mirror of
https://github.com/ipfs/kubo.git
synced 2026-02-21 18:37:45 +08:00
9500a5289b
remove duplicate profile threshold tests from add_test.go since they are fully covered by the data-driven tests in cid_profiles_test.go. changes: - improve test names to describe what threshold is being tested - add inline documentation explaining each test's purpose - add byte-precise helper IPFSAddDeterministicBytes for threshold tests - remove ~200 lines of duplicated test code from add_test.go - keep non-profile tests (pinning, symlinks, hidden files) in add_test.go
53 lines
1.5 KiB
Go
53 lines
1.5 KiB
Go
package testutils
|
|
|
|
import (
|
|
"crypto/sha256"
|
|
"io"
|
|
|
|
"github.com/dustin/go-humanize"
|
|
"golang.org/x/crypto/chacha20"
|
|
)
|
|
|
|
type randomReader struct {
|
|
cipher *chacha20.Cipher
|
|
remaining int64
|
|
}
|
|
|
|
func (r *randomReader) Read(p []byte) (int, error) {
|
|
if r.remaining <= 0 {
|
|
return 0, io.EOF
|
|
}
|
|
n := int64(len(p))
|
|
if n > r.remaining {
|
|
n = r.remaining
|
|
}
|
|
// Generate random bytes directly into the provided buffer
|
|
r.cipher.XORKeyStream(p[:n], make([]byte, n))
|
|
r.remaining -= n
|
|
return int(n), nil
|
|
}
|
|
|
|
// DeterministicRandomReader produces specified number of pseudo-random bytes
|
|
// from a seed. Size can be specified as a humanize string (e.g., "256KiB", "1MiB").
|
|
func DeterministicRandomReader(sizeStr string, seed string) (io.Reader, error) {
|
|
size, err := humanize.ParseBytes(sizeStr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return DeterministicRandomReaderBytes(int64(size), seed)
|
|
}
|
|
|
|
// DeterministicRandomReaderBytes produces exactly `size` pseudo-random bytes
|
|
// from a seed. Use this when exact byte precision is needed.
|
|
func DeterministicRandomReaderBytes(size int64, seed string) (io.Reader, error) {
|
|
// Hash the seed string to a 32-byte key for ChaCha20
|
|
key := sha256.Sum256([]byte(seed))
|
|
// Use ChaCha20 for deterministic random bytes
|
|
var nonce [chacha20.NonceSize]byte // Zero nonce for simplicity
|
|
cipher, err := chacha20.NewUnauthenticatedCipher(key[:chacha20.KeySize], nonce[:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &randomReader{cipher: cipher, remaining: size}, nil
|
|
}
|