less specific interface for EC_GROUP_get_basis_type
authorBodo Möller <bodo@openssl.org>
Mon, 26 Aug 2002 18:08:53 +0000 (18:08 +0000)
committerBodo Möller <bodo@openssl.org>
Mon, 26 Aug 2002 18:08:53 +0000 (18:08 +0000)
Submitted by: Nils Larsch, Bodo Moeller

crypto/asn1/t_pkey.c
crypto/ec/ec.h
crypto/ec/ec2_smpl.c
crypto/ec/ec_asn1.c
crypto/ec/ec_err.c
util/libeay.num

index 0a20311..0112f7c 100644 (file)
@@ -420,8 +420,7 @@ int ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off)
                if (is_char_two)
                        {
                        /* print the 'short name' of the base type OID */
-                       int basis_type = EC_GROUP_get_basis_type(x, NULL,
-                               NULL, NULL);
+                       int basis_type = EC_GROUP_get_basis_type(x);
                        if (basis_type == 0)
                                goto err;
 
index e401eb7..faca04a 100644 (file)
@@ -257,9 +257,10 @@ int EC_GROUP_precompute_mult(EC_GROUP *, BN_CTX *);
 /* ASN1 stuff */
 
 /* EC_GROUP_get_basis_type() returns the NID of the basis type
- * used to represent the field elements (in case of a pentanomial or trinomial
- * basis the coefficient are returned in the k? arguments) */
-int EC_GROUP_get_basis_type(const EC_GROUP *, unsigned int *k1,
+ * used to represent the field elements */
+int EC_GROUP_get_basis_type(const EC_GROUP *);
+int EC_GROUP_get_trinomial_basis(const EC_GROUP *, unsigned int *k);
+int EC_GROUP_get_pentanomial_basis(const EC_GROUP *, unsigned int *k1, 
        unsigned int *k2, unsigned int *k3);
 
 #define OPENSSL_EC_NAMED_CURVE 0x001
@@ -372,6 +373,7 @@ void ERR_load_EC_strings(void);
 #define EC_F_EC_ASN1_PARAMETERS2GROUP                   157
 #define EC_F_EC_ASN1_PKPARAMETERS2GROUP                         158
 #define EC_F_EC_GF2M_SIMPLE_GROUP_CHECK_DISCRIMINANT    159
+#define EC_F_EC_GF2M_SIMPLE_GROUP_SET_CURVE             195
 #define EC_F_EC_GF2M_SIMPLE_OCT2POINT                   160
 #define EC_F_EC_GF2M_SIMPLE_POINT2OCT                   161
 #define EC_F_EC_GF2M_SIMPLE_POINT_GET_AFFINE_COORDINATES 162
@@ -405,6 +407,8 @@ void ERR_load_EC_strings(void);
 #define EC_F_EC_GROUP_GET_DEGREE                        173
 #define EC_F_EC_GROUP_GET_EXTRA_DATA                    107
 #define EC_F_EC_GROUP_GET_ORDER                                 141
+#define EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS             193
+#define EC_F_EC_GROUP_GET_TRINOMIAL_BASIS               194
 #define EC_F_EC_GROUP_GROUP2NID                                 147
 #define EC_F_EC_GROUP_NEW                               108
 #define EC_F_EC_GROUP_NEW_BY_NID                        174
@@ -481,6 +485,7 @@ void ERR_load_EC_strings(void);
 #define EC_R_UNDEFINED_ORDER                            128
 #define EC_R_UNKNOWN_GROUP                              129
 #define EC_R_UNKNOWN_ORDER                              114
+#define EC_R_UNSUPPORTED_FIELD                          131
 #define EC_R_WRONG_ORDER                                130
 
 #ifdef  __cplusplus
index 980d396..ece8abb 100644 (file)
@@ -200,7 +200,11 @@ int ec_GF2m_simple_group_set_curve(EC_GROUP *group,
        /* group->field */
        if (!BN_copy(&group->field, p)) goto err;
        i = BN_GF2m_poly2arr(&group->field, group->poly, 5);
-       if ((i != 5) && (i != 3)) goto err;
+       if ((i != 5) && (i != 3))
+               {
+               ECerr(EC_F_EC_GF2M_SIMPLE_GROUP_SET_CURVE, EC_R_UNSUPPORTED_FIELD);
+               goto err;
+               }
 
        /* group->a */
        if (!BN_GF2m_mod_arr(&group->a, a, group->poly)) goto err;
index 8b0167b..63d33a5 100644 (file)
 #include <openssl/objects.h>
 
 
-int EC_GROUP_get_basis_type(const EC_GROUP *group, unsigned int *k1, 
-       unsigned int *k2, unsigned int *k3)
+int EC_GROUP_get_basis_type(const EC_GROUP *group)
        {
-       int i = 0;
-
-       if (group == NULL)
-               return 0;
+       int i=0;
 
        if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) !=
                NID_X9_62_characteristic_two_field)
@@ -80,28 +76,55 @@ int EC_GROUP_get_basis_type(const EC_GROUP *group, unsigned int *k1,
                i++;
 
        if (i == 4)
-               {
-               if (k1)
-                       *k1 = group->poly[3];
-               if (k2)
-                       *k2 = group->poly[2];
-               if (k3)
-                       *k3 = group->poly[1];
-
                return NID_X9_62_ppBasis;
-               }
        else if (i == 2)
-               {
-               if (k1)
-                       *k1 = group->poly[1];
-
                return NID_X9_62_tpBasis;
-               }
        else
                /* everything else is currently not supported */
                return 0;
        }
 
+int EC_GROUP_get_trinomial_basis(const EC_GROUP *group, unsigned int *k)
+       {
+       if (group == NULL)
+               return 0;
+
+       if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
+           || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] == 0)))
+               {
+               ECerr(EC_F_EC_GROUP_GET_TRINOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+               return 0;
+               }
+
+       if (k)
+               *k = group->poly[1];
+
+       return 1;
+       }
+
+int EC_GROUP_get_pentanomial_basis(const EC_GROUP *group, unsigned int *k1,
+       unsigned int *k2, unsigned int *k3)
+       {
+       if (group == NULL)
+               return 0;
+
+       if (EC_GROUP_method_of(group)->group_set_curve != ec_GF2m_simple_group_set_curve
+           || !((group->poly[0] != 0) && (group->poly[1] != 0) && (group->poly[2] != 0) && (group->poly[3] != 0) && (group->poly[4] == 0)))
+               {
+               ECerr(EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
+               return 0;
+               }
+
+       if (k1)
+               *k1 = group->poly[3];
+       if (k2)
+               *k2 = group->poly[2];
+       if (k3)
+               *k3 = group->poly[1];
+
+       return 1;
+       }
+
 
 
 /* some structures needed for the asn1 encoding */
@@ -323,7 +346,6 @@ static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
        else    /* nid == NID_X9_62_characteristic_two_field */
                {
                int             field_type;
-               unsigned int    k1, k2, k3;
 
                char_two = X9_62_CHARACTERISTIC_TWO_new();
                if (char_two == NULL)
@@ -334,7 +356,7 @@ static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
        
                char_two->m = (long)EC_GROUP_get_degree(group);
 
-               field_type = EC_GROUP_get_basis_type(group, &k1, &k2, &k3);
+               field_type = EC_GROUP_get_basis_type(group);
 
                if (field_type == 0)
                        {
@@ -350,6 +372,11 @@ static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
 
                if (field_type == NID_X9_62_tpBasis)
                        {
+                       unsigned int k;
+
+                       if (!EC_GROUP_get_trinomial_basis(group, &k))
+                               goto err;
+
                        char_two->parameters->type = V_ASN1_INTEGER;
                        char_two->parameters->value.integer = 
                                ASN1_INTEGER_new();
@@ -359,7 +386,7 @@ static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
                                        ERR_R_ASN1_LIB);
                                goto err;
                                }
-                       if (!ASN1_INTEGER_set(char_two->parameters->value.integer, (long)k1))
+                       if (!ASN1_INTEGER_set(char_two->parameters->value.integer, (long)k))
                                {
                                ECerr(EC_F_EC_ASN1_GROUP2PARAMETERS,
                                        ERR_R_ASN1_LIB);
@@ -368,6 +395,11 @@ static X9_62_FIELDID *ec_asn1_group2field(const EC_GROUP *group,
                        }
                else if (field_type == NID_X9_62_ppBasis)
                        {
+                       unsigned int k1, k2, k3;
+
+                       if (!EC_GROUP_get_pentanomial_basis(group, &k1, &k2, &k3))
+                               goto err;
+
                        penta = X9_62_PENTANOMIAL_new();
                        /* set k? values */
                        penta->k1 = (long)k1;
index 3a0f3f1..8ae2c00 100644 (file)
@@ -83,6 +83,7 @@ static ERR_STRING_DATA EC_str_functs[]=
 {ERR_PACK(0,EC_F_EC_ASN1_PARAMETERS2GROUP,0),  "EC_ASN1_PARAMETERS2GROUP"},
 {ERR_PACK(0,EC_F_EC_ASN1_PKPARAMETERS2GROUP,0),        "EC_ASN1_PKPARAMETERS2GROUP"},
 {ERR_PACK(0,EC_F_EC_GF2M_SIMPLE_GROUP_CHECK_DISCRIMINANT,0),   "ec_GF2m_simple_group_check_discriminant"},
+{ERR_PACK(0,EC_F_EC_GF2M_SIMPLE_GROUP_SET_CURVE,0),    "ec_GF2m_simple_group_set_curve"},
 {ERR_PACK(0,EC_F_EC_GF2M_SIMPLE_OCT2POINT,0),  "ec_GF2m_simple_oct2point"},
 {ERR_PACK(0,EC_F_EC_GF2M_SIMPLE_POINT2OCT,0),  "ec_GF2m_simple_point2oct"},
 {ERR_PACK(0,EC_F_EC_GF2M_SIMPLE_POINT_GET_AFFINE_COORDINATES,0),       "ec_GF2m_simple_point_get_affine_coordinates"},
@@ -116,6 +117,8 @@ static ERR_STRING_DATA EC_str_functs[]=
 {ERR_PACK(0,EC_F_EC_GROUP_GET_DEGREE,0),       "EC_GROUP_get_degree"},
 {ERR_PACK(0,EC_F_EC_GROUP_GET_EXTRA_DATA,0),   "EC_GROUP_get_extra_data"},
 {ERR_PACK(0,EC_F_EC_GROUP_GET_ORDER,0),        "EC_GROUP_get_order"},
+{ERR_PACK(0,EC_F_EC_GROUP_GET_PENTANOMIAL_BASIS,0),    "EC_GROUP_get_pentanomial_basis"},
+{ERR_PACK(0,EC_F_EC_GROUP_GET_TRINOMIAL_BASIS,0),      "EC_GROUP_get_trinomial_basis"},
 {ERR_PACK(0,EC_F_EC_GROUP_GROUP2NID,0),        "EC_GROUP_GROUP2NID"},
 {ERR_PACK(0,EC_F_EC_GROUP_NEW,0),      "EC_GROUP_new"},
 {ERR_PACK(0,EC_F_EC_GROUP_NEW_BY_NID,0),       "EC_GROUP_new_by_nid"},
@@ -195,6 +198,7 @@ static ERR_STRING_DATA EC_str_reasons[]=
 {EC_R_UNDEFINED_ORDER                    ,"undefined order"},
 {EC_R_UNKNOWN_GROUP                      ,"unknown group"},
 {EC_R_UNKNOWN_ORDER                      ,"unknown order"},
+{EC_R_UNSUPPORTED_FIELD                  ,"unsupported field"},
 {EC_R_WRONG_ORDER                        ,"wrong order"},
 {0,NULL}
        };
index 5a28ed1..7f86dbc 100755 (executable)
@@ -3007,3 +3007,5 @@ EC_GROUP_get0_comment                   3440      EXIST::FUNCTION:EC
 ec_group_index2nid                      3441   EXIST::FUNCTION:EC
 EC_GROUP_get_basis_type                 3442   EXIST::FUNCTION:EC
 X509_REQ_print_ex                       3443   EXIST::FUNCTION:BIO
+EC_GROUP_get_pentanomial_basis          3444   EXIST::FUNCTION:EC
+EC_GROUP_get_trinomial_basis            3445   EXIST::FUNCTION:EC