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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2007-12-05 11:08:36 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2008-01-10 22:16:44 +0100 |
| commit | ecfc43292f68566c144afca966b46b371c26d56c (patch) | |
| tree | ef332abe1573434836a90e188257a252ca9f896a /crypto/ablkcipher.c | |
| parent | [CRYPTO] cryptd: Use geniv of the underlying algorithm (diff) | |
| download | linux-ecfc43292f68566c144afca966b46b371c26d56c.tar.xz linux-ecfc43292f68566c144afca966b46b371c26d56c.zip | |
[CRYPTO] skcipher: Add skcipher_geniv_alloc/skcipher_geniv_free
This patch creates the infrastructure to help the construction of givcipher
templates that wrap around existing blkcipher/ablkcipher algorithms by adding
an IV generator to them.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/ablkcipher.c')
| -rw-r--r-- | crypto/ablkcipher.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/crypto/ablkcipher.c b/crypto/ablkcipher.c index 8f48b4d58fca..092d9659b861 100644 --- a/crypto/ablkcipher.c +++ b/crypto/ablkcipher.c @@ -80,6 +80,7 @@ static int crypto_init_ablkcipher_ops(struct crypto_tfm *tfm, u32 type, crt->setkey = setkey; crt->encrypt = alg->encrypt; crt->decrypt = alg->decrypt; + crt->base = __crypto_ablkcipher_cast(tfm); crt->ivsize = alg->ivsize; return 0; @@ -122,11 +123,13 @@ static int crypto_init_givcipher_ops(struct crypto_tfm *tfm, u32 type, if (alg->ivsize > PAGE_SIZE / 8) return -EINVAL; - crt->setkey = setkey; + crt->setkey = tfm->__crt_alg->cra_flags & CRYPTO_ALG_GENIV ? + alg->setkey : setkey; crt->encrypt = alg->encrypt; crt->decrypt = alg->decrypt; crt->givencrypt = alg->givencrypt; crt->givdecrypt = alg->givdecrypt ?: no_givdecrypt; + crt->base = __crypto_ablkcipher_cast(tfm); crt->ivsize = alg->ivsize; return 0; @@ -155,6 +158,11 @@ const struct crypto_type crypto_givcipher_type = { }; EXPORT_SYMBOL_GPL(crypto_givcipher_type); +const char *crypto_default_geniv(const struct crypto_alg *alg) +{ + return alg->cra_flags & CRYPTO_ALG_ASYNC ? "eseqiv" : "chainiv"; +} + int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn, const char *name, u32 type, u32 mask) { |