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| author | Eric Biggers <ebiggers@google.com> | 2019-12-30 21:19:38 -0600 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-01-09 11:30:53 +0800 |
| commit | af5034e8e4a5838fc77e476c1a91822e449d5869 (patch) | |
| tree | f561a8db9f88931072210330128fed231e3b8b0b /crypto/ccm.c | |
| parent | c4c4db0d59774f6ab726edd012711490437345c2 (diff) | |
| download | lwn-af5034e8e4a5838fc77e476c1a91822e449d5869.tar.gz lwn-af5034e8e4a5838fc77e476c1a91822e449d5869.zip | |
crypto: remove propagation of CRYPTO_TFM_RES_* flags
The CRYPTO_TFM_RES_* flags were apparently meant as a way to make the
->setkey() functions provide more information about errors. But these
flags weren't actually being used or tested, and in many cases they
weren't being set correctly anyway. So they've now been removed.
Also, if someone ever actually needs to start better distinguishing
->setkey() errors (which is somewhat unlikely, as this has been unneeded
for a long time), we'd be much better off just defining different return
values, like -EINVAL if the key is invalid for the algorithm vs.
-EKEYREJECTED if the key was rejected by a policy like "no weak keys".
That would be much simpler, less error-prone, and easier to test.
So just remove CRYPTO_TFM_RES_MASK and all the unneeded logic that
propagates these flags around.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/ccm.c')
| -rw-r--r-- | crypto/ccm.c | 20 |
1 files changed, 4 insertions, 16 deletions
diff --git a/crypto/ccm.c b/crypto/ccm.c index 380eb619f657..44104524e95a 100644 --- a/crypto/ccm.c +++ b/crypto/ccm.c @@ -91,26 +91,19 @@ static int crypto_ccm_setkey(struct crypto_aead *aead, const u8 *key, struct crypto_ccm_ctx *ctx = crypto_aead_ctx(aead); struct crypto_skcipher *ctr = ctx->ctr; struct crypto_ahash *mac = ctx->mac; - int err = 0; + int err; crypto_skcipher_clear_flags(ctr, CRYPTO_TFM_REQ_MASK); crypto_skcipher_set_flags(ctr, crypto_aead_get_flags(aead) & CRYPTO_TFM_REQ_MASK); err = crypto_skcipher_setkey(ctr, key, keylen); - crypto_aead_set_flags(aead, crypto_skcipher_get_flags(ctr) & - CRYPTO_TFM_RES_MASK); if (err) - goto out; + return err; crypto_ahash_clear_flags(mac, CRYPTO_TFM_REQ_MASK); crypto_ahash_set_flags(mac, crypto_aead_get_flags(aead) & CRYPTO_TFM_REQ_MASK); - err = crypto_ahash_setkey(mac, key, keylen); - crypto_aead_set_flags(aead, crypto_ahash_get_flags(mac) & - CRYPTO_TFM_RES_MASK); - -out: - return err; + return crypto_ahash_setkey(mac, key, keylen); } static int crypto_ccm_setauthsize(struct crypto_aead *tfm, @@ -604,7 +597,6 @@ static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key, { struct crypto_rfc4309_ctx *ctx = crypto_aead_ctx(parent); struct crypto_aead *child = ctx->child; - int err; if (keylen < 3) return -EINVAL; @@ -615,11 +607,7 @@ static int crypto_rfc4309_setkey(struct crypto_aead *parent, const u8 *key, crypto_aead_clear_flags(child, CRYPTO_TFM_REQ_MASK); crypto_aead_set_flags(child, crypto_aead_get_flags(parent) & CRYPTO_TFM_REQ_MASK); - err = crypto_aead_setkey(child, key, keylen); - crypto_aead_set_flags(parent, crypto_aead_get_flags(child) & - CRYPTO_TFM_RES_MASK); - - return err; + return crypto_aead_setkey(child, key, keylen); } static int crypto_rfc4309_setauthsize(struct crypto_aead *parent, |