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docs: cross-host decryption guide and comment cleanup (#614)

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* docs(readme): document cross-host decryption workflow

* docs: drop RFC citations and what-comments
This commit is contained in:
Roger
2026-06-13 21:17:00 +08:00
committed by GitHub
parent dc610d3c63
commit 2860bb82f9
31 changed files with 176 additions and 103 deletions
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crypto/crypto.go
+1 -5
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@@ -137,7 +137,6 @@ func AESGCMDecryptBlob(key, blob, aad []byte) ([]byte, error) {
return aead.Open(nil, blob[:gcmNonceSize], blob[gcmNonceSize:], aad)
}
// cbcEncrypt adds PKCS5 padding and encrypts plaintext in CBC mode.
func cbcEncrypt(block cipher.Block, iv, plaintext []byte) ([]byte, error) {
if len(iv) != block.BlockSize() {
return nil, errInvalidIVLength
@@ -149,7 +148,6 @@ func cbcEncrypt(block cipher.Block, iv, plaintext []byte) ([]byte, error) {
return dst, nil
}
// cbcDecrypt decrypts ciphertext in CBC mode and removes PKCS5 padding.
func cbcDecrypt(block cipher.Block, iv, ciphertext []byte) ([]byte, error) {
bs := block.BlockSize()
if len(iv) != bs {
@@ -172,8 +170,7 @@ func cbcDecrypt(block cipher.Block, iv, ciphertext []byte) ([]byte, error) {
return dst, nil
}
// paddingZero pads src with zero bytes to the given length.
// Returns src unchanged if already long enough; otherwise returns a new slice.
// paddingZero returns src unchanged if already long enough; otherwise a zero-padded new slice.
func paddingZero(src []byte, length int) []byte {
if len(src) >= length {
return src
@@ -195,7 +192,6 @@ func pkcs5Padding(src []byte, blockSize int) []byte {
return dst
}
// pkcs5UnPadding removes PKCS5/PKCS7 padding from src.
func pkcs5UnPadding(src []byte, blockSize int) ([]byte, error) {
length := len(src)
if length == 0 {