diff options
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/s5p-sss.c | 45 |
1 files changed, 40 insertions, 5 deletions
diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c index ba8f2e2ea88f..0064be0e3941 100644 --- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -1813,7 +1813,7 @@ static struct ahash_alg algs_sha1_md5_sha256[] = { }; static void s5p_set_aes(struct s5p_aes_dev *dev, - const u8 *key, const u8 *iv, + const u8 *key, const u8 *iv, const u8 *ctr, unsigned int keylen) { void __iomem *keystart; @@ -1821,6 +1821,9 @@ static void s5p_set_aes(struct s5p_aes_dev *dev, if (iv) memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_IV_DATA(0), iv, 0x10); + if (ctr) + memcpy_toio(dev->aes_ioaddr + SSS_REG_AES_CNT_DATA(0), ctr, 0x10); + if (keylen == AES_KEYSIZE_256) keystart = dev->aes_ioaddr + SSS_REG_AES_KEY_DATA(0); else if (keylen == AES_KEYSIZE_192) @@ -1902,8 +1905,9 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) u32 aes_control; unsigned long flags; int err; - u8 *iv; + u8 *iv, *ctr; + /* This sets bit [13:12] to 00, which selects 128-bit counter */ aes_control = SSS_AES_KEY_CHANGE_MODE; if (mode & FLAGS_AES_DECRYPT) aes_control |= SSS_AES_MODE_DECRYPT; @@ -1911,11 +1915,14 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) { aes_control |= SSS_AES_CHAIN_MODE_CBC; iv = req->info; + ctr = NULL; } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) { aes_control |= SSS_AES_CHAIN_MODE_CTR; - iv = req->info; + iv = NULL; + ctr = req->info; } else { iv = NULL; /* AES_ECB */ + ctr = NULL; } if (dev->ctx->keylen == AES_KEYSIZE_192) @@ -1947,7 +1954,7 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) goto outdata_error; SSS_AES_WRITE(dev, AES_CONTROL, aes_control); - s5p_set_aes(dev, dev->ctx->aes_key, iv, dev->ctx->keylen); + s5p_set_aes(dev, dev->ctx->aes_key, iv, ctr, dev->ctx->keylen); s5p_set_dma_indata(dev, dev->sg_src); s5p_set_dma_outdata(dev, dev->sg_dst); @@ -2025,7 +2032,8 @@ static int s5p_aes_crypt(struct ablkcipher_request *req, unsigned long mode) struct s5p_aes_ctx *ctx = crypto_ablkcipher_ctx(tfm); struct s5p_aes_dev *dev = ctx->dev; - if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE)) { + if (!IS_ALIGNED(req->nbytes, AES_BLOCK_SIZE) && + ((mode & FLAGS_AES_MODE_MASK) != FLAGS_AES_CTR)) { dev_err(dev->dev, "request size is not exact amount of AES blocks\n"); return -EINVAL; } @@ -2072,6 +2080,11 @@ static int s5p_aes_cbc_decrypt(struct ablkcipher_request *req) return s5p_aes_crypt(req, FLAGS_AES_DECRYPT | FLAGS_AES_CBC); } +static int s5p_aes_ctr_crypt(struct ablkcipher_request *req) +{ + return s5p_aes_crypt(req, FLAGS_AES_CTR); +} + static int s5p_aes_cra_init(struct crypto_tfm *tfm) { struct s5p_aes_ctx *ctx = crypto_tfm_ctx(tfm); @@ -2126,6 +2139,28 @@ static struct crypto_alg algs[] = { .decrypt = s5p_aes_cbc_decrypt, } }, + { + .cra_name = "ctr(aes)", + .cra_driver_name = "ctr-aes-s5p", + .cra_priority = 100, + .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | + CRYPTO_ALG_ASYNC | + CRYPTO_ALG_KERN_DRIVER_ONLY, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct s5p_aes_ctx), + .cra_alignmask = 0x0f, + .cra_type = &crypto_ablkcipher_type, + .cra_module = THIS_MODULE, + .cra_init = s5p_aes_cra_init, + .cra_u.ablkcipher = { + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .setkey = s5p_aes_setkey, + .encrypt = s5p_aes_ctr_crypt, + .decrypt = s5p_aes_ctr_crypt, + } + }, }; static int s5p_aes_probe(struct platform_device *pdev) |