# package pem
`import "encoding/pem"`
pem包实现了PEM数据编码(源自保密增强邮件协议)。目前PEM编码主要用于TLS密钥和证书。参见[RFC 1421](http://tools.ietf.org/html/rfc1421)
## Index
* [type Block](#Block)
* [func Decode(data []byte) (p \*Block, rest []byte)](#Decode)
* [func Encode(out io.Writer, b \*Block) error](#Encode)
* [func EncodeToMemory(b \*Block) []byte](#EncodeToMemory)
## type [Block](https://github.com/golang/go/blob/master/src/encoding/pem/pem.go#L25 "View Source")
```
type Block struct {
Type string // 得自前言的类型(如"RSA PRIVATE KEY")
Headers map[string]string // 可选的头项
Bytes []byte // 内容解码后的数据,一般是DER编码的ASN.1结构
}
```
Block代表PEM编码的结构。编码格式如下:
```
-----BEGIN Type-----
Headers
base64-encoded Bytes
-----END Type-----
```
其中Headers是可为空的多行键值对。
### func [Decode](https://github.com/golang/go/blob/master/src/encoding/pem/pem.go#L76 "View Source")
```
func Decode(data []byte) (p *Block, rest []byte)
```
Decode函数会从输入里查找到下一个PEM格式的块(证书、私钥等)。它返回解码得到的Block和剩余未解码的数据。如果未发现PEM数据,返回(nil, data)。
## func [Encode](https://github.com/golang/go/blob/master/src/encoding/pem/pem.go#L218 "View Source")
```
func Encode(out io.Writer, b *Block) error
```
## func [EncodeToMemory](https://github.com/golang/go/blob/master/src/encoding/pem/pem.go#L273 "View Source")
```
func EncodeToMemory(b *Block) []byte
```
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