GaloisInc/cryptol

Health v2 · maintenance only

Adoption not part of the score

1220 stars · 129 forks observed · 2026-09-03

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Cryptol is a domain-specific language and interpreter for specifying cryptographic algorithms, developed by Galois. It provides an executable REPL with property-based testing (`:check`) and SMT-backed formal proving (`:prove`) of cryptographic specifications.

Use cases

• write executable specifications of cryptographic algorithms
• prove properties of a cipher implementation with an SMT solver
• randomly test cryptographic predicates against generated vectors
• formally document a cryptographic module
• verify that an implementation matches its reference spec

When to choose

• you need a formal, executable specification language for cryptography
• you want machine-checked proofs of crypto properties via Z3/Yices/CVC
• you are designing or auditing cryptographic algorithms

When to avoid

• you need a general-purpose programming language
• you want a high-performance production crypto library rather than a specification tool
• you are not working with cryptographic or bit-vector-level algorithms

Facets

cli-tool · maturity active

interpreter testing programming-language cryptography security programming-languages windows cli cryptol smt-solvers formal-specification quickcheck haskell formal-verification interpreter cryptography linux macos

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