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Mike Tolkachev

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31 commits1 monitored projects11 candidates1 high-risk analyses
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Blockstream JadeBlockstream31 commits11 candidates1 high risk
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Low 48 AI analysisMessage 62 · Adequate
BS BlockstreamBlockstream Jade BitcoinHardware wallets

rpc: annotate functions returning error codes to ensure they are checked

This commit adds compiler annotations (WARN_UNUSED_RESULT) to functions that return success/failure codes, so the compiler will warn if a caller ignores the result. It also fixes a few places where return values were being ignored, replaci…

Functions returning error/success codes annotated with WARN_UNUSED_RESULTCallers now check return values of rpc_get_bip32_path() and rpc_get_boolean()Use of default-value helpers (rpc_get_boolean_or) to ensure predictable behavior on missing fields
517075baby Mike Tolkachev+24−215 files
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BS BlockstreamBlockstream Jade BitcoinHardware wallets

rpc: add alternative typed getters with default values

This commit adds convenience functions that read settings from CBOR messages and return a default value if the setting is missing or invalid. It is a straightforward feature addition with no visible security bug.

23993a22by Mike Tolkachev+27−12 files
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Moderate 59 AI analysisMessage 35 · Opaque
BS BlockstreamBlockstream Jade BitcoinHardware wallets

assets: improve precision checking

This commit tightens how Blockstream Jade handles the 'precision' value in asset contracts for Liquid assets. Previously, a very large precision value could be accepted and later used to read past the end of an internal lookup table (POW_1…

Out-of-bounds read mitigation: bounds-checking of user-controlled precision before indexing fixed-size POW_10 arrayInteger truncation safety: explicit cast of validated precision to uint8_t after range checkCompile-time invariant enforcement: JADE_STATIC_ASSERT ties array size to ASSET_PRECISION_MAX
fd0f625dby Mike Tolkachev+13−13 files
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Informational 15 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

rpc: refactor app code to use getters with default values

This commit is a straightforward code cleanup that replaces verbose 'read this optional value, or leave the default' patterns with shorter helper functions that do the same thing. There is no change in behavior and no security issue visibl…

b6a07147by Mike Tolkachev+22−348 files
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Low 46 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

configs: enable overall stack smashing protection for production devices

This commit strengthens a security guardrail on Blockstream Jade hardware wallets by turning on the most thorough stack-smashing protection for production builds. Stack smashing is a common way attackers try to take control of a device by …

Hardening: stack canary coverage expanded from STRONG to ALLTarget: production hardware-wallet firmware buildsScope: all three supported production hardware variants (Jade v1.1, v2, v2c)
0d8422daby Mike Tolkachev+3−33 files
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Low 26 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

assets: explicitly allow precision field to be optional

This small change makes the 'precision' number in asset metadata optional, defaulting to 0 if missing. Previously, the code may have treated a missing precision field as a failure. The patch uses a wrapper that explicitly ignores any error…

Use of IGNORE_RESULT macro suppresses return-value checkingOptional field handling change in asset contract parsingPotential masking of CBOR parsing errors for precision field
36f997b9by Mike Tolkachev+2−11 file
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Low 36 AI analysisMessage 74 · Adequate
BS BlockstreamBlockstream Jade BitcoinHardware wallets

build: annotate functions returning error codes to ensure they are checked

This commit is a preventive build-hardening change. It adds compiler annotations (WARN_UNUSED_RESULT) to many functions that return success/failure codes, so the compiler will warn if a caller ignores the result. The goal is to catch futur…

Compiler annotation added to enforce checking of error-returning functionsNo specific vulnerability fixed in the diffNo functional code changes or call-site fixes included
909a89aaby Mike Tolkachev+215−15225 files
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Low 26 AI analysisMessage 62 · Adequate
BS BlockstreamBlockstream Jade BitcoinHardware wallets

build: add build support for enforcing return codes are checked

This commit adds compiler flags and helper macros to make the build fail whenever a function's return value is ignored without explicit intent. It is a hardening change, not a fix for a specific known bug. By enforcing that programmers che…

Compiler hardening flag added (-Werror=unused-result)New macros to annotate and explicitly ignore function return valuesNo specific vulnerable call site patched in this commit
bb2e53d6by Mike Tolkachev+21−03 files
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Informational 22 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

otp: show error on invalid issuer, share logging strings

This commit tightens error handling when decoding the 'issuer' field of an OTP (one-time password) setup URI. Previously, a malformed issuer string could fail to decode silently; now the device shows an error and cancels the operation inst…

Input validation added for OTP URI issuer fieldSilent failure on malformed URL-decoding replaced with explicit error returnDebug assertion added for label/issuer URL-decoding in UI display path
66c945f2by Mike Tolkachev+9−52 files
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Low 46 AI analysisMessage 45 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

identity: add identity string validation

This commit adds a safety check to Blockstream Jade's 'sign identity' feature. Before the change, the device would accept any identity string a connected app sent. Now it rejects identities that contain non-printable or unusual characters.…

Input validation added to a signing/identity processNew length-bounded string helper reduces reliance on null-terminationRejection of non-printable characters in user-presented identity string
53752b98by Mike Tolkachev+22−02 files
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Low 42 AI analysisMessage 28 · Opaque
BS BlockstreamBlockstream Jade BitcoinHardware wallets

psbt: fix path size

This commit fixes a small but meaningful bug in how Jade, a hardware wallet, reads key paths from Bitcoin PSBT data. The code was passing the byte size of a buffer when it should have passed the number of 32-bit entries. Depending on how t…

Buffer-size semantic mismatch in security-critical PSBT parsingUse of sizeof() on uint32_t array where element count is expectedCode path involved in 2of3 multisig recovery key identification
9e0c3747by Mike Tolkachev+2−21 file
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Moderate 61 AI analysisMessage 35 · Opaque
BS BlockstreamBlockstream Jade BitcoinHardware wallets

url: improve bounds checking

This commit tightens bounds checks in URL encoding/decoding functions used in Blockstream Jade, a hardware wallet. The changes fix potential off-by-one/out-of-bounds memory reads and writes when handling percent-encoded characters. Because…

Bounds-check rewrite in URL decoder to prevent out-of-bounds reads before percent-decodingCast to unsigned char moved into isxdigit() to avoid undefined behavior with signed char inputsDestination bounds checks in URL encoder changed from pointer-subtraction form to remaining-space form, mitigating possible underflow/wrap
c045aeacby Mike Tolkachev+5−71 file
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Moderate 59 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

sign_psbt: add early reject on wrong genesis blockhash

This commit fixes a bug in the Blockstream Jade hardware wallet's PSBT (Partially Signed Bitcoin Transaction) signing code. Previously, when the transaction's genesis block hash did not match the expected network, the code set an error mes…

Missing return in error path allows execution to continue after validation failureCross-network genesis hash mismatch not enforced as a hard failurePSBT signing logic accepts mismatched network parameters
56e130b0by Mike Tolkachev+1−01 file
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Low 42 AI analysisMessage 45 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

descriptor: improve validation of child key path

This commit tightens how a Bitcoin hardware wallet (Blockstream Jade) validates the length of a child key path string before copying it into a fixed-size buffer. The change adds an explicit length check and uses the already-computed length…

Fixed-size buffer write (strcpy into signer->path_str)New explicit length assertion before copyDescriptor parsing path, a common attack surface for wallet firmware
2fad63e7by Mike Tolkachev+3−11 file
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Low 42 AI analysisMessage 45 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

main: fix error handling during PIN change

This commit fixes a bug in the PIN-change flow on Blockstream Jade hardware wallets. Previously, if re-encrypting the wallet keys with a new PIN failed, or if the user abandoned the PIN change, the code did not jump to cleanup as intended.…

Missing error-path control flow in cryptographic key handlingPotential use of stale or partially initialized key material after PIN-change failureCleanup bypass in sensitive authentication code path
64c30823by Mike Tolkachev+2−01 file
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Low 42 AI analysisMessage 45 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

main: fix error handling for debug handshake

This commit fixes a missing 'goto cleanup' after a failed attempt to save encrypted key data during a debug handshake. Without the fix, the code would continue running after reporting an error, potentially leaving sensitive key material in…

Missing error-path termination leading to fall-through after a security-critical failurePotential failure to clean up sensitive key material after flash storage errorAssertion on keychain state could be reached with inconsistent state
7fb5e90eby Mike Tolkachev+1−01 file
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Moderate 59 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

main: ensure seed is present before completing OTP registration

This commit fixes a bug in the Blockstream Jade hardware wallet's one-time-password (OTP) registration feature. Previously, if no wallet seed existed, the device would log an error and show a reset message, but then accidentally continue w…

Missing error-path termination (fall-through after error reporting)State validation bypass possible before fixOTP secret persistence after seed-absence error
0d6536dfby Mike Tolkachev+1−01 file
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Low 42 AI analysisMessage 35 · Opaque
BS BlockstreamBlockstream Jade BitcoinHardware wallets

multisig: fix error handling

This commit fixes two error-handling bugs in Blockstream Jade's multisignature wallet code. In one case, an invalid multisig wallet record was detected but the function kept running instead of returning immediately, which could lead to usi…

Missing return after setting error condition in validation pathUnchecked return value from security-relevant path validationMultisignature wallet data integrity check bypass
427c2083by Mike Tolkachev+6−12 files
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Low 33 AI analysisMessage 50 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

main: check MAC address obtained successfully from efuse

This commit adds a safety check to ensure the device can read its unique hardware identifier (MAC address) from a special chip memory area (efuse) before continuing startup. Previously, the code read the MAC address but ignored whether it …

Unconditional failure handling added for security-relevant identifier readDevice-unique identity (MAC) now validated before useDefensive hardening of boot-time initialization
5ffaacc6by Mike Tolkachev+1−11 file
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Informational 18 AI analysisMessage 45 · Thin
BS BlockstreamBlockstream Jade BitcoinHardware wallets

display: add check for screen power on status

This tiny change makes the device firmly check that the screen successfully powers on during startup, rather than silently continuing if something goes wrong. It is a defensive hardening fix, not a clear-cut vulnerability patch. The commit…

Unchecked return value now checked with JADE_ASSERTDefensive hardening in display initialization pathNo mention of vulnerability, exploit, or security issue in commit message
1883d343by Mike Tolkachev+1−11 file
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