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betrusted-ed25519-verified/verification/gen/CurveField/FunsExternal_Template.lean
mrwulf 8643bafe14 PHASE 2 COMPLETE ON BETRUSTED: THE FULL POINT-LEVEL LIFT 
(verify_accepts_iff_decompress, button-enforced)

Port of the risc0 decompress chain (identical v4 gen shape: same
instance naming, same RangeFrom+closure from_bytes extraction):

- source patch cee0e17: decompress step_2 negate-then-conditional-assign
  (the documented sqrt_ratio_i rewrite); extract.sh: decompress
  un-opaqued, re-extracted - the step_1/step_2 external axioms vanish
  from the template, decompress is transparent.
- Proofs/DecompressSpec.lean: dalek port, instance rename
  Shared0FieldElement51 -> SharedAFieldElement51.
- Proofs/FromBytesSpec.lean: the v4 closure-loader walk
  (range_from_index_spec + closure_call_spec; window/telescope math
  identical to dalek).
- Proofs/DecompressMain.lean: decompress_of_canonical (standard three)
  + verify_accepts_iff_decompress (corollary verbatim):

    accept  <=>  decompress(R) = [k]*(-A) + [s]*B   (as points).

check.sh: 4-tier Phase 3b; full-lift cone exactly [3 standard +
Signature + sha512_hash3 + to_bytes + Error + Error.new]. Full button
green fresh.

THE FULL POINT-LEVEL LIFT NOW HOLDS ON ALL FOUR PYRAMIDS.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-06 01:53:39 +02:00

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-- THIS FILE WAS AUTOMATICALLY GENERATED BY AENEAS
-- [curve25519_dalek]: external functions.
-- This is a template file: rename it to "FunsExternal.lean" and fill the holes.
import Aeneas
import CurveField.Types
open Aeneas Aeneas.Std Result ControlFlow Error
set_option linter.dupNamespace false
set_option linter.hashCommand false
set_option linter.unusedVariables false
/- You can set the `maxHeartbeats` value with the `-max-heartbeats` CLI option -/
set_option maxHeartbeats 1000000
/- You can set the `maxRecDepth` value with the `-max-recdepth` CLI option -/
set_option maxRecDepth 2048
open curve25519_dalek
/-- [core::array::{impl core::hash::Hash for [T; N]}::hash]:
Source: '/rustc/library/core/src/array/mod.rs', lines 349:4-349:50
Name pattern: [core::array::{core::hash::Hash<[@T; @N]>}::hash]
Visibility: public -/
@[rust_fun "core::array::{core::hash::Hash<[@T; @N]>}::hash"]
axiom Array.Insts.CoreHashHash.hash
{T : Type} {H : Type} {N : Std.Usize} (hashHashInst : core.hash.Hash T)
(hashHasherInst : core.hash.Hasher H) :
Array T N → H → Result H
/-- [core::fmt::{impl core::fmt::Debug for [T]}::fmt]:
Source: '/rustc/library/core/src/fmt/mod.rs', lines 3122:4-3122:50
Name pattern: [core::fmt::{core::fmt::Debug<[@T]>}::fmt]
Visibility: public -/
@[rust_fun "core::fmt::{core::fmt::Debug<[@T]>}::fmt"]
axiom Slice.Insts.CoreFmtDebug.fmt
{T : Type} (DebugInst : core.fmt.Debug T) :
Slice T → core.fmt.Formatter → Result ((core.result.Result Unit
core.fmt.Error) × core.fmt.Formatter)
/-- [core::hash::impls::{impl core::hash::Hash for u8}::hash]:
Source: '/rustc/library/core/src/hash/mod.rs', lines 812:16-812:56
Name pattern: [core::hash::impls::{core::hash::Hash<u8>}::hash]
Visibility: public -/
@[rust_fun "core::hash::impls::{core::hash::Hash<u8>}::hash"]
axiom U8.Insts.CoreHashHash.hash
{H : Type} (HasherInst : core.hash.Hasher H) : Std.U8 → H → Result H
/-- [core::iter::range::{impl core::iter::range::Step for u32}::backward_checked]:
Source: '/rustc/library/core/src/iter/range.rs', lines 290:16-290:74
Name pattern: [core::iter::range::{core::iter::range::Step<u32>}::backward_checked]
Visibility: public -/
@[rust_fun
"core::iter::range::{core::iter::range::Step<u32>}::backward_checked"]
axiom U32.Insts.CoreIterRangeStep.backward_checked
: Std.U32 → Std.Usize → Result (Option Std.U32)
/-- [core::iter::range::{impl core::iter::range::Step for u32}::forward_checked]:
Source: '/rustc/library/core/src/iter/range.rs', lines 282:16-282:73
Name pattern: [core::iter::range::{core::iter::range::Step<u32>}::forward_checked]
Visibility: public -/
@[rust_fun
"core::iter::range::{core::iter::range::Step<u32>}::forward_checked"]
axiom U32.Insts.CoreIterRangeStep.forward_checked
: Std.U32 → Std.Usize → Result (Option Std.U32)
/-- [core::iter::range::{impl core::iter::range::Step for u32}::steps_between]:
Source: '/rustc/library/core/src/iter/range.rs', lines 271:16-271:84
Name pattern: [core::iter::range::{core::iter::range::Step<u32>}::steps_between]
Visibility: public -/
@[rust_fun "core::iter::range::{core::iter::range::Step<u32>}::steps_between"]
axiom U32.Insts.CoreIterRangeStep.steps_between
: Std.U32 → Std.U32 → Result (Std.Usize × (Option Std.Usize))
/-- [core::slice::index::{impl core::slice::index::SliceIndex<[T], [T]> for core::ops::range::RangeFull}::index_mut]:
Source: '/rustc/library/core/src/slice/index.rs', lines 660:4-660:51
Name pattern: [core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::index_mut]
Visibility: public -/
@[rust_fun
"core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::index_mut"]
axiom
core.ops.range.RangeFull.Insts.CoreSliceIndexSliceIndexSliceSlice.index_mut
{T : Type} :
core.ops.range.RangeFull → Slice T → Result ((Slice T) × (Slice T →
Slice T))
/-- [core::slice::index::{impl core::slice::index::SliceIndex<[T], [T]> for core::ops::range::RangeFull}::index]:
Source: '/rustc/library/core/src/slice/index.rs', lines 655:4-655:39
Name pattern: [core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::index]
Visibility: public -/
@[rust_fun
"core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::index"]
axiom core.ops.range.RangeFull.Insts.CoreSliceIndexSliceIndexSliceSlice.index
{T : Type} : core.ops.range.RangeFull → Slice T → Result (Slice T)
/-- [core::slice::index::{impl core::slice::index::SliceIndex<[T], [T]> for core::ops::range::RangeFull}::get_unchecked_mut]:
Source: '/rustc/library/core/src/slice/index.rs', lines 650:4-650:66
Name pattern: [core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get_unchecked_mut]
Visibility: public -/
@[rust_fun
"core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get_unchecked_mut"]
axiom
core.ops.range.RangeFull.Insts.CoreSliceIndexSliceIndexSliceSlice.get_unchecked_mut
{T : Type} :
core.ops.range.RangeFull → MutRawPtr (Slice T) → Result (MutRawPtr (Slice
T))
/-- [core::slice::index::{impl core::slice::index::SliceIndex<[T], [T]> for core::ops::range::RangeFull}::get_unchecked]:
Source: '/rustc/library/core/src/slice/index.rs', lines 645:4-645:66
Name pattern: [core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get_unchecked]
Visibility: public -/
@[rust_fun
"core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get_unchecked"]
axiom
core.ops.range.RangeFull.Insts.CoreSliceIndexSliceIndexSliceSlice.get_unchecked
{T : Type} :
core.ops.range.RangeFull → ConstRawPtr (Slice T) → Result (ConstRawPtr
(Slice T))
/-- [core::slice::index::{impl core::slice::index::SliceIndex<[T], [T]> for core::ops::range::RangeFull}::get_mut]:
Source: '/rustc/library/core/src/slice/index.rs', lines 640:4-640:57
Name pattern: [core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get_mut]
Visibility: public -/
@[rust_fun
"core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get_mut"]
axiom core.ops.range.RangeFull.Insts.CoreSliceIndexSliceIndexSliceSlice.get_mut
{T : Type} :
core.ops.range.RangeFull → Slice T → Result ((Option (Slice T)) ×
(Option (Slice T) → Slice T))
/-- [core::slice::index::{impl core::slice::index::SliceIndex<[T], [T]> for core::ops::range::RangeFull}::get]:
Source: '/rustc/library/core/src/slice/index.rs', lines 635:4-635:45
Name pattern: [core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get]
Visibility: public -/
@[rust_fun
"core::slice::index::{core::slice::index::SliceIndex<core::ops::range::RangeFull, [@T], [@T]>}::get"]
axiom core.ops.range.RangeFull.Insts.CoreSliceIndexSliceIndexSliceSlice.get
{T : Type} :
core.ops.range.RangeFull → Slice T → Result (Option (Slice T))
/-- [subtle::{subtle::Choice}::unwrap_u8]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 133:4-133:33
Name pattern: [subtle::{subtle::Choice}::unwrap_u8]
Visibility: public -/
@[rust_fun "subtle::{subtle::Choice}::unwrap_u8"]
axiom subtle.Choice.unwrap_u8 : subtle.Choice → Result Std.U8
/-- [subtle::{impl core::convert::From<subtle::Choice> for bool}::from]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 153:4-153:35
Name pattern: [subtle::{core::convert::From<bool, subtle::Choice>}::from]
Visibility: public -/
@[rust_fun "subtle::{core::convert::From<bool, subtle::Choice>}::from"]
axiom Bool.Insts.CoreConvertFromChoice.from : subtle.Choice → Result Bool
/-- [subtle::{impl core::ops::bit::BitAnd<subtle::Choice, subtle::Choice> for subtle::Choice}::bitand]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 162:4-162:42
Name pattern: [subtle::{core::ops::bit::BitAnd<subtle::Choice, subtle::Choice, subtle::Choice>}::bitand]
Visibility: public -/
@[rust_fun
"subtle::{core::ops::bit::BitAnd<subtle::Choice, subtle::Choice, subtle::Choice>}::bitand"]
axiom subtle.Choice.Insts.CoreOpsBitBitAndChoiceChoice.bitand
: subtle.Choice → subtle.Choice → Result subtle.Choice
/-- [subtle::{impl core::ops::bit::BitOr<subtle::Choice, subtle::Choice> for subtle::Choice}::bitor]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 177:4-177:41
Name pattern: [subtle::{core::ops::bit::BitOr<subtle::Choice, subtle::Choice, subtle::Choice>}::bitor]
Visibility: public -/
@[rust_fun
"subtle::{core::ops::bit::BitOr<subtle::Choice, subtle::Choice, subtle::Choice>}::bitor"]
axiom subtle.Choice.Insts.CoreOpsBitBitOrChoiceChoice.bitor
: subtle.Choice → subtle.Choice → Result subtle.Choice
/-- [subtle::{impl core::convert::From<u8> for subtle::Choice}::from]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 238:4-238:32
Name pattern: [subtle::{core::convert::From<subtle::Choice, u8>}::from]
Visibility: public -/
@[rust_fun "subtle::{core::convert::From<subtle::Choice, u8>}::from"]
axiom subtle.Choice.Insts.CoreConvertFromU8.from
: Std.U8 → Result subtle.Choice
/-- [subtle::{impl subtle::ConstantTimeEq for [T]}::ct_eq]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 313:4-313:41
Name pattern: [subtle::{subtle::ConstantTimeEq<[@T]>}::ct_eq]
Visibility: public -/
@[rust_fun "subtle::{subtle::ConstantTimeEq<[@T]>}::ct_eq"]
axiom Slice.Insts.SubtleConstantTimeEq.ct_eq
{T : Type} (ConstantTimeEqInst : subtle.ConstantTimeEq T) :
Slice T → Slice T → Result subtle.Choice
/-- [subtle::{impl subtle::ConstantTimeEq for u8}::ct_eq]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 348:12-348:51
Name pattern: [subtle::{subtle::ConstantTimeEq<u8>}::ct_eq]
Visibility: public -/
@[rust_fun "subtle::{subtle::ConstantTimeEq<u8>}::ct_eq"]
axiom U8.Insts.SubtleConstantTimeEq.ct_eq
: Std.U8 → Std.U8 → Result subtle.Choice
/-- [subtle::ConditionallySelectable::conditional_assign]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 442:4-442:66
Name pattern: [subtle::ConditionallySelectable::conditional_assign]
Visibility: public -/
@[rust_fun "subtle::ConditionallySelectable::conditional_assign"]
axiom subtle.ConditionallySelectable.conditional_assign.default
{Self : Type} (ConditionallySelectableInst : subtle.ConditionallySelectable
Self) :
Self → Self → subtle.Choice → Result Self
/-- [subtle::ConditionallySelectable::conditional_swap]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 469:4-469:67
Name pattern: [subtle::ConditionallySelectable::conditional_swap]
Visibility: public -/
@[rust_fun "subtle::ConditionallySelectable::conditional_swap"]
axiom subtle.ConditionallySelectable.conditional_swap.default
{Self : Type} (ConditionallySelectableInst : subtle.ConditionallySelectable
Self) :
Self → Self → subtle.Choice → Result (Self × Self)
/-- [subtle::{impl subtle::ConditionallySelectable for u64}::conditional_select]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 513:12-513:77
Name pattern: [subtle::{subtle::ConditionallySelectable<u64>}::conditional_select]
Visibility: public -/
@[rust_fun
"subtle::{subtle::ConditionallySelectable<u64>}::conditional_select"]
axiom U64.Insts.SubtleConditionallySelectable.conditional_select
: Std.U64 → Std.U64 → subtle.Choice → Result Std.U64
/-- [subtle::{impl subtle::ConditionallySelectable for u64}::conditional_assign]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 521:12-521:74
Name pattern: [subtle::{subtle::ConditionallySelectable<u64>}::conditional_assign]
Visibility: public -/
@[rust_fun
"subtle::{subtle::ConditionallySelectable<u64>}::conditional_assign"]
axiom U64.Insts.SubtleConditionallySelectable.conditional_assign
: Std.U64 → Std.U64 → subtle.Choice → Result Std.U64
/-- [subtle::{impl subtle::ConditionallySelectable for u64}::conditional_swap]:
Source: '/cargo/registry/src/index.crates.io-1949cf8c6b5b557f/subtle-2.6.1/src/lib.rs', lines 529:12-529:75
Name pattern: [subtle::{subtle::ConditionallySelectable<u64>}::conditional_swap]
Visibility: public -/
@[rust_fun "subtle::{subtle::ConditionallySelectable<u64>}::conditional_swap"]
axiom U64.Insts.SubtleConditionallySelectable.conditional_swap
: Std.U64 → Std.U64 → subtle.Choice → Result (Std.U64 × Std.U64)
/-- [curve25519_dalek::backend::get_selected_backend]:
Source: 'curve25519-dalek/src/backend/mod.rs', lines 55:0-75:1 -/
axiom backend.get_selected_backend : Result backend.BackendKind
/-- [curve25519_dalek::backend::serial::scalar_mul::variable_base::mul]:
Source: 'curve25519-dalek/src/backend/serial/scalar_mul/variable_base.rs', lines 11:0-48:1 -/
axiom backend.serial.scalar_mul.variable_base.mul
: edwards.EdwardsPoint → scalar.Scalar → Result edwards.EdwardsPoint
/-- [curve25519_dalek::backend::serial::curve_models::{impl subtle::ConditionallySelectable for curve25519_dalek::backend::serial::curve_models::ProjectiveNielsPoint}::conditional_swap]:
Source: 'curve25519-dalek/src/backend/serial/curve_models/mod.rs', lines 295:0-311:1
Visibility: public -/
axiom
backend.serial.curve_models.ProjectiveNielsPoint.Insts.SubtleConditionallySelectable.conditional_swap
:
backend.serial.curve_models.ProjectiveNielsPoint →
backend.serial.curve_models.ProjectiveNielsPoint → subtle.Choice →
Result (backend.serial.curve_models.ProjectiveNielsPoint ×
backend.serial.curve_models.ProjectiveNielsPoint)
/-- [curve25519_dalek::backend::serial::curve_models::{impl subtle::ConditionallySelectable for curve25519_dalek::backend::serial::curve_models::AffineNielsPoint}::conditional_swap]:
Source: 'curve25519-dalek/src/backend/serial/curve_models/mod.rs', lines 313:0-327:1
Visibility: public -/
axiom
backend.serial.curve_models.AffineNielsPoint.Insts.SubtleConditionallySelectable.conditional_swap
:
backend.serial.curve_models.AffineNielsPoint →
backend.serial.curve_models.AffineNielsPoint → subtle.Choice → Result
(backend.serial.curve_models.AffineNielsPoint ×
backend.serial.curve_models.AffineNielsPoint)
/-- [curve25519_dalek::edwards::{curve25519_dalek::edwards::CompressedEdwardsY}::from_slice]:
Source: 'curve25519-dalek/src/edwards.rs', lines 409:4-411:5
Visibility: public -/
axiom edwards.CompressedEdwardsY.from_slice
:
Slice Std.U8 → Result (core.result.Result edwards.CompressedEdwardsY
core.array.TryFromSliceError)
/-- [curve25519_dalek::edwards::{impl subtle::ConditionallySelectable for curve25519_dalek::edwards::EdwardsPoint}::conditional_swap]:
Source: 'curve25519-dalek/src/edwards.rs', lines 472:0-481:1
Visibility: public -/
axiom edwards.EdwardsPoint.Insts.SubtleConditionallySelectable.conditional_swap
:
edwards.EdwardsPoint → edwards.EdwardsPoint → subtle.Choice → Result
(edwards.EdwardsPoint × edwards.EdwardsPoint)
/-- [curve25519_dalek::edwards::{impl subtle::ConditionallySelectable for curve25519_dalek::edwards::EdwardsPoint}::conditional_assign]:
Source: 'curve25519-dalek/src/edwards.rs', lines 472:0-481:1
Visibility: public -/
axiom
edwards.EdwardsPoint.Insts.SubtleConditionallySelectable.conditional_assign
:
edwards.EdwardsPoint → edwards.EdwardsPoint → subtle.Choice → Result
edwards.EdwardsPoint
/-- [curve25519_dalek::edwards::{impl core::cmp::Eq for curve25519_dalek::edwards::EdwardsPoint}::assert_fields_are_eq]:
Source: 'curve25519-dalek/src/edwards.rs', lines 506:0-506:27
Visibility: public -/
axiom edwards.EdwardsPoint.Insts.CoreCmpEq.assert_fields_are_eq
: edwards.EdwardsPoint → Result Unit
/-- [curve25519_dalek::edwards::{impl core::iter::traits::accum::Sum<T> for curve25519_dalek::edwards::EdwardsPoint}::sum]:
Source: 'curve25519-dalek/src/edwards.rs', lines 676:4-681:5
Visibility: public -/
axiom edwards.EdwardsPoint.Insts.CoreIterTraitsAccumSum.sum
{T : Type} {I : Type} (coreborrowBorrowTEdwardsPointInst : core.borrow.Borrow
T edwards.EdwardsPoint) (coreitertraitsiteratorIteratorInst :
core.iter.traits.iterator.Iterator I T) :
I → Result edwards.EdwardsPoint
/-- [curve25519_dalek::field::{impl core::cmp::Eq for curve25519_dalek::backend::serial::u64::field::FieldElement51}::assert_fields_are_eq]:
Source: 'curve25519-dalek/src/field.rs', lines 84:0-84:27
Visibility: public -/
axiom
backend.serial.u64.field.FieldElement51.Insts.CoreCmpEq.assert_fields_are_eq
: backend.serial.u64.field.FieldElement51 → Result Unit
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