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This commit is contained in:
Wade Simmons
2026-06-09 13:49:55 -04:00
parent 69c6132a76
commit 060b46f4b3
1 changed files with 24 additions and 20 deletions
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noiseutil/fips140.go
+18 -14
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@@ -38,7 +38,7 @@ var emptyNonce = []byte{0, 0, 0, 0, 0, 0, 0, 0}
func cipherAESGCMFIPS140(k [32]byte) noise.Cipher {
gcm := aeadAESGCMTLS13(k[:], emptyPrefix)
return &aeadCipher{
return &aeadGCMFIPS140Cipher{
AEAD: gcm,
ready: false,
nonce: func(n uint64) []byte {
@@ -50,9 +50,14 @@ func cipherAESGCMFIPS140(k [32]byte) noise.Cipher {
}
}
func (c *aeadCipher) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
if !c.ready {
// crypto/tls.aeadAESGCMTLS13 expected that the first call to Seal
type aeadGCMFIPS140Cipher struct {
cipher.AEAD
ready bool
nonce func(uint64) []byte
}
func (c *aeadGCMFIPS140Cipher) init(nonce []byte) {
// crypto/tls.aeadAESGCMTLS13 expects that the first call to Seal
// is with a counter of `0`, this is how it extracts the nonce mask.
// We can clean this up in the future when NewGCMWithCounterNonce or
// NewGCMForQUIC are available:
@@ -61,30 +66,29 @@ func (c *aeadCipher) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
}
c.ready = true
}
func (c *aeadGCMFIPS140Cipher) Seal(dst, nonce, plaintext, additionalData []byte) []byte {
if !c.ready {
c.init(nonce)
}
return c.AEAD.Seal(dst, nonce, plaintext, additionalData)
}
type aeadCipher struct {
cipher.AEAD
ready bool
nonce func(uint64) []byte
}
func (c *aeadCipher) Encrypt(out []byte, n uint64, ad, plaintext []byte) []byte {
func (c *aeadGCMFIPS140Cipher) Encrypt(out []byte, n uint64, ad, plaintext []byte) []byte {
return c.Seal(out, c.nonce(n), plaintext, ad)
}
func (c *aeadCipher) Decrypt(out []byte, n uint64, ad, ciphertext []byte) ([]byte, error) {
func (c *aeadGCMFIPS140Cipher) Decrypt(out []byte, n uint64, ad, ciphertext []byte) ([]byte, error) {
return c.Open(out, c.nonce(n), ciphertext, ad)
}
func (c *aeadCipher) EncryptDanger(out, ad, plaintext []byte, n uint64, nb []byte) ([]byte, error) {
func (c *aeadGCMFIPS140Cipher) EncryptDanger(out, ad, plaintext []byte, n uint64, nb []byte) ([]byte, error) {
binary.BigEndian.PutUint64(nb[4:], n)
out = c.Seal(out, nb[4:], plaintext, ad)
return out, nil
}
func (c *aeadCipher) DecryptDanger(out, ad, ciphertext []byte, n uint64, nb []byte) ([]byte, error) {
func (c *aeadGCMFIPS140Cipher) DecryptDanger(out, ad, ciphertext []byte, n uint64, nb []byte) ([]byte, error) {
binary.BigEndian.PutUint64(nb[4:], n)
return c.Open(out, nb[4:], ciphertext, ad)
}