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package dongle
import (
"golang.org/x/crypto/blowfish"
)
// ByBlowfish encrypts by blowfish.
// 通过 blowfish 加密
func (e Encrypter) ByBlowfish(c *Cipher) Encrypter {
if len(e.src) == 0 || e.Error != nil {
return e
}
block, err := blowfish.NewCipher(c.key)
if err != nil {
e.Error = invalidBlowfishKeyError()
return e
}
if c.mode != ECB && len(c.iv) != block.BlockSize() {
e.Error = invalidBlowfishIVError()
return e
}
if c.padding == No && len(e.src)%block.BlockSize() != 0 {
e.Error = invalidBlowfishSrcError()
return e
}
e.dst, e.Error = c.Encrypt(e.src, block)
return e
}
// ByBlowfish decrypts by blowfish.
// 通过 blowfish 解密
func (d Decrypter) ByBlowfish(c *Cipher) Decrypter {
if len(d.src) == 0 || d.Error != nil {
return d
}
block, err := blowfish.NewCipher(c.key)
if err != nil {
d.Error = invalidBlowfishKeyError()
return d
}
if c.mode != ECB && len(c.iv) != block.BlockSize() {
d.Error = invalidBlowfishIVError()
return d
}
if (c.mode == CBC || c.padding == No) && len(d.src)%block.BlockSize() != 0 {
d.Error = invalidBlowfishSrcError()
return d
}
d.dst, d.Error = c.Decrypt(d.src, block)
return d
}
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