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25 lines
776 B
Go
25 lines
776 B
Go
package auth
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/hex"
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)
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// sha256Hex returns the lowercase hex-encoded SHA-256 hash of the input string.
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// Used to hash refresh tokens before storage — deterministic so we can hash on
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// insert and hash on lookup without storing the raw token.
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func sha256Hex(s string) string {
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h := sha256.Sum256([]byte(s))
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return hex.EncodeToString(h[:])
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}
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// HmacSHA256Hex computes HMAC-SHA256 of data with the given secret key and
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// returns the result as a lowercase hex string. Used for API key hashing —
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// fast and deterministic, allowing direct DB lookup by hash.
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func HmacSHA256Hex(data, secret string) string {
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mac := hmac.New(sha256.New, []byte(secret))
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mac.Write([]byte(data))
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return hex.EncodeToString(mac.Sum(nil))
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}
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