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| author |   Eric Biggers <ebiggers@google.com> | 2019-01-03 20:16:14 -0800 |
|---|---|---|
| committer |   Herbert Xu <herbert@gondor.apana.org.au> | 2019-01-11 14:16:57 +0800 |
| commit | 0872da16dd632e5d1d3f80388f7ae6fbeb17ad53 (patch) | |
| tree | cf221e111a2cfe505066d0f793ddd38fedd11379 /include/crypto | |
| parent | crypto: pcbc - remove bogus memcpy()s with src == dest (diff) | |
| download | linux-dev-0872da16dd632e5d1d3f80388f7ae6fbeb17ad53.tar.xz linux-dev-0872da16dd632e5d1d3f80388f7ae6fbeb17ad53.zip | |
crypto: skcipher - add helper for simple block cipher modes
The majority of skcipher templates (including both the existing ones and
the ones remaining to be converted from the "blkcipher" API) just wrap a
single block cipher algorithm. This includes cbc, cfb, ctr, ecb, kw,
ofb, and pcbc. Add a helper function skcipher_alloc_instance_simple()
that handles allocating an skcipher instance for this common case.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/internal/skcipher.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h index 453e867b4bd9..9de6032209cb 100644 --- a/include/crypto/internal/skcipher.h +++ b/include/crypto/internal/skcipher.h @@ -205,5 +205,20 @@ static inline unsigned int crypto_skcipher_alg_max_keysize( return alg->max_keysize; } +/* Helpers for simple block cipher modes of operation */ +struct skcipher_ctx_simple { + struct crypto_cipher *cipher; /* underlying block cipher */ +}; +static inline struct crypto_cipher * +skcipher_cipher_simple(struct crypto_skcipher *tfm) +{ + struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm); + + return ctx->cipher; +} +struct skcipher_instance * +skcipher_alloc_instance_simple(struct crypto_template *tmpl, struct rtattr **tb, + struct crypto_alg **cipher_alg_ret); + #endif /* _CRYPTO_INTERNAL_SKCIPHER_H */ |