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Add simplification of if statement in chacha20

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Signed-off-by: Ben Taylor <ben.taylor@linaro.org>
This commit is contained in:
Ben Taylor 2026-05-27 08:22:21 +01:00
parent 56b050d738
commit 0e9be79ea3
1 changed files with 1 additions and 3 deletions
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4
library/chacha20.c
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@ -233,9 +233,7 @@ static int chacha20_check_counter_wrap(const mbedtls_chacha20_context *ctx,
needed_blocks++;
}
if (needed_blocks != 0U &&
needed_blocks - 1U >
(uint64_t) CHACHA20_MAX_BLOCKS - ctx->state[CHACHA20_CTR_INDEX]) {
if (needed_blocks > (uint64_t) CHACHA20_MAX_BLOCKS + 1 - ctx->state[CHACHA20_CTR_INDEX]) {
return MBEDTLS_ERR_CHACHA20_BAD_INPUT_DATA;
}