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crypto: chacha - constify ctx and iv arguments

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Constify the ctx and iv arguments to crypto_chacha_init() and the
various chacha*_stream_xor() functions.  This makes it clear that they
are not modified.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers
2019-06-02 22:47:14 -07:00
committed by Herbert Xu
parent 76cadf2244
commit 860ab2e502
5 changed files with 6 additions and 6 deletions
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4
crypto/chacha_generic.c
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@@ -36,7 +36,7 @@ static void chacha_docrypt(u32 *state, u8 *dst, const u8 *src,
}
static int chacha_stream_xor(struct skcipher_request *req,
struct chacha_ctx *ctx, u8 *iv)
const struct chacha_ctx *ctx, const u8 *iv)
{
struct skcipher_walk walk;
u32 state[16];
@@ -60,7 +60,7 @@ static int chacha_stream_xor(struct skcipher_request *req,
return err;
}
void crypto_chacha_init(u32 *state, struct chacha_ctx *ctx, u8 *iv)
void crypto_chacha_init(u32 *state, const struct chacha_ctx *ctx, const u8 *iv)
{
state[0] = 0x61707865; /* "expa" */
state[1] = 0x3320646e; /* "nd 3" */