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crypto: hisilicon/hpre - register ecdh NIST P384

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Register ecdh NIST P384 curve and add the tfm initialization.

Signed-off-by: Hui Tang <tanghui20@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Hui Tang 2021-05-29 16:58:47 +08:00 committed by Herbert Xu
parent 9612581fc1
commit b981f7990e
1 changed files with 52 additions and 4 deletions
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56
drivers/crypto/hisilicon/hpre/hpre_crypto.c
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@ -45,9 +45,11 @@ struct hpre_ctx;
/* size in bytes of the n prime */
#define HPRE_ECC_NIST_P192_N_SIZE 24
#define HPRE_ECC_NIST_P256_N_SIZE 32
#define HPRE_ECC_NIST_P384_N_SIZE 48
/* size in bytes */
#define HPRE_ECC_HW256_KSZ_B 32
#define HPRE_ECC_HW384_KSZ_B 48
typedef void (*hpre_cb)(struct hpre_ctx *ctx, void *sqe);
@ -1211,12 +1213,21 @@ static void hpre_ecc_clear_ctx(struct hpre_ctx *ctx, bool is_clear_all,
hpre_ctx_clear(ctx, is_clear_all);
}
/*
* The bits of 192/224/256/384/521 are supported by HPRE,
* and convert the bits like:
* bits<=256, bits=256; 256<bits<=384, bits=384; 384<bits<=576, bits=576;
* If the parameter bit width is insufficient, then we fill in the
* high-order zeros by soft, so TASK_LENGTH1 is 0x3/0x5/0x8;
*/
static unsigned int hpre_ecdh_supported_curve(unsigned short id)
{
switch (id) {
case ECC_CURVE_NIST_P192:
case ECC_CURVE_NIST_P256:
return HPRE_ECC_HW256_KSZ_B;
case ECC_CURVE_NIST_P384:
return HPRE_ECC_HW384_KSZ_B;
default:
break;
}
@ -1281,6 +1292,8 @@ static unsigned int hpre_ecdh_get_curvesz(unsigned short id)
return HPRE_ECC_NIST_P192_N_SIZE;
case ECC_CURVE_NIST_P256:
return HPRE_ECC_NIST_P256_N_SIZE;
case ECC_CURVE_NIST_P384:
return HPRE_ECC_NIST_P384_N_SIZE;
default:
break;
}
@ -1613,6 +1626,15 @@ static int hpre_ecdh_nist_p256_init_tfm(struct crypto_kpp *tfm)
return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE);
}
static int hpre_ecdh_nist_p384_init_tfm(struct crypto_kpp *tfm)
{
struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
ctx->curve_id = ECC_CURVE_NIST_P384;
return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE);
}
static void hpre_ecdh_exit_tfm(struct crypto_kpp *tfm)
{
struct hpre_ctx *ctx = kpp_tfm_ctx(tfm);
@ -2017,6 +2039,23 @@ static struct kpp_alg ecdh_nist_p256 = {
},
};
static struct kpp_alg ecdh_nist_p384 = {
.set_secret = hpre_ecdh_set_secret,
.generate_public_key = hpre_ecdh_compute_value,
.compute_shared_secret = hpre_ecdh_compute_value,
.max_size = hpre_ecdh_max_size,
.init = hpre_ecdh_nist_p384_init_tfm,
.exit = hpre_ecdh_exit_tfm,
.reqsize = sizeof(struct hpre_asym_request) + HPRE_ALIGN_SZ,
.base = {
.cra_ctxsize = sizeof(struct hpre_ctx),
.cra_priority = HPRE_CRYPTO_ALG_PRI,
.cra_name = "ecdh-nist-p384",
.cra_driver_name = "hpre-ecdh-nist-p384",
.cra_module = THIS_MODULE,
},
};
static struct kpp_alg curve25519_alg = {
.set_secret = hpre_curve25519_set_secret,
.generate_public_key = hpre_curve25519_compute_value,
@ -2044,16 +2083,25 @@ static int hpre_register_ecdh(void)
return ret;
ret = crypto_register_kpp(&ecdh_nist_p256);
if (ret) {
crypto_unregister_kpp(&ecdh_nist_p192);
return ret;
}
if (ret)
goto unregister_ecdh_p192;
ret = crypto_register_kpp(&ecdh_nist_p384);
if (ret)
goto unregister_ecdh_p256;
return 0;
unregister_ecdh_p256:
crypto_unregister_kpp(&ecdh_nist_p256);
unregister_ecdh_p192:
crypto_unregister_kpp(&ecdh_nist_p192);
return ret;
}
static void hpre_unregister_ecdh(void)
{
crypto_unregister_kpp(&ecdh_nist_p384);
crypto_unregister_kpp(&ecdh_nist_p256);
crypto_unregister_kpp(&ecdh_nist_p192);
}