Import OpenSSL 1.0.2s
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@@ -14,7 +14,7 @@
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*
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*/
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/* ====================================================================
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* Copyright (c) 1998-2005 The OpenSSL Project. All rights reserved.
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* Copyright (c) 1998-2019 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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@@ -299,7 +299,7 @@ int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
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BN_CTX *ctx)
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{
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point_conversion_form_t form;
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int y_bit;
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int y_bit, m;
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BN_CTX *new_ctx = NULL;
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BIGNUM *x, *y, *yxi;
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size_t field_len, enc_len;
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@@ -332,7 +332,8 @@ int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
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return EC_POINT_set_to_infinity(group, point);
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}
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field_len = (EC_GROUP_get_degree(group) + 7) / 8;
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m = EC_GROUP_get_degree(group);
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field_len = (m + 7) / 8;
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enc_len =
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(form ==
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POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2 * field_len;
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@@ -357,7 +358,7 @@ int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
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if (!BN_bin2bn(buf + 1, field_len, x))
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goto err;
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if (BN_ucmp(x, &group->field) >= 0) {
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if (BN_num_bits(x) > m) {
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ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
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goto err;
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}
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@@ -369,7 +370,7 @@ int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
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} else {
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if (!BN_bin2bn(buf + 1 + field_len, field_len, y))
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goto err;
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if (BN_ucmp(y, &group->field) >= 0) {
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if (BN_num_bits(y) > m) {
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ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
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goto err;
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}
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@@ -382,16 +383,14 @@ int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
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}
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}
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/*
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* EC_POINT_set_affine_coordinates_GF2m is responsible for checking that
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* the point is on the curve.
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*/
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if (!EC_POINT_set_affine_coordinates_GF2m(group, point, x, y, ctx))
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goto err;
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}
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/* test required by X9.62 */
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if (EC_POINT_is_on_curve(group, point, ctx) <= 0) {
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ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_POINT_IS_NOT_ON_CURVE);
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goto err;
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}
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ret = 1;
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err:
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