diff options
Diffstat (limited to 'security/nss/lib/freebl/verified/Hacl_Chacha20.c')
-rw-r--r-- | security/nss/lib/freebl/verified/Hacl_Chacha20.c | 270 |
1 files changed, 0 insertions, 270 deletions
diff --git a/security/nss/lib/freebl/verified/Hacl_Chacha20.c b/security/nss/lib/freebl/verified/Hacl_Chacha20.c deleted file mode 100644 index 45a743035..000000000 --- a/security/nss/lib/freebl/verified/Hacl_Chacha20.c +++ /dev/null @@ -1,270 +0,0 @@ -/* Copyright 2016-2017 INRIA and Microsoft Corporation - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "Hacl_Chacha20.h" - -static void -Hacl_Lib_LoadStore32_uint32s_from_le_bytes(uint32_t *output, uint8_t *input, uint32_t len) -{ - for (uint32_t i = (uint32_t)0U; i < len; i = i + (uint32_t)1U) { - uint8_t *x0 = input + (uint32_t)4U * i; - uint32_t inputi = load32_le(x0); - output[i] = inputi; - } -} - -static void -Hacl_Lib_LoadStore32_uint32s_to_le_bytes(uint8_t *output, uint32_t *input, uint32_t len) -{ - for (uint32_t i = (uint32_t)0U; i < len; i = i + (uint32_t)1U) { - uint32_t hd1 = input[i]; - uint8_t *x0 = output + (uint32_t)4U * i; - store32_le(x0, hd1); - } -} - -inline static uint32_t -Hacl_Impl_Chacha20_rotate_left(uint32_t a, uint32_t s) -{ - return a << s | a >> ((uint32_t)32U - s); -} - -inline static void -Hacl_Impl_Chacha20_quarter_round(uint32_t *st, uint32_t a, uint32_t b, uint32_t c, uint32_t d) -{ - uint32_t sa = st[a]; - uint32_t sb0 = st[b]; - st[a] = sa + sb0; - uint32_t sd = st[d]; - uint32_t sa10 = st[a]; - uint32_t sda = sd ^ sa10; - st[d] = Hacl_Impl_Chacha20_rotate_left(sda, (uint32_t)16U); - uint32_t sa0 = st[c]; - uint32_t sb1 = st[d]; - st[c] = sa0 + sb1; - uint32_t sd0 = st[b]; - uint32_t sa11 = st[c]; - uint32_t sda0 = sd0 ^ sa11; - st[b] = Hacl_Impl_Chacha20_rotate_left(sda0, (uint32_t)12U); - uint32_t sa2 = st[a]; - uint32_t sb2 = st[b]; - st[a] = sa2 + sb2; - uint32_t sd1 = st[d]; - uint32_t sa12 = st[a]; - uint32_t sda1 = sd1 ^ sa12; - st[d] = Hacl_Impl_Chacha20_rotate_left(sda1, (uint32_t)8U); - uint32_t sa3 = st[c]; - uint32_t sb = st[d]; - st[c] = sa3 + sb; - uint32_t sd2 = st[b]; - uint32_t sa1 = st[c]; - uint32_t sda2 = sd2 ^ sa1; - st[b] = Hacl_Impl_Chacha20_rotate_left(sda2, (uint32_t)7U); -} - -inline static void -Hacl_Impl_Chacha20_double_round(uint32_t *st) -{ - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)0U, (uint32_t)4U, (uint32_t)8U, (uint32_t)12U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)1U, (uint32_t)5U, (uint32_t)9U, (uint32_t)13U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)2U, (uint32_t)6U, (uint32_t)10U, (uint32_t)14U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)3U, (uint32_t)7U, (uint32_t)11U, (uint32_t)15U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)0U, (uint32_t)5U, (uint32_t)10U, (uint32_t)15U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)1U, (uint32_t)6U, (uint32_t)11U, (uint32_t)12U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)2U, (uint32_t)7U, (uint32_t)8U, (uint32_t)13U); - Hacl_Impl_Chacha20_quarter_round(st, (uint32_t)3U, (uint32_t)4U, (uint32_t)9U, (uint32_t)14U); -} - -inline static void -Hacl_Impl_Chacha20_rounds(uint32_t *st) -{ - for (uint32_t i = (uint32_t)0U; i < (uint32_t)10U; i = i + (uint32_t)1U) - Hacl_Impl_Chacha20_double_round(st); -} - -inline static void -Hacl_Impl_Chacha20_sum_states(uint32_t *st, uint32_t *st_) -{ - for (uint32_t i = (uint32_t)0U; i < (uint32_t)16U; i = i + (uint32_t)1U) { - uint32_t xi = st[i]; - uint32_t yi = st_[i]; - st[i] = xi + yi; - } -} - -inline static void -Hacl_Impl_Chacha20_copy_state(uint32_t *st, uint32_t *st_) -{ - memcpy(st, st_, (uint32_t)16U * sizeof st_[0U]); -} - -inline static void -Hacl_Impl_Chacha20_chacha20_core(uint32_t *k, uint32_t *st, uint32_t ctr) -{ - st[12U] = ctr; - Hacl_Impl_Chacha20_copy_state(k, st); - Hacl_Impl_Chacha20_rounds(k); - Hacl_Impl_Chacha20_sum_states(k, st); -} - -inline static void -Hacl_Impl_Chacha20_chacha20_block(uint8_t *stream_block, uint32_t *st, uint32_t ctr) -{ - uint32_t st_[16U] = { 0U }; - Hacl_Impl_Chacha20_chacha20_core(st_, st, ctr); - Hacl_Lib_LoadStore32_uint32s_to_le_bytes(stream_block, st_, (uint32_t)16U); -} - -inline static void -Hacl_Impl_Chacha20_init(uint32_t *st, uint8_t *k, uint8_t *n1) -{ - uint32_t *stcst = st; - uint32_t *stk = st + (uint32_t)4U; - uint32_t *stc = st + (uint32_t)12U; - uint32_t *stn = st + (uint32_t)13U; - stcst[0U] = (uint32_t)0x61707865U; - stcst[1U] = (uint32_t)0x3320646eU; - stcst[2U] = (uint32_t)0x79622d32U; - stcst[3U] = (uint32_t)0x6b206574U; - Hacl_Lib_LoadStore32_uint32s_from_le_bytes(stk, k, (uint32_t)8U); - stc[0U] = (uint32_t)0U; - Hacl_Lib_LoadStore32_uint32s_from_le_bytes(stn, n1, (uint32_t)3U); -} - -static void -Hacl_Impl_Chacha20_update(uint8_t *output, uint8_t *plain, uint32_t *st, uint32_t ctr) -{ - uint32_t b[48U] = { 0U }; - uint32_t *k = b; - uint32_t *ib = b + (uint32_t)16U; - uint32_t *ob = b + (uint32_t)32U; - Hacl_Impl_Chacha20_chacha20_core(k, st, ctr); - Hacl_Lib_LoadStore32_uint32s_from_le_bytes(ib, plain, (uint32_t)16U); - for (uint32_t i = (uint32_t)0U; i < (uint32_t)16U; i = i + (uint32_t)1U) { - uint32_t xi = ib[i]; - uint32_t yi = k[i]; - ob[i] = xi ^ yi; - } - Hacl_Lib_LoadStore32_uint32s_to_le_bytes(output, ob, (uint32_t)16U); -} - -static void -Hacl_Impl_Chacha20_update_last( - uint8_t *output, - uint8_t *plain, - uint32_t len, - uint32_t *st, - uint32_t ctr) -{ - uint8_t block[64U] = { 0U }; - Hacl_Impl_Chacha20_chacha20_block(block, st, ctr); - uint8_t *mask = block; - for (uint32_t i = (uint32_t)0U; i < len; i = i + (uint32_t)1U) { - uint8_t xi = plain[i]; - uint8_t yi = mask[i]; - output[i] = xi ^ yi; - } -} - -static void -Hacl_Impl_Chacha20_chacha20_counter_mode_blocks( - uint8_t *output, - uint8_t *plain, - uint32_t num_blocks, - uint32_t *st, - uint32_t ctr) -{ - for (uint32_t i = (uint32_t)0U; i < num_blocks; i = i + (uint32_t)1U) { - uint8_t *b = plain + (uint32_t)64U * i; - uint8_t *o = output + (uint32_t)64U * i; - Hacl_Impl_Chacha20_update(o, b, st, ctr + i); - } -} - -static void -Hacl_Impl_Chacha20_chacha20_counter_mode( - uint8_t *output, - uint8_t *plain, - uint32_t len, - uint32_t *st, - uint32_t ctr) -{ - uint32_t blocks_len = len >> (uint32_t)6U; - uint32_t part_len = len & (uint32_t)0x3fU; - uint8_t *output_ = output; - uint8_t *plain_ = plain; - uint8_t *output__ = output + (uint32_t)64U * blocks_len; - uint8_t *plain__ = plain + (uint32_t)64U * blocks_len; - Hacl_Impl_Chacha20_chacha20_counter_mode_blocks(output_, plain_, blocks_len, st, ctr); - if (part_len > (uint32_t)0U) - Hacl_Impl_Chacha20_update_last(output__, plain__, part_len, st, ctr + blocks_len); -} - -static void -Hacl_Impl_Chacha20_chacha20( - uint8_t *output, - uint8_t *plain, - uint32_t len, - uint8_t *k, - uint8_t *n1, - uint32_t ctr) -{ - uint32_t buf[16U] = { 0U }; - uint32_t *st = buf; - Hacl_Impl_Chacha20_init(st, k, n1); - Hacl_Impl_Chacha20_chacha20_counter_mode(output, plain, len, st, ctr); -} - -void -Hacl_Chacha20_chacha20_key_block(uint8_t *block, uint8_t *k, uint8_t *n1, uint32_t ctr) -{ - uint32_t buf[16U] = { 0U }; - uint32_t *st = buf; - Hacl_Impl_Chacha20_init(st, k, n1); - Hacl_Impl_Chacha20_chacha20_block(block, st, ctr); -} - -/* - This function implements Chacha20 - - val chacha20 : - output:uint8_p -> - plain:uint8_p{ disjoint output plain } -> - len:uint32_t{ v len = length output /\ v len = length plain } -> - key:uint8_p{ length key = 32 } -> - nonce:uint8_p{ length nonce = 12 } -> - ctr:uint32_t{ v ctr + length plain / 64 < pow2 32 } -> - Stack unit - (requires - fun h -> live h output /\ live h plain /\ live h nonce /\ live h key) - (ensures - fun h0 _ h1 -> - live h1 output /\ live h0 plain /\ modifies_1 output h0 h1 /\ - live h0 nonce /\ - live h0 key /\ - h1.[ output ] == - chacha20_encrypt_bytes h0.[ key ] h0.[ nonce ] (v ctr) h0.[ plain ]) -*/ -void -Hacl_Chacha20_chacha20( - uint8_t *output, - uint8_t *plain, - uint32_t len, - uint8_t *k, - uint8_t *n1, - uint32_t ctr) -{ - Hacl_Impl_Chacha20_chacha20(output, plain, len, k, n1, ctr); -} |