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trezor-mcu
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rework SignIdentity signing

This commit is contained in:
Pavol Rusnak 2015-07-04 23:34:26 +02:00
parent eaf209d999
commit e4d86a49ab
1 changed files with 7 additions and 15 deletions
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22
firmware/fsm.c
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@ -697,26 +697,18 @@ void fsm_msgSignIdentity(SignIdentity *msg)
} }
} }
bool sign_ssh = false; bool sign_ssh = msg->identity.has_proto && (strcmp(msg->identity.proto, "ssh") == 0);
if (msg->identity.has_proto) {
sign_ssh = (strcmp(msg->identity.proto, "ssh") == 0);
}
uint8_t message_bytes[256 + 256];
memcpy(message_bytes, msg->challenge_hidden.bytes, msg->challenge_hidden.size);
int message_size = msg->challenge_hidden.size;
int result = 0; int result = 0;
if (sign_ssh) { if (sign_ssh) { // SSH does not sign visual challenge
// SSH doesn't sign visual challenge.
layoutProgressSwipe("Signing SSH", 0); layoutProgressSwipe("Signing SSH", 0);
result = sshMessageSign(message_bytes, message_size, node->private_key, resp->signature.bytes); result = sshMessageSign(msg->challenge_hidden.bytes, msg->challenge_hidden.size, node->private_key, resp->signature.bytes);
} else { } else {
const int len = strlen(msg->challenge_visual); uint8_t digest[64];
memcpy(message_bytes + message_size, msg->challenge_visual, len); sha256_Raw(msg->challenge_hidden.bytes, msg->challenge_hidden.size, digest);
message_size = message_size + len; sha256_Raw((const uint8_t *)msg->challenge_visual, strlen(msg->challenge_visual), digest + 32);
layoutProgressSwipe("Signing", 0); layoutProgressSwipe("Signing", 0);
result = cryptoMessageSign(message_bytes, message_size, node->private_key, resp->signature.bytes); result = cryptoMessageSign(digest, 64, node->private_key, resp->signature.bytes);
} }
if (result == 0) { if (result == 0) {