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path: root/src/crypto/chacha20.h
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2023-07-26crypto: add FSChaCha20, a rekeying wrapper around ChaCha20Pieter Wuille
This adds the FSChaCha20 stream cipher as specified in BIP324, a wrapper around the ChaCha20 stream cipher (specified in RFC8439 section 2.4) which automatically rekeys every N messages, and manages the nonces used for encryption. Co-authored-by: dhruv <856960+dhruv@users.noreply.github.com>
2023-07-07crypto: Implement RFC8439-compatible variant of ChaCha20Pieter Wuille
There are two variants of ChaCha20 in use. The original one uses a 64-bit nonce and a 64-bit block counter, while the one used in RFC8439 uses a 96-bit nonce and 32-bit block counter. This commit changes the interface to use the 96/32 split (but automatically incrementing the first 32-bit part of the nonce when the 32-bit block counter overflows, so to retain compatibility with >256 GiB output). Simultaneously, also merge the SetIV and Seek64 functions, as we almost always call both anyway. Co-authored-by: dhruv <856960+dhruv@users.noreply.github.com>
2023-01-30Inline ChaCha20 32-byte specific constantsPieter Wuille
2023-01-30Only support 32-byte keys in ChaCha20{,Aligned}Pieter Wuille
2023-01-30Make unrestricted ChaCha20 cipher not waste keystream bytesPieter Wuille
Co-authored-by: dhruv <856960+dhruv@users.noreply.github.com>
2023-01-30Rename ChaCha20::Seek -> Seek64 to clarify multiple of 64Pieter Wuille
2023-01-30Split ChaCha20 into aligned/unaligned variantsPieter Wuille
2022-12-24scripted-diff: Bump copyright headersHennadii Stepanov
-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT- Commits of previous years: - 2021: f47dda2c58b5d8d623e0e7ff4e74bc352dfa83d7 - 2020: fa0074e2d82928016a43ca408717154a1c70a4db - 2019: aaaaad6ac95b402fe18d019d67897ced6b316ee0
2022-09-23refactor: use <cstdlib> over stdlib.hfanquake
We currently use both. Consolidate on the former.
2019-12-30scripted-diff: Bump copyright of files changed in 2019MarcoFalke
-BEGIN VERIFY SCRIPT- ./contrib/devtools/copyright_header.py update ./ -END VERIFY SCRIPT-
2019-05-03Add ChaCha20 encryption option (XOR)Jonas Schnelli
2017-03-29Add ChaCha20Pieter Wuille
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