Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
crypto: cipher - Add crypto_clone_cipher
Allow simple ciphers to be cloned, if they don't have a cra_init
function. This basically rules out those ciphers that require a
fallback.
In future simple ciphers will be eliminated, and replaced with a
linear skcipher interface. When that happens this restriction will
disappear.
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>
+25
+23
crypto/cipher.c
+23
crypto/cipher.c
···
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cipher_crypt_one(tfm, dst, src, false);
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}
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EXPORT_SYMBOL_NS_GPL(crypto_cipher_decrypt_one, CRYPTO_INTERNAL);
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+
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struct crypto_cipher *crypto_clone_cipher(struct crypto_cipher *cipher)
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{
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struct crypto_tfm *tfm = crypto_cipher_tfm(cipher);
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struct crypto_alg *alg = tfm->__crt_alg;
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struct crypto_cipher *ncipher;
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struct crypto_tfm *ntfm;
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if (alg->cra_init)
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return ERR_PTR(-ENOSYS);
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ntfm = __crypto_alloc_tfm(alg, CRYPTO_ALG_TYPE_CIPHER,
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CRYPTO_ALG_TYPE_MASK);
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if (IS_ERR(ntfm))
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return ERR_CAST(ntfm);
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ntfm->crt_flags = tfm->crt_flags;
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ncipher = __crypto_cipher_cast(ntfm);
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return ncipher;
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}
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EXPORT_SYMBOL_GPL(crypto_clone_cipher);
+2
include/crypto/internal/cipher.h
+2
include/crypto/internal/cipher.h