52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
package dongle
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import (
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"crypto/des"
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)
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// ByDes encrypts by des.
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// 通过 des 加密
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func (e Encrypter) ByDes(c *Cipher) Encrypter {
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if len(e.src) == 0 || e.Error != nil {
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return e
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}
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block, err := des.NewCipher(c.key)
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if err != nil {
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e.Error = invalidDesKeyError()
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return e
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}
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if c.mode != ECB && len(c.iv) != block.BlockSize() {
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e.Error = invalidDesIVError()
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return e
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}
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if c.padding == No && len(e.src)%block.BlockSize() != 0 {
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e.Error = invalidDesSrcError()
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return e
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}
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e.dst, e.Error = c.Encrypt(e.src, block)
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return e
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}
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// ByDes decrypts by des.
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// 通过 des 解密
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func (d Decrypter) ByDes(c *Cipher) Decrypter {
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if len(d.src) == 0 || d.Error != nil {
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return d
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}
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block, err := des.NewCipher(c.key)
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if err != nil {
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d.Error = invalidDesKeyError()
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return d
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}
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if c.mode != ECB && len(c.iv) != block.BlockSize() {
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d.Error = invalidDesIVError()
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return d
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}
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if (c.mode == CBC || c.padding == No) && len(d.src)%block.BlockSize() != 0 {
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d.Error = invalidDesSrcError()
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return d
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}
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d.dst, d.Error = c.Decrypt(d.src, block)
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return d
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}
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