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authorwolfbeast <mcwerewolf@gmail.com>2018-04-25 21:33:33 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-04-25 21:33:33 +0200
commitfba28f19754f62b5227650143d5441fc86d4c7d7 (patch)
tree26629d73f83543ff92a060fd7b310bb748b13173 /security/nss/lib/freebl/verified/specs/Spec.CTR.fst
parentb4154e043bfc0d2f301d88304efc896989d650bf (diff)
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Revert "Update NSS to 3.35-RTM"
This reverts commit f1a0f0a56fdd0fc39f255174ce08c06b91c66c94.
Diffstat (limited to 'security/nss/lib/freebl/verified/specs/Spec.CTR.fst')
-rw-r--r--security/nss/lib/freebl/verified/specs/Spec.CTR.fst98
1 files changed, 0 insertions, 98 deletions
diff --git a/security/nss/lib/freebl/verified/specs/Spec.CTR.fst b/security/nss/lib/freebl/verified/specs/Spec.CTR.fst
deleted file mode 100644
index e411cd353..000000000
--- a/security/nss/lib/freebl/verified/specs/Spec.CTR.fst
+++ /dev/null
@@ -1,98 +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.
- */
-
-module Spec.CTR
-
-module ST = FStar.HyperStack.ST
-
-open FStar.Mul
-open FStar.Seq
-open Spec.Lib
-
-#reset-options "--initial_fuel 0 --max_fuel 0 --initial_ifuel 0 --max_ifuel 0"
-
-type block_cipher_ctx = {
- keylen: nat ;
- blocklen: (x:nat{x>0});
- noncelen: nat;
- counterbits: nat;
- incr: pos}
-
-type key (c:block_cipher_ctx) = lbytes c.keylen
-type nonce (c:block_cipher_ctx) = lbytes c.noncelen
-type block (c:block_cipher_ctx) = lbytes (c.blocklen*c.incr)
-type counter (c:block_cipher_ctx) = UInt.uint_t c.counterbits
-type block_cipher (c:block_cipher_ctx) = key c -> nonce c -> counter c -> block c
-
-val xor: #len:nat -> x:lbytes len -> y:lbytes len -> Tot (lbytes len)
-let xor #len x y = map2 FStar.UInt8.(fun x y -> x ^^ y) x y
-
-
-val counter_mode_blocks:
- ctx: block_cipher_ctx ->
- bc: block_cipher ctx ->
- k:key ctx -> n:nonce ctx -> c:counter ctx ->
- plain:seq UInt8.t{c + ctx.incr * (length plain / ctx.blocklen) < pow2 ctx.counterbits /\
- length plain % (ctx.blocklen * ctx.incr) = 0} ->
- Tot (lbytes (length plain))
- (decreases (length plain))
-#reset-options "--z3rlimit 200 --max_fuel 0"
-let rec counter_mode_blocks ctx block_enc key nonce counter plain =
- let len = length plain in
- let len' = len / (ctx.blocklen * ctx.incr) in
- Math.Lemmas.lemma_div_mod len (ctx.blocklen * ctx.incr) ;
- if len = 0 then Seq.createEmpty #UInt8.t
- else (
- let prefix, block = split plain (len - ctx.blocklen * ctx.incr) in
- (* TODO: move to a single lemma for clarify *)
- Math.Lemmas.lemma_mod_plus (length prefix) 1 (ctx.blocklen * ctx.incr);
- Math.Lemmas.lemma_div_le (length prefix) len ctx.blocklen;
- Spec.CTR.Lemmas.lemma_div len (ctx.blocklen * ctx.incr);
- (* End TODO *)
- let cipher = counter_mode_blocks ctx block_enc key nonce counter prefix in
- let mask = block_enc key nonce (counter + (len / ctx.blocklen - 1) * ctx.incr) in
- let eb = xor block mask in
- cipher @| eb
- )
-
-
-val counter_mode:
- ctx: block_cipher_ctx ->
- bc: block_cipher ctx ->
- k:key ctx -> n:nonce ctx -> c:counter ctx ->
- plain:seq UInt8.t{c + ctx.incr * (length plain / ctx.blocklen) < pow2 ctx.counterbits} ->
- Tot (lbytes (length plain))
- (decreases (length plain))
-#reset-options "--z3rlimit 200 --max_fuel 0"
-let counter_mode ctx block_enc key nonce counter plain =
- let len = length plain in
- let blocks_len = (ctx.incr * ctx.blocklen) * (len / (ctx.blocklen * ctx.incr)) in
- let part_len = len % (ctx.blocklen * ctx.incr) in
- (* TODO: move to a single lemma for clarify *)
- Math.Lemmas.lemma_div_mod len (ctx.blocklen * ctx.incr);
- Math.Lemmas.multiple_modulo_lemma (len / (ctx.blocklen * ctx.incr)) (ctx.blocklen * ctx.incr);
- Math.Lemmas.lemma_div_le (blocks_len) len ctx.blocklen;
- (* End TODO *)
- let blocks, last_block = split plain blocks_len in
- let cipher_blocks = counter_mode_blocks ctx block_enc key nonce counter blocks in
- let cipher_last_block =
- if part_len > 0
- then (* encrypt final partial block(s) *)
- let mask = block_enc key nonce (counter+ctx.incr*(length plain / ctx.blocklen)) in
- let mask = slice mask 0 part_len in
- assert(length last_block = part_len);
- xor #part_len last_block mask
- else createEmpty in
- cipher_blocks @| cipher_last_block