| 149 | } |
| 150 | |
| 151 | fn begin_op(&mut self, flags: u8, more: bool) { |
| 152 | // Check if we're continuing an operation |
| 153 | if more { |
| 154 | assert_eq!( |
| 155 | self.cur_flags, flags, |
| 156 | "You tried to continue op {:#b} but changed flags to {:#b}", |
| 157 | self.cur_flags, flags, |
| 158 | ); |
| 159 | return; |
| 160 | } |
| 161 | |
| 162 | // Skip adjusting direction information (we just use AD, PRF) |
| 163 | assert_eq!( |
| 164 | flags & FLAG_T, |
| 165 | 0u8, |
| 166 | "You used the T flag, which this implementation doesn't support" |
| 167 | ); |
| 168 | |
| 169 | let old_begin = self.pos_begin; |
| 170 | self.pos_begin = self.pos + 1; |
| 171 | self.cur_flags = flags; |
| 172 | |
| 173 | self.absorb(&[old_begin, flags]); |
| 174 | |
| 175 | // Force running F if C or K is set |
| 176 | let force_f = 0 != (flags & (FLAG_C | FLAG_K)); |
| 177 | |
| 178 | if force_f && self.pos != 0 { |
| 179 | self.run_f(); |
| 180 | } |
| 181 | } |
| 182 | } |
| 183 | |
| 184 | impl Deref for AlignedKeccakState { |