kris/xmss-KAT-generator
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Joost Rijneveld 384b228c58
Support messages that exceed the stack size 
Previous code allocated an array on the stack of mlen bytes, but
it should be possible to also sign heap-space messages. By relying
on the fact that sm and m fit the message + signature, we move
the message so that 4*n bytes of prefix can be added.
2017-10-31 17:21:27 +01:00
test Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
ui Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
.gitignore Clean up tests 2017-10-26 18:06:15 +02:00
fips202.c Clean up includes 2017-10-19 17:38:26 +02:00
fips202.h Perform various reformatting / renaming 2017-10-23 14:10:39 +02:00
hash_address.c Rename parameters for readability and consistency 2017-10-24 17:51:56 +02:00
hash_address.h Rename parameters for readability and consistency 2017-10-24 17:51:56 +02:00
hash.c Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
hash.h Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
LICENSE Simplify licensing using LICENSE file 2017-10-19 17:38:34 +02:00
Makefile Clean up tests 2017-10-26 18:06:15 +02:00
params.c Compute sk size after defining BDS k parameter 2017-10-30 13:11:22 +01:00
params.h Let xmss_core decide on secret key size 2017-10-26 18:06:17 +02:00
randombytes.c Refactor for more consistent style and readability 2017-08-03 17:39:37 +02:00
randombytes.h Perform various reformatting / renaming 2017-10-23 14:10:39 +02:00
README.md Clarify current BDS traversal support 2017-10-26 18:06:17 +02:00
wots.c Reorder ull_to_bytes parameters to group output 2017-10-23 16:19:16 +02:00
wots.h Refactor and deduplicate WOTS 2017-10-23 15:54:14 +02:00
xmss_commons.c Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
xmss_commons.h Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
xmss_core_fast.c Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
xmss_core_fast.h Let xmss_core decide on secret key size 2017-10-26 18:06:17 +02:00
xmss_core.c Support messages that exceed the stack size 2017-10-31 17:21:27 +01:00
xmss_core.h Let xmss_core decide on secret key size 2017-10-26 18:06:17 +02:00
xmss.c Revert to using runtime-only parameter struct 2017-10-16 12:09:07 +02:00
xmss.h Perform various reformatting / renaming 2017-10-23 14:10:39 +02:00

README.md

XMSS reference code

This repository contains the reference implementation that accompanies the Internet Draft "XMSS: Extended Hash-Based Signatures", draft-irtf-cfrg-xmss-hash-based-signatures.

This reference implementation supports all parameter sets as defined in the Draft at run-time (specified by prefixing the public and private keys with a 32-bit oid). Implementations that want to use compile-time parameter sets can remove the struct xmss_params function parameter.

While the behavior of the code in this repository is supposed to be stable, the API is not yet fully complete. In particular, the wrapper for run-time parameters does not yet support the back-end functions that make use of BDS traversal. This means that the xmss_core_fast.c back-end is somewhat hard to use. This is the most immediate open TODO, and will be resolved soon.

When using the current code base, please be careful, expect changes and watch this document for further documentation.

Dependencies

For the SHA-2 hash functions (i.e. SHA-256 and SHA-512), we rely on OpenSSL. Make sure to install the OpenSSL development headers. On Debian-based systems, this is achieved by installing the OpenSSL development package libssl-dev.

License

This reference implementation was written by Andreas Hülsing and Joost Rijneveld. All included code is available under the CC0 1.0 Universal Public Domain Dedication.