diff options
| author | Bodo Möller <bodo@openssl.org> | 2002-08-26 11:25:54 +0000 |
|---|---|---|
| committer | Bodo Möller <bodo@openssl.org> | 2002-08-26 11:25:54 +0000 |
| commit | 7e31164ae08fdc00fb62f749f7b6d18aaa75523e (patch) | |
| tree | ed4cdd4f23ae521bfa8eabe9f834d1ba49fd2b9b /crypto/ec/ec_lib.c | |
| parent | ad55f581f93592705617039cd4b5ed8dc02b6192 (diff) | |
| download | openssl-7e31164ae08fdc00fb62f749f7b6d18aaa75523e.zip openssl-7e31164ae08fdc00fb62f749f7b6d18aaa75523e.tar.gz openssl-7e31164ae08fdc00fb62f749f7b6d18aaa75523e.tar.bz2 | |
ASN1 for binary curves
Submitted by: Nils Larsch
Diffstat (limited to 'crypto/ec/ec_lib.c')
| -rw-r--r-- | crypto/ec/ec_lib.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/crypto/ec/ec_lib.c b/crypto/ec/ec_lib.c index 9669f42..9bccb07 100644 --- a/crypto/ec/ec_lib.c +++ b/crypto/ec/ec_lib.c @@ -537,6 +537,45 @@ void EC_GROUP_clear_free_extra_data(EC_GROUP *group) } +int EC_GROUP_get_basis_type(const EC_GROUP *group, unsigned int *k1, + unsigned int *k2, unsigned int *k3) + { + int i = 0; + + if (group == NULL) + return 0; + + if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) != + NID_X9_62_characteristic_two_field) + /* everything else is currently not supported */ + return 0; + + while (group->poly[i] != 0) + 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; + } + /* functions for EC_POINT objects */ EC_POINT *EC_POINT_new(const EC_GROUP *group) |