diff options
Diffstat (limited to 'drivers/crypto/caam/caampkc.c')
| -rw-r--r-- | drivers/crypto/caam/caampkc.c | 71 |
1 files changed, 59 insertions, 12 deletions
diff --git a/drivers/crypto/caam/caampkc.c b/drivers/crypto/caam/caampkc.c index 7a897209f181..578ea63a3109 100644 --- a/drivers/crypto/caam/caampkc.c +++ b/drivers/crypto/caam/caampkc.c @@ -66,7 +66,7 @@ static void rsa_priv_f2_unmap(struct device *dev, struct rsa_edesc *edesc, struct caam_rsa_key *key = &ctx->key; struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2; size_t p_sz = key->p_sz; - size_t q_sz = key->p_sz; + size_t q_sz = key->q_sz; dma_unmap_single(dev, pdb->d_dma, key->d_sz, DMA_TO_DEVICE); dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE); @@ -83,7 +83,7 @@ static void rsa_priv_f3_unmap(struct device *dev, struct rsa_edesc *edesc, struct caam_rsa_key *key = &ctx->key; struct rsa_priv_f3_pdb *pdb = &edesc->pdb.priv_f3; size_t p_sz = key->p_sz; - size_t q_sz = key->p_sz; + size_t q_sz = key->q_sz; dma_unmap_single(dev, pdb->p_dma, p_sz, DMA_TO_DEVICE); dma_unmap_single(dev, pdb->q_dma, q_sz, DMA_TO_DEVICE); @@ -166,18 +166,71 @@ static void rsa_priv_f3_done(struct device *dev, u32 *desc, u32 err, akcipher_request_complete(req, err); } +static int caam_rsa_count_leading_zeros(struct scatterlist *sgl, + unsigned int nbytes, + unsigned int flags) +{ + struct sg_mapping_iter miter; + int lzeros, ents; + unsigned int len; + unsigned int tbytes = nbytes; + const u8 *buff; + + ents = sg_nents_for_len(sgl, nbytes); + if (ents < 0) + return ents; + + sg_miter_start(&miter, sgl, ents, SG_MITER_FROM_SG | flags); + + lzeros = 0; + len = 0; + while (nbytes > 0) { + while (len && !*buff) { + lzeros++; + len--; + buff++; + } + + if (len && *buff) + break; + + sg_miter_next(&miter); + buff = miter.addr; + len = miter.length; + + nbytes -= lzeros; + lzeros = 0; + } + + miter.consumed = lzeros; + sg_miter_stop(&miter); + nbytes -= lzeros; + + return tbytes - nbytes; +} + static struct rsa_edesc *rsa_edesc_alloc(struct akcipher_request *req, size_t desclen) { struct crypto_akcipher *tfm = crypto_akcipher_reqtfm(req); struct caam_rsa_ctx *ctx = akcipher_tfm_ctx(tfm); struct device *dev = ctx->dev; + struct caam_rsa_req_ctx *req_ctx = akcipher_request_ctx(req); struct rsa_edesc *edesc; gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? GFP_KERNEL : GFP_ATOMIC; + int sg_flags = (flags == GFP_ATOMIC) ? SG_MITER_ATOMIC : 0; int sgc; int sec4_sg_index, sec4_sg_len = 0, sec4_sg_bytes; int src_nents, dst_nents; + int lzeros; + + lzeros = caam_rsa_count_leading_zeros(req->src, req->src_len, sg_flags); + if (lzeros < 0) + return ERR_PTR(lzeros); + + req->src_len -= lzeros; + req->src = scatterwalk_ffwd(req_ctx->src, req->src, lzeros); src_nents = sg_nents_for_len(req->src, req->src_len); dst_nents = sg_nents_for_len(req->dst, req->dst_len); @@ -344,7 +397,7 @@ static int set_rsa_priv_f2_pdb(struct akcipher_request *req, struct rsa_priv_f2_pdb *pdb = &edesc->pdb.priv_f2; int sec4_sg_index = 0; size_t p_sz = key->p_sz; - size_t q_sz = key->p_sz; + size_t q_sz = key->q_sz; pdb->d_dma = dma_map_single(dev, key->d, key->d_sz, DMA_TO_DEVICE); if (dma_mapping_error(dev, pdb->d_dma)) { @@ -419,7 +472,7 @@ static int set_rsa_priv_f3_pdb(struct akcipher_request *req, struct rsa_priv_f3_pdb *pdb = &edesc->pdb.priv_f3; int sec4_sg_index = 0; size_t p_sz = key->p_sz; - size_t q_sz = key->p_sz; + size_t q_sz = key->q_sz; pdb->p_dma = dma_map_single(dev, key->p, p_sz, DMA_TO_DEVICE); if (dma_mapping_error(dev, pdb->p_dma)) { @@ -730,19 +783,12 @@ static u8 *caam_read_rsa_crt(const u8 *ptr, size_t nbytes, size_t dstlen) */ static inline u8 *caam_read_raw_data(const u8 *buf, size_t *nbytes) { - u8 *val; caam_rsa_drop_leading_zeros(&buf, nbytes); if (!*nbytes) return NULL; - val = kzalloc(*nbytes, GFP_DMA | GFP_KERNEL); - if (!val) - return NULL; - - memcpy(val, buf, *nbytes); - - return val; + return kmemdup(buf, *nbytes, GFP_DMA | GFP_KERNEL); } static int caam_rsa_check_key_length(unsigned int len) @@ -953,6 +999,7 @@ static struct akcipher_alg caam_rsa = { .max_size = caam_rsa_max_size, .init = caam_rsa_init_tfm, .exit = caam_rsa_exit_tfm, + .reqsize = sizeof(struct caam_rsa_req_ctx), .base = { .cra_name = "rsa", .cra_driver_name = "rsa-caam", |