diff options
| author | Martin Willi <martin@strongswan.org> | 2015-07-16 19:14:00 +0200 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-12-14 15:00:50 +0100 |
| commit | 2a2d779b92b6684e41279a8cbc65d6ef6ec2ec39 (patch) | |
| tree | 511b97105d8429c5c1fcca3d577efd090a7a6be0 /include/crypto | |
| parent | eb2d59cb709d3d30d902104b1c0e5e216a55ff48 (diff) | |
BACKPORT: crypto: chacha20 - Export common ChaCha20 helpers
As architecture specific drivers need a software fallback, export a
ChaCha20 en-/decryption function together with some helpers in a header
file.
Signed-off-by: Martin Willi <martin@strongswan.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit 31d7247da57226e847f0f102a10c27c0722c429b,
omitted chacha20poly1305.c changes)
Change-Id: I044f18bf5b01f10da47ce17d58c3ecd4da941dba
Signed-off-by: Eric Biggers <ebiggers@google.com>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/chacha20.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/crypto/chacha20.h b/include/crypto/chacha20.h new file mode 100644 index 000000000..274bbaeee --- /dev/null +++ b/include/crypto/chacha20.h @@ -0,0 +1,25 @@ +/* + * Common values for the ChaCha20 algorithm + */ + +#ifndef _CRYPTO_CHACHA20_H +#define _CRYPTO_CHACHA20_H + +#include <linux/types.h> +#include <linux/crypto.h> + +#define CHACHA20_IV_SIZE 16 +#define CHACHA20_KEY_SIZE 32 +#define CHACHA20_BLOCK_SIZE 64 + +struct chacha20_ctx { + u32 key[8]; +}; + +void crypto_chacha20_init(u32 *state, struct chacha20_ctx *ctx, u8 *iv); +int crypto_chacha20_setkey(struct crypto_tfm *tfm, const u8 *key, + unsigned int keysize); +int crypto_chacha20_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, + struct scatterlist *src, unsigned int nbytes); + +#endif |