65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
#include "shared_context.h"
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#include "ui_callbacks.h"
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static const uint8_t const EIP_712_MAGIC[] = { 0x19, 0x01 };
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unsigned int io_seproxyhal_touch_signMessage712_v0_ok(const bagl_element_t *e) {
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uint8_t privateKeyData[32];
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uint8_t hash[32];
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uint8_t signature[100];
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uint8_t signatureLength;
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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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cx_keccak_init(&global_sha3, 256);
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cx_hash((cx_hash_t *)&global_sha3, 0, (uint8_t*)EIP_712_MAGIC, sizeof(EIP_712_MAGIC), NULL, 0);
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cx_hash((cx_hash_t *)&global_sha3, 0, tmpCtx.messageSigningContext712.domainHash,
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sizeof(tmpCtx.messageSigningContext712.domainHash), NULL, 0);
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cx_hash((cx_hash_t *)&global_sha3, CX_LAST, tmpCtx.messageSigningContext712.messageHash,
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sizeof(tmpCtx.messageSigningContext712.messageHash), hash, sizeof(hash));
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PRINTF("EIP712 hash to sign %.*H\n", 32, hash);
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io_seproxyhal_io_heartbeat();
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os_perso_derive_node_bip32(
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CX_CURVE_256K1, tmpCtx.messageSigningContext712.bip32Path,
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tmpCtx.messageSigningContext712.pathLength, privateKeyData, 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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os_memset(privateKeyData, 0, sizeof(privateKeyData));
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unsigned int info = 0;
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io_seproxyhal_io_heartbeat();
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signatureLength =
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cx_ecdsa_sign(&privateKey, CX_RND_RFC6979 | CX_LAST, CX_SHA256,
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hash,
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sizeof(hash), signature, sizeof(signature), &info);
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os_memset(&privateKey, 0, 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_signMessage712_v0_cancel(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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