diff options
Diffstat (limited to 'drivers/crypto/hisilicon/hpre/hpre_crypto.c')
| -rw-r--r-- | drivers/crypto/hisilicon/hpre/hpre_crypto.c | 921 |
1 files changed, 894 insertions, 27 deletions
diff --git a/drivers/crypto/hisilicon/hpre/hpre_crypto.c b/drivers/crypto/hisilicon/hpre/hpre_crypto.c index a87f9904087a..a380087c83f7 100644 --- a/drivers/crypto/hisilicon/hpre/hpre_crypto.c +++ b/drivers/crypto/hisilicon/hpre/hpre_crypto.c @@ -1,7 +1,10 @@ // SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2019 HiSilicon Limited. */ #include <crypto/akcipher.h> +#include <crypto/curve25519.h> #include <crypto/dh.h> +#include <crypto/ecc_curve.h> +#include <crypto/ecdh.h> #include <crypto/internal/akcipher.h> #include <crypto/internal/kpp.h> #include <crypto/internal/rsa.h> @@ -36,6 +39,13 @@ struct hpre_ctx; #define HPRE_DFX_SEC_TO_US 1000000 #define HPRE_DFX_US_TO_NS 1000 +/* size in bytes of the n prime */ +#define HPRE_ECC_NIST_P192_N_SIZE 24 +#define HPRE_ECC_NIST_P256_N_SIZE 32 + +/* size in bytes */ +#define HPRE_ECC_HW256_KSZ_B 32 + typedef void (*hpre_cb)(struct hpre_ctx *ctx, void *sqe); struct hpre_rsa_ctx { @@ -61,14 +71,35 @@ struct hpre_dh_ctx { * else if base if the counterpart public key we * compute the shared secret * ZZ = yb^xa mod p; [RFC2631 sec 2.1.1] + * low address: d--->n, please refer to Hisilicon HPRE UM */ - char *xa_p; /* low address: d--->n, please refer to Hisilicon HPRE UM */ + char *xa_p; dma_addr_t dma_xa_p; char *g; /* m */ dma_addr_t dma_g; }; +struct hpre_ecdh_ctx { + /* low address: p->a->k->b */ + unsigned char *p; + dma_addr_t dma_p; + + /* low address: x->y */ + unsigned char *g; + dma_addr_t dma_g; +}; + +struct hpre_curve25519_ctx { + /* low address: p->a->k */ + unsigned char *p; + dma_addr_t dma_p; + + /* gx coordinate */ + unsigned char *g; + dma_addr_t dma_g; +}; + struct hpre_ctx { struct hisi_qp *qp; struct hpre_asym_request **req_list; @@ -80,7 +111,11 @@ struct hpre_ctx { union { struct hpre_rsa_ctx rsa; struct hpre_dh_ctx dh; + struct hpre_ecdh_ctx ecdh; + struct hpre_curve25519_ctx curve25519; }; + /* for ecc algorithms */ + unsigned int curve_id; }; struct hpre_asym_request { @@ -91,6 +126,8 @@ struct hpre_asym_request { union { struct akcipher_request *rsa; struct kpp_request *dh; + struct kpp_request *ecdh; + struct kpp_request *curve25519; } areq; int err; int req_id; @@ -152,12 +189,12 @@ static void hpre_rm_req_from_ctx(struct hpre_asym_request *hpre_req) } } -static struct hisi_qp *hpre_get_qp_and_start(void) +static struct hisi_qp *hpre_get_qp_and_start(u8 type) { struct hisi_qp *qp; int ret; - qp = hpre_create_qp(); + qp = hpre_create_qp(type); if (!qp) { pr_err("Can not create hpre qp!\n"); return ERR_PTR(-ENODEV); @@ -261,8 +298,6 @@ static void hpre_hw_data_clr_all(struct hpre_ctx *ctx, dma_addr_t tmp; tmp = le64_to_cpu(sqe->in); - if (unlikely(!tmp)) - return; if (src) { if (req->src) @@ -272,8 +307,6 @@ static void hpre_hw_data_clr_all(struct hpre_ctx *ctx, } tmp = le64_to_cpu(sqe->out); - if (unlikely(!tmp)) - return; if (req->dst) { if (dst) @@ -288,13 +321,16 @@ static void hpre_hw_data_clr_all(struct hpre_ctx *ctx, static int hpre_alg_res_post_hf(struct hpre_ctx *ctx, struct hpre_sqe *sqe, void **kreq) { + struct device *dev = HPRE_DEV(ctx); struct hpre_asym_request *req; - int err, id, done; + unsigned int err, done, alg; + int id; #define HPRE_NO_HW_ERR 0 #define HPRE_HW_TASK_DONE 3 #define HREE_HW_ERR_MASK 0x7ff #define HREE_SQE_DONE_MASK 0x3 +#define HREE_ALG_TYPE_MASK 0x1f id = (int)le16_to_cpu(sqe->tag); req = ctx->req_list[id]; hpre_rm_req_from_ctx(req); @@ -307,7 +343,11 @@ static int hpre_alg_res_post_hf(struct hpre_ctx *ctx, struct hpre_sqe *sqe, HREE_SQE_DONE_MASK; if (likely(err == HPRE_NO_HW_ERR && done == HPRE_HW_TASK_DONE)) - return 0; + return 0; + + alg = le32_to_cpu(sqe->dw0) & HREE_ALG_TYPE_MASK; + dev_err_ratelimited(dev, "alg[0x%x] error: done[0x%x], etype[0x%x]\n", + alg, done, err); return -EINVAL; } @@ -413,7 +453,6 @@ static void hpre_alg_cb(struct hisi_qp *qp, void *resp) struct hpre_sqe *sqe = resp; struct hpre_asym_request *req = ctx->req_list[le16_to_cpu(sqe->tag)]; - if (unlikely(!req)) { atomic64_inc(&dfx[HPRE_INVALID_REQ_CNT].value); return; @@ -422,18 +461,29 @@ static void hpre_alg_cb(struct hisi_qp *qp, void *resp) req->cb(ctx, resp); } -static int hpre_ctx_init(struct hpre_ctx *ctx) +static void hpre_stop_qp_and_put(struct hisi_qp *qp) +{ + hisi_qm_stop_qp(qp); + hisi_qm_free_qps(&qp, 1); +} + +static int hpre_ctx_init(struct hpre_ctx *ctx, u8 type) { struct hisi_qp *qp; + int ret; - qp = hpre_get_qp_and_start(); + qp = hpre_get_qp_and_start(type); if (IS_ERR(qp)) return PTR_ERR(qp); qp->qp_ctx = ctx; qp->req_cb = hpre_alg_cb; - return hpre_ctx_set(ctx, qp, QM_Q_DEPTH); + ret = hpre_ctx_set(ctx, qp, QM_Q_DEPTH); + if (ret) + hpre_stop_qp_and_put(qp); + + return ret; } static int hpre_msg_request_set(struct hpre_ctx *ctx, void *req, bool is_rsa) @@ -510,7 +560,6 @@ static int hpre_send(struct hpre_ctx *ctx, struct hpre_sqe *msg) return ret; } -#ifdef CONFIG_CRYPTO_DH static int hpre_dh_compute_value(struct kpp_request *req) { struct crypto_kpp *tfm = crypto_kpp_reqtfm(req); @@ -674,7 +723,7 @@ static int hpre_dh_init_tfm(struct crypto_kpp *tfm) { struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); - return hpre_ctx_init(ctx); + return hpre_ctx_init(ctx, HPRE_V2_ALG_TYPE); } static void hpre_dh_exit_tfm(struct crypto_kpp *tfm) @@ -683,7 +732,6 @@ static void hpre_dh_exit_tfm(struct crypto_kpp *tfm) hpre_dh_clear_ctx(ctx, true); } -#endif static void hpre_rsa_drop_leading_zeros(const char **ptr, size_t *len) { @@ -1100,7 +1148,7 @@ static int hpre_rsa_init_tfm(struct crypto_akcipher *tfm) return PTR_ERR(ctx->rsa.soft_tfm); } - ret = hpre_ctx_init(ctx); + ret = hpre_ctx_init(ctx, HPRE_V2_ALG_TYPE); if (ret) crypto_free_akcipher(ctx->rsa.soft_tfm); @@ -1115,6 +1163,734 @@ static void hpre_rsa_exit_tfm(struct crypto_akcipher *tfm) crypto_free_akcipher(ctx->rsa.soft_tfm); } +static void hpre_key_to_big_end(u8 *data, int len) +{ + int i, j; + u8 tmp; + + for (i = 0; i < len / 2; i++) { + j = len - i - 1; + tmp = data[j]; + data[j] = data[i]; + data[i] = tmp; + } +} + +static void hpre_ecc_clear_ctx(struct hpre_ctx *ctx, bool is_clear_all, + bool is_ecdh) +{ + struct device *dev = HPRE_DEV(ctx); + unsigned int sz = ctx->key_sz; + unsigned int shift = sz << 1; + + if (is_clear_all) + hisi_qm_stop_qp(ctx->qp); + + if (is_ecdh && ctx->ecdh.p) { + /* ecdh: p->a->k->b */ + memzero_explicit(ctx->ecdh.p + shift, sz); + dma_free_coherent(dev, sz << 3, ctx->ecdh.p, ctx->ecdh.dma_p); + ctx->ecdh.p = NULL; + } else if (!is_ecdh && ctx->curve25519.p) { + /* curve25519: p->a->k */ + memzero_explicit(ctx->curve25519.p + shift, sz); + dma_free_coherent(dev, sz << 2, ctx->curve25519.p, + ctx->curve25519.dma_p); + ctx->curve25519.p = NULL; + } + + hpre_ctx_clear(ctx, is_clear_all); +} + +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; + default: + break; + } + + return 0; +} + +static void fill_curve_param(void *addr, u64 *param, unsigned int cur_sz, u8 ndigits) +{ + unsigned int sz = cur_sz - (ndigits - 1) * sizeof(u64); + u8 i = 0; + + while (i < ndigits - 1) { + memcpy(addr + sizeof(u64) * i, ¶m[i], sizeof(u64)); + i++; + } + + memcpy(addr + sizeof(u64) * i, ¶m[ndigits - 1], sz); + hpre_key_to_big_end((u8 *)addr, cur_sz); +} + +static int hpre_ecdh_fill_curve(struct hpre_ctx *ctx, struct ecdh *params, + unsigned int cur_sz) +{ + unsigned int shifta = ctx->key_sz << 1; + unsigned int shiftb = ctx->key_sz << 2; + void *p = ctx->ecdh.p + ctx->key_sz - cur_sz; + void *a = ctx->ecdh.p + shifta - cur_sz; + void *b = ctx->ecdh.p + shiftb - cur_sz; + void *x = ctx->ecdh.g + ctx->key_sz - cur_sz; + void *y = ctx->ecdh.g + shifta - cur_sz; + const struct ecc_curve *curve = ecc_get_curve(ctx->curve_id); + char *n; + + if (unlikely(!curve)) + return -EINVAL; + + n = kzalloc(ctx->key_sz, GFP_KERNEL); + if (!n) + return -ENOMEM; + + fill_curve_param(p, curve->p, cur_sz, curve->g.ndigits); + fill_curve_param(a, curve->a, cur_sz, curve->g.ndigits); + fill_curve_param(b, curve->b, cur_sz, curve->g.ndigits); + fill_curve_param(x, curve->g.x, cur_sz, curve->g.ndigits); + fill_curve_param(y, curve->g.y, cur_sz, curve->g.ndigits); + fill_curve_param(n, curve->n, cur_sz, curve->g.ndigits); + + if (params->key_size == cur_sz && memcmp(params->key, n, cur_sz) >= 0) { + kfree(n); + return -EINVAL; + } + + kfree(n); + return 0; +} + +static unsigned int hpre_ecdh_get_curvesz(unsigned short id) +{ + switch (id) { + case ECC_CURVE_NIST_P192: + return HPRE_ECC_NIST_P192_N_SIZE; + case ECC_CURVE_NIST_P256: + return HPRE_ECC_NIST_P256_N_SIZE; + default: + break; + } + + return 0; +} + +static int hpre_ecdh_set_param(struct hpre_ctx *ctx, struct ecdh *params) +{ + struct device *dev = HPRE_DEV(ctx); + unsigned int sz, shift, curve_sz; + int ret; + + ctx->key_sz = hpre_ecdh_supported_curve(ctx->curve_id); + if (!ctx->key_sz) + return -EINVAL; + + curve_sz = hpre_ecdh_get_curvesz(ctx->curve_id); + if (!curve_sz || params->key_size > curve_sz) + return -EINVAL; + + sz = ctx->key_sz; + + if (!ctx->ecdh.p) { + ctx->ecdh.p = dma_alloc_coherent(dev, sz << 3, &ctx->ecdh.dma_p, + GFP_KERNEL); + if (!ctx->ecdh.p) + return -ENOMEM; + } + + shift = sz << 2; + ctx->ecdh.g = ctx->ecdh.p + shift; + ctx->ecdh.dma_g = ctx->ecdh.dma_p + shift; + + ret = hpre_ecdh_fill_curve(ctx, params, curve_sz); + if (ret) { + dev_err(dev, "failed to fill curve_param, ret = %d!\n", ret); + dma_free_coherent(dev, sz << 3, ctx->ecdh.p, ctx->ecdh.dma_p); + ctx->ecdh.p = NULL; + return ret; + } + + return 0; +} + +static bool hpre_key_is_zero(char *key, unsigned short key_sz) +{ + int i; + + for (i = 0; i < key_sz; i++) + if (key[i]) + return false; + + return true; +} + +static int hpre_ecdh_set_secret(struct crypto_kpp *tfm, const void *buf, + unsigned int len) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + struct device *dev = HPRE_DEV(ctx); + unsigned int sz, sz_shift; + struct ecdh params; + int ret; + + if (crypto_ecdh_decode_key(buf, len, ¶ms) < 0) { + dev_err(dev, "failed to decode ecdh key!\n"); + return -EINVAL; + } + + if (hpre_key_is_zero(params.key, params.key_size)) { + dev_err(dev, "Invalid hpre key!\n"); + return -EINVAL; + } + + hpre_ecc_clear_ctx(ctx, false, true); + + ret = hpre_ecdh_set_param(ctx, ¶ms); + if (ret < 0) { + dev_err(dev, "failed to set hpre param, ret = %d!\n", ret); + return ret; + } + + sz = ctx->key_sz; + sz_shift = (sz << 1) + sz - params.key_size; + memcpy(ctx->ecdh.p + sz_shift, params.key, params.key_size); + + return 0; +} + +static void hpre_ecdh_hw_data_clr_all(struct hpre_ctx *ctx, + struct hpre_asym_request *req, + struct scatterlist *dst, + struct scatterlist *src) +{ + struct device *dev = HPRE_DEV(ctx); + struct hpre_sqe *sqe = &req->req; + dma_addr_t dma; + + dma = le64_to_cpu(sqe->in); + + if (src && req->src) + dma_free_coherent(dev, ctx->key_sz << 2, req->src, dma); + + dma = le64_to_cpu(sqe->out); + + if (req->dst) + dma_free_coherent(dev, ctx->key_sz << 1, req->dst, dma); + if (dst) + dma_unmap_single(dev, dma, ctx->key_sz << 1, DMA_FROM_DEVICE); +} + +static void hpre_ecdh_cb(struct hpre_ctx *ctx, void *resp) +{ + unsigned int curve_sz = hpre_ecdh_get_curvesz(ctx->curve_id); + struct hpre_dfx *dfx = ctx->hpre->debug.dfx; + struct hpre_asym_request *req = NULL; + struct kpp_request *areq; + u64 overtime_thrhld; + char *p; + int ret; + + ret = hpre_alg_res_post_hf(ctx, resp, (void **)&req); + areq = req->areq.ecdh; + areq->dst_len = ctx->key_sz << 1; + + overtime_thrhld = atomic64_read(&dfx[HPRE_OVERTIME_THRHLD].value); + if (overtime_thrhld && hpre_is_bd_timeout(req, overtime_thrhld)) + atomic64_inc(&dfx[HPRE_OVER_THRHLD_CNT].value); + + p = sg_virt(areq->dst); + memmove(p, p + ctx->key_sz - curve_sz, curve_sz); + memmove(p + curve_sz, p + areq->dst_len - curve_sz, curve_sz); + + hpre_ecdh_hw_data_clr_all(ctx, req, areq->dst, areq->src); + kpp_request_complete(areq, ret); + + atomic64_inc(&dfx[HPRE_RECV_CNT].value); +} + +static int hpre_ecdh_msg_request_set(struct hpre_ctx *ctx, + struct kpp_request *req) +{ + struct hpre_asym_request *h_req; + struct hpre_sqe *msg; + int req_id; + void *tmp; + + if (req->dst_len < ctx->key_sz << 1) { + req->dst_len = ctx->key_sz << 1; + return -EINVAL; + } + + tmp = kpp_request_ctx(req); + h_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ); + h_req->cb = hpre_ecdh_cb; + h_req->areq.ecdh = req; + msg = &h_req->req; + memset(msg, 0, sizeof(*msg)); + msg->key = cpu_to_le64(ctx->ecdh.dma_p); + + msg->dw0 |= cpu_to_le32(0x1U << HPRE_SQE_DONE_SHIFT); + msg->task_len1 = (ctx->key_sz >> HPRE_BITS_2_BYTES_SHIFT) - 1; + h_req->ctx = ctx; + + req_id = hpre_add_req_to_ctx(h_req); + if (req_id < 0) + return -EBUSY; + + msg->tag = cpu_to_le16((u16)req_id); + return 0; +} + +static int hpre_ecdh_src_data_init(struct hpre_asym_request *hpre_req, + struct scatterlist *data, unsigned int len) +{ + struct hpre_sqe *msg = &hpre_req->req; + struct hpre_ctx *ctx = hpre_req->ctx; + struct device *dev = HPRE_DEV(ctx); + unsigned int tmpshift; + dma_addr_t dma = 0; + void *ptr; + int shift; + + /* Src_data include gx and gy. */ + shift = ctx->key_sz - (len >> 1); + if (unlikely(shift < 0)) + return -EINVAL; + + ptr = dma_alloc_coherent(dev, ctx->key_sz << 2, &dma, GFP_KERNEL); + if (unlikely(!ptr)) + return -ENOMEM; + + tmpshift = ctx->key_sz << 1; + scatterwalk_map_and_copy(ptr + tmpshift, data, 0, len, 0); + memcpy(ptr + shift, ptr + tmpshift, len >> 1); + memcpy(ptr + ctx->key_sz + shift, ptr + tmpshift + (len >> 1), len >> 1); + + hpre_req->src = ptr; + msg->in = cpu_to_le64(dma); + return 0; +} + +static int hpre_ecdh_dst_data_init(struct hpre_asym_request *hpre_req, + struct scatterlist *data, unsigned int len) +{ + struct hpre_sqe *msg = &hpre_req->req; + struct hpre_ctx *ctx = hpre_req->ctx; + struct device *dev = HPRE_DEV(ctx); + dma_addr_t dma = 0; + + if (unlikely(!data || !sg_is_last(data) || len != ctx->key_sz << 1)) { + dev_err(dev, "data or data length is illegal!\n"); + return -EINVAL; + } + + hpre_req->dst = NULL; + dma = dma_map_single(dev, sg_virt(data), len, DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(dev, dma))) { + dev_err(dev, "dma map data err!\n"); + return -ENOMEM; + } + + msg->out = cpu_to_le64(dma); + return 0; +} + +static int hpre_ecdh_compute_value(struct kpp_request *req) +{ + struct crypto_kpp *tfm = crypto_kpp_reqtfm(req); + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + struct device *dev = HPRE_DEV(ctx); + void *tmp = kpp_request_ctx(req); + struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ); + struct hpre_sqe *msg = &hpre_req->req; + int ret; + + ret = hpre_ecdh_msg_request_set(ctx, req); + if (unlikely(ret)) { + dev_err(dev, "failed to set ecdh request, ret = %d!\n", ret); + return ret; + } + + if (req->src) { + ret = hpre_ecdh_src_data_init(hpre_req, req->src, req->src_len); + if (unlikely(ret)) { + dev_err(dev, "failed to init src data, ret = %d!\n", ret); + goto clear_all; + } + } else { + msg->in = cpu_to_le64(ctx->ecdh.dma_g); + } + + ret = hpre_ecdh_dst_data_init(hpre_req, req->dst, req->dst_len); + if (unlikely(ret)) { + dev_err(dev, "failed to init dst data, ret = %d!\n", ret); + goto clear_all; + } + + msg->dw0 = cpu_to_le32(le32_to_cpu(msg->dw0) | HPRE_ALG_ECC_MUL); + ret = hpre_send(ctx, msg); + if (likely(!ret)) + return -EINPROGRESS; + +clear_all: + hpre_rm_req_from_ctx(hpre_req); + hpre_ecdh_hw_data_clr_all(ctx, hpre_req, req->dst, req->src); + return ret; +} + +static unsigned int hpre_ecdh_max_size(struct crypto_kpp *tfm) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + + /* max size is the pub_key_size, include x and y */ + return ctx->key_sz << 1; +} + +static int hpre_ecdh_nist_p192_init_tfm(struct crypto_kpp *tfm) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + + ctx->curve_id = ECC_CURVE_NIST_P192; + + return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE); +} + +static int hpre_ecdh_nist_p256_init_tfm(struct crypto_kpp *tfm) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + + ctx->curve_id = ECC_CURVE_NIST_P256; + + 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); + + hpre_ecc_clear_ctx(ctx, true, true); +} + +static void hpre_curve25519_fill_curve(struct hpre_ctx *ctx, const void *buf, + unsigned int len) +{ + u8 secret[CURVE25519_KEY_SIZE] = { 0 }; + unsigned int sz = ctx->key_sz; + const struct ecc_curve *curve; + unsigned int shift = sz << 1; + void *p; + + /* + * The key from 'buf' is in little-endian, we should preprocess it as + * the description in rfc7748: "k[0] &= 248, k[31] &= 127, k[31] |= 64", + * then convert it to big endian. Only in this way, the result can be + * the same as the software curve-25519 that exists in crypto. + */ + memcpy(secret, buf, len); + curve25519_clamp_secret(secret); + hpre_key_to_big_end(secret, CURVE25519_KEY_SIZE); + + p = ctx->curve25519.p + sz - len; + + curve = ecc_get_curve25519(); + + /* fill curve parameters */ + fill_curve_param(p, curve->p, len, curve->g.ndigits); + fill_curve_param(p + sz, curve->a, len, curve->g.ndigits); + memcpy(p + shift, secret, len); + fill_curve_param(p + shift + sz, curve->g.x, len, curve->g.ndigits); + memzero_explicit(secret, CURVE25519_KEY_SIZE); +} + +static int hpre_curve25519_set_param(struct hpre_ctx *ctx, const void *buf, + unsigned int len) +{ + struct device *dev = HPRE_DEV(ctx); + unsigned int sz = ctx->key_sz; + unsigned int shift = sz << 1; + + /* p->a->k->gx */ + if (!ctx->curve25519.p) { + ctx->curve25519.p = dma_alloc_coherent(dev, sz << 2, + &ctx->curve25519.dma_p, + GFP_KERNEL); + if (!ctx->curve25519.p) + return -ENOMEM; + } + + ctx->curve25519.g = ctx->curve25519.p + shift + sz; + ctx->curve25519.dma_g = ctx->curve25519.dma_p + shift + sz; + + hpre_curve25519_fill_curve(ctx, buf, len); + + return 0; +} + +static int hpre_curve25519_set_secret(struct crypto_kpp *tfm, const void *buf, + unsigned int len) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + struct device *dev = HPRE_DEV(ctx); + int ret = -EINVAL; + + if (len != CURVE25519_KEY_SIZE || + !crypto_memneq(buf, curve25519_null_point, CURVE25519_KEY_SIZE)) { + dev_err(dev, "key is null or key len is not 32bytes!\n"); + return ret; + } + + /* Free old secret if any */ + hpre_ecc_clear_ctx(ctx, false, false); + + ctx->key_sz = CURVE25519_KEY_SIZE; + ret = hpre_curve25519_set_param(ctx, buf, CURVE25519_KEY_SIZE); + if (ret) { + dev_err(dev, "failed to set curve25519 param, ret = %d!\n", ret); + hpre_ecc_clear_ctx(ctx, false, false); + return ret; + } + + return 0; +} + +static void hpre_curve25519_hw_data_clr_all(struct hpre_ctx *ctx, + struct hpre_asym_request *req, + struct scatterlist *dst, + struct scatterlist *src) +{ + struct device *dev = HPRE_DEV(ctx); + struct hpre_sqe *sqe = &req->req; + dma_addr_t dma; + + dma = le64_to_cpu(sqe->in); + + if (src && req->src) + dma_free_coherent(dev, ctx->key_sz, req->src, dma); + + dma = le64_to_cpu(sqe->out); + + if (req->dst) + dma_free_coherent(dev, ctx->key_sz, req->dst, dma); + if (dst) + dma_unmap_single(dev, dma, ctx->key_sz, DMA_FROM_DEVICE); +} + +static void hpre_curve25519_cb(struct hpre_ctx *ctx, void *resp) +{ + struct hpre_dfx *dfx = ctx->hpre->debug.dfx; + struct hpre_asym_request *req = NULL; + struct kpp_request *areq; + u64 overtime_thrhld; + int ret; + + ret = hpre_alg_res_post_hf(ctx, resp, (void **)&req); + areq = req->areq.curve25519; + areq->dst_len = ctx->key_sz; + + overtime_thrhld = atomic64_read(&dfx[HPRE_OVERTIME_THRHLD].value); + if (overtime_thrhld && hpre_is_bd_timeout(req, overtime_thrhld)) + atomic64_inc(&dfx[HPRE_OVER_THRHLD_CNT].value); + + hpre_key_to_big_end(sg_virt(areq->dst), CURVE25519_KEY_SIZE); + + hpre_curve25519_hw_data_clr_all(ctx, req, areq->dst, areq->src); + kpp_request_complete(areq, ret); + + atomic64_inc(&dfx[HPRE_RECV_CNT].value); +} + +static int hpre_curve25519_msg_request_set(struct hpre_ctx *ctx, + struct kpp_request *req) +{ + struct hpre_asym_request *h_req; + struct hpre_sqe *msg; + int req_id; + void *tmp; + + if (unlikely(req->dst_len < ctx->key_sz)) { + req->dst_len = ctx->key_sz; + return -EINVAL; + } + + tmp = kpp_request_ctx(req); + h_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ); + h_req->cb = hpre_curve25519_cb; + h_req->areq.curve25519 = req; + msg = &h_req->req; + memset(msg, 0, sizeof(*msg)); + msg->key = cpu_to_le64(ctx->curve25519.dma_p); + + msg->dw0 |= cpu_to_le32(0x1U << HPRE_SQE_DONE_SHIFT); + msg->task_len1 = (ctx->key_sz >> HPRE_BITS_2_BYTES_SHIFT) - 1; + h_req->ctx = ctx; + + req_id = hpre_add_req_to_ctx(h_req); + if (req_id < 0) + return -EBUSY; + + msg->tag = cpu_to_le16((u16)req_id); + return 0; +} + +static void hpre_curve25519_src_modulo_p(u8 *ptr) +{ + int i; + + for (i = 0; i < CURVE25519_KEY_SIZE - 1; i++) + ptr[i] = 0; + + /* The modulus is ptr's last byte minus '0xed'(last byte of p) */ + ptr[i] -= 0xed; +} + +static int hpre_curve25519_src_init(struct hpre_asym_request *hpre_req, + struct scatterlist *data, unsigned int len) +{ + struct hpre_sqe *msg = &hpre_req->req; + struct hpre_ctx *ctx = hpre_req->ctx; + struct device *dev = HPRE_DEV(ctx); + u8 p[CURVE25519_KEY_SIZE] = { 0 }; + const struct ecc_curve *curve; + dma_addr_t dma = 0; + u8 *ptr; + + if (len != CURVE25519_KEY_SIZE) { + dev_err(dev, "sourc_data len is not 32bytes, len = %u!\n", len); + return -EINVAL; + } + + ptr = dma_alloc_coherent(dev, ctx->key_sz, &dma, GFP_KERNEL); + if (unlikely(!ptr)) + return -ENOMEM; + + scatterwalk_map_and_copy(ptr, data, 0, len, 0); + + if (!crypto_memneq(ptr, curve25519_null_point, CURVE25519_KEY_SIZE)) { + dev_err(dev, "gx is null!\n"); + goto err; + } + + /* + * Src_data(gx) is in little-endian order, MSB in the final byte should + * be masked as described in RFC7748, then transform it to big-endian + * form, then hisi_hpre can use the data. + */ + ptr[31] &= 0x7f; + hpre_key_to_big_end(ptr, CURVE25519_KEY_SIZE); + + curve = ecc_get_curve25519(); + + fill_curve_param(p, curve->p, CURVE25519_KEY_SIZE, curve->g.ndigits); + + /* + * When src_data equals (2^255 - 19) ~ (2^255 - 1), it is out of p, + * we get its modulus to p, and then use it. + */ + if (memcmp(ptr, p, ctx->key_sz) >= 0) + hpre_curve25519_src_modulo_p(ptr); + + hpre_req->src = ptr; + msg->in = cpu_to_le64(dma); + return 0; + +err: + dma_free_coherent(dev, ctx->key_sz, ptr, dma); + return -EINVAL; +} + +static int hpre_curve25519_dst_init(struct hpre_asym_request *hpre_req, + struct scatterlist *data, unsigned int len) +{ + struct hpre_sqe *msg = &hpre_req->req; + struct hpre_ctx *ctx = hpre_req->ctx; + struct device *dev = HPRE_DEV(ctx); + dma_addr_t dma = 0; + + if (!data || !sg_is_last(data) || len != ctx->key_sz) { + dev_err(dev, "data or data length is illegal!\n"); + return -EINVAL; + } + + hpre_req->dst = NULL; + dma = dma_map_single(dev, sg_virt(data), len, DMA_FROM_DEVICE); + if (unlikely(dma_mapping_error(dev, dma))) { + dev_err(dev, "dma map data err!\n"); + return -ENOMEM; + } + + msg->out = cpu_to_le64(dma); + return 0; +} + +static int hpre_curve25519_compute_value(struct kpp_request *req) +{ + struct crypto_kpp *tfm = crypto_kpp_reqtfm(req); + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + struct device *dev = HPRE_DEV(ctx); + void *tmp = kpp_request_ctx(req); + struct hpre_asym_request *hpre_req = PTR_ALIGN(tmp, HPRE_ALIGN_SZ); + struct hpre_sqe *msg = &hpre_req->req; + int ret; + + ret = hpre_curve25519_msg_request_set(ctx, req); + if (unlikely(ret)) { + dev_err(dev, "failed to set curve25519 request, ret = %d!\n", ret); + return ret; + } + + if (req->src) { + ret = hpre_curve25519_src_init(hpre_req, req->src, req->src_len); + if (unlikely(ret)) { + dev_err(dev, "failed to init src data, ret = %d!\n", + ret); + goto clear_all; + } + } else { + msg->in = cpu_to_le64(ctx->curve25519.dma_g); + } + + ret = hpre_curve25519_dst_init(hpre_req, req->dst, req->dst_len); + if (unlikely(ret)) { + dev_err(dev, "failed to init dst data, ret = %d!\n", ret); + goto clear_all; + } + + msg->dw0 = cpu_to_le32(le32_to_cpu(msg->dw0) | HPRE_ALG_CURVE25519_MUL); + ret = hpre_send(ctx, msg); + if (likely(!ret)) + return -EINPROGRESS; + +clear_all: + hpre_rm_req_from_ctx(hpre_req); + hpre_curve25519_hw_data_clr_all(ctx, hpre_req, req->dst, req->src); + return ret; +} + +static unsigned int hpre_curve25519_max_size(struct crypto_kpp *tfm) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + + return ctx->key_sz; +} + +static int hpre_curve25519_init_tfm(struct crypto_kpp *tfm) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + + return hpre_ctx_init(ctx, HPRE_V3_ECC_ALG_TYPE); +} + +static void hpre_curve25519_exit_tfm(struct crypto_kpp *tfm) +{ + struct hpre_ctx *ctx = kpp_tfm_ctx(tfm); + + hpre_ecc_clear_ctx(ctx, true, false); +} + static struct akcipher_alg rsa = { .sign = hpre_rsa_dec, .verify = hpre_rsa_enc, @@ -1135,7 +1911,6 @@ static struct akcipher_alg rsa = { }, }; -#ifdef CONFIG_CRYPTO_DH static struct kpp_alg dh = { .set_secret = hpre_dh_set_secret, .generate_public_key = hpre_dh_compute_value, @@ -1152,9 +1927,83 @@ static struct kpp_alg dh = { .cra_module = THIS_MODULE, }, }; -#endif -int hpre_algs_register(void) +static struct kpp_alg ecdh_nist_p192 = { + .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_p192_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-p192", + .cra_driver_name = "hpre-ecdh", + .cra_module = THIS_MODULE, + }, +}; + +static struct kpp_alg ecdh_nist_p256 = { + .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_p256_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-p256", + .cra_driver_name = "hpre-ecdh", + .cra_module = THIS_MODULE, + }, +}; + +static struct kpp_alg curve25519_alg = { + .set_secret = hpre_curve25519_set_secret, + .generate_public_key = hpre_curve25519_compute_value, + .compute_shared_secret = hpre_curve25519_compute_value, + .max_size = hpre_curve25519_max_size, + .init = hpre_curve25519_init_tfm, + .exit = hpre_curve25519_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 = "curve25519", + .cra_driver_name = "hpre-curve25519", + .cra_module = THIS_MODULE, + }, +}; + + +static int hpre_register_ecdh(void) +{ + int ret; + + ret = crypto_register_kpp(&ecdh_nist_p192); + if (ret) + return ret; + + ret = crypto_register_kpp(&ecdh_nist_p256); + if (ret) { + crypto_unregister_kpp(&ecdh_nist_p192); + return ret; + } + + return 0; +} + +static void hpre_unregister_ecdh(void) +{ + crypto_unregister_kpp(&ecdh_nist_p256); + crypto_unregister_kpp(&ecdh_nist_p192); +} + +int hpre_algs_register(struct hisi_qm *qm) { int ret; @@ -1162,19 +2011,37 @@ int hpre_algs_register(void) ret = crypto_register_akcipher(&rsa); if (ret) return ret; -#ifdef CONFIG_CRYPTO_DH + ret = crypto_register_kpp(&dh); if (ret) - crypto_unregister_akcipher(&rsa); -#endif + goto unreg_rsa; + + if (qm->ver >= QM_HW_V3) { + ret = hpre_register_ecdh(); + if (ret) + goto unreg_dh; + ret = crypto_register_kpp(&curve25519_alg); + if (ret) + goto unreg_ecdh; + } + return 0; +unreg_ecdh: + hpre_unregister_ecdh(); +unreg_dh: + crypto_unregister_kpp(&dh); +unreg_rsa: + crypto_unregister_akcipher(&rsa); return ret; } -void hpre_algs_unregister(void) +void hpre_algs_unregister(struct hisi_qm *qm) { - crypto_unregister_akcipher(&rsa); -#ifdef CONFIG_CRYPTO_DH + if (qm->ver >= QM_HW_V3) { + crypto_unregister_kpp(&curve25519_alg); + hpre_unregister_ecdh(); + } + crypto_unregister_kpp(&dh); -#endif + crypto_unregister_akcipher(&rsa); } |