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| author |   Ard Biesheuvel <ardb@kernel.org> | 2019-11-05 16:01:05 +0200 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2019-12-11 16:36:59 +0800 |
| commit | f0956d42c14abfeda9d0be7f06999363cab3e99a (patch) | |
| tree | acd550bb2ffb114085a390f2bb0f566d6e769fab /drivers/crypto/omap-aes.c | |
| parent | crypto: omap-aes-gcm - check length of assocdata in RFC4106 mode (diff) | |
| download | linux-dev-f0956d42c14abfeda9d0be7f06999363cab3e99a.tar.xz linux-dev-f0956d42c14abfeda9d0be7f06999363cab3e99a.zip | |
crypto: omap-aes-gcm - use the AES library to encrypt the tag
The OMAP AES-GCM implementation uses a fallback ecb(aes) skcipher to
produce the keystream to encrypt the output tag. Let's use the new
AES library instead - this is much simpler, and shouldn't affect
performance given that it only involves a single block.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto/omap-aes.c')
| -rw-r--r-- | drivers/crypto/omap-aes.c | 26 |
1 files changed, 2 insertions, 24 deletions
diff --git a/drivers/crypto/omap-aes.c b/drivers/crypto/omap-aes.c index 161af3bf667c..d63ab370030e 100644 --- a/drivers/crypto/omap-aes.c +++ b/drivers/crypto/omap-aes.c @@ -645,7 +645,6 @@ static int omap_aes_init_tfm(struct crypto_skcipher *tfm) static int omap_aes_gcm_cra_init(struct crypto_aead *tfm) { struct omap_aes_dev *dd = NULL; - struct omap_aes_ctx *ctx = crypto_aead_ctx(tfm); int err; /* Find AES device, currently picks the first device */ @@ -663,12 +662,6 @@ static int omap_aes_gcm_cra_init(struct crypto_aead *tfm) } tfm->reqsize = sizeof(struct omap_aes_reqctx); - ctx->ctr = crypto_alloc_skcipher("ecb(aes)", 0, 0); - if (IS_ERR(ctx->ctr)) { - pr_warn("could not load aes driver for encrypting IV\n"); - return PTR_ERR(ctx->ctr); - } - return 0; } @@ -682,19 +675,6 @@ static void omap_aes_exit_tfm(struct crypto_skcipher *tfm) ctx->fallback = NULL; } -static void omap_aes_gcm_cra_exit(struct crypto_aead *tfm) -{ - struct omap_aes_ctx *ctx = crypto_aead_ctx(tfm); - - if (ctx->fallback) - crypto_free_sync_skcipher(ctx->fallback); - - ctx->fallback = NULL; - - if (ctx->ctr) - crypto_free_skcipher(ctx->ctr); -} - /* ********************** ALGS ************************************ */ static struct skcipher_alg algs_ecb_cbc[] = { @@ -778,12 +758,11 @@ static struct aead_alg algs_aead_gcm[] = { .cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = 1, - .cra_ctxsize = sizeof(struct omap_aes_ctx), + .cra_ctxsize = sizeof(struct omap_aes_gcm_ctx), .cra_alignmask = 0xf, .cra_module = THIS_MODULE, }, .init = omap_aes_gcm_cra_init, - .exit = omap_aes_gcm_cra_exit, .ivsize = GCM_AES_IV_SIZE, .maxauthsize = AES_BLOCK_SIZE, .setkey = omap_aes_gcm_setkey, @@ -799,12 +778,11 @@ static struct aead_alg algs_aead_gcm[] = { .cra_flags = CRYPTO_ALG_ASYNC | CRYPTO_ALG_KERN_DRIVER_ONLY, .cra_blocksize = 1, - .cra_ctxsize = sizeof(struct omap_aes_ctx), + .cra_ctxsize = sizeof(struct omap_aes_gcm_ctx), .cra_alignmask = 0xf, .cra_module = THIS_MODULE, }, .init = omap_aes_gcm_cra_init, - .exit = omap_aes_gcm_cra_exit, .maxauthsize = AES_BLOCK_SIZE, .ivsize = GCM_RFC4106_IV_SIZE, .setkey = omap_aes_4106gcm_setkey, |