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Version: 0.2

Greenmask 0.2.27

Greenmask 0.2.27 was released on 2026-11-12. It fixes security vulnerabilities in dependencies, adds the common.timezone setting, and fixes transformers that could leave columns unmasked and more than twenty other transformer bugs. Some transformers now produce different values for the same input, see Changed output.

Security​

  • fix: update pgx to 5.12.0 for GHSA-95fj-3fxw-g62g: a connection that relies on require_auth or channel_binding=require without sslmode=verify-full could accept a server that skips authentication #551
  • fix: update golang.org/x/crypto to 0.58.0 (denial of service in ssh, used by the SSH storage) and golang.org/x/net to 0.62.0 (HTTP/2, used by the Azure storage) #557
  • fix: build with Go 1.26.11, which distrusts compromised intermediate certificates in crypto/x509

Changes​

Columns that could be left unmasked​

  • fix: RealAddress dumped the columns after a NULL keep_null column unmasked #509
  • fix: Dict with fail_not_matched: false and no default replaced an unmatched value with the original data #510
  • fix: in a table with a custom transformer, a when condition was evaluated while the previous transformer was still writing the row, so a transformer could run on the wrong rows #523

Features​

  • feat: add common.timezone (COMMON_TIMEZONE), the time zone in which dump and validate read timestamptz values, UTC by default. pgx 5.11 and later would otherwise read them in the time zone of the machine. External transformers built with the new pkg/toolkit use it too #551
  • feat: validate reports a missing column in a when condition; the dump used to fail on the first row #524
  • feat: RandomMac gets keep_null #512

Fixes​

  • fix: numeric values with more than 10000 digits after the decimal point failed to decode after the shopspring/decimal update
  • fix: RandomDate and RandomUnixTimestamp depended on the time zone of the machine and could leave the range; truncate to milliseconds and microseconds did nothing; RandomUnixTimestamp mixed up units #532
  • fix: NoiseDate ignored a static min and max alone, made the time part of ratios 1000 times larger and rejected equal ratios #530
  • fix: template functions randomInt and randomString excluded max, randomString used only part of the symbols, and equal bounds panicked #520
  • fix: Template and TemplateRecord panicked on an unknown column, ignored validate and broke .DecodeValue #515
  • fix: Json ignored error_not_exist for a static value, wrote invalid JSON for NULL input and lost precision of static numbers #519
  • fix: RandomCompany with engine: hash gave different companies for the same value; keep_null was ignored with the random engine #514
  • fix: Masking counted bytes instead of characters and could write invalid UTF-8 #518
  • fix: RandomIp generated addresses outside a subnet with host bits or a leading zero byte #517
  • fix: RandomEmail rejected RFC 5322 characters in the original local part #537. Closes #536
  • fix: RandomString, RandomChoice and RandomMac panicked on invalid parameters or NULL #511 #513 #512
  • fix: RandomCCNumber no longer accepts int4, which cannot hold its output #527
  • fix: Hash accepts sha3-256 #529
  • fix: Replace and RegexpReplace can be used with apply_for_references #526
  • fix: correct NOT NULL warnings for HashedPassword, Dict and RandomChoice #528
  • fix: a dynamic parameter default for NULL could change between rows #525
  • fix: RandomPerson read one generator byte more than it requested; output is unchanged #516
  • fix: subset with polymorphic virtual references could drop valid rows #538. Closes #396
  • change: pgx 5.11 parses postgres:// connection URIs exactly as libpq does, see the pgx changelog #551

Documentation and build​

  • docs: document install.sh, validation severities, when exceptions and keep_null defaults #508
  • chore: configure Dependabot and update GitHub Actions and Go dependencies #539 #540 #541 #542 #543 #544 #545 #553 #554 #555 #556 #557
  • ci: create the release draft before uploading the binaries #507

Changed output​

The same input gives a different value, also with engine: hash, in these cases:

  • timestamptz values when the PostgreSQL session or the machine was not in UTC: truncate in NoiseDate and template date functions now work in common.timezone, and NoiseDate with engine: hash changes once
  • RandomDate and RandomUnixTimestamp on a machine not in UTC
  • NoiseDate with a static min, max alone or ratios with a time part
  • template functions randomInt and randomString
  • RandomCompany with engine: hash, Masking of multi-byte text, RandomIp with a non-aligned subnet, Json with large static numbers
  • the unmasked-column fixes above

RandomString, RandomChoice and RandomCCNumber configurations and when conditions that used to panic or fail on restore are now validation errors.

Full Changelog: v0.2.26...v0.2.27​

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