429Enjoyer
98 lines
2.2 KiB
Go
98 lines
2.2 KiB
Go
package backend
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/sha256"
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"fmt"
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"net/http"
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"strings"
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"sync"
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)
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var (
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communityAPIKeyOnce sync.Once
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communityAPIKey string
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communityAPIKeyErr error
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)
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var communityAPIKeySeedParts = [][]byte{
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[]byte("spotif"),
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[]byte("lac:co"),
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[]byte("mmunity:apikey:v1"),
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}
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var communityAPIKeyAAD = []byte("spotiflac|community|apikey|v1")
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var communityAPIKeyNonce = []byte{
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0x20, 0x5c, 0x92, 0x4b, 0x61, 0xc2, 0x79, 0xd3, 0xea, 0x5d, 0xdd, 0xd4,
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}
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var communityAPIKeyCiphertext = []byte{
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0x51, 0x0b, 0x26, 0xaf, 0xac, 0x6f, 0xf6, 0x41, 0x79, 0xde, 0x8d, 0x36,
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0x83, 0x46, 0xb5, 0xd5, 0x96, 0xef, 0xad, 0xed, 0xe0, 0xd0, 0xc7, 0xc2,
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0x90, 0x01, 0x50, 0x5f, 0x55, 0x59, 0x9f, 0xac, 0x1f, 0xd0, 0x70, 0x18,
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0x91, 0x4f, 0x7a, 0x32,
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}
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var communityAPIKeyTag = []byte{
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0x56, 0xb0, 0x28, 0x68, 0x9f, 0x39, 0x0d, 0xbc, 0xc0, 0x8e, 0xfb, 0x52,
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0x3a, 0xd6, 0x18, 0xae,
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}
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func getCommunityAPIKey() (string, error) {
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communityAPIKeyOnce.Do(func() {
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hasher := sha256.New()
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for _, part := range communityAPIKeySeedParts {
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hasher.Write(part)
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}
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block, err := aes.NewCipher(hasher.Sum(nil))
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if err != nil {
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communityAPIKeyErr = err
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return
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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communityAPIKeyErr = err
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return
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}
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sealed := make([]byte, 0, len(communityAPIKeyCiphertext)+len(communityAPIKeyTag))
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sealed = append(sealed, communityAPIKeyCiphertext...)
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sealed = append(sealed, communityAPIKeyTag...)
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plaintext, err := gcm.Open(nil, communityAPIKeyNonce, sealed, communityAPIKeyAAD)
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if err != nil {
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communityAPIKeyErr = err
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return
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}
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communityAPIKey = string(plaintext)
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})
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if communityAPIKeyErr != nil {
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return "", communityAPIKeyErr
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}
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return communityAPIKey, nil
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}
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func communityUserAgent() string {
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version := strings.TrimSpace(AppVersion)
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if version == "" || version == "Unknown" {
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return "SpotiFLAC"
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}
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return "SpotiFLAC/" + version
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}
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func setCommunityRequestHeaders(req *http.Request) error {
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apiKey, err := getCommunityAPIKey()
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if err != nil {
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return fmt.Errorf("failed to prepare community API key: %w", err)
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}
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req.Header.Set("x-api-key", apiKey)
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req.Header.Set("User-Agent", communityUserAgent())
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return nil
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}
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