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https://github.com/saymrwulf/verifying-crypto-with-lean.git
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saymrwulf
45048d4898
- 53-page LaTeX/TikZ book (main.pdf + full sources): from zero background to reading the real Ed25519/Pasta verification projects - runnable exercises with sorry-holes + complete solutions for chapters 2-7, 9, 12; every solution file compiles clean (zero errors, no sorry) against Lean v4.30.0-rc2 + Mathlib 5450b53e - lake project pinned to the same toolchain/Mathlib the solutions were verified with; students fetch the Mathlib cache, never build it - honesty ledger in README: what was machine-checked and how Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
181 lines
9 KiB
TeX
181 lines
9 KiB
TeX
% ============================================================================
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% preamble.tex — shared style for "Verifying Cryptography with Lean 4"
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% A didactic identity: warm ink on soft paper, one confident accent, and a
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% small family of pedagogical boxes that each mean exactly one thing.
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% ============================================================================
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\usepackage[T1]{fontenc}
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\usepackage[utf8]{inputenc}
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\usepackage{lmodern}
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\usepackage[margin=2.4cm,headsep=0.6cm]{geometry}
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\usepackage{amsmath,amssymb,amsthm}
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\usepackage{xcolor}
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\usepackage{tikz}
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\usetikzlibrary{arrows.meta,positioning,shapes.geometric,calc,fit,backgrounds,decorations.pathreplacing,shapes.misc}
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\usepackage[most]{tcolorbox}
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\usepackage{listings}
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\usepackage{microtype}
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\usepackage{enumitem}
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\usepackage{fancyhdr}
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\usepackage{titlesec}
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\usepackage{booktabs}
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\usepackage[strings]{underscore} % plain _ works in text; math subscripts unaffected
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\usepackage{hyperref}
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% ---- palette -------------------------------------------------------------
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% Ink is a deep blue-slate; the accent is a warm coral used sparingly; a
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% calm teal marks "things that are true / proven". Neutrals carry a faint
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% blue bias so nothing reads as unconsidered grey.
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\definecolor{ink}{HTML}{1C2430}
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\definecolor{ink2}{HTML}{51607A}
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\definecolor{paper}{HTML}{FBFAF7}
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\definecolor{accent}{HTML}{E4572E} % coral — the one bold colour
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\definecolor{accentsoft}{HTML}{FBE7DF}
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\definecolor{proven}{HTML}{1E7F5C} % teal-green — proven / correct
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\definecolor{provensoft}{HTML}{E1F1EA}
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\definecolor{warn}{HTML}{B4690E} % amber — pitfalls
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\definecolor{warnsoft}{HTML}{FBEFD8}
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\definecolor{codebg}{HTML}{F3F1EC}
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\definecolor{rule}{HTML}{DDE2E9}
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\definecolor{kw}{HTML}{2B6CB0}
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\definecolor{ty}{HTML}{6B46C1}
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\definecolor{cmt}{HTML}{718096}
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\definecolor{str}{HTML}{2F855A}
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\hypersetup{colorlinks=true,linkcolor=accent,urlcolor=kw,citecolor=proven,
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pdftitle={Verifying Cryptography with Lean 4},pdfauthor={Fable 5}}
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% ---- page furniture ------------------------------------------------------
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\pagecolor{paper}
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\color{ink}
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\pagestyle{fancy}\fancyhf{}
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\renewcommand{\headrulewidth}{0pt}
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\fancyfoot[C]{\small\color{ink2}\thepage}
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% single header element: chapter title only (no number prefix), no collisions
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\renewcommand{\chaptermark}[1]{\markboth{#1}{}}
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\fancyhead[R]{\small\color{ink2}\scshape\leftmark}
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\titleformat{\section}{\Large\bfseries\color{ink}}{\color{accent}\thesection}{0.7em}{}
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\titleformat{\subsection}{\large\bfseries\color{ink}}{\color{accent}\thesubsection}{0.6em}{}
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\setlength{\parskip}{0.55em}\setlength{\parindent}{0pt}
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% ---- listings: Lean 4 and Rust ------------------------------------------
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\lstdefinelanguage{Lean}{
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morekeywords={theorem,lemma,def,example,by,intro,intros,exact,apply,rw,simp,
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omega,decide,ring,constructor,rfl,have,let,fun,match,with,end,namespace,
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open,import,structure,inductive,instance,class,where,do,return,if,then,else,
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sorry,cases,induction,unfold,calc,show,from,at,using,Prop,Type,Nat,Int,Bool,True,False},
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sensitive=true,
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morecomment=[l]{--},
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morecomment=[s]{/-}{-/},
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morestring=[b]",
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}
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\lstdefinelanguage{RustL}{
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morekeywords={fn,let,mut,const,pub,struct,impl,for,in,if,else,match,return,
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u8,u16,u32,u64,u128,usize,i32,bool,self,Self,use,mod,where,unsafe,as},
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sensitive=true,
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morecomment=[l]{//},
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morecomment=[s]{/*}{*/},
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morestring=[b]",
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}
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\lstset{
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% render the Unicode symbols real Lean code uses
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literate={≠}{{$\neq$}}1 {∀}{{$\forall$}}1 {∃}{{$\exists$}}1
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{→}{{$\to$}}1 {↔}{{$\leftrightarrow$}}1 {∧}{{$\wedge$}}1
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{∨}{{$\vee$}}1 {¬}{{$\neg$}}1 {≤}{{$\leq$}}1 {≥}{{$\geq$}}1
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{ℕ}{{$\mathbb{N}$}}1 {ℤ}{{$\mathbb{Z}$}}1 {ℓ}{{$\ell$}}1
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{×}{{$\times$}}1 {∈}{{$\in$}}1 {∑}{{$\Sigma$}}1
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{α}{{$\alpha$}}1 {β}{{$\beta$}}1 {⟨}{{$\langle$}}1 {⟩}{{$\rangle$}}1
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{↦}{{$\mapsto$}}1 {⊢}{{$\vdash$}}1 {𝔽}{{$\mathbb{F}$}}1
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{₀}{{$_0$}}1 {₁}{{$_1$}}1 {₂}{{$_2$}}1 {²}{{$^2$}}1 {⁵}{{$^5$}}1
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{·}{{$\cdot$}}1 {←}{{$\leftarrow$}}1 {⟦}{{$[\![$}}1 {⟧}{{$]\!]$}}1
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{∘}{{$\circ$}}1 {≡}{{$\equiv$}}1 {∣}{{$\mid$}}1 {⁻¹}{{$^{-1}$}}1,
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basicstyle=\ttfamily\small\color{ink},
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keywordstyle=\color{kw}\bfseries,
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commentstyle=\color{cmt}\itshape,
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stringstyle=\color{str},
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numberstyle=\ttfamily\scriptsize\color{ink2},
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backgroundcolor=\color{codebg},
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frame=single, framerule=0pt, framesep=8pt,
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rulecolor=\color{codebg},
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xleftmargin=10pt, xrightmargin=6pt,
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breaklines=true, showstringspaces=false,
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columns=fullflexible, keepspaces=true,
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aboveskip=1em, belowskip=1em,
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}
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% Inline code: plain styled text (robust in tables/footnotes, unlike lstinline).
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% Unicode symbols in inline code are handled by the declarations below.
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\newcommand{\lean}[1]{{\ttfamily\small #1}}
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\newcommand{\rust}[1]{{\ttfamily\small #1}}
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\newcommand{\code}[1]{{\ttfamily\small #1}}
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\DeclareUnicodeCharacter{2192}{\ensuremath{\to}} % →
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\DeclareUnicodeCharacter{2190}{\ensuremath{\leftarrow}} % ←
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\DeclareUnicodeCharacter{2194}{\ensuremath{\leftrightarrow}} % ↔
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\DeclareUnicodeCharacter{2200}{\ensuremath{\forall}} % ∀
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\DeclareUnicodeCharacter{2203}{\ensuremath{\exists}} % ∃
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\DeclareUnicodeCharacter{2227}{\ensuremath{\wedge}} % ∧
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\DeclareUnicodeCharacter{2228}{\ensuremath{\vee}} % ∨
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\DeclareUnicodeCharacter{00AC}{\ensuremath{\neg}} % ¬
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\DeclareUnicodeCharacter{2260}{\ensuremath{\neq}} % ≠
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\DeclareUnicodeCharacter{2264}{\ensuremath{\leq}} % ≤
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\DeclareUnicodeCharacter{2265}{\ensuremath{\geq}} % ≥
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\DeclareUnicodeCharacter{22A2}{\ensuremath{\vdash}} % ⊢
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\DeclareUnicodeCharacter{00B7}{\ensuremath{\cdot}} % ·
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\DeclareUnicodeCharacter{2115}{\ensuremath{\mathbb{N}}} % ℕ
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\DeclareUnicodeCharacter{2124}{\ensuremath{\mathbb{Z}}} % ℤ
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\DeclareUnicodeCharacter{2113}{\ensuremath{\ell}} % ℓ
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\DeclareUnicodeCharacter{00D7}{\ensuremath{\times}} % ×
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\DeclareUnicodeCharacter{2208}{\ensuremath{\in}} % ∈
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\DeclareUnicodeCharacter{2211}{\ensuremath{\Sigma}} % ∑
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\DeclareUnicodeCharacter{2261}{\ensuremath{\equiv}} % ≡
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\DeclareUnicodeCharacter{2223}{\ensuremath{\mid}} % ∣
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\DeclareUnicodeCharacter{27E8}{\ensuremath{\langle}} % ⟨
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\DeclareUnicodeCharacter{27E9}{\ensuremath{\rangle}} % ⟩
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\DeclareUnicodeCharacter{1D53D}{\ensuremath{\mathbb{F}}} % 𝔽
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\DeclareUnicodeCharacter{2080}{\ensuremath{{}_0}} % ₀
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\DeclareUnicodeCharacter{2081}{\ensuremath{{}_1}} % ₁
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\DeclareUnicodeCharacter{2082}{\ensuremath{{}_2}} % ₂
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\DeclareUnicodeCharacter{00B2}{\ensuremath{{}^2}} % ²
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\DeclareUnicodeCharacter{2075}{\ensuremath{{}^5}} % ⁵
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% ---- pedagogical boxes: each means ONE thing ----------------------------
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% BIG IDEA — the load-bearing concept of a section.
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\newtcolorbox{bigidea}[1][]{enhanced,breakable,colback=accentsoft,
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colframe=accent,boxrule=0.4pt,arc=3pt,left=10pt,right=10pt,top=8pt,bottom=8pt,
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fonttitle=\bfseries\color{paper},coltitle=paper,title={\faLightbulb\ The big idea},#1}
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% TRY IT — a hands-on invitation to run something.
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\newtcolorbox{tryit}[1][]{enhanced,breakable,colback=codebg,colframe=ink2,
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boxrule=0.4pt,arc=3pt,left=10pt,right=10pt,top=8pt,bottom=8pt,
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fonttitle=\bfseries\color{paper},coltitle=paper,title={\faTerminal\ Try it yourself},#1}
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% PITFALL — a trap, with its tell.
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\newtcolorbox{pitfall}[1][]{enhanced,breakable,colback=warnsoft,colframe=warn,
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boxrule=0.4pt,arc=3pt,left=10pt,right=10pt,top=8pt,bottom=8pt,
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fonttitle=\bfseries\color{paper},coltitle=paper,title={\faExclamationTriangle\ Pitfall},#1}
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% AHA — an intuition that clicks.
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\newtcolorbox{aha}[1][]{enhanced,breakable,colback=provensoft,colframe=proven,
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boxrule=0.4pt,arc=3pt,left=10pt,right=10pt,top=8pt,bottom=8pt,
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fonttitle=\bfseries\color{paper},coltitle=paper,title={\faStar\ Aha},#1}
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% CHECKPOINT — end-of-chapter self-check.
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\newtcolorbox{checkpoint}[1][]{enhanced,breakable,colback=white,colframe=ink,
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boxrule=0.6pt,arc=3pt,left=10pt,right=10pt,top=8pt,bottom=8pt,
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fonttitle=\bfseries\color{paper},coltitle=paper,title={\faFlagCheckered\ Checkpoint},#1}
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% Poor-man's icons (fontawesome may be absent): draw tiny glyphs with text.
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\providecommand{\faLightbulb}{\raisebox{-1pt}{\small$\ast$}}
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\providecommand{\faTerminal}{\raisebox{-1pt}{\small\ttfamily>\_}}
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\providecommand{\faExclamationTriangle}{\raisebox{-1pt}{\small$\triangle$}}
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\providecommand{\faStar}{\raisebox{-1pt}{\small$\star$}}
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\providecommand{\faFlagCheckered}{\raisebox{-1pt}{\small$\bowtie$}}
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% ---- math shortcuts the whole book uses ---------------------------------
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\newcommand{\F}{\mathbb{F}}
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\newcommand{\Z}{\mathbb{Z}}
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\newcommand{\N}{\mathbb{N}}
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\newcommand{\Fp}{\mathbb{F}_p}
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\newcommand{\Zmod}[1]{\mathbb{Z}/#1\mathbb{Z}}
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% double-bracket "denotation" delimiters without stmaryrd
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\newcommand{\denote}[1]{\ensuremath{[\mkern-3.3mu[ #1 ]\mkern-3.3mu]}}
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% exercises
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\newcounter{exc}[section]
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\newcommand{\exercise}[1]{\refstepcounter{exc}\smallskip\noindent%
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{\bfseries\color{accent}Exercise \thechapter.\theexc.}\ #1\smallskip}
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