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
+               goto err;
+               }
+
+       /* set the order */
+       if (!EC_GROUP_get_order(group, tmp, NULL))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+               goto err;
+               }
+       ret->order = BN_to_ASN1_INTEGER(tmp, ret->order);
+       if (ret->order == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
+               goto err;
+               }
+
+       /* set the cofactor */
+       if (!EC_GROUP_get_cofactor(group, tmp, NULL))
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_EC_LIB);
+               goto err;
+               }
+       ret->cofactor = BN_to_ASN1_INTEGER(tmp, ret->cofactor);
+       if (ret->cofactor == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS, ERR_R_ASN1_LIB);
+               goto err;
+               }
+
+       ok = 1;
+
+err :  if(!ok)
+               {
+               if (ret && !param)
+                       ECPARAMETERS_free(ret);
+               ret = NULL;
+               }
+       if (tmp)
+               BN_free(tmp);
+       if (buffer)
+               OPENSSL_free(buffer);
+       return(ret);
+       }
+
+ECPKPARAMETERS *EC_ASN1_group2pkparameters(const EC_GROUP *group, 
+                                           ECPKPARAMETERS *params)
+       {
+       int            ok = 1, tmp;
+       ECPKPARAMETERS *ret = params;
+
+       if (ret == NULL)
+               {
+               if ((ret = ECPKPARAMETERS_new()) == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_GROUP2PKPARAMETERS, 
+                             ERR_R_MALLOC_FAILURE);
+                       return NULL;
+                       }
+               }
+       else
+               {
+               if (ret->type == 0 && ret->value.named_curve)
+                       ASN1_OBJECT_free(ret->value.named_curve);
+               else if (ret->type == 1 && ret->value.parameters)
+                       ECPARAMETERS_free(ret->value.parameters);
+               }
+
+       tmp = EC_GROUP_get_asn1_flag(group);
+
+       if (tmp & OPENSSL_EC_NAMED_CURVE)
+               {
+               /* use the asn1 OID to describe the
+                * the elliptic curve parameters
+                */
+               tmp = EC_GROUP_get_nid(group);
+               if (tmp)
+                       {
+                       ret->type = 0;
+                       if ((ret->value.named_curve = OBJ_nid2obj(tmp)) == NULL)
+                               ok = 0;
+                       }
+               else
+                       {
+                       /* we have no nid => use the normal
+                        * ECPARAMETERS structure 
+                        */
+                       ret->type = 1;
+                       if ((ret->value.parameters = ec_asn1_group2parameters(
+                            group, NULL)) == NULL)
+                               ok = 0;
+                       }
+               }
+       else if (tmp & OPENSSL_EC_EXPLICIT)
+               {       
+               /* use the ECPARAMETERS structure */
+               ret->type = 1;
+               if ((ret->value.parameters = ec_asn1_group2parameters(
+                    group, NULL)) == NULL)
+                       ok = 0;
+               }
+       else
+               ok = 0;
+
+       if (!ok)
+               {
+               ECPKPARAMETERS_free(ret);
+               return NULL;
+               }
+       return ret;
+       }
+
+static EC_GROUP *ec_asn1_parameters2group(const ECPARAMETERS *params)
+       {
+       int       ok=0, tmp;
+       EC_GROUP  *ret=NULL;
+       BIGNUM    *p=NULL, *a=NULL, *b=NULL;
+       EC_POINT  *point=NULL;
+
+       if (!params->fieldID || !params->fieldID->fieldType || 
+           !params->fieldID->parameters)
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+               goto err;
+               }
+
+       tmp = OBJ_obj2nid(params->fieldID->fieldType);
+
+       if (tmp == NID_X9_62_characteristic_two_field)
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_NOT_IMPLEMENTED);
+               goto err;
+               }
+       else if (tmp == NID_X9_62_prime_field)
+               {
+               /* we have a curve over a prime field */
+               /* extract the prime number */
+               if (params->fieldID->parameters->type != V_ASN1_INTEGER ||
+                   !params->fieldID->parameters->value.integer)
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+                       goto err;
+                       }
+               p = ASN1_INTEGER_to_BN(params->fieldID->parameters->value.integer, NULL);
+               if (p == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
+                       goto err;
+                       }
+               /* now extract the curve parameters a and b */
+               if (!params->curve || !params->curve->a || 
+                   !params->curve->a->data || !params->curve->b ||
+                   !params->curve->b->data)
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+                       goto err;
+                       }
+               a = BN_bin2bn(params->curve->a->data, 
+                             params->curve->a->length, NULL);
+               if (a == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
+                       goto err;
+                       }
+               b = BN_bin2bn(params->curve->b->data, params->curve->b->length, NULL);
+               if (b == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_BN_LIB);
+                       goto err;
+                       }
+               /* create the EC_GROUP structure */
+/* TODO */
+               ret = EC_GROUP_new_curve_GFp(p, a, b, NULL);
+               if (ret == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
+                       goto err;
+                       }
+               /* create the generator */
+               if ((point = EC_POINT_new(ret)) == NULL) goto err;
+               }
+       else 
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_UNKNOWN_FIELD);
+               goto err;
+               }
+
+       if (params->curve->seed != NULL)
+               {
+               if (ret->seed != NULL)
+                       OPENSSL_free(ret->seed);
+               if (!(ret->seed = OPENSSL_malloc(params->curve->seed->length)))
+                       {
+                       ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, 
+                             ERR_R_MALLOC_FAILURE);
+                       goto err;
+                       }
+               memcpy(ret->seed, params->curve->seed->data, 
+                      params->curve->seed->length);
+               ret->seed_len = params->curve->seed->length;
+               }
+
+       if (!params->order || !params->cofactor || !params->base ||
+           !params->base->data)
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+               goto err;
+               }
+
+
+       a = ASN1_INTEGER_to_BN(params->order, a);
+       b = ASN1_INTEGER_to_BN(params->cofactor, b);
+       if (!a || !b)
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_ASN1_LIB);
+               goto err;
+               }
+
+       if (!EC_POINT_oct2point(ret, point, params->base->data, 
+                               params->base->length, NULL))
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
+               goto err;
+               }
+       if (!EC_GROUP_set_generator(ret, point, a, b))
+               {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, ERR_R_EC_LIB);
+               goto err;
+               }
+
+       ok = 1;
+
+err:   if (!ok)
+               {
+               if (ret) 
+                       EC_GROUP_clear_free(ret);
+               ret = NULL;
+               }
+
+       if (p)  
+               BN_free(p);
+       if (a)  
+               BN_free(a);
+       if (b)  
+               BN_free(b);
+       if (point)      
+               EC_POINT_free(point);
+       return(ret);
+}
+
+EC_GROUP *EC_ASN1_pkparameters2group(const ECPKPARAMETERS *params)
+       {
+       EC_GROUP *ret=NULL;
+       int      tmp=0;
+
+       if (params == NULL)
+               {
+               ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, 
+                     EC_R_MISSING_PARAMETERS);
+               return NULL;
+               }
+
+       if (params->type == 0)
+               { /* the curve is given by an OID */
+               tmp = OBJ_obj2nid(params->value.named_curve);
+               if ((ret = EC_GROUP_new_by_name(tmp)) == NULL)
+                       {
+                       ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, 
+                             EC_R_EC_GROUP_NEW_BY_NAME_FAILURE);
+                       return NULL;
+                       }
+               tmp = EC_GROUP_get_asn1_flag(ret);
+               tmp = (tmp & ~0x03) | OPENSSL_EC_NAMED_CURVE;
+               EC_GROUP_set_asn1_flag(ret, tmp);
+               }
+       else if (params->type == 1)
+               { /* the parameters are given by a ECPARAMETERS
+                  * structure */
+               ret = ec_asn1_parameters2group(params->value.parameters);
+               if (!ret)
+                       {
+                       ECerr(EC_F_EC_ASN1_PKPARAMETERS2GROUP, ERR_R_EC_LIB);
+                       return NULL;
+                       }
+               tmp = EC_GROUP_get_asn1_flag(ret);
+               tmp = (tmp & ~0x03) | OPENSSL_EC_EXPLICIT;
+               EC_GROUP_set_asn1_flag(ret, tmp);
+               }
+       else if (params->type == 2)
+               { /* implicitlyCA */
+               return NULL;
+               }
+       else
+       {
+               ECerr(EC_F_EC_ASN1_PARAMETERS2GROUP, EC_R_ASN1_ERROR);
+               return NULL;
+       }
+
+       return ret;
+}
+
+/* EC_GROUP <-> DER encoding of EC[PK]PARAMETERS */
+
+EC_GROUP *d2i_ECParameters(EC_GROUP **a, const unsigned char **in, long len)
+       {
+       EC_GROUP        *group  = NULL;
+       ECPARAMETERS    *params = NULL;
+
+       if ((params = d2i_ECPARAMETERS(NULL, in, len)) == NULL)
+               {
+               ECerr(EC_F_D2I_ECPARAMETERS, EC_R_D2I_ECPARAMETERS_FAILURE);
+               ECPARAMETERS_free(params);
+               return NULL;
+               }
+       
+       if ((group = ec_asn1_parameters2group(params)) == NULL)
+               {
+               ECerr(EC_F_D2I_ECPARAMETERS, EC_R_PARAMETERS2GROUP_FAILURE);
+               return NULL; 
+               }
+
+       if (a && *a)
+               EC_GROUP_clear_free(*a);
+       if (a)
+               *a = group;
+
+       ECPARAMETERS_free(params);
+       return(group);
+       }
+
+EC_GROUP *d2i_ECPKParameters(EC_GROUP **a, const unsigned char **in, long len)
+       {
+       EC_GROUP        *group  = NULL;
+       ECPKPARAMETERS  *params = NULL;
+
+       if ((params = d2i_ECPKPARAMETERS(NULL, in, len)) == NULL)
+               {
+               ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_D2I_ECPKPARAMETERS_FAILURE);
+               ECPKPARAMETERS_free(params);
+               return NULL;
+               }
+       
+       if ((group = EC_ASN1_pkparameters2group(params)) == NULL)
+               {
+               ECerr(EC_F_D2I_ECPKPARAMETERS, EC_R_PKPARAMETERS2GROUP_FAILURE);
+               return NULL; 
+               }
+
+       
+       if (a && *a)
+               EC_GROUP_clear_free(*a);
+       if (a)
+               *a = group;
+
+       ECPKPARAMETERS_free(params);
+       return(group);
+       }
+
+int i2d_ECParameters(const EC_GROUP *a, unsigned char **out)
+       {
+       int             ret=0;
+       ECPARAMETERS    *tmp = ec_asn1_group2parameters(a, NULL);
+       if (tmp == NULL)
+               {
+               ECerr(EC_F_I2D_ECPARAMETERS, EC_R_GROUP2PARAMETERS_FAILURE);
+               return 0;
+               }
+       if ((ret = i2d_ECPARAMETERS(tmp, out)) == 0)
+               {
+               ECerr(EC_F_I2D_ECPARAMETERS, EC_R_I2D_EC_PARAMETERS_FAILURE);
+               ECPARAMETERS_free(tmp);
+               return 0;
+               }       
+       ECPARAMETERS_free(tmp);
+       return(ret);
+       }
+
+int i2d_ECPKParameters(const EC_GROUP *a, unsigned char **out)
+       {
+       int             ret=0;
+       ECPKPARAMETERS  *tmp = EC_ASN1_group2pkparameters(a, NULL);
+       if (tmp == NULL)
+               {
+               ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_GROUP2PKPARAMETERS_FAILURE);
+               return 0;
+               }
+       if ((ret = i2d_ECPKPARAMETERS(tmp, out)) == 0)
+               {
+               ECerr(EC_F_I2D_ECPKPARAMETERS, EC_R_I2D_ECPKPARAMETERS_FAILURE);
+               ECPKPARAMETERS_free(tmp);
+               return 0;
+               }       
+       ECPKPARAMETERS_free(tmp);
+       return(ret);
+       }
index b9f6fcb..037c7d9 100644 (file)
@@ -65,7 +65,7 @@
 
 struct ec_method_st {
        /* used by EC_METHOD_get_field_type: */
-        int field_type; /* a NID */
+       int field_type; /* a NID */
 
        /* used by EC_GROUP_new, EC_GROUP_free, EC_GROUP_clear_free, EC_GROUP_copy: */
        int (*group_init)(EC_GROUP *);