From 31d7247da57226e847f0f102a10c27c0722c429b Mon Sep 17 00:00:00 2001 From: Martin Willi Date: Thu, 16 Jul 2015 19:14:00 +0200 Subject: 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 Signed-off-by: Herbert Xu --- include/crypto/chacha20.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 include/crypto/chacha20.h (limited to 'include/crypto/chacha20.h') diff --git a/include/crypto/chacha20.h b/include/crypto/chacha20.h new file mode 100644 index 000000000000..274bbaeeed0f --- /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 +#include + +#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 -- cgit v1.2.3-59-g8ed1b