diff options
Diffstat (limited to 'libkeccak_degeneralise_spec.c')
| -rw-r--r-- | libkeccak_degeneralise_spec.c | 34 |
1 files changed, 16 insertions, 18 deletions
diff --git a/libkeccak_degeneralise_spec.c b/libkeccak_degeneralise_spec.c index 7fc51aa..99c8e00 100644 --- a/libkeccak_degeneralise_spec.c +++ b/libkeccak_degeneralise_spec.c @@ -81,29 +81,27 @@ libkeccak_degeneralise_spec(struct libkeccak_generalised_spec *restrict spec, st } - if (!have_bitrate && !have_capacity && !have_output) { - state_size = deft(state_size, 1600L); - output = ((state_size << 5) / 100L + 7L) & ~0x07L; - bitrate = output << 1; - capacity = state_size - bitrate; - output = output >= 8 ? output : 8; - } else if (!have_bitrate && !have_capacity) { - bitrate = 1024; - capacity = 1600 - 1024; - state_size = deft(state_size, bitrate + capacity); - } else if (!have_bitrate) { + if (have_bitrate + have_capacity == 2) { + if (!have_state_size) { + state_size = bitrate + capacity; + output = deft(output, capacity * 2L <= 8 ? 8 : capacity * 2L); + } else if (state_size != bitrate + capacity) { + return LIBKECCAK_GENERALISED_SPEC_ERROR_STATE_BITRATE_CAPACITY_INCONSISTENCY; + } + } else if (have_bitrate + have_capacity == 1) { state_size = deft(state_size, 1600L); - bitrate = state_size - capacity; - output = deft(output, capacity == 8 ? 8 : (capacity << 1)); - } else if (!have_capacity) { + bitrate = deft(bitrate, state_size - capacity); + capacity = deft(capacity, state_size - bitrate); + output = deft(output, capacity * 2L <= 8 ? 8 : capacity * 2L); + } else { state_size = deft(state_size, 1600L); + output = deft(output, (state_size * 32L / 100L + 7L) & ~7L); + bitrate = 2L * output; capacity = state_size - bitrate; - output = deft(output, capacity == 8 ? 8 : (capacity << 1)); - } else { - state_size = deft(state_size, bitrate + capacity); - output = deft(output, capacity == 8 ? 8 : (capacity << 1)); + output = deft(output, bitrate / 2L <= 8 ? 8 : bitrate / 2L); } + spec->capacity = output_spec->capacity = capacity; spec->bitrate = output_spec->bitrate = bitrate; spec->output = output_spec->output = output; |