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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-05-30 03:09:05 +0200 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2018-05-31 01:24:51 +0200 |
| commit | 046ab6962ba870c97087b23a7473af3610d19780 (patch) | |
| tree | fe9f9a61fa40a1acaade44e0b24476eddbe6b7d1 /src/selftest/chacha20poly1305.h | |
| parent | 101b71c192047d5966b3c59dba088957ca51e588 (diff) | |
chacha20poly1305: combine stack variables into union
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/selftest/chacha20poly1305.h')
| -rw-r--r-- | src/selftest/chacha20poly1305.h | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/src/selftest/chacha20poly1305.h b/src/selftest/chacha20poly1305.h index efbb76b..738ee9b 100644 --- a/src/selftest/chacha20poly1305.h +++ b/src/selftest/chacha20poly1305.h @@ -1276,28 +1276,31 @@ static const struct chacha20poly1305_testvec xchacha20poly1305_dec_vectors[] __i static inline void chacha20poly1305_selftest_encrypt_bignonce(u8 *dst, const u8 *src, const size_t src_len, const u8 *ad, const size_t ad_len, const u8 nonce[12], const u8 key[CHACHA20POLY1305_KEYLEN]) { bool have_simd = chacha20poly1305_init_simd(); - __le64 len; struct poly1305_ctx poly1305_state; struct chacha20_ctx chacha20_state; - u8 block0[POLY1305_KEY_SIZE] = { 0 }; + union { + u8 block0[POLY1305_KEY_SIZE]; + __le64 lens[2]; + } b = {{ 0 }}; chacha20_init(&chacha20_state, key, 0); chacha20_state.counter[1] = le32_to_cpu(*(__le32 *)(nonce + 0)); chacha20_state.counter[2] = le32_to_cpu(*(__le32 *)(nonce + 4)); chacha20_state.counter[3] = le32_to_cpu(*(__le32 *)(nonce + 8)); - chacha20(&chacha20_state, block0, block0, sizeof(block0), have_simd); - poly1305_init(&poly1305_state, block0, have_simd); + chacha20(&chacha20_state, b.block0, b.block0, sizeof(b.block0), have_simd); + poly1305_init(&poly1305_state, b.block0, have_simd); poly1305_update(&poly1305_state, ad, ad_len, have_simd); poly1305_update(&poly1305_state, pad0, (0x10 - ad_len) & 0xf, have_simd); chacha20(&chacha20_state, dst, src, src_len, have_simd); poly1305_update(&poly1305_state, dst, src_len, have_simd); poly1305_update(&poly1305_state, pad0, (0x10 - src_len) & 0xf, have_simd); - len = cpu_to_le64(ad_len); - poly1305_update(&poly1305_state, (u8 *)&len, sizeof(len), have_simd); - len = cpu_to_le64(src_len); - poly1305_update(&poly1305_state, (u8 *)&len, sizeof(len), have_simd); + b.lens[0] = cpu_to_le64(ad_len); + b.lens[1] = cpu_to_le64(src_len); + poly1305_update(&poly1305_state, (u8 *)b.lens, sizeof(b.lens), have_simd); poly1305_finish(&poly1305_state, dst + src_len, have_simd); chacha20poly1305_deinit_simd(have_simd); + memzero_explicit(&chacha20_state, sizeof(chacha20_state)); + memzero_explicit(&b, sizeof(b)); } static inline void chacha20poly1305_selftest_encrypt(u8 *dst, const u8 *src, const size_t src_len, const u8 *ad, const size_t ad_len, const u8 *nonce, const size_t nonce_len, const u8 key[CHACHA20POLY1305_KEYLEN]) |