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crypto: talitos - Add ablkcipher algorithms
Add these ablkcipher algorithms: cbc(aes), cbc(des3_ede). Added handling of chained scatterlists with zero length entry because eseqiv uses it. Added new map and unmap routines. Signed-off-by: Lee Nipper <lee.nipper@gmail.com> Signed-off-by: Kim Phillips <kim.phillips@freescale.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Lee Nipper
Herbert Xu
parent
56af8cd44b
commit
4de9d0b547
1 changed files with 342 additions and 38 deletions
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@ -44,6 +44,8 @@
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#include <crypto/sha.h>
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#include <crypto/aead.h>
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#include <crypto/authenc.h>
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#include <crypto/skcipher.h>
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#include <crypto/scatterwalk.h>
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#include "talitos.h"
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@ -755,12 +757,62 @@ badkey:
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struct talitos_edesc {
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int src_nents;
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int dst_nents;
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int src_is_chained;
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int dst_is_chained;
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int dma_len;
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dma_addr_t dma_link_tbl;
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struct talitos_desc desc;
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struct talitos_ptr link_tbl[0];
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};
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static int talitos_map_sg(struct device *dev, struct scatterlist *sg,
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unsigned int nents, enum dma_data_direction dir,
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int chained)
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{
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if (unlikely(chained))
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while (sg) {
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dma_map_sg(dev, sg, 1, dir);
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sg = scatterwalk_sg_next(sg);
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}
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else
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dma_map_sg(dev, sg, nents, dir);
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return nents;
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}
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static void talitos_unmap_sg_chain(struct device *dev, struct scatterlist *sg,
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enum dma_data_direction dir)
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{
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while (sg) {
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dma_unmap_sg(dev, sg, 1, dir);
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sg = scatterwalk_sg_next(sg);
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}
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}
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static void talitos_sg_unmap(struct device *dev,
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struct talitos_edesc *edesc,
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struct scatterlist *src,
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struct scatterlist *dst)
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{
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unsigned int src_nents = edesc->src_nents ? : 1;
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unsigned int dst_nents = edesc->dst_nents ? : 1;
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if (src != dst) {
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if (edesc->src_is_chained)
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talitos_unmap_sg_chain(dev, src, DMA_TO_DEVICE);
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else
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dma_unmap_sg(dev, src, src_nents, DMA_TO_DEVICE);
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if (edesc->dst_is_chained)
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talitos_unmap_sg_chain(dev, dst, DMA_FROM_DEVICE);
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else
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dma_unmap_sg(dev, dst, dst_nents, DMA_FROM_DEVICE);
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} else
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if (edesc->src_is_chained)
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talitos_unmap_sg_chain(dev, src, DMA_BIDIRECTIONAL);
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else
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dma_unmap_sg(dev, src, src_nents, DMA_BIDIRECTIONAL);
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}
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static void ipsec_esp_unmap(struct device *dev,
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struct talitos_edesc *edesc,
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struct aead_request *areq)
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@ -772,15 +824,7 @@ static void ipsec_esp_unmap(struct device *dev,
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dma_unmap_sg(dev, areq->assoc, 1, DMA_TO_DEVICE);
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if (areq->src != areq->dst) {
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dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1,
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DMA_TO_DEVICE);
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dma_unmap_sg(dev, areq->dst, edesc->dst_nents ? : 1,
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DMA_FROM_DEVICE);
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} else {
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dma_unmap_sg(dev, areq->src, edesc->src_nents ? : 1,
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DMA_BIDIRECTIONAL);
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}
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talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
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if (edesc->dma_len)
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dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
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@ -886,7 +930,7 @@ static int sg_to_link_tbl(struct scatterlist *sg, int sg_count,
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link_tbl_ptr->j_extent = 0;
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link_tbl_ptr++;
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cryptlen -= sg_dma_len(sg);
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sg = sg_next(sg);
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sg = scatterwalk_sg_next(sg);
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}
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/* adjust (decrease) last one (or two) entry's len to cryptlen */
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@ -952,12 +996,11 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
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desc->ptr[4].len = cpu_to_be16(cryptlen);
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desc->ptr[4].j_extent = authsize;
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if (areq->src == areq->dst)
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sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1,
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DMA_BIDIRECTIONAL);
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else
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sg_count = dma_map_sg(dev, areq->src, edesc->src_nents ? : 1,
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DMA_TO_DEVICE);
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sg_count = talitos_map_sg(dev, areq->src,
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edesc->src_nents ? : 1,
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(areq->src == areq->dst) ? DMA_BIDIRECTIONAL :
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DMA_TO_DEVICE,
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edesc->src_is_chained);
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if (sg_count == 1) {
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desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->src));
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@ -986,8 +1029,10 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
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desc->ptr[5].j_extent = authsize;
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if (areq->src != areq->dst) {
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sg_count = dma_map_sg(dev, areq->dst, edesc->dst_nents ? : 1,
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DMA_FROM_DEVICE);
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sg_count = talitos_map_sg(dev, areq->dst,
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edesc->dst_nents ? : 1,
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DMA_FROM_DEVICE,
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edesc->dst_is_chained);
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}
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if (sg_count == 1) {
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@ -1037,15 +1082,18 @@ static int ipsec_esp(struct talitos_edesc *edesc, struct aead_request *areq,
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/*
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* derive number of elements in scatterlist
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*/
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static int sg_count(struct scatterlist *sg_list, int nbytes)
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static int sg_count(struct scatterlist *sg_list, int nbytes, int *chained)
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{
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struct scatterlist *sg = sg_list;
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int sg_nents = 0;
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while (nbytes) {
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*chained = 0;
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while (nbytes > 0) {
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sg_nents++;
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nbytes -= sg->length;
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sg = sg_next(sg);
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if (!sg_is_last(sg) && (sg + 1)->length == 0)
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*chained = 1;
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sg = scatterwalk_sg_next(sg);
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}
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return sg_nents;
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@ -1054,28 +1102,32 @@ static int sg_count(struct scatterlist *sg_list, int nbytes)
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/*
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* allocate and map the extended descriptor
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*/
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static struct talitos_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq,
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int icv_stashing)
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static struct talitos_edesc *talitos_edesc_alloc(struct device *dev,
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struct scatterlist *src,
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struct scatterlist *dst,
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unsigned int cryptlen,
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unsigned int authsize,
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int icv_stashing,
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u32 cryptoflags)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
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struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
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struct talitos_edesc *edesc;
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int src_nents, dst_nents, alloc_len, dma_len;
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gfp_t flags = areq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
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int src_chained, dst_chained = 0;
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gfp_t flags = cryptoflags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL :
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GFP_ATOMIC;
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if (areq->cryptlen + ctx->authsize > TALITOS_MAX_DATA_LEN) {
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dev_err(ctx->dev, "cryptlen exceeds h/w max limit\n");
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if (cryptlen + authsize > TALITOS_MAX_DATA_LEN) {
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dev_err(dev, "length exceeds h/w max limit\n");
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return ERR_PTR(-EINVAL);
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}
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src_nents = sg_count(areq->src, areq->cryptlen + ctx->authsize);
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src_nents = sg_count(src, cryptlen + authsize, &src_chained);
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src_nents = (src_nents == 1) ? 0 : src_nents;
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if (areq->dst == areq->src) {
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if (dst == src) {
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dst_nents = src_nents;
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} else {
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dst_nents = sg_count(areq->dst, areq->cryptlen + ctx->authsize);
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dst_nents = sg_count(dst, cryptlen + authsize, &dst_chained);
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dst_nents = (dst_nents == 1) ? 0 : dst_nents;
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}
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@ -1087,28 +1139,41 @@ static struct talitos_edesc *ipsec_esp_edesc_alloc(struct aead_request *areq,
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alloc_len = sizeof(struct talitos_edesc);
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if (src_nents || dst_nents) {
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dma_len = (src_nents + dst_nents + 2) *
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sizeof(struct talitos_ptr) + ctx->authsize;
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sizeof(struct talitos_ptr) + authsize;
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alloc_len += dma_len;
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} else {
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dma_len = 0;
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alloc_len += icv_stashing ? ctx->authsize : 0;
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alloc_len += icv_stashing ? authsize : 0;
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}
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edesc = kmalloc(alloc_len, GFP_DMA | flags);
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if (!edesc) {
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dev_err(ctx->dev, "could not allocate edescriptor\n");
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dev_err(dev, "could not allocate edescriptor\n");
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return ERR_PTR(-ENOMEM);
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}
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edesc->src_nents = src_nents;
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edesc->dst_nents = dst_nents;
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edesc->src_is_chained = src_chained;
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edesc->dst_is_chained = dst_chained;
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edesc->dma_len = dma_len;
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edesc->dma_link_tbl = dma_map_single(ctx->dev, &edesc->link_tbl[0],
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edesc->dma_link_tbl = dma_map_single(dev, &edesc->link_tbl[0],
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edesc->dma_len, DMA_BIDIRECTIONAL);
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return edesc;
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}
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static struct talitos_edesc *aead_edesc_alloc(struct aead_request *areq,
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int icv_stashing)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(areq);
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struct talitos_ctx *ctx = crypto_aead_ctx(authenc);
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return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst,
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areq->cryptlen, ctx->authsize, icv_stashing,
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areq->base.flags);
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}
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static int aead_encrypt(struct aead_request *req)
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{
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struct crypto_aead *authenc = crypto_aead_reqtfm(req);
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@ -1116,7 +1181,7 @@ static int aead_encrypt(struct aead_request *req)
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struct talitos_edesc *edesc;
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/* allocate extended descriptor */
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edesc = ipsec_esp_edesc_alloc(req, 0);
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edesc = aead_edesc_alloc(req, 0);
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if (IS_ERR(edesc))
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return PTR_ERR(edesc);
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@ -1141,7 +1206,7 @@ static int aead_decrypt(struct aead_request *req)
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req->cryptlen -= authsize;
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/* allocate extended descriptor */
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edesc = ipsec_esp_edesc_alloc(req, 1);
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edesc = aead_edesc_alloc(req, 1);
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if (IS_ERR(edesc))
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return PTR_ERR(edesc);
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@ -1188,7 +1253,7 @@ static int aead_givencrypt(struct aead_givcrypt_request *req)
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struct talitos_edesc *edesc;
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/* allocate extended descriptor */
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edesc = ipsec_esp_edesc_alloc(areq, 0);
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edesc = aead_edesc_alloc(areq, 0);
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if (IS_ERR(edesc))
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return PTR_ERR(edesc);
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@ -1203,6 +1268,199 @@ static int aead_givencrypt(struct aead_givcrypt_request *req)
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ipsec_esp_encrypt_done);
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}
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static int ablkcipher_setkey(struct crypto_ablkcipher *cipher,
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const u8 *key, unsigned int keylen)
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{
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struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
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struct ablkcipher_alg *alg = crypto_ablkcipher_alg(cipher);
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if (keylen > TALITOS_MAX_KEY_SIZE)
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goto badkey;
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if (keylen < alg->min_keysize || keylen > alg->max_keysize)
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goto badkey;
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memcpy(&ctx->key, key, keylen);
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ctx->keylen = keylen;
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return 0;
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badkey:
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crypto_ablkcipher_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
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return -EINVAL;
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}
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static void common_nonsnoop_unmap(struct device *dev,
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struct talitos_edesc *edesc,
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struct ablkcipher_request *areq)
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{
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unmap_single_talitos_ptr(dev, &edesc->desc.ptr[5], DMA_FROM_DEVICE);
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unmap_single_talitos_ptr(dev, &edesc->desc.ptr[2], DMA_TO_DEVICE);
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unmap_single_talitos_ptr(dev, &edesc->desc.ptr[1], DMA_TO_DEVICE);
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talitos_sg_unmap(dev, edesc, areq->src, areq->dst);
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if (edesc->dma_len)
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dma_unmap_single(dev, edesc->dma_link_tbl, edesc->dma_len,
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DMA_BIDIRECTIONAL);
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}
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static void ablkcipher_done(struct device *dev,
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struct talitos_desc *desc, void *context,
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int err)
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{
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struct ablkcipher_request *areq = context;
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struct talitos_edesc *edesc =
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container_of(desc, struct talitos_edesc, desc);
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common_nonsnoop_unmap(dev, edesc, areq);
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kfree(edesc);
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areq->base.complete(&areq->base, err);
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}
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static int common_nonsnoop(struct talitos_edesc *edesc,
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struct ablkcipher_request *areq,
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u8 *giv,
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void (*callback) (struct device *dev,
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struct talitos_desc *desc,
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void *context, int error))
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{
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struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
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struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
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struct device *dev = ctx->dev;
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struct talitos_desc *desc = &edesc->desc;
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unsigned int cryptlen = areq->nbytes;
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unsigned int ivsize;
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int sg_count, ret;
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/* first DWORD empty */
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desc->ptr[0].len = 0;
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desc->ptr[0].ptr = 0;
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desc->ptr[0].j_extent = 0;
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/* cipher iv */
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ivsize = crypto_ablkcipher_ivsize(cipher);
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map_single_talitos_ptr(dev, &desc->ptr[1], ivsize, giv ?: areq->info, 0,
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DMA_TO_DEVICE);
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/* cipher key */
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map_single_talitos_ptr(dev, &desc->ptr[2], ctx->keylen,
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(char *)&ctx->key, 0, DMA_TO_DEVICE);
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/*
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* cipher in
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*/
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desc->ptr[3].len = cpu_to_be16(cryptlen);
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desc->ptr[3].j_extent = 0;
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sg_count = talitos_map_sg(dev, areq->src, edesc->src_nents ? : 1,
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(areq->src == areq->dst) ? DMA_BIDIRECTIONAL
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: DMA_TO_DEVICE,
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edesc->src_is_chained);
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if (sg_count == 1) {
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desc->ptr[3].ptr = cpu_to_be32(sg_dma_address(areq->src));
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} else {
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sg_count = sg_to_link_tbl(areq->src, sg_count, cryptlen,
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&edesc->link_tbl[0]);
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if (sg_count > 1) {
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desc->ptr[3].j_extent |= DESC_PTR_LNKTBL_JUMP;
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desc->ptr[3].ptr = cpu_to_be32(edesc->dma_link_tbl);
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dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
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edesc->dma_len, DMA_BIDIRECTIONAL);
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} else {
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/* Only one segment now, so no link tbl needed */
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desc->ptr[3].ptr = cpu_to_be32(sg_dma_address(areq->src));
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}
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}
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/* cipher out */
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desc->ptr[4].len = cpu_to_be16(cryptlen);
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desc->ptr[4].j_extent = 0;
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if (areq->src != areq->dst)
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sg_count = talitos_map_sg(dev, areq->dst,
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edesc->dst_nents ? : 1,
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DMA_FROM_DEVICE,
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edesc->dst_is_chained);
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if (sg_count == 1) {
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desc->ptr[4].ptr = cpu_to_be32(sg_dma_address(areq->dst));
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} else {
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struct talitos_ptr *link_tbl_ptr =
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&edesc->link_tbl[edesc->src_nents + 1];
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desc->ptr[4].j_extent |= DESC_PTR_LNKTBL_JUMP;
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desc->ptr[4].ptr = cpu_to_be32((struct talitos_ptr *)
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edesc->dma_link_tbl +
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edesc->src_nents + 1);
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sg_count = sg_to_link_tbl(areq->dst, sg_count, cryptlen,
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link_tbl_ptr);
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dma_sync_single_for_device(ctx->dev, edesc->dma_link_tbl,
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edesc->dma_len, DMA_BIDIRECTIONAL);
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}
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/* iv out */
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map_single_talitos_ptr(dev, &desc->ptr[5], ivsize, ctx->iv, 0,
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DMA_FROM_DEVICE);
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|
||||
/* last DWORD empty */
|
||||
desc->ptr[6].len = 0;
|
||||
desc->ptr[6].ptr = 0;
|
||||
desc->ptr[6].j_extent = 0;
|
||||
|
||||
ret = talitos_submit(dev, desc, callback, areq);
|
||||
if (ret != -EINPROGRESS) {
|
||||
common_nonsnoop_unmap(dev, edesc, areq);
|
||||
kfree(edesc);
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct talitos_edesc *ablkcipher_edesc_alloc(struct ablkcipher_request *areq)
|
||||
{
|
||||
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
|
||||
struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
|
||||
|
||||
return talitos_edesc_alloc(ctx->dev, areq->src, areq->dst, areq->nbytes,
|
||||
0, 0, areq->base.flags);
|
||||
}
|
||||
|
||||
static int ablkcipher_encrypt(struct ablkcipher_request *areq)
|
||||
{
|
||||
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
|
||||
struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
|
||||
struct talitos_edesc *edesc;
|
||||
|
||||
/* allocate extended descriptor */
|
||||
edesc = ablkcipher_edesc_alloc(areq);
|
||||
if (IS_ERR(edesc))
|
||||
return PTR_ERR(edesc);
|
||||
|
||||
/* set encrypt */
|
||||
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_MODE0_ENCRYPT;
|
||||
|
||||
return common_nonsnoop(edesc, areq, NULL, ablkcipher_done);
|
||||
}
|
||||
|
||||
static int ablkcipher_decrypt(struct ablkcipher_request *areq)
|
||||
{
|
||||
struct crypto_ablkcipher *cipher = crypto_ablkcipher_reqtfm(areq);
|
||||
struct talitos_ctx *ctx = crypto_ablkcipher_ctx(cipher);
|
||||
struct talitos_edesc *edesc;
|
||||
|
||||
/* allocate extended descriptor */
|
||||
edesc = ablkcipher_edesc_alloc(areq);
|
||||
if (IS_ERR(edesc))
|
||||
return PTR_ERR(edesc);
|
||||
|
||||
edesc->desc.hdr = ctx->desc_hdr_template | DESC_HDR_DIR_INBOUND;
|
||||
|
||||
return common_nonsnoop(edesc, areq, NULL, ablkcipher_done);
|
||||
}
|
||||
|
||||
struct talitos_alg_template {
|
||||
struct crypto_alg alg;
|
||||
__be32 desc_hdr_template;
|
||||
|
|
@ -1368,6 +1626,52 @@ static struct talitos_alg_template driver_algs[] = {
|
|||
DESC_HDR_MODE1_MDEU_INIT |
|
||||
DESC_HDR_MODE1_MDEU_PAD |
|
||||
DESC_HDR_MODE1_MDEU_MD5_HMAC,
|
||||
},
|
||||
/* ABLKCIPHER algorithms. */
|
||||
{
|
||||
.alg = {
|
||||
.cra_name = "cbc(aes)",
|
||||
.cra_driver_name = "cbc-aes-talitos",
|
||||
.cra_blocksize = AES_BLOCK_SIZE,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||||
CRYPTO_ALG_ASYNC,
|
||||
.cra_type = &crypto_ablkcipher_type,
|
||||
.cra_ablkcipher = {
|
||||
.setkey = ablkcipher_setkey,
|
||||
.encrypt = ablkcipher_encrypt,
|
||||
.decrypt = ablkcipher_decrypt,
|
||||
.geniv = "eseqiv",
|
||||
.min_keysize = AES_MIN_KEY_SIZE,
|
||||
.max_keysize = AES_MAX_KEY_SIZE,
|
||||
.ivsize = AES_BLOCK_SIZE,
|
||||
}
|
||||
},
|
||||
.desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
|
||||
DESC_HDR_SEL0_AESU |
|
||||
DESC_HDR_MODE0_AESU_CBC,
|
||||
},
|
||||
{
|
||||
.alg = {
|
||||
.cra_name = "cbc(des3_ede)",
|
||||
.cra_driver_name = "cbc-3des-talitos",
|
||||
.cra_blocksize = DES3_EDE_BLOCK_SIZE,
|
||||
.cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER |
|
||||
CRYPTO_ALG_ASYNC,
|
||||
.cra_type = &crypto_ablkcipher_type,
|
||||
.cra_ablkcipher = {
|
||||
.setkey = ablkcipher_setkey,
|
||||
.encrypt = ablkcipher_encrypt,
|
||||
.decrypt = ablkcipher_decrypt,
|
||||
.geniv = "eseqiv",
|
||||
.min_keysize = DES3_EDE_KEY_SIZE,
|
||||
.max_keysize = DES3_EDE_KEY_SIZE,
|
||||
.ivsize = DES3_EDE_BLOCK_SIZE,
|
||||
}
|
||||
},
|
||||
.desc_hdr_template = DESC_HDR_TYPE_COMMON_NONSNOOP_NO_AFEU |
|
||||
DESC_HDR_SEL0_DEU |
|
||||
DESC_HDR_MODE0_DEU_CBC |
|
||||
DESC_HDR_MODE0_DEU_3DES,
|
||||
}
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue