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https://github.com/trezor/trezor-firmware.git
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chore(legacy): drop unused ECIES code
[no changelog]
This commit is contained in:
Pavol Rusnak
parent
d656f88572
commit
3488138285
@ -254,129 +254,6 @@ int cryptoMessageVerify(const CoinInfo *coin, const uint8_t *message,
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return 0;
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}
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/* ECIES disabled
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int cryptoMessageEncrypt(curve_point *pubkey, const uint8_t *msg, size_t
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msg_size, bool display_only, uint8_t *nonce, size_t *nonce_len, uint8_t
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*payload, size_t *payload_len, uint8_t *hmac, size_t *hmac_len, const uint8_t
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*privkey, const uint8_t *address_raw)
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{
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if (privkey && address_raw) { // signing == true
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HDNode node = {0};
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payload[0] = display_only ? 0x81 : 0x01;
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uint32_t l = ser_length(msg_size, payload + 1);
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memcpy(payload + 1 + l, msg, msg_size);
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memcpy(payload + 1 + l + msg_size, address_raw, 21);
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hdnode_from_xprv(0, 0, 0, privkey, privkey, SECP256K1_NAME,
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&node); if (cryptoMessageSign(&node, msg, msg_size, payload + 1 + l + msg_size +
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21) != 0) { return 1;
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}
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*payload_len = 1 + l + msg_size + 21 + 65;
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} else {
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payload[0] = display_only ? 0x80 : 0x00;
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uint32_t l = ser_length(msg_size, payload + 1);
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memcpy(payload + 1 + l, msg, msg_size);
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*payload_len = 1 + l + msg_size;
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}
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// generate random nonce
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curve_point R = {0};
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bignum256 k = {0};
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if (generate_k_random(&secp256k1, &k) != 0) {
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return 2;
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}
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// compute k*G
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scalar_multiply(&secp256k1, &k, &R);
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nonce[0] = 0x02 | (R.y.val[0] & 0x01);
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bn_write_be(&R.x, nonce + 1);
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*nonce_len = 33;
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// compute shared secret
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point_multiply(&secp256k1, &k, pubkey, &R);
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uint8_t shared_secret[33] = {0};
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shared_secret[0] = 0x02 | (R.y.val[0] & 0x01);
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bn_write_be(&R.x, shared_secret + 1);
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// generate keying bytes
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uint8_t keying_bytes[80] = {0};
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uint8_t salt[22 + 33] = {0};
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memcpy(salt, "Bitcoin Secure Message", 22);
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memcpy(salt + 22, nonce, 33);
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pbkdf2_hmac_sha256(shared_secret, 33, salt, 22 + 33, 2048, keying_bytes,
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80);
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// encrypt payload
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aes_encrypt_ctx ctx = {0};
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aes_encrypt_key256(keying_bytes, &ctx);
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aes_cfb_encrypt(payload, payload, *payload_len, keying_bytes + 64,
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&ctx);
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// compute hmac
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uint8_t out[32] = {0};
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hmac_sha256(keying_bytes + 32, 32, payload, *payload_len, out);
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memcpy(hmac, out, 8);
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*hmac_len = 8;
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return 0;
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}
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int cryptoMessageDecrypt(curve_point *nonce, uint8_t *payload, size_t
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payload_len, const uint8_t *hmac, size_t hmac_len, const uint8_t *privkey,
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uint8_t *msg, size_t *msg_len, bool *display_only, bool *signing, uint8_t
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*address_raw)
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{
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if (hmac_len != 8) {
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return 1;
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}
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// compute shared secret
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curve_point R = {0};
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bignum256 k = {0};
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bn_read_be(privkey, &k);
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point_multiply(&secp256k1, &k, nonce, &R);
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uint8_t shared_secret[33] = {0};
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shared_secret[0] = 0x02 | (R.y.val[0] & 0x01);
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bn_write_be(&R.x, shared_secret + 1);
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// generate keying bytes
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uint8_t keying_bytes[80] = {0};
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uint8_t salt[22 + 33] = {0};
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memcpy(salt, "Bitcoin Secure Message", 22);
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salt[22] = 0x02 | (nonce->y.val[0] & 0x01);
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bn_write_be(&(nonce->x), salt + 23);
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pbkdf2_hmac_sha256(shared_secret, 33, salt, 22 + 33, 2048, keying_bytes,
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80);
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// compute hmac
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uint8_t out[32] = {0};
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hmac_sha256(keying_bytes + 32, 32, payload, payload_len, out);
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if (memcmp(hmac, out, 8) != 0) {
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return 2;
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}
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// decrypt payload
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aes_encrypt_ctx ctx = {0};
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aes_encrypt_key256(keying_bytes, &ctx);
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aes_cfb_decrypt(payload, payload, payload_len, keying_bytes + 64, &ctx);
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// check first byte
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if (payload[0] != 0x00 && payload[0] != 0x01 && payload[0] != 0x80 &&
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payload[0] != 0x81) { return 3;
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}
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*signing = payload[0] & 0x01;
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*display_only = payload[0] & 0x80;
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uint32_t l = 0; uint32_t o = 0;
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l = deser_length(payload + 1, &o);
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if (*signing) {
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// FIXME: assumes a raw address is 21 bytes (also below).
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if (1 + l + o + 21 + 65 != payload_len) {
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return 4;
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}
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// FIXME: cryptoMessageVerify changed to take the address_type
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as a parameter. if (cryptoMessageVerify(payload + 1 + l, o, payload + 1 + l + o,
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payload + 1 + l + o + 21) != 0) { return 5;
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}
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memcpy(address_raw, payload + 1 + l + o, 21);
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} else {
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if (1 + l + o != payload_len) {
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return 4;
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}
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}
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memcpy(msg, payload + 1 + l, o);
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*msg_len = o;
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return 0;
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}
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*/
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const HDNode *cryptoMultisigPubkey(const CoinInfo *coin,
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const MultisigRedeemScriptType *multisig,
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uint32_t index) {
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@ -62,18 +62,6 @@ int cryptoMessageVerify(const CoinInfo *coin, const uint8_t *message,
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size_t message_len, const char *address,
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const uint8_t *signature);
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/* ECIES disabled
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int cryptoMessageEncrypt(curve_point *pubkey, const uint8_t *msg, size_t
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msg_size, bool display_only, uint8_t *nonce, size_t *nonce_len, uint8_t
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*payload, size_t *payload_len, uint8_t *hmac, size_t *hmac_len, const uint8_t
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*privkey, const uint8_t *address_raw);
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int cryptoMessageDecrypt(curve_point *nonce, uint8_t *payload, size_t
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payload_len, const uint8_t *hmac, size_t hmac_len, const uint8_t *privkey,
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uint8_t *msg, size_t *msg_len, bool *display_only, bool *signing, uint8_t
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*address_raw);
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*/
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const HDNode *cryptoMultisigPubkey(const CoinInfo *coin,
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const MultisigRedeemScriptType *multisig,
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uint32_t index);
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