60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
#include "os_io_seproxyhal.h"
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#include "shared_context.h"
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#include "ui_callbacks.h"
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unsigned int io_seproxyhal_touch_signMessage_ok(__attribute__((unused)) const bagl_element_t *e) {
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uint8_t privateKeyData[INT256_LENGTH];
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uint8_t signature[100];
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cx_ecfp_private_key_t privateKey;
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uint32_t tx = 0;
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io_seproxyhal_io_heartbeat();
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os_perso_derive_node_bip32(CX_CURVE_256K1,
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tmpCtx.messageSigningContext.bip32Path,
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tmpCtx.messageSigningContext.pathLength,
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privateKeyData,
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NULL);
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io_seproxyhal_io_heartbeat();
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cx_ecfp_init_private_key(CX_CURVE_256K1, privateKeyData, 32, &privateKey);
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explicit_bzero(privateKeyData, sizeof(privateKeyData));
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unsigned int info = 0;
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io_seproxyhal_io_heartbeat();
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cx_ecdsa_sign(&privateKey,
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CX_RND_RFC6979 | CX_LAST,
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CX_SHA256,
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tmpCtx.messageSigningContext.hash,
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sizeof(tmpCtx.messageSigningContext.hash),
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signature,
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sizeof(signature),
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&info);
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explicit_bzero(&privateKey, sizeof(privateKey));
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G_io_apdu_buffer[0] = 27;
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if (info & CX_ECCINFO_PARITY_ODD) {
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G_io_apdu_buffer[0]++;
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}
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if (info & CX_ECCINFO_xGTn) {
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G_io_apdu_buffer[0] += 2;
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}
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format_signature_out(signature);
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tx = 65;
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G_io_apdu_buffer[tx++] = 0x90;
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G_io_apdu_buffer[tx++] = 0x00;
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reset_app_context();
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// Send back the response, do not restart the event loop
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io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, tx);
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// Display back the original UX
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ui_idle();
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return 0; // do not redraw the widget
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}
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unsigned int io_seproxyhal_touch_signMessage_cancel(__attribute__((unused))
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const bagl_element_t *e) {
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reset_app_context();
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G_io_apdu_buffer[0] = 0x69;
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G_io_apdu_buffer[1] = 0x85;
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// Send back the response, do not restart the event loop
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io_exchange(CHANNEL_APDU | IO_RETURN_AFTER_TX, 2);
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// Display back the original UX
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ui_idle();
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return 0; // do not redraw the widget
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}
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