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ChaCha20 implementation for encryption

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Add an implementation in 8051 assembler for the generation of a
ChaCha20 keystream and an encryption function using the keystream
in C.

A test function using the example from RFC7539 is provided in
chacha20_test.

Keys, nonce, and block counter and the pointers to the input plaintext,
its length and the output pointer are provided via a struct chacha20,
which also holds the working state of the ChaCha20 algorithm
This commit is contained in:
logicog committed 2026-09-23 17:57:14 +02:00
1 parent fa93340c24
commit e21ce4ce80
6 files changed
+616 -2
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machine.h
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@@ -18,6 +18,7 @@
// #define MACHINE_KP_9000_6XH_X2_V2_1
// #define MACHINE_KP_9000_6XHML_X2_V2_1
// #define MACHINE_KP_9000_6XHML_X2
// #define MACHINE_KP_9000_6XH_X
// #define MACHINE_KP_9000_9XH_X_EU
// #define MACHINE_KP_9000_9XHML_X_V2_2