botan-src

This crate compiles the sources of the Botan cryptography library as a static library. It is supposed to be used by the botan-sys crate.

A high level Rust interface built on this library is included in the botan crate.

Building against a custom Botan tree

The crate ships the upstream Botan release tarball in vendor/ and extracts it at build time. Two environment variables let you override that, which is useful when testing a fork or pre-release:

• BOTAN_SRC_DIR=/path/to/checkout — build from an existing source tree (e.g. a git checkout). No extraction, no checksum.
• BOTAN_SRC_TARBALL=/path/to/foo.tar.xz — extract this .tar.xz instead of the bundled one. No checksum.

If neither is set, the bundled tarball is extracted and verified against the pinned SHA-256.