diff options
author | Meng Yu <yumeng18@huawei.com> | 2021-03-04 09:35:47 +0300 |
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committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-12 16:04:03 +0300 |
commit | 14bb76768275a056a91d249525a717019fd46663 (patch) | |
tree | a79d326c5fbe0c75a0c147bacb6a7805f25b3f4d /include/crypto | |
parent | 6763f5ea2d9ac9b5a34a374ee637b5e4f1f525dd (diff) | |
download | linux-14bb76768275a056a91d249525a717019fd46663.tar.xz |
crypto: ecc - expose ecc curves
Move 'ecc_get_curve' to 'include/crypto/ecc_curve.h', so everyone
in kernel tree can easily get ecc curve params;
Signed-off-by: Meng Yu <yumeng18@huawei.com>
Reviewed-by: Zaibo Xu <xuzaibo@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
-rw-r--r-- | include/crypto/ecc_curve.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/include/crypto/ecc_curve.h b/include/crypto/ecc_curve.h new file mode 100644 index 000000000000..19a35dae88a1 --- /dev/null +++ b/include/crypto/ecc_curve.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2021 HiSilicon */ + +#ifndef _CRYTO_ECC_CURVE_H +#define _CRYTO_ECC_CURVE_H + +#include <linux/types.h> + +/** + * struct ecc_point - elliptic curve point in affine coordinates + * + * @x: X coordinate in vli form. + * @y: Y coordinate in vli form. + * @ndigits: Length of vlis in u64 qwords. + */ +struct ecc_point { + u64 *x; + u64 *y; + u8 ndigits; +}; + +/** + * struct ecc_curve - definition of elliptic curve + * + * @name: Short name of the curve. + * @g: Generator point of the curve. + * @p: Prime number, if Barrett's reduction is used for this curve + * pre-calculated value 'mu' is appended to the @p after ndigits. + * Use of Barrett's reduction is heuristically determined in + * vli_mmod_fast(). + * @n: Order of the curve group. + * @a: Curve parameter a. + * @b: Curve parameter b. + */ +struct ecc_curve { + char *name; + struct ecc_point g; + u64 *p; + u64 *n; + u64 *a; + u64 *b; +}; + +/** + * ecc_get_curve() - get elliptic curve; + * @curve_id: Curves IDs: + * defined in 'include/crypto/ecdh.h'; + * + * Returns curve if get curve succssful, NULL otherwise + */ +const struct ecc_curve *ecc_get_curve(unsigned int curve_id); + +#endif |