# package x509
`import "crypto/x509"`
x509包解析X.509编码的证书和密钥。
## Index
* [Constants](#pkg-constants)
* [Variables](#pkg-variables)
* [type PEMCipher](#PEMCipher)
* [type PublicKeyAlgorithm](#PublicKeyAlgorithm)
* [type SignatureAlgorithm](#SignatureAlgorithm)
* [type SystemRootsError](#SystemRootsError)
* [func (e SystemRootsError) Error() string](#SystemRootsError.Error)
* [type HostnameError](#HostnameError)
* [func (h HostnameError) Error() string](#HostnameError.Error)
* [type UnknownAuthorityError](#UnknownAuthorityError)
* [func (e UnknownAuthorityError) Error() string](#UnknownAuthorityError.Error)
* [type ConstraintViolationError](#ConstraintViolationError)
* [func (ConstraintViolationError) Error() string](#ConstraintViolationError.Error)
* [type UnhandledCriticalExtension](#UnhandledCriticalExtension)
* [func (h UnhandledCriticalExtension) Error() string](#UnhandledCriticalExtension.Error)
* [type CertificateInvalidError](#CertificateInvalidError)
* [func (e CertificateInvalidError) Error() string](#CertificateInvalidError.Error)
* [type KeyUsage](#KeyUsage)
* [type ExtKeyUsage](#ExtKeyUsage)
* [type VerifyOptions](#VerifyOptions)
* [type InvalidReason](#InvalidReason)
* [type Certificate](#Certificate)
* [func (c \*Certificate) CheckSignatureFrom(parent \*Certificate) (err error)](#Certificate.CheckSignatureFrom)
* [func (c \*Certificate) CheckCRLSignature(crl \*pkix.CertificateList) (err error)](#Certificate.CheckCRLSignature)
* [func (c \*Certificate) CheckSignature(algo SignatureAlgorithm, signed, signature []byte) (err error)](#Certificate.CheckSignature)
* [func (c \*Certificate) CreateCRL(rand io.Reader, priv interface{}, revokedCerts []pkix.RevokedCertificate, now, expiry time.Time) (crlBytes []byte, err error)](#Certificate.CreateCRL)
* [func (c \*Certificate) Equal(other \*Certificate) bool](#Certificate.Equal)
* [func (c \*Certificate) Verify(opts VerifyOptions) (chains [][]\*Certificate, err error)](#Certificate.Verify)
* [func (c \*Certificate) VerifyHostname(h string) error](#Certificate.VerifyHostname)
* [type CertPool](#CertPool)
* [func NewCertPool() \*CertPool](#NewCertPool)
* [func (s \*CertPool) AddCert(cert \*Certificate)](#CertPool.AddCert)
* [func (s \*CertPool) AppendCertsFromPEM(pemCerts []byte) (ok bool)](#CertPool.AppendCertsFromPEM)
* [func (s \*CertPool) Subjects() (res [][]byte)](#CertPool.Subjects)
* [type CertificateRequest](#CertificateRequest)
* [func MarshalECPrivateKey(key \*ecdsa.PrivateKey) ([]byte, error)](#MarshalECPrivateKey)
* [func MarshalPKCS1PrivateKey(key \*rsa.PrivateKey) []byte](#MarshalPKCS1PrivateKey)
* [func MarshalPKIXPublicKey(pub interface{}) ([]byte, error)](#MarshalPKIXPublicKey)
* [func ParseECPrivateKey(der []byte) (key \*ecdsa.PrivateKey, err error)](#ParseECPrivateKey)
* [func ParsePKCS1PrivateKey(der []byte) (key \*rsa.PrivateKey, err error)](#ParsePKCS1PrivateKey)
* [func ParsePKCS8PrivateKey(der []byte) (key interface{}, err error)](#ParsePKCS8PrivateKey)
* [func ParsePKIXPublicKey(derBytes []byte) (pub interface{}, err error)](#ParsePKIXPublicKey)
* [func EncryptPEMBlock(rand io.Reader, blockType string, data, password []byte, alg PEMCipher) (\*pem.Block, error)](#EncryptPEMBlock)
* [func IsEncryptedPEMBlock(b \*pem.Block) bool](#IsEncryptedPEMBlock)
* [func DecryptPEMBlock(b \*pem.Block, password []byte) ([]byte, error)](#DecryptPEMBlock)
* [func ParseCRL(crlBytes []byte) (certList \*pkix.CertificateList, err error)](#ParseCRL)
* [func ParseDERCRL(derBytes []byte) (certList \*pkix.CertificateList, err error)](#ParseDERCRL)
* [func ParseCertificate(asn1Data []byte) (\*Certificate, error)](#ParseCertificate)
* [func ParseCertificateRequest(asn1Data []byte) (\*CertificateRequest, error)](#ParseCertificateRequest)
* [func ParseCertificates(asn1Data []byte) ([]\*Certificate, error)](#ParseCertificates)
* [func CreateCertificate(rand io.Reader, template, parent \*Certificate, pub interface{}, priv interface{}) (cert []byte, err error)](#CreateCertificate)
* [func CreateCertificateRequest(rand io.Reader, template \*CertificateRequest, priv interface{}) (csr []byte, err error)](#CreateCertificateRequest)
### Examples
* [Certificate.Verify](#example-Certificate-Verify)
## Constants
```
const (
PEMCipherDES
PEMCipher3DES
PEMCipherAES128
PEMCipherAES192
PEMCipherAES256
)
```
可能会被EncryptPEMBlock加密算法使用的值。
## Variables
```
var ErrUnsupportedAlgorithm = errors.New("x509: cannot verify signature: algorithm unimplemented")
```
当试图执行包含目前未实现的算法的操作时，会返回ErrUnsupportedAlgorithm。
```
var IncorrectPasswordError = errors.New("x509: decryption password incorrect")
```
当检测到不正确的密码时，会返回IncorrectPasswordError。
## type [PEMCipher](https://github.com/golang/go/blob/master/src/crypto/x509/pem_decrypt.go#L23 "View Source")
```
type PEMCipher int
```
## type [PublicKeyAlgorithm](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L172 "View Source")
```
type PublicKeyAlgorithm int
```
```
const (
UnknownPublicKeyAlgorithm PublicKeyAlgorithm = iota
RSA
DSA
ECDSA
)
```
## type [SignatureAlgorithm](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L154 "View Source")
```
type SignatureAlgorithm int
```
```
const (
UnknownSignatureAlgorithm SignatureAlgorithm = iota
MD2WithRSA
MD5WithRSA
SHA1WithRSA
SHA256WithRSA
SHA384WithRSA
SHA512WithRSA
DSAWithSHA1
DSAWithSHA256
ECDSAWithSHA1
ECDSAWithSHA256
ECDSAWithSHA384
ECDSAWithSHA512
)
```
## type [SystemRootsError](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L119 "View Source")
```
type SystemRootsError struct {
}
```
当从系统装载根证书失败时，会返回SystemRootsError。
### func (SystemRootsError) [Error](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L122 "View Source")
```
func (e SystemRootsError) Error() string
```
## type [HostnameError](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L62 "View Source")
```
type HostnameError struct {
Certificate *Certificate
Host string
}
```
当认证的名字和请求的名字不匹配时，会返回HostnameError。
### func (HostnameError) [Error](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L67 "View Source")
```
func (h HostnameError) Error() string
```
## type [UnknownAuthorityError](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L93 "View Source")
```
type UnknownAuthorityError struct {
// 内含隐藏或非导出字段
}
```
当证书的发布者未知时，会返回UnknownAuthorityError。
### func (UnknownAuthorityError) [Error](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L103 "View Source")
```
func (e UnknownAuthorityError) Error() string
```
## type [ConstraintViolationError](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L527 "View Source")
```
type ConstraintViolationError struct{}
```
当请求的用途不被证书许可时，会返回ConstraintViolationError。如：当公钥不是证书的签名密钥时用它检查签名。
### func (ConstraintViolationError) [Error](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L529 "View Source")
```
func (ConstraintViolationError) Error() string
```
## type [UnhandledCriticalExtension](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L677 "View Source")
```
type UnhandledCriticalExtension struct{}
```
### func (UnhandledCriticalExtension) [Error](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L679 "View Source")
```
func (h UnhandledCriticalExtension) Error() string
```
## type [CertificateInvalidError](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L39 "View Source")
```
type CertificateInvalidError struct {
Cert *Certificate
Reason InvalidReason
}
```
当发生其余的错误时，会返回CertificateInvalidError。本包的使用者可能会想统一处理所有这类错误。
### func (CertificateInvalidError) [Error](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L44 "View Source")
```
func (e CertificateInvalidError) Error() string
```
## type [KeyUsage](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L361 "View Source")
```
type KeyUsage int
```
KeyUsage代表给定密钥的合法操作集。用KeyUsage类型常数的位图表示。（字位表示有无）
```
const (
KeyUsageDigitalSignature KeyUsage = 1 << iota
KeyUsageContentCommitment
KeyUsageKeyEncipherment
KeyUsageDataEncipherment
KeyUsageKeyAgreement
KeyUsageCertSign
KeyUsageCRLSign
KeyUsageEncipherOnly
KeyUsageDecipherOnly
)
```
## type [ExtKeyUsage](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L404 "View Source")
```
type ExtKeyUsage int
```
ExtKeyUsage代表给定密钥的合法操作扩展集。每一个ExtKeyUsage类型常数定义一个特定的操作。
```
const (
ExtKeyUsageAny ExtKeyUsage = iota
ExtKeyUsageServerAuth
ExtKeyUsageClientAuth
ExtKeyUsageCodeSigning
ExtKeyUsageEmailProtection
ExtKeyUsageIPSECEndSystem
ExtKeyUsageIPSECTunnel
ExtKeyUsageIPSECUser
ExtKeyUsageTimeStamping
ExtKeyUsageOCSPSigning
ExtKeyUsageMicrosoftServerGatedCrypto
ExtKeyUsageNetscapeServerGatedCrypto
)
```
## type [VerifyOptions](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L128 "View Source")
```
type VerifyOptions struct {
DNSName string
Intermediates *CertPool
Roots *CertPool // 如为nil，将使用系统根证书池
CurrentTime time.Time // 如为零值，将使用当前时间
// KeyUsage指定了可以接受哪些密钥扩展用途，空列表代表ExtKeyUsageServerAuth。
// 密钥用途被作为生成证书链的限制条件（类似Windows加密应用程序接口的行为，但不完全一样）
// 要接受任何密钥用途，可以使本字段包含ExtKeyUsageAny。
KeyUsages []ExtKeyUsage
}
```
VerifyOptions包含提供给Certificate.Verify方法的参数。它是结构体类型，因为其他PKIX认证API需要很长参数。
## type [InvalidReason](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L16 "View Source")
```
type InvalidReason int
```
```
const (
// NotAuthorizedToSign表示给本证书签名的证书不是CA证书
NotAuthorizedToSign InvalidReason = iota
// Expired表示证书已过期，根据VerifyOptions.CurrentTime判断
Expired
// CANotAuthorizedForThisName表示中间证书或根证书具有名字限制，且不包含被检查的名字
CANotAuthorizedForThisName
// TooManyIntermediates表示违反了路径长度限制
TooManyIntermediates
// IncompatibleUsage表示证书的密钥用途显示它只能用于其它目的
IncompatibleUsage
)
```
## type [Certificate](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L459 "View Source")
```
type Certificate struct {
Raw []byte // 原始、完整的ASN.1 DER内容（证书、签名算法、签名）
RawTBSCertificate []byte // ASN.1 DER 内容的证书部分
RawSubjectPublicKeyInfo []byte // 原始DER编码的SubjectPublicKeyInfo
RawSubject []byte // 原始DER编码的Subject
RawIssuer []byte // 原始DER编码的Issuer
Signature []byte
SignatureAlgorithm SignatureAlgorithm
PublicKeyAlgorithm PublicKeyAlgorithm
PublicKey interface{}
Version int
SerialNumber *big.Int
Issuer pkix.Name
Subject pkix.Name
NotBefore, NotAfter time.Time // 有效期前后界，本时间段之外无效
KeyUsage KeyUsage
// Extensions保管原始的X.509扩展。当解析证书时，本字段用于摘录本包未解析的不关键扩展。
// 序列化证书时，Extensions字段会被忽略，参见ExtraExtensions。
Extensions []pkix.Extension
// ExtraExtensions包含应被直接拷贝到任何序列化的证书中的扩展。
// 本字段保管的值会覆盖任何其它字段生成的扩展。
// ExtraExtensions字段在解析证书时不会被填写，参见Extensions。
ExtraExtensions []pkix.Extension
ExtKeyUsage []ExtKeyUsage // 密钥扩展用途的序列
UnknownExtKeyUsage []asn1.ObjectIdentifier // 遇到的本包不能识别的密钥扩展用途
BasicConstraintsValid bool // 如果下两个字段合法，将为真
IsCA bool
MaxPathLen int
SubjectKeyId []byte
AuthorityKeyId []byte
// RFC 5280, 4.2.2.1（认证信息存取）
OCSPServer []string
IssuingCertificateURL []string
// 证书持有者的替用名称
DNSNames []string
EmailAddresses []string
IPAddresses []net.IP
// 名称的约束
PermittedDNSDomainsCritical bool // 如为真则名称约束被标记为关键的
PermittedDNSDomains []string
// CRL配销点
CRLDistributionPoints []string
PolicyIdentifiers []asn1.ObjectIdentifier
}
```
Certificate代表一个X.509证书。
### func (\*Certificate) [CheckSignatureFrom](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L588 "View Source")
```
func (c *Certificate) CheckSignatureFrom(parent *Certificate) (err error)
```
CheckSignatureFrom检查c中的签名是否是来自parent的合法签名。
### func (\*Certificate) [CheckCRLSignature](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L672 "View Source")
```
func (c *Certificate) CheckCRLSignature(crl *pkix.CertificateList) (err error)
```
CheckCRLSignature检查crl中的签名是否来自c。
### func (\*Certificate) [CheckSignature](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L616 "View Source")
```
func (c *Certificate) CheckSignature(algo SignatureAlgorithm, signed, signature []byte) (err error)
```
CheckSignature检查signature是否是c的公钥生成的signed的合法签名。
### func (\*Certificate) [CreateCRL](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1556 "View Source")
```
func (c *Certificate) CreateCRL(rand io.Reader, priv interface{}, revokedCerts []pkix.RevokedCertificate, now, expiry time.Time) (crlBytes []byte, err error)
```
CreateCRL返回一个DER编码的CRL（证书注销列表），使用c签名，并包含给出的已取消签名列表。
只支持RSA类型的密钥（priv参数必须是*rsa.PrivateKey类型）。
### func (\*Certificate) [Equal](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L533 "View Source")
```
func (c *Certificate) Equal(other *Certificate) bool
```
### func (\*Certificate) [Verify](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L210 "View Source")
```
func (c *Certificate) Verify(opts VerifyOptions) (chains [][]*Certificate, err error)
```
Verify通过创建一到多个从c到opts.Roots中的证书的链条来认证c，如有必要会使用opts.Intermediates中的证书。如果成功，它会返回一到多个证书链条，每一条都以c开始，以opts.Roots中的证书结束。
警告：它不会做任何取消检查。
Example
```
// Verifying with a custom list of root certificates.
const rootPEM = `
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----`
const certPEM = `
-----BEGIN CERTIFICATE-----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==
-----END CERTIFICATE-----`
// First, create the set of root certificates. For this example we only
// have one. It's also possible to omit this in order to use the
// default root set of the current operating system.
roots := x509.NewCertPool()
ok := roots.AppendCertsFromPEM([]byte(rootPEM))
if !ok {
panic("failed to parse root certificate")
}
block, _ := pem.Decode([]byte(certPEM))
if block == nil {
panic("failed to parse certificate PEM")
}
cert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
panic("failed to parse certificate: " + err.Error())
}
opts := x509.VerifyOptions{
DNSName: "mail.google.com",
Roots: roots,
}
if _, err := cert.Verify(opts); err != nil {
panic("failed to verify certificate: " + err.Error())
}
```
### func (\*Certificate) [VerifyHostname](https://github.com/golang/go/blob/master/src/crypto/x509/verify.go#L381 "View Source")
```
func (c *Certificate) VerifyHostname(h string) error
```
如果c是名为h的主机的合法证书，VerifyHostname会返回真；否则它返回一个描述该不匹配情况的错误。
## type [CertPool](https://github.com/golang/go/blob/master/src/crypto/x509/cert_pool.go#L12 "View Source")
```
type CertPool struct {
// 内含隐藏或非导出字段
}
```
CertPool代表一个证书集合/证书池。
### func [NewCertPool](https://github.com/golang/go/blob/master/src/crypto/x509/cert_pool.go#L19 "View Source")
```
func NewCertPool() *CertPool
```
NewCertPool创建一个新的、空的CertPool。
### func (\*CertPool) [AddCert](https://github.com/golang/go/blob/master/src/crypto/x509/cert_pool.go#L56 "View Source")
```
func (s *CertPool) AddCert(cert *Certificate)
```
AddCert向s中添加一个证书。
### func (\*CertPool) [AppendCertsFromPEM](https://github.com/golang/go/blob/master/src/crypto/x509/cert_pool.go#L85 "View Source")
```
func (s *CertPool) AppendCertsFromPEM(pemCerts []byte) (ok bool)
```
AppendCertsFromPEM试图解析一系列PEM编码的证书。它将找到的任何证书都加入s中，如果所有证书都成功被解析，会返回真。
在许多Linux系统中，/etc/ssl/cert.pem会包含适合本函数的大量系统级根证书。
### func (\*CertPool) [Subjects](https://github.com/golang/go/blob/master/src/crypto/x509/cert_pool.go#L110 "View Source")
```
func (s *CertPool) Subjects() (res [][]byte)
```
Subjects返回池中所有证书的DER编码的持有者的列表。
## type [CertificateRequest](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1596 "View Source")
```
type CertificateRequest struct {
Raw []byte // 原始、完整的ASN.1 DER内容（CSR、签名算法、签名）
RawTBSCertificateRequest []byte // ASN.1 DER 内容的证书请求信息
RawSubjectPublicKeyInfo []byte // 原始DER编码的SubjectPublicKeyInfo
RawSubject []byte // 原始DER编码的Subject
Version int
Signature []byte
SignatureAlgorithm SignatureAlgorithm
PublicKeyAlgorithm PublicKeyAlgorithm
PublicKey interface{}
Subject pkix.Name
// Attributes提供关于证书持有者的额外信息，参见RFC 2986 section 4.1。
Attributes []pkix.AttributeTypeAndValueSET
// Extensions保管原始的X.509扩展。当解析CSR时，本字段用于摘录本包未解析的不关键扩展。
Extensions []pkix.Extension
// ExtraExtensions包含应被直接拷贝到任何序列化的CSR中的扩展。
// 本字段保管的值会覆盖任何其它字段生成的扩展，但会被Attributes字段指定的扩展覆盖。
// ExtraExtensions字段在解析CSR时不会增加，参见Extensions。
ExtraExtensions []pkix.Extension
// 证书持有者的替用名称。
DNSNames []string
EmailAddresses []string
IPAddresses []net.IP
}
```
CertificateRequest代表一个PKCS #10证书签名请求。
## func [MarshalECPrivateKey](https://github.com/golang/go/blob/master/src/crypto/x509/sec1.go#L37 "View Source")
```
func MarshalECPrivateKey(key *ecdsa.PrivateKey) ([]byte, error)
```
MarshalECPrivateKey将ecdsa私钥序列化为ASN.1 DER编码。
## func [MarshalPKCS1PrivateKey](https://github.com/golang/go/blob/master/src/crypto/x509/pkcs1.go#L87 "View Source")
```
func MarshalPKCS1PrivateKey(key *rsa.PrivateKey) []byte
```
MarshalPKCS1PrivateKey将rsa私钥序列化为ASN.1 PKCS#1 DER编码。
## func [MarshalPKIXPublicKey](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L85 "View Source")
```
func MarshalPKIXPublicKey(pub interface{}) ([]byte, error)
```
MarshalPKIXPublicKey将公钥序列化为PKIX格式DER编码。
## func [ParseECPrivateKey](https://github.com/golang/go/blob/master/src/crypto/x509/sec1.go#L32 "View Source")
```
func ParseECPrivateKey(der []byte) (key *ecdsa.PrivateKey, err error)
```
ParseECPrivateKey解析ASN.1 DER编码的ecdsa私钥。
## func [ParsePKCS1PrivateKey](https://github.com/golang/go/blob/master/src/crypto/x509/pkcs1.go#L39 "View Source")
```
func ParsePKCS1PrivateKey(der []byte) (key *rsa.PrivateKey, err error)
```
ParsePKCS1PrivateKey解析ASN.1 PKCS#1 DER编码的rsa私钥。
## func [ParsePKCS8PrivateKey](https://github.com/golang/go/blob/master/src/crypto/x509/pkcs8.go#L26 "View Source")
```
func ParsePKCS8PrivateKey(der []byte) (key interface{}, err error)
```
ParsePKCS8PrivateKey解析一个未加密的PKCS#8私钥，参见[http://www.rsa.com/rsalabs/node.asp?id=2130](http://www.rsa.com/rsalabs/node.asp?id=2130)和RFC5208。
## func [ParsePKIXPublicKey](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L38 "View Source")
```
func ParsePKIXPublicKey(derBytes []byte) (pub interface{}, err error)
```
ParsePKIXPublicKey解析一个DER编码的公钥。这些公钥一般在以"BEGIN PUBLIC KEY"出现的PEM块中。
## func [EncryptPEMBlock](https://github.com/golang/go/blob/master/src/crypto/x509/pem_decrypt.go#L176 "View Source")
```
func EncryptPEMBlock(rand io.Reader, blockType string, data, password []byte, alg PEMCipher) (*pem.Block, error)
```
EncryptPEMBlock使用指定的密码、加密算法加密data，返回一个具有指定块类型，保管加密后数据的PEM块。
## func [IsEncryptedPEMBlock](https://github.com/golang/go/blob/master/src/crypto/x509/pem_decrypt.go#L99 "View Source")
```
func IsEncryptedPEMBlock(b *pem.Block) bool
```
IsEncryptedPEMBlock返回PEM块b是否是用密码加密了的。
## func [DecryptPEMBlock](https://github.com/golang/go/blob/master/src/crypto/x509/pem_decrypt.go#L112 "View Source")
```
func DecryptPEMBlock(b *pem.Block, password []byte) ([]byte, error)
```
DecryptPEMBlock接受一个加密后的PEM块和加密该块的密码password，返回解密后的DER编码字节切片。它会检查DEK信息头域，以确定用于解密的算法。如果b中没有DEK信息头域，会返回错误。如果函数发现密码不正确，会返回IncorrectPasswordError。
## func [ParseCRL](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1532 "View Source")
```
func ParseCRL(crlBytes []byte) (certList *pkix.CertificateList, err error)
```
ParseCRL从crlBytes中解析CRL（证书注销列表）。因为经常有PEM编码的CRL出现在应该是DER编码的地方，因此本函数可以透明的处理PEM编码，只要没有前导的垃圾数据。
## func [ParseDERCRL](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1543 "View Source")
```
func ParseDERCRL(derBytes []byte) (certList *pkix.CertificateList, err error)
```
ParseDERCRL从derBytes中解析DER编码的CRL。
## func [ParseCertificate](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1085 "View Source")
```
func ParseCertificate(asn1Data []byte) (*Certificate, error)
```
ParseCertificate从ASN.1 DER数据解析单个证书。
## func [ParseCertificateRequest](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1824 "View Source")
```
func ParseCertificateRequest(asn1Data []byte) (*CertificateRequest, error)
```
ParseCertificateRequest解析一个ASN.1 DER数据获取单个证书请求。
## func [ParseCertificates](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1100 "View Source")
```
func ParseCertificates(asn1Data []byte) ([]*Certificate, error)
```
ParseCertificates从ASN.1 DER编码的asn1Data中解析一到多个证书。这些证书必须是串联的，且中间没有填充。
## func [CreateCertificate](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1437 "View Source")
```
func CreateCertificate(rand io.Reader, template, parent *Certificate, pub interface{}, priv interface{}) (cert []byte, err error)
```
CreateCertificate基于模板创建一个新的证书。会用到模板的如下字段：
SerialNumber、Subject、NotBefore、NotAfter、KeyUsage、ExtKeyUsage、UnknownExtKeyUsage、
BasicConstraintsValid、IsCA、MaxPathLen、SubjectKeyId、DNSNames、PermittedDNSDomainsCritical、
PermittedDNSDomains、SignatureAlgorithm。
该证书会使用parent签名。如果parent和template相同，则证书是自签名的。Pub参数是被签名者的公钥，而priv是签名者的私钥。
返回的切片是DER编码的证书。
只支持RSA和ECDSA类型的密钥。（pub可以是*rsa.PublicKey或*ecdsa.PublicKey，priv可以是*rsa.PrivateKey或*ecdsa.PrivateKey）
## func [CreateCertificateRequest](https://github.com/golang/go/blob/master/src/crypto/x509/x509.go#L1667 "View Source")
```
func CreateCertificateRequest(rand io.Reader, template *CertificateRequest, priv interface{}) (csr []byte, err error)
```
CreateCertificateRequest基于模板创建一个新的证书请求。会用到模板的如下字段：
Subject、Attributes、Extension、SignatureAlgorithm、DNSNames、EmailAddresses、IPAddresses。
priv是签名者的私钥。返回的切片是DER编码的证书请求。
只支持RSA（*rsa.PrivateKey）和ECDSA（*ecdsa.PrivateKey）类型的密钥。
- 库
- package achive
- package tar
- package zip
- package bufio
- package builtin
- package bytes
- package compress
- package bzip2
- package flate
- package gzip
- package lzw
- package zlib
- package container
- package heap
- package list
- package ring
- package crypto
- package aes
- package cipher
- package des
- package dsa
- package ecdsa
- package elliptic
- package hmac
- package md5
- package rand
- package rc4
- package rsa
- package sha1
- package sha256
- package sha512
- package subtle
- package tls
- package x509
- package pkix
- package database
- package sql
- package driver
- package encoding
- package ascii85
- package asn1
- package base32
- package base64
- package binary
- package csv
- package gob
- package hex
- package json
- package pem
- package xml
- package errors
- package expvar
- package flag
- package fmt
- package go
- package doc
- package format
- package parser
- package printer
- package hash
- package adler32
- package crc32
- package crc64
- package fnv
- package html
- package template
- package image
- package color
- package palette
- package draw
- package gif
- package jpeg
- package png
- package index
- package suffixarray
- package io
- package ioutil
- package log
- package syslog
- package math
- package big
- package cmplx
- package rand
- package mime
- package multipart
- package net
- package http
- package cgi
- package cookiejar
- package fcgi
- package httptest
- package httputil
- package pprof
- package mail
- package rpc
- package jsonrpc
- package smtp
- package textproto
- package url
- package os
- package exec
- package signal
- package user
- package path
- package filepath
- package reflect
- package regexp
- package runtime
- package cgo
- package debug
- package pprof
- package race
- package sort
- package strconv
- package strings
- package sync
- package atomic
- package text
- package scanner
- package tabwriter
- package template
- package time
- package unicode
- package utf16
- package utf8
- package unsafe