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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2023-05-19 10:28:37 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2023-05-24 12:12:33 +0200 |
| commit | ed51bba18f563594b5ddf7aaa5fd61abe5e474ae (patch) | |
| tree | 28d730184470ad30351b622083f287fad3e96da4 /crypto/cmac.c | |
| parent | crypto: cipher - Add crypto_clone_cipher (diff) | |
| download | linux-ed51bba18f563594b5ddf7aaa5fd61abe5e474ae.tar.xz linux-ed51bba18f563594b5ddf7aaa5fd61abe5e474ae.zip | |
crypto: cmac - Add support for cloning
Allow cmac to be cloned. The underlying cipher needs to support
cloning by not having a cra_init function (all implementations of
aes that do not require a fallback can be cloned).
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/cmac.c')
| -rw-r--r-- | crypto/cmac.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/crypto/cmac.c b/crypto/cmac.c index bcc6f19a4f64..fce6b0f58e88 100644 --- a/crypto/cmac.c +++ b/crypto/cmac.c @@ -213,7 +213,22 @@ static int cmac_init_tfm(struct crypto_shash *tfm) ctx->child = cipher; return 0; -}; +} + +static int cmac_clone_tfm(struct crypto_shash *tfm, struct crypto_shash *otfm) +{ + struct cmac_tfm_ctx *octx = crypto_shash_ctx(otfm); + struct cmac_tfm_ctx *ctx = crypto_shash_ctx(tfm); + struct crypto_cipher *cipher; + + cipher = crypto_clone_cipher(octx->child); + if (IS_ERR(cipher)) + return PTR_ERR(cipher); + + ctx->child = cipher; + + return 0; +} static void cmac_exit_tfm(struct crypto_shash *tfm) { @@ -280,6 +295,7 @@ static int cmac_create(struct crypto_template *tmpl, struct rtattr **tb) inst->alg.final = crypto_cmac_digest_final; inst->alg.setkey = crypto_cmac_digest_setkey; inst->alg.init_tfm = cmac_init_tfm; + inst->alg.clone_tfm = cmac_clone_tfm; inst->alg.exit_tfm = cmac_exit_tfm; inst->free = shash_free_singlespawn_instance; |