51 lines
1.3 KiB
Go
51 lines
1.3 KiB
Go
package store
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import (
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"crypto/hmac"
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"crypto/sha1"
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"fmt"
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"hash/crc64"
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"log"
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"strconv"
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)
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// User holds user-related info
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type User struct {
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Name string `json:"name"`
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ID string `json:"id"`
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Picture string `json:"picture"`
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Admin bool `json:"admin"`
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Blocked bool `json:"block,omitempty"`
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IP string `json:"ip,omitempty"`
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}
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// HashIP replace IP field with hashed hmac
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func (u *User) HashIP(secret string) {
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hashVal := func(val string) string {
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if _, err := strconv.ParseUint(val, 16, 64); err == nil || val == "" {
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return val // already hashed
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}
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key := []byte(secret)
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h := hmac.New(sha1.New, key)
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if _, err := h.Write([]byte(val)); err != nil {
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log.Printf("[WARN] can't hash ip, %s", err)
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}
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return fmt.Sprintf("%x", h.Sum(nil))
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}
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u.IP = hashVal(u.IP)
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}
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// EncodeID hashes id to sha1. The function intentionally left outside of User struct because in some cases
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// we need hashing for parts of id, in some others hashing for non-User values.
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func EncodeID(id string) string {
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h := sha1.New()
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if _, err := h.Write([]byte(id)); err != nil {
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// fail back to crc64
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log.Printf("[WARN] can't hash id %s, %s", id, err)
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return fmt.Sprintf("%x", crc64.Checksum([]byte(id), crc64.MakeTable(crc64.ECMA)))
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}
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return fmt.Sprintf("%x", h.Sum(nil))
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}
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