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Adam Tucker

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81 commits1 monitored projects8 candidates1 high-risk analyses
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Keystone 3 firmwareKeystone81 commits8 candidates1 high risk
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Low 37 AI analysisMessage 45 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

Fix Zcash wallet preparation on unlock

This commit fixes a bug in a helper function that checks whether a text string is a valid hexadecimal value of the expected length. The changelog frames the user-visible fix as 'preventing Zcash public information from being regenerated on…

Input validation hardening in a shared utility functionChangelog describes a Zcash wallet preparation/unlock behavior fixPotential off-by-one length check corrected
dd034199by Adam Tucker+8−44 files
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Informational 3 AI analysisMessage 45 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

Use released UR crates 1.0.8

This commit simply switches two software building blocks (called 'crates') from a development Git snapshot to a published release version (1.0.8) on the official Rust package registry. The change itself does not add, remove, or modify any …

fa0add39by Adam Tucker+8−102 files
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Informational 17 AI analysisMessage 68 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

Preserve Zcash account firmware version (#37)

This commit is a small, non-security code change. It updates a Zcash wallet test to verify that the firmware version string is preserved when account data is encoded and decoded, and it switches two Rust library dependencies from the publi…

Dependency source changed from crates.io to a third-party Git repository (valargroup/keystone-sdk-rust)No mention of vulnerability, CVE, security fix, or researcher attribution in commit message or diffChange is limited to a unit test assertion and dependency source pinning
20d7ea2dby Adam+11−73 files
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Low 28 AI analysisMessage 45 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

Preserve PCZT v1 response encoding

This commit changes how the Keystone hardware wallet handles Zcash PCZT (partially-created transaction) files. Previously, after checking and signing a transaction, the device always returned the result in the newer v2 format. Now it remem…

Behavioral change in serialization format selectionNew parsing helper reads wire version from raw bytesTest coverage added for v1 preservation
acf3611aby Adam Tucker+136−245 files
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Informational 12 AI analysisMessage 67 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

test(zcash): harden v1 PCZT end-to-end coverage

This commit only adds and updates test code for the Zcash PCZT (Partially-Created Zcash Transaction) feature. It hardens end-to-end test coverage for version 1 PCZTs that include both transparent and Orchard shielded inputs/outputs. There …

No production code changesTest-only commitAdds defensive assertions for signature finalization behavior
2c54cb53by Adam Tucker+177−363 files
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Informational 15 AI analysisMessage 62 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

refactor(zcash): use shielded pool display directly

This commit is a minor code cleanup in the Zcash shielded-transaction handling code. It removes temporary variables named `pool_label` and instead uses the existing `pool` value directly when building error messages. There is no change to …

9074e087by Adam Tucker+22−334 files
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Moderate 60 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): validate transparent PCZT formats

This commit tightens validation for Zcash transaction formats (PCZT) on the Keystone 3 hardware wallet. Previously, the firmware only checked that a transaction was version 6 or higher and not v6 specifically, plus that it had no Sapling o…

Input-validation hardening for transaction parsing/signingExplicit allow-listing of supported (tx_version, version_group_id, orchard_revision) tuplesNew negative test for v6 + Nu6 branch rejection
0d02c355by Adam Tucker+80−22 files
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Informational 15 AI analysisMessage 67 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

test(zcash): restore v1 PCZT end-to-end coverage

This commit only adds and updates test code for the Zcash cryptocurrency support in the Keystone 3 firmware. It restores an end-to-end test that exercises version 1 PCZT (Partially Created Zcash Transaction) handling for older Orchard tran…

75b69553by Adam Tucker+74−82 files
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Informational 11 AI analysisMessage 80 · Strong
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

build(zcash): use released protocol crates

This commit is a routine build update for the Zcash parts of the Keystone 3 firmware. It switches several Rust libraries from using specific GitHub revisions to using published versions from crates.io, and bumps a few version numbers. Ther…

Dependency source changed from Git revisions to crates.io releasesPre-release Zcash crate versions bumped to stable releasesur-registry pinned to a newer SDK revision
ef5ad05fby Adam Tucker+37−454 files
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Informational 13 AI analysisMessage 72 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

test(zcash): restore transparent-output PCZT coverage

This commit only adds a new automated test for the Zcash cryptocurrency code. It restores test coverage to make sure that an Orchard (privacy-focused) transaction with a regular transparent output is still accepted by the validation logic.…

4bdf2148by Adam Tucker+44−01 file
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Low 37 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): allow transparent-only V6 PCZTs

This commit changes how Keystone's Zcash transaction handling treats version 6 (V6) PCZTs. Previously, all V6 Zcash transactions were rejected in the non-cypherpunk (transparent-only) code path. The patch now allows V6 transactions as long…

Guard relaxation: V6 PCZTs no longer blanket-rejected in transparent-only buildsBoundary enforcement remains for shielded Sapling/Orchard/Ironwood contentUnknown transaction versions still rejected
ba4ecf28by Adam Tucker+127−954 files
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Moderate 59 AI analysisMessage 62 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): validate empty shielded bundle balances

This commit adds a validation check for Zcash PCZT (Partially Created Zcash Transaction) parsing in the Keystone hardware wallet firmware. It ensures that if an Orchard or Ironwood shielded bundle contains no actions, its declared value su…

Input validation added for empty shielded bundle value_sumPotential balance-consistency issue in Zcash PCZT handlingTest case demonstrates malformed PCZT rejection
5e05a21aby Adam Tucker+99−01 file
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Moderate 57 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): require an owned singleton input

This commit changes how the Keystone hardware wallet validates Zcash PCZT (partially-created transaction) files before signing. Previously, under a 'batch' policy it required at least one shielded input belonging to the wallet. After the c…

Change in transaction ownership validation before signingNew condition combines empty shielded actions with absence of transparent inputs to reject PCZTTest renamed to expect rejection at check phase for foreign seed
4277d422by Adam Tucker+49−262 files
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Informational 14 AI analysisMessage 62 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

refactor(zcash): simplify unsupported PCZT helpers

This is a simple code cleanup: three internal helper functions in the Zcash PCZT handling code are renamed to remove the word 'legacy' from their names. The actual behavior and security checks stay exactly the same. There is no functional …

0f0dc78aby Adam Tucker+6−63 files
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Informational 15 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

refactor(zcash): display shielded pool names

This commit is a small code cleanup in the Zcash transaction handling code. It replaces a custom `label()` method on the `ShieldedPool` type with Rust's standard `Display` trait, so the pool name prints the same way in error messages. Ther…

83ac1e21by Adam Tucker+16−194 files
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Low 42 AI analysisMessage 62 · Adequate
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): defer checked batch cleanup after signing

This patch changes when a Zcash batch signing screen frees a sensitive internal data structure. Instead of destroying the data immediately when the page is cleared, it now schedules the cleanup to run after the signing operation has finish…

Use-after-free / premature-free risk in cryptographic signing pathAsync deferred cleanup introduced to avoid race with FIFO signing taskInline comment explicitly describes security-relevant ordering constraint
3b8995faby Adam Tucker+32−11 file
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Low 35 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): initialize batch parse fingerprint

This commit fixes a small but meaningful bug in the Keystone hardware wallet's Zcash batch transaction screen. A 32-byte fingerprint buffer (`sfp`) was used without being initialized to zero. The code then fills it via `GetZcashSFP`, but i…

Uninitialized local buffer used for cryptographic/identity fingerprintPotential information disclosure or verification bypass if helper function fails partiallyFix pattern is a one-line initialization, indicating a partial/spot fix rather than systemic audit
56df2725by Adam Tucker+1−11 file
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Low 33 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): guard batch refresh display state

This is a small, defensive fix in the Zcash batch transaction screen of a Keystone hardware wallet. It adds a check that a UI display object actually exists before continuing to refresh the screen. Without the guard, the refresh function c…

Null-pointer guard added to UI refresh functionPotential denial-of-service/crash hardening in firmware UI pathNo explicit security claim or CVE referenced in commit
c634f1caby Adam Tucker+1−11 file
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Moderate 59 AI analysisMessage 57 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

fix(zcash): size UFVK buffers for terminators

This commit fixes a buffer sizing bug in the Keystone hardware wallet's Zcash support. The code previously treated the maximum string length and the buffer size as the same number, leaving no guaranteed room for the null terminator at the …

Off-by-one buffer sizing for null terminator in Zcash UFVK handlingUse of string-length constant instead of buffer-size constant in strcpy_s and memset_s callsInconsistent buffer declarations across account manager and GUI code
5f158dd3by Adam Tucker+14−136 files
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Informational 18 AI analysisMessage 45 · Thin
KS KeystoneKeystone 3 firmware BitcoinHardware wallets

Set Zcash batch limit to 40

This commit simply raises the maximum number of Zcash transactions that can be processed in one batch from 35 to 40. It updates a constant, the matching documentation, and a unit test. There is no indication of a security vulnerability bei…

7fd64609by Adam Tucker+3−32 files
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