邹方成
81e2fb5a75
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新增随机种子生成与验证逻辑，包括： 1. 添加随机承诺生成接口 2. 实现抽奖执行与验证流程 3. 新增批量用户创建与删除功能 4. 添加抽奖收据记录表 5. 完善配置管理与错误码 新增测试用例验证随机算法正确性
58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package activity
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/binary"
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"encoding/hex"
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"bindbox-game/configs"
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)
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func masterKey() []byte {
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s := configs.Get().Random.CommitMasterKey
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if s == "" {
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return nil
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}
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b, err := hex.DecodeString(s)
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if err != nil || len(b) == 0 {
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return nil
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}
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return b
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}
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func deriveMask(key []byte, issueID int64, version int32) []byte {
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m := hmac.New(sha256.New, key)
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buf := make([]byte, 12)
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binary.BigEndian.PutUint64(buf[:8], uint64(issueID))
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binary.BigEndian.PutUint32(buf[8:12], uint32(version))
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m.Write(buf)
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sum := m.Sum(nil)
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return sum[:32]
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}
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func maskSeed(master []byte, issueID int64, version int32) ([]byte, bool) {
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key := masterKey()
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if key == nil {
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return master, false
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}
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ks := deriveMask(key, issueID, version)
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out := make([]byte, len(master))
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for i := range master {
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out[i] = master[i] ^ ks[i%len(ks)]
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}
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return out, true
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}
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func unmaskSeed(enc []byte, issueID int64, version int32) []byte {
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key := masterKey()
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if key == nil {
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return enc
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}
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ks := deriveMask(key, issueID, version)
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out := make([]byte, len(enc))
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for i := range enc {
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out[i] = enc[i] ^ ks[i%len(ks)]
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}
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return out
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} |