diff options
Diffstat (limited to 'src/methods/generic_poly1305/generic_poly1305.c')
| -rw-r--r-- | src/methods/generic_poly1305/generic_poly1305.c | 22 |
1 files changed, 10 insertions, 12 deletions
diff --git a/src/methods/generic_poly1305/generic_poly1305.c b/src/methods/generic_poly1305/generic_poly1305.c index 3517baa..608a526 100644 --- a/src/methods/generic_poly1305/generic_poly1305.c +++ b/src/methods/generic_poly1305/generic_poly1305.c @@ -118,8 +118,7 @@ static void method_session_free(fastd_context_t *ctx UNUSED, fastd_method_sessio } static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fastd_method_session_state_t *session, fastd_buffer_t *out, fastd_buffer_t in) { - fastd_buffer_pull_head(ctx, &in, KEYBYTES); - memset(in.data, 0, KEYBYTES); + fastd_buffer_pull_head_zero(ctx, &in, KEYBYTES); size_t tail_len = alignto(in.len, sizeof(fastd_block128_t))-in.len; *out = fastd_buffer_alloc(ctx, in.len, alignto(COMMON_HEADBYTES, 16), sizeof(fastd_block128_t)+tail_len); @@ -137,7 +136,7 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast fastd_block128_t *inblocks = in.data; fastd_block128_t *outblocks = out->data; - uint8_t tag[crypto_onetimeauth_poly1305_BYTES]; + uint8_t tag[TAGBYTES]; bool ok = session->cipher->crypt(session->cipher_state, outblocks, inblocks, n_blocks*sizeof(fastd_block128_t), nonce); @@ -148,8 +147,8 @@ static bool method_encrypt(fastd_context_t *ctx, fastd_peer_t *peer UNUSED, fast crypto_onetimeauth_poly1305(tag, outblocks->b+KEYBYTES, in.len - KEYBYTES, outblocks->b); - fastd_buffer_push_head(ctx, out, KEYBYTES - TAGBYTES); - memcpy(out->data, tag, TAGBYTES); + fastd_buffer_push_head(ctx, out, KEYBYTES); + fastd_buffer_pull_head_from(ctx, out, tag, TAGBYTES); fastd_buffer_free(in); @@ -185,11 +184,9 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho fastd_buffer_push_head(ctx, &in, COMMON_HEADBYTES); - uint8_t tag[crypto_onetimeauth_poly1305_BYTES]; - memcpy(tag, in.data, TAGBYTES); - - fastd_buffer_pull_head(ctx, &in, KEYBYTES - TAGBYTES); - memset(in.data, 0, KEYBYTES); + uint8_t tag[TAGBYTES]; + fastd_buffer_push_head_to(ctx, &in, tag, TAGBYTES); + fastd_buffer_pull_head_zero(ctx, &in, KEYBYTES); size_t tail_len = alignto(in.len, sizeof(fastd_block128_t))-in.len; *out = fastd_buffer_alloc(ctx, in.len, 0, tail_len); @@ -211,8 +208,9 @@ static bool method_decrypt(fastd_context_t *ctx, fastd_peer_t *peer, fastd_metho fastd_buffer_free(*out); /* restore input buffer */ - fastd_buffer_push_head(ctx, &in, KEYBYTES - TAGBYTES); - memcpy(in.data, tag, TAGBYTES); + fastd_buffer_push_head(ctx, &in, KEYBYTES); + fastd_buffer_pull_head_from(ctx, &in, tag, TAGBYTES); + fastd_buffer_pull_head(ctx, &in, COMMON_HEADBYTES); memcpy(in.data, nonce, COMMON_NONCEBYTES); ((uint8_t*)in.data)[COMMON_NONCEBYTES] = 0; |