Kaj SchittecatandClaude Opus 4.8
1f6409702c
First board lands. wadamesh builds the LVGL touch firmware as its own project, consuming the MeshCore core via lib_deps @ git tag (ALLFATHER-BV/MeshCore #v1.16.0-wada.0) — no vendored core in this repo. Output is byte-identical to the in-tree meshcomod build (delta = embedded build-path strings only). Contents: companion_radio app (MyMesh/main/DataStore), ui-touch LVGL UI, variants/heltec_v4 board glue, boards/heltec_v4.json, lv_conf, the bundled ed25519 lib, AsyncElegantOTA, partition table, and a flattened platformio.ini for env heltec_v4_tft_companion_radio_usb_tcp_touch. MeshCore-derived files (app glue) remain MIT; ui-touch is GPL — see NOTICE. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Signed-off-by: Kaj Schittecat <kaj@schittecat.com>
32 lines
828 B
C
32 lines
828 B
C
#include "ed_25519.h"
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#include "sha512.h"
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#include "ge.h"
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#include "sc.h"
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void ed25519_sign(unsigned char *signature, const unsigned char *message, size_t message_len, const unsigned char *public_key, const unsigned char *private_key) {
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sha512_context hash;
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unsigned char hram[64];
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unsigned char r[64];
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ge_p3 R;
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sha512_init(&hash);
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sha512_update(&hash, private_key + 32, 32);
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sha512_update(&hash, message, message_len);
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sha512_final(&hash, r);
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sc_reduce(r);
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ge_scalarmult_base(&R, r);
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ge_p3_tobytes(signature, &R);
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sha512_init(&hash);
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sha512_update(&hash, signature, 32);
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sha512_update(&hash, public_key, 32);
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sha512_update(&hash, message, message_len);
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sha512_final(&hash, hram);
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sc_reduce(hram);
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sc_muladd(signature + 32, hram, private_key, r);
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}
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