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struct dthe_aes_req_ctx *rctx = aead_request_ctx_dma(req); u32 tag[AES_BLOCK_WORDS]; + u64 assoclen = req->assoclen; + u64 cryptlen = req->cryptlen; + u64 authsize = ctx->authsize; int nents; int ret; @@ -765,12 +768,17 @@ static int dthe_aead_enc_get_tag(struct aead_request *req) if (ret) return ret; - nents = sg_nents_for_len(req->dst, req->cryptlen + req->assoclen + ctx->authsize); + nents = sg_nents_for_len(req->dst, cryptlen + assoclen + authsize); if (nents < 0) return nents; - sg_pcopy_from_buffer(req->dst, nents, tag, ctx->authsize, - req->assoclen + req->cryptlen); + /* + * DTHEv2 is supported on ARM64 K3 SoCs. The off_t skip argument in + * sg_pcopy_*() hence is 64-bit and the sum assoclen + cryptlen + * does not overflow. + */ + sg_pcopy_from_buffer(req->dst, nents, tag, authsize, + assoclen + cryptlen); return 0; } @@ -781,6 +789,9 @@ static int dthe_aead_dec_verify_tag(struct aead_request *req) struct dthe_aes_req_ctx *rctx = aead_request_ctx_dma(req); u32 tag_out[AES_BLOCK_WORDS]; u32 tag_in[AES_BLOCK_WORDS]; + u64 assoclen = req->assoclen; + u64 cryptlen = req->cryptlen; + u64 authsize = ctx->authsize; int nents; int ret; @@ -788,14 +799,19 @@ static int dthe_aead_dec_verify_tag(struct aead_request *req) if (ret) return ret; - nents = sg_nents_for_len(req->src, req->assoclen + req->cryptlen); + nents = sg_nents_for_len(req->src, assoclen + cryptlen); if (nents < 0) return nents; - sg_pcopy_to_buffer(req->src, nents, tag_in, ctx->authsize, - req->assoclen + req->cryptlen - ctx->authsize); + /* + * DTHEv2 is supported on ARM64 K3 SoCs. The off_t skip argument in + * sg_pcopy_*() hence is 64-bit and the sum assoclen + cryptlen + * does not overflow. + */ + sg_pcopy_to_buffer(req->src, nents, tag_in, authsize, + assoclen + cryptlen - authsize); - if (crypto_memneq(tag_in, tag_out, ctx->authsize)) + if (crypto_memneq(tag_in, tag_out, authsize)) return -EBADMSG; else return 0; @@ -889,10 +905,10 @@ static int dthe_aead_run(struct crypto_engine *engine, void *areq) struct dthe_aes_req_ctx *rctx = aead_request_ctx_dma(req); struct dthe_data *dev_data = rctx->dev_data; - unsigned int cryptlen = req->cryptlen; - unsigned int assoclen = req->assoclen; - unsigned int authsize = ctx->authsize; - unsigned int unpadded_cryptlen; + u64 cryptlen = req->cryptlen; + u64 assoclen = req->assoclen; + u64 authsize = ctx->authsize; + u64 unpadded_cryptlen; struct scatterlist *src = NULL; struct scatterlist *dst = NULL; struct scatterlist *aad_sg = NULL; -- 2.34.1