diff options
Diffstat (limited to 'drivers/crypto/cavium/nitrox/nitrox_skcipher.c')
| -rw-r--r-- | drivers/crypto/cavium/nitrox/nitrox_skcipher.c | 134 |
1 files changed, 99 insertions, 35 deletions
diff --git a/drivers/crypto/cavium/nitrox/nitrox_skcipher.c b/drivers/crypto/cavium/nitrox/nitrox_skcipher.c index 3cdce1f0f257..97af4d50d003 100644 --- a/drivers/crypto/cavium/nitrox/nitrox_skcipher.c +++ b/drivers/crypto/cavium/nitrox/nitrox_skcipher.c @@ -6,6 +6,7 @@ #include <crypto/aes.h> #include <crypto/skcipher.h> +#include <crypto/scatterwalk.h> #include <crypto/ctr.h> #include <crypto/internal/des.h> #include <crypto/xts.h> @@ -47,6 +48,63 @@ static enum flexi_cipher flexi_cipher_type(const char *name) return cipher->value; } +static void free_src_sglist(struct skcipher_request *skreq) +{ + struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq); + + kfree(nkreq->src); +} + +static void free_dst_sglist(struct skcipher_request *skreq) +{ + struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq); + + kfree(nkreq->dst); +} + +static void nitrox_skcipher_callback(void *arg, int err) +{ + struct skcipher_request *skreq = arg; + + free_src_sglist(skreq); + free_dst_sglist(skreq); + if (err) { + pr_err_ratelimited("request failed status 0x%0x\n", err); + err = -EINVAL; + } + + skcipher_request_complete(skreq, err); +} + +static void nitrox_cbc_cipher_callback(void *arg, int err) +{ + struct skcipher_request *skreq = arg; + struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq); + struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(skreq); + int ivsize = crypto_skcipher_ivsize(cipher); + unsigned int start = skreq->cryptlen - ivsize; + + if (err) { + nitrox_skcipher_callback(arg, err); + return; + } + + if (nkreq->creq.ctrl.s.arg == ENCRYPT) { + scatterwalk_map_and_copy(skreq->iv, skreq->dst, start, ivsize, + 0); + } else { + if (skreq->src != skreq->dst) { + scatterwalk_map_and_copy(skreq->iv, skreq->src, start, + ivsize, 0); + } else { + memcpy(skreq->iv, nkreq->iv_out, ivsize); + kfree(nkreq->iv_out); + } + } + + nitrox_skcipher_callback(arg, err); +} + static int nitrox_skcipher_init(struct crypto_skcipher *tfm) { struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(tfm); @@ -63,6 +121,8 @@ static int nitrox_skcipher_init(struct crypto_skcipher *tfm) nitrox_put_device(nctx->ndev); return -ENOMEM; } + + nctx->callback = nitrox_skcipher_callback; nctx->chdr = chdr; nctx->u.ctx_handle = (uintptr_t)((u8 *)chdr->vaddr + sizeof(struct ctx_hdr)); @@ -71,6 +131,19 @@ static int nitrox_skcipher_init(struct crypto_skcipher *tfm) return 0; } +static int nitrox_cbc_init(struct crypto_skcipher *tfm) +{ + int err; + struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(tfm); + + err = nitrox_skcipher_init(tfm); + if (err) + return err; + + nctx->callback = nitrox_cbc_cipher_callback; + return 0; +} + static void nitrox_skcipher_exit(struct crypto_skcipher *tfm) { struct nitrox_crypto_ctx *nctx = crypto_skcipher_ctx(tfm); @@ -173,34 +246,6 @@ static int alloc_dst_sglist(struct skcipher_request *skreq, int ivsize) return 0; } -static void free_src_sglist(struct skcipher_request *skreq) -{ - struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq); - - kfree(nkreq->src); -} - -static void free_dst_sglist(struct skcipher_request *skreq) -{ - struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq); - - kfree(nkreq->dst); -} - -static void nitrox_skcipher_callback(void *arg, int err) -{ - struct skcipher_request *skreq = arg; - - free_src_sglist(skreq); - free_dst_sglist(skreq); - if (err) { - pr_err_ratelimited("request failed status 0x%0x\n", err); - err = -EINVAL; - } - - skcipher_request_complete(skreq, err); -} - static int nitrox_skcipher_crypt(struct skcipher_request *skreq, bool enc) { struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(skreq); @@ -240,8 +285,28 @@ static int nitrox_skcipher_crypt(struct skcipher_request *skreq, bool enc) } /* send the crypto request */ - return nitrox_process_se_request(nctx->ndev, creq, - nitrox_skcipher_callback, skreq); + return nitrox_process_se_request(nctx->ndev, creq, nctx->callback, + skreq); +} + +static int nitrox_cbc_decrypt(struct skcipher_request *skreq) +{ + struct nitrox_kcrypt_request *nkreq = skcipher_request_ctx(skreq); + struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(skreq); + int ivsize = crypto_skcipher_ivsize(cipher); + gfp_t flags = (skreq->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ? + GFP_KERNEL : GFP_ATOMIC; + unsigned int start = skreq->cryptlen - ivsize; + + if (skreq->src != skreq->dst) + return nitrox_skcipher_crypt(skreq, false); + + nkreq->iv_out = kmalloc(ivsize, flags); + if (!nkreq->iv_out) + return -ENOMEM; + + scatterwalk_map_and_copy(nkreq->iv_out, skreq->src, start, ivsize, 0); + return nitrox_skcipher_crypt(skreq, false); } static int nitrox_aes_encrypt(struct skcipher_request *skreq) @@ -340,8 +405,8 @@ static struct skcipher_alg nitrox_skciphers[] = { { .ivsize = AES_BLOCK_SIZE, .setkey = nitrox_aes_setkey, .encrypt = nitrox_aes_encrypt, - .decrypt = nitrox_aes_decrypt, - .init = nitrox_skcipher_init, + .decrypt = nitrox_cbc_decrypt, + .init = nitrox_cbc_init, .exit = nitrox_skcipher_exit, }, { .base = { @@ -428,7 +493,6 @@ static struct skcipher_alg nitrox_skciphers[] = { { .cra_blocksize = AES_BLOCK_SIZE, .cra_ctxsize = sizeof(struct nitrox_crypto_ctx), .cra_alignmask = 0, - .cra_type = &crypto_ablkcipher_type, .cra_module = THIS_MODULE, }, .min_keysize = AES_MIN_KEY_SIZE, @@ -455,8 +519,8 @@ static struct skcipher_alg nitrox_skciphers[] = { { .ivsize = DES3_EDE_BLOCK_SIZE, .setkey = nitrox_3des_setkey, .encrypt = nitrox_3des_encrypt, - .decrypt = nitrox_3des_decrypt, - .init = nitrox_skcipher_init, + .decrypt = nitrox_cbc_decrypt, + .init = nitrox_cbc_init, .exit = nitrox_skcipher_exit, }, { .base = { |