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goyacodedevutils-yahash

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UpdatedJuly 3, 2026 at 23:39

Generic helper to build salted, optionally time-windowed hashes (e.g. short-lived tokens or request signatures) around any hash function. Use instead of hand-rolling HMAC/token expiry logic.

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YaCodeDev

YaCodeDev/GoYaCodeDevUtils

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Software DevelopersComputer and Mathematical Occupations·SOC 15-1252

SKILL.md

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name	goyacodedevutils-yahash
description	Generic helper to build salted, optionally time-windowed hashes (e.g. short-lived tokens or request signatures) around any hash function. Use instead of hand-rolling HMAC/token expiry logic.

yahash Skill

Import path: github.com/YaCodeDev/GoYaCodeDevUtils/yahash.

Generic helper to build salted, optionally time-windowed hashes (e.g. short-lived tokens or request signatures) using any user-supplied hash function.

Key API

HashableType = valueparser.ParsableType.
HashFunc[I HashableType, O comparable] func(data I, args ...I) O.
Hash[I, O] struct; NewHash[I, O](hasher HashFunc[I, O], secret I, stepInterval time.Duration, backStepCount uint16) Hash[I, O].
Methods: Hash(data I, args ...I) O, HashWithTime(t time.Time, args ...I) O, ValidateWithoutTime(expected O, data I, args ...I) bool, Validate(expected O, args ...I) bool, ValidateWithCustomBackStepCount(expected O, backStepCount uint16, args ...I) bool.
Ready-made hash funcs: FNVStringToInt64(data string, args ...string) int64, FNVStringToInt32(...) int32.

Usage Notes

secret is auto-appended as the last arg to every Hash()/HashWithTime() call — do not pass it manually.
stepInterval < 1s is silently promoted to 1s. Validate checks the current time window plus backStepCount previous windows, for clock-drift/latency tolerance.
Depends on valueparser (for HashWithTime's timestamp-to-I conversion). The zero value is not usable — always construct with NewHash.

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name	goyacodedevutils-yahash
description	Generic helper to build salted, optionally time-windowed hashes (e.g. short-lived tokens or request signatures) around any hash function. Use instead of hand-rolling HMAC/token expiry logic.

yahash Skill

Import path: github.com/YaCodeDev/GoYaCodeDevUtils/yahash.

Generic helper to build salted, optionally time-windowed hashes (e.g. short-lived tokens or request signatures) using any user-supplied hash function.

Key API

HashableType = valueparser.ParsableType.
HashFunc[I HashableType, O comparable] func(data I, args ...I) O.
Hash[I, O] struct; NewHash[I, O](hasher HashFunc[I, O], secret I, stepInterval time.Duration, backStepCount uint16) Hash[I, O].
Methods: Hash(data I, args ...I) O, HashWithTime(t time.Time, args ...I) O, ValidateWithoutTime(expected O, data I, args ...I) bool, Validate(expected O, args ...I) bool, ValidateWithCustomBackStepCount(expected O, backStepCount uint16, args ...I) bool.
Ready-made hash funcs: FNVStringToInt64(data string, args ...string) int64, FNVStringToInt32(...) int32.

Usage Notes

secret is auto-appended as the last arg to every Hash()/HashWithTime() call — do not pass it manually.
stepInterval < 1s is silently promoted to 1s. Validate checks the current time window plus backStepCount previous windows, for clock-drift/latency tolerance.
Depends on valueparser (for HashWithTime's timestamp-to-I conversion). The zero value is not usable — always construct with NewHash.