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Peter Jaško

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9 commits1 monitored projects4 candidates0 high-risk analyses
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Trezor firmwareTrezor9 commits4 candidates0 high risk
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Low 32 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(cardano): stop hashing in message signing

This commit removes the option to sign a hash of a Cardano message instead of the message itself. The device now always signs the actual message payload directly, up to a size limit. This is a feature/API change rather than a fix for an ac…

Removed hash-then-sign mode for Cardano message signingFirmware now signs raw message payload instead of a hashPayload size capped at MAX_CHUNK_SIZE and only one chunk accepted
0e71c8daby Peter Jaško+80−19912 files
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Low 28 AI analysisMessage 85 · Strong
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(cardano): Show path, address params and longer payload chunk

This commit improves the Cardano message-signing feature on Trezor hardware wallets by showing users more details on the device screen before signing. It displays the signing path, the address parameters (if provided), and a larger chunk o…

UI hardening: more data shown to user before signingPath validation hardening: validate_path against keychain and allow mint pathsAddress parameter confirmation added for message signing
dd20dc5eby Peter Jaško+91−324 files
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Informational 16 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

chore(cardano): changes after rebase

This commit is a routine cleanup after merging (rebasing) other Cardano code changes. It updates the Cardano message-signing flow to use newer internal APIs (sessions instead of raw clients, and a separate SLIP-21 keychain argument) and re…

2427d232by Peter Jaško+41−375 files
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Informational 15 AI analysisMessage 47 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

fix: changelog formatting

This commit only adds a missing period to two changelog entries describing a new Cardano feature. There are no code changes and no security relevance.

91f8c85aby Peter Jaško+2−22 files
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Low 29 AI analysisMessage 77 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(cardano): Change display_ascii flag to prefer_hex_display

This commit renames and slightly changes a Cardano message-signing display option. Previously, the host had to explicitly request ASCII display, and the device would reject payloads that were not clean, readable ASCII. Now the host can ask…

UI display-mode flag renamed and semantics invertedPrevious hard error on non-unambiguous ASCII removed; behavior now falls back to hex displayNo cryptographic, parsing, or authorization bypass changes observed
13f216afby Peter Jaško+87−9011 files
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Low 28 AI analysisMessage 47 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(cardano): Message signing

This commit adds a new feature to Trezor hardware wallets: the ability to sign arbitrary Cardano messages. It introduces new protocol messages, device firmware code to handle signing, and client libraries to use the feature. The signing pr…

New signing surface added to Cardano appUser confirmation required before signingPayload size and ASCII ambiguity validation present
4dcfaf18by Peter Jaško+2100−20825 files
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Informational 20 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

fix(cardano): Return pubkey

This commit adds the public key to the Cardano message-signing response. It is a feature enhancement for software wallets, not a fix for a vulnerability. There is no security defect in the change itself.

No vulnerability pattern observedFeature addition: return additional public-key data in signing responseRequired protobuf field addition is a wire-format breaking change for consumers
389e1ebaby Peter Jaško+127−477 files
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Low 29 AI analysisMessage 62 · Adequate
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(cardano): replace chunking with length+offset

This commit rewrites how the Trezor device fetches the message payload during Cardano message signing. Instead of the host pushing fixed-size chunks to the device, the device now asks for a specific slice of data by sending a length and of…

Protocol redesign from push-chunking to pull-based length+offset data transferRemoval of the MAX_CHUNK_SIZE / 'Payload too long to sign' limit in firmwareAddition of bounds checks: offset+length <= payload_size and len(response.data) == chunk_length
adb9d194by Peter Jaško+409−44415 files
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Low 36 AI analysisMessage 57 · Thin
TZ TrezorTrezor firmware BitcoinHardware wallets

feat(cardano): reject probable hashes

This update makes Trezor's Cardano message-signing feature refuse to sign 28-byte payloads that look like cryptographic hashes. The goal is to prevent users from accidentally signing a hash of an unknown message, which could let an attacke…

New input-validation guard added to a signing pathHeuristic rejection of hash-length payloads to prevent signing blind hashesTest fixture added for the new failure mode
dde4ec8aby Peter Jaško+21−13 files
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