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config: fix size computation for allocation may overflow

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This commit is contained in:
albertony 2024-08-15 21:10:41 +02:00
parent 37c12732f9
commit e439121ab2
1 changed files with 4 additions and 0 deletions
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4
fs/config/obscure/obscure.go
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@ -10,6 +10,7 @@ import (
"fmt" "fmt"
"io" "io"
"log" "log"
"math"
) )
// crypt internals // crypt internals
@ -47,6 +48,9 @@ func crypt(out, in, iv []byte) error {
// This is done by encrypting with AES-CTR // This is done by encrypting with AES-CTR
func Obscure(x string) (string, error) { func Obscure(x string) (string, error) {
plaintext := []byte(x) plaintext := []byte(x)
if math.MaxInt32-aes.BlockSize < len(plaintext) {
return "", fmt.Errorf("value too large")
}
ciphertext := make([]byte, aes.BlockSize+len(plaintext)) ciphertext := make([]byte, aes.BlockSize+len(plaintext))
iv := ciphertext[:aes.BlockSize] iv := ciphertext[:aes.BlockSize]
if _, err := io.ReadFull(cryptRand, iv); err != nil { if _, err := io.ReadFull(cryptRand, iv); err != nil {