import "crypto/x509"
Package x509 parses X.509-encoded keys and certificates.
On UNIX systems the environment variables SSL_CERT_FILE and SSL_CERT_DIR can be used to override the system default locations for the SSL certificate file and SSL certificate files directory, respectively.
var ErrUnsupportedAlgorithm = errors.New("x509: cannot verify signature: algorithm unimplemented")
ErrUnsupportedAlgorithm results from attempting to perform an operation that involves algorithms that are not currently implemented.
var IncorrectPasswordError = errors.New("x509: decryption password incorrect")
IncorrectPasswordError is returned when an incorrect password is detected.
func CreateCertificate(rand io.Reader, template, parent *Certificate, pub, priv interface{}) (cert []byte, err error)
CreateCertificate creates a new X.509v3 certificate based on a template. The following members of template are used:
- AuthorityKeyId - BasicConstraintsValid - CRLDistributionPoints - DNSNames - EmailAddresses - ExcludedDNSDomains - ExcludedEmailAddresses - ExcludedIPRanges - ExcludedURIDomains - ExtKeyUsage - ExtraExtensions - IsCA - IssuingCertificateURL - KeyUsage - MaxPathLen - MaxPathLenZero - NotAfter - NotBefore - OCSPServer - PermittedDNSDomains - PermittedDNSDomainsCritical - PermittedEmailAddresses - PermittedIPRanges - PermittedURIDomains - PolicyIdentifiers - SerialNumber - SignatureAlgorithm - Subject - SubjectKeyId - URIs - UnknownExtKeyUsage
The certificate is signed by parent. If parent is equal to template then the certificate is self-signed. The parameter pub is the public key of the signee and priv is the private key of the signer.
The returned slice is the certificate in DER encoding.
The currently supported key types are *rsa.PublicKey, *ecdsa.PublicKey and ed25519.PublicKey. pub must be a supported key type, and priv must be a crypto.Signer with a supported public key.
The AuthorityKeyId will be taken from the SubjectKeyId of parent, if any, unless the resulting certificate is self-signed. Otherwise the value from template will be used.
func CreateCertificateRequest(rand io.Reader, template *CertificateRequest, priv interface{}) (csr []byte, err error)
CreateCertificateRequest creates a new certificate request based on a template. The following members of template are used:
- SignatureAlgorithm - Subject - DNSNames - EmailAddresses - IPAddresses - URIs - ExtraExtensions - Attributes (deprecated)
priv is the private key to sign the CSR with, and the corresponding public key will be included in the CSR. It must implement crypto.Signer and its Public() method must return a *rsa.PublicKey or a *ecdsa.PublicKey or a ed25519.PublicKey. (A *rsa.PrivateKey, *ecdsa.PrivateKey or ed25519.PrivateKey satisfies this.)
The returned slice is the certificate request in DER encoding.
func DecryptPEMBlock(b *pem.Block, password []byte) ([]byte, error)
DecryptPEMBlock takes a password encrypted PEM block and the password used to encrypt it and returns a slice of decrypted DER encoded bytes. It inspects the DEK-Info header to determine the algorithm used for decryption. If no DEK-Info header is present, an error is returned. If an incorrect password is detected an IncorrectPasswordError is returned. Because of deficiencies in the encrypted-PEM format, it's not always possible to detect an incorrect password. In these cases no error will be returned but the decrypted DER bytes will be random noise.
func EncryptPEMBlock(rand io.Reader, blockType string, data, password []byte, alg PEMCipher) (*pem.Block, error)
EncryptPEMBlock returns a PEM block of the specified type holding the given DER-encoded data encrypted with the specified algorithm and password.
func IsEncryptedPEMBlock(b *pem.Block) bool
IsEncryptedPEMBlock returns if the PEM block is password encrypted.
func MarshalECPrivateKey(key *ecdsa.PrivateKey) ([]byte, error)
MarshalECPrivateKey converts an EC private key to SEC 1, ASN.1 DER form.
This kind of key is commonly encoded in PEM blocks of type "EC PRIVATE KEY". For a more flexible key format which is not EC specific, use MarshalPKCS8PrivateKey.
func MarshalPKCS1PrivateKey(key *rsa.PrivateKey) []byte
MarshalPKCS1PrivateKey converts an RSA private key to PKCS#1, ASN.1 DER form.
This kind of key is commonly encoded in PEM blocks of type "RSA PRIVATE KEY". For a more flexible key format which is not RSA specific, use MarshalPKCS8PrivateKey.
func MarshalPKCS1PublicKey(key *rsa.PublicKey) []byte
MarshalPKCS1PublicKey converts an RSA public key to PKCS#1, ASN.1 DER form.
This kind of key is commonly encoded in PEM blocks of type "RSA PUBLIC KEY".
func MarshalPKCS8PrivateKey(key interface{}) ([]byte, error)
MarshalPKCS8PrivateKey converts an RSA private key to PKCS#8, ASN.1 DER form.
The following key types are currently supported: *rsa.PrivateKey, *ecdsa.PrivateKey and ed25519.PrivateKey. Unsupported key types result in an error.
This kind of key is commonly encoded in PEM blocks of type "PRIVATE KEY".
func MarshalPKIXPublicKey(pub interface{}) ([]byte, error)
MarshalPKIXPublicKey converts a public key to PKIX, ASN.1 DER form.
The following key types are currently supported: *rsa.PublicKey, *ecdsa.PublicKey and ed25519.PublicKey. Unsupported key types result in an error.
This kind of key is commonly encoded in PEM blocks of type "PUBLIC KEY".
func ParseCRL(crlBytes []byte) (*pkix.CertificateList, error)
ParseCRL parses a CRL from the given bytes. It's often the case that PEM encoded CRLs will appear where they should be DER encoded, so this function will transparently handle PEM encoding as long as there isn't any leading garbage.
func ParseDERCRL(derBytes []byte) (*pkix.CertificateList, error)
ParseDERCRL parses a DER encoded CRL from the given bytes.
func ParseECPrivateKey(der []byte) (*ecdsa.PrivateKey, error)
ParseECPrivateKey parses an EC public key in SEC 1, ASN.1 DER form.
This kind of key is commonly encoded in PEM blocks of type "EC PUBLIC KEY".
func ParsePKCS1PrivateKey(der []byte) (*rsa.PrivateKey, error)
ParsePKCS1PrivateKey parses an RSA private key in PKCS#1, ASN.1 DER form.
This kind of key is commonly encoded in PEM blocks of type "RSA PRIVATE KEY".
func ParsePKCS1PublicKey(der []byte) (*rsa.PublicKey, error)
ParsePKCS1PublicKey parses an RSA public key in PKCS#1, ASN.1 DER form.
This kind of key is commonly encoded in PEM blocks of type "RSA PUBLIC KEY".
func ParsePKCS8PrivateKey(der []byte) (key interface{}, err error)
ParsePKCS8PrivateKey parses an unencrypted private key in PKCS#8, ASN.1 DER form.
It returns a *rsa.PrivateKey, a *ecdsa.PrivateKey, or a ed25519.PrivateKey. More types might be supported in the future.
This kind of key is commonly encoded in PEM blocks of type "PRIVATE KEY".
func ParsePKIXPublicKey(derBytes []byte) (pub interface{}, err error)
ParsePKIXPublicKey parses a public key in PKIX, ASN.1 DER form.
It returns a *rsa.PublicKey, *dsa.PublicKey, *ecdsa.PublicKey, or ed25519.PublicKey. More types might be supported in the future.
This kind of key is commonly encoded in PEM blocks of type "PUBLIC KEY".
Code:
const pubPEM = `
-----BEGIN PUBLIC KEY-----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-----END PUBLIC KEY-----`
block, _ := pem.Decode([]byte(pubPEM))
if block == nil {
panic("failed to parse PEM block containing the public key")
}
pub, err := x509.ParsePKIXPublicKey(block.Bytes)
if err != nil {
panic("failed to parse DER encoded public key: " + err.Error())
}
switch pub := pub.(type) {
case *rsa.PublicKey:
fmt.Println("pub is of type RSA:", pub)
case *dsa.PublicKey:
fmt.Println("pub is of type DSA:", pub)
case *ecdsa.PublicKey:
fmt.Println("pub is of type ECDSA:", pub)
case ed25519.PublicKey:
fmt.Println("pub is of type Ed25519:", pub)
default:
panic("unknown type of public key")
}
type CertPool struct {
// contains filtered or unexported fields
}
CertPool is a set of certificates.
func NewCertPool() *CertPool
NewCertPool returns a new, empty CertPool.
func SystemCertPool() (*CertPool, error)
SystemCertPool returns a copy of the system cert pool.
Any mutations to the returned pool are not written to disk and do not affect any other pool returned by SystemCertPool.
New changes in the system cert pool might not be reflected in subsequent calls.
func (s *CertPool) AddCert(cert *Certificate)
AddCert adds a certificate to a pool.
func (s *CertPool) AppendCertsFromPEM(pemCerts []byte) (ok bool)
AppendCertsFromPEM attempts to parse a series of PEM encoded certificates. It appends any certificates found to s and reports whether any certificates were successfully parsed.
On many Linux systems, /etc/ssl/cert.pem will contain the system wide set of root CAs in a format suitable for this function.
func (s *CertPool) Subjects() [][]byte
Subjects returns a list of the DER-encoded subjects of all of the certificates in the pool.
type Certificate struct {
Raw []byte // Complete ASN.1 DER content (certificate, signature algorithm and signature).
RawTBSCertificate []byte // Certificate part of raw ASN.1 DER content.
RawSubjectPublicKeyInfo []byte // DER encoded SubjectPublicKeyInfo.
RawSubject []byte // DER encoded Subject
RawIssuer []byte // DER encoded Issuer
Signature []byte
SignatureAlgorithm SignatureAlgorithm
PublicKeyAlgorithm PublicKeyAlgorithm
PublicKey interface{}
Version int
SerialNumber *big.Int
Issuer pkix.Name
Subject pkix.Name
NotBefore, NotAfter time.Time // Validity bounds.
KeyUsage KeyUsage
// Extensions contains raw X.509 extensions. When parsing certificates,
// this can be used to extract non-critical extensions that are not
// parsed by this package. When marshaling certificates, the Extensions
// field is ignored, see ExtraExtensions.
Extensions []pkix.Extension
// ExtraExtensions contains extensions to be copied, raw, into any
// marshaled certificates. Values override any extensions that would
// otherwise be produced based on the other fields. The ExtraExtensions
// field is not populated when parsing certificates, see Extensions.
ExtraExtensions []pkix.Extension
// UnhandledCriticalExtensions contains a list of extension IDs that
// were not (fully) processed when parsing. Verify will fail if this
// slice is non-empty, unless verification is delegated to an OS
// library which understands all the critical extensions.
//
// Users can access these extensions using Extensions and can remove
// elements from this slice if they believe that they have been
// handled.
UnhandledCriticalExtensions []asn1.ObjectIdentifier
ExtKeyUsage []ExtKeyUsage // Sequence of extended key usages.
UnknownExtKeyUsage []asn1.ObjectIdentifier // Encountered extended key usages unknown to this package.
// BasicConstraintsValid indicates whether IsCA, MaxPathLen,
// and MaxPathLenZero are valid.
BasicConstraintsValid bool
IsCA bool
// MaxPathLen and MaxPathLenZero indicate the presence and
// value of the BasicConstraints' "pathLenConstraint".
//
// When parsing a certificate, a positive non-zero MaxPathLen
// means that the field was specified, -1 means it was unset,
// and MaxPathLenZero being true mean that the field was
// explicitly set to zero. The case of MaxPathLen==0 with MaxPathLenZero==false
// should be treated equivalent to -1 (unset).
//
// When generating a certificate, an unset pathLenConstraint
// can be requested with either MaxPathLen == -1 or using the
// zero value for both MaxPathLen and MaxPathLenZero.
MaxPathLen int
// MaxPathLenZero indicates that BasicConstraintsValid==true
// and MaxPathLen==0 should be interpreted as an actual
// maximum path length of zero. Otherwise, that combination is
// interpreted as MaxPathLen not being set.
MaxPathLenZero bool
SubjectKeyId []byte
AuthorityKeyId []byte
// RFC 5280, 4.2.2.1 (Authority Information Access)
OCSPServer []string
IssuingCertificateURL []string
// Subject Alternate Name values. (Note that these values may not be valid
// if invalid values were contained within a parsed certificate. For
// example, an element of DNSNames may not be a valid DNS domain name.)
DNSNames []string
EmailAddresses []string
IPAddresses []net.IP
URIs []*url.URL
// Name constraints
PermittedDNSDomainsCritical bool // if true then the name constraints are marked critical.
PermittedDNSDomains []string
ExcludedDNSDomains []string
PermittedIPRanges []*net.IPNet
ExcludedIPRanges []*net.IPNet
PermittedEmailAddresses []string
ExcludedEmailAddresses []string
PermittedURIDomains []string
ExcludedURIDomains []string
// CRL Distribution Points
CRLDistributionPoints []string
PolicyIdentifiers []asn1.ObjectIdentifier
}
A Certificate represents an X.509 certificate.
func ParseCertificate(asn1Data []byte) (*Certificate, error)
ParseCertificate parses a single certificate from the given ASN.1 DER data.
func ParseCertificates(asn1Data []byte) ([]*Certificate, error)
ParseCertificates parses one or more certificates from the given ASN.1 DER data. The certificates must be concatenated with no intermediate padding.
func (c *Certificate) CheckCRLSignature(crl *pkix.CertificateList) error
CheckCRLSignature checks that the signature in crl is from c.
func (c *Certificate) CheckSignature(algo SignatureAlgorithm, signed, signature []byte) error
CheckSignature verifies that signature is a valid signature over signed from c's public key.
func (c *Certificate) CheckSignatureFrom(parent *Certificate) error
CheckSignatureFrom verifies that the signature on c is a valid signature from parent.
func (c *Certificate) CreateCRL(rand io.Reader, priv interface{}, revokedCerts []pkix.RevokedCertificate, now, expiry time.Time) (crlBytes []byte, err error)
CreateCRL returns a DER encoded CRL, signed by this Certificate, that contains the given list of revoked certificates.
func (c *Certificate) Equal(other *Certificate) bool
func (c *Certificate) Verify(opts VerifyOptions) (chains [][]*Certificate, err error)
Verify attempts to verify c by building one or more chains from c to a certificate in opts.Roots, using certificates in opts.Intermediates if needed. If successful, it returns one or more chains where the first element of the chain is c and the last element is from opts.Roots.
If opts.Roots is nil and system roots are unavailable the returned error will be of type SystemRootsError.
Name constraints in the intermediates will be applied to all names claimed in the chain, not just opts.DNSName. Thus it is invalid for a leaf to claim example.com if an intermediate doesn't permit it, even if example.com is not the name being validated. Note that DirectoryName constraints are not supported.
Extended Key Usage values are enforced down a chain, so an intermediate or root that enumerates EKUs prevents a leaf from asserting an EKU not in that list.
WARNING: this function doesn't do any revocation checking.
Code:
// Verifying with a custom list of root certificates. const rootPEM = ` -----BEGIN CERTIFICATE----- MIIEBDCCAuygAwIBAgIDAjppMA0GCSqGSIb3DQEBBQUAMEIxCzAJBgNVBAYTAlVT MRYwFAYDVQQKEw1HZW9UcnVzdCBJbmMuMRswGQYDVQQDExJHZW9UcnVzdCBHbG9i YWwgQ0EwHhcNMTMwNDA1MTUxNTU1WhcNMTUwNDA0MTUxNTU1WjBJMQswCQYDVQQG EwJVUzETMBEGA1UEChMKR29vZ2xlIEluYzElMCMGA1UEAxMcR29vZ2xlIEludGVy bmV0IEF1dGhvcml0eSBHMjCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB AJwqBHdc2FCROgajguDYUEi8iT/xGXAaiEZ+4I/F8YnOIe5a/mENtzJEiaB0C1NP VaTOgmKV7utZX8bhBYASxF6UP7xbSDj0U/ck5vuR6RXEz/RTDfRK/J9U3n2+oGtv h8DQUB8oMANA2ghzUWx//zo8pzcGjr1LEQTrfSTe5vn8MXH7lNVg8y5Kr0LSy+rE ahqyzFPdFUuLH8gZYR/Nnag+YyuENWllhMgZxUYi+FOVvuOAShDGKuy6lyARxzmZ EASg8GF6lSWMTlJ14rbtCMoU/M4iarNOz0YDl5cDfsCx3nuvRTPPuj5xt970JSXC DTWJnZ37DhF5iR43xa+OcmkCAwEAAaOB+zCB+DAfBgNVHSMEGDAWgBTAephojYn7 qwVkDBF9qn1luMrMTjAdBgNVHQ4EFgQUSt0GFhu89mi1dvWBtrtiGrpagS8wEgYD VR0TAQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8EBAMCAQYwOgYDVR0fBDMwMTAvoC2g K4YpaHR0cDovL2NybC5nZW90cnVzdC5jb20vY3Jscy9ndGdsb2JhbC5jcmwwPQYI KwYBBQUHAQEEMTAvMC0GCCsGAQUFBzABhiFodHRwOi8vZ3RnbG9iYWwtb2NzcC5n ZW90cnVzdC5jb20wFwYDVR0gBBAwDjAMBgorBgEEAdZ5AgUBMA0GCSqGSIb3DQEB BQUAA4IBAQA21waAESetKhSbOHezI6B1WLuxfoNCunLaHtiONgaX4PCVOzf9G0JY /iLIa704XtE7JW4S615ndkZAkNoUyHgN7ZVm2o6Gb4ChulYylYbc3GrKBIxbf/a/ zG+FA1jDaFETzf3I93k9mTXwVqO94FntT0QJo544evZG0R0SnU++0ED8Vf4GXjza HFa9llF7b1cq26KqltyMdMKVvvBulRP/F/A8rLIQjcxz++iPAsbw+zOzlTvjwsto WHPbqCRiOwY1nQ2pM714A5AuTHhdUDqB1O6gyHA43LL5Z/qHQF1hwFGPa4NrzQU6 yuGnBXj8ytqU0CwIPX4WecigUCAkVDNx -----END CERTIFICATE-----` const certPEM = ` -----BEGIN CERTIFICATE----- MIIDujCCAqKgAwIBAgIIE31FZVaPXTUwDQYJKoZIhvcNAQEFBQAwSTELMAkGA1UE BhMCVVMxEzARBgNVBAoTCkdvb2dsZSBJbmMxJTAjBgNVBAMTHEdvb2dsZSBJbnRl cm5ldCBBdXRob3JpdHkgRzIwHhcNMTQwMTI5MTMyNzQzWhcNMTQwNTI5MDAwMDAw WjBpMQswCQYDVQQGEwJVUzETMBEGA1UECAwKQ2FsaWZvcm5pYTEWMBQGA1UEBwwN TW91bnRhaW4gVmlldzETMBEGA1UECgwKR29vZ2xlIEluYzEYMBYGA1UEAwwPbWFp bC5nb29nbGUuY29tMFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcDQgAEfRrObuSW5T7q 5CnSEqefEmtH4CCv6+5EckuriNr1CjfVvqzwfAhopXkLrq45EQm8vkmf7W96XJhC 7ZM0dYi1/qOCAU8wggFLMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjAa BgNVHREEEzARgg9tYWlsLmdvb2dsZS5jb20wCwYDVR0PBAQDAgeAMGgGCCsGAQUF BwEBBFwwWjArBggrBgEFBQcwAoYfaHR0cDovL3BraS5nb29nbGUuY29tL0dJQUcy LmNydDArBggrBgEFBQcwAYYfaHR0cDovL2NsaWVudHMxLmdvb2dsZS5jb20vb2Nz cDAdBgNVHQ4EFgQUiJxtimAuTfwb+aUtBn5UYKreKvMwDAYDVR0TAQH/BAIwADAf BgNVHSMEGDAWgBRK3QYWG7z2aLV29YG2u2IaulqBLzAXBgNVHSAEEDAOMAwGCisG AQQB1nkCBQEwMAYDVR0fBCkwJzAloCOgIYYfaHR0cDovL3BraS5nb29nbGUuY29t L0dJQUcyLmNybDANBgkqhkiG9w0BAQUFAAOCAQEAH6RYHxHdcGpMpFE3oxDoFnP+ gtuBCHan2yE2GRbJ2Cw8Lw0MmuKqHlf9RSeYfd3BXeKkj1qO6TVKwCh+0HdZk283 TZZyzmEOyclm3UGFYe82P/iDFt+CeQ3NpmBg+GoaVCuWAARJN/KfglbLyyYygcQq 0SgeDh8dRKUiaW3HQSoYvTvdTuqzwK4CXsr3b5/dAOY8uMuG/IAR3FgwTbZ1dtoW RvOTa8hYiU6A475WuZKyEHcwnGYe57u2I2KbMgcKjPniocj4QzgYsVAVKW3IwaOh yE+vPxsiUkvQHdO2fojCkY8jg70jxM+gu59tPDNbw3Uh/2Ij310FgTHsnGQMyA== -----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 (c *Certificate) VerifyHostname(h string) error
VerifyHostname returns nil if c is a valid certificate for the named host. Otherwise it returns an error describing the mismatch.
type CertificateInvalidError struct {
Cert *Certificate
Reason InvalidReason
Detail string
}
CertificateInvalidError results when an odd error occurs. Users of this library probably want to handle all these errors uniformly.
func (e CertificateInvalidError) Error() string
type CertificateRequest struct {
Raw []byte // Complete ASN.1 DER content (CSR, signature algorithm and signature).
RawTBSCertificateRequest []byte // Certificate request info part of raw ASN.1 DER content.
RawSubjectPublicKeyInfo []byte // DER encoded SubjectPublicKeyInfo.
RawSubject []byte // DER encoded Subject.
Version int
Signature []byte
SignatureAlgorithm SignatureAlgorithm
PublicKeyAlgorithm PublicKeyAlgorithm
PublicKey interface{}
Subject pkix.Name
// Attributes contains the CSR attributes that can parse as
// pkix.AttributeTypeAndValueSET.
//
// Deprecated: Use Extensions and ExtraExtensions instead for parsing and
// generating the requestedExtensions attribute.
Attributes []pkix.AttributeTypeAndValueSET
// Extensions contains all requested extensions, in raw form. When parsing
// CSRs, this can be used to extract extensions that are not parsed by this
// package.
Extensions []pkix.Extension
// ExtraExtensions contains extensions to be copied, raw, into any CSR
// marshaled by CreateCertificateRequest. Values override any extensions
// that would otherwise be produced based on the other fields but are
// overridden by any extensions specified in Attributes.
//
// The ExtraExtensions field is not populated by ParseCertificateRequest,
// see Extensions instead.
ExtraExtensions []pkix.Extension
// Subject Alternate Name values.
DNSNames []string
EmailAddresses []string
IPAddresses []net.IP
URIs []*url.URL
}
CertificateRequest represents a PKCS #10, certificate signature request.
func ParseCertificateRequest(asn1Data []byte) (*CertificateRequest, error)
ParseCertificateRequest parses a single certificate request from the given ASN.1 DER data.
func (c *CertificateRequest) CheckSignature() error
CheckSignature reports whether the signature on c is valid.
type ConstraintViolationError struct{}
ConstraintViolationError results when a requested usage is not permitted by a certificate. For example: checking a signature when the public key isn't a certificate signing key.
func (ConstraintViolationError) Error() string
type ExtKeyUsage int
ExtKeyUsage represents an extended set of actions that are valid for a given key. Each of the ExtKeyUsage* constants define a unique action.
const (
ExtKeyUsageAny ExtKeyUsage = iota
ExtKeyUsageServerAuth
ExtKeyUsageClientAuth
ExtKeyUsageCodeSigning
ExtKeyUsageEmailProtection
ExtKeyUsageIPSECEndSystem
ExtKeyUsageIPSECTunnel
ExtKeyUsageIPSECUser
ExtKeyUsageTimeStamping
ExtKeyUsageOCSPSigning
ExtKeyUsageMicrosoftServerGatedCrypto
ExtKeyUsageNetscapeServerGatedCrypto
ExtKeyUsageMicrosoftCommercialCodeSigning
ExtKeyUsageMicrosoftKernelCodeSigning
)
type HostnameError struct {
Certificate *Certificate
Host string
}
HostnameError results when the set of authorized names doesn't match the requested name.
func (h HostnameError) Error() string
type InsecureAlgorithmError SignatureAlgorithm
func (e InsecureAlgorithmError) Error() string
type InvalidReason int
const (
// NotAuthorizedToSign results when a certificate is signed by another
// which isn't marked as a CA certificate.
NotAuthorizedToSign InvalidReason = iota
// Expired results when a certificate has expired, based on the time
// given in the VerifyOptions.
Expired
// CANotAuthorizedForThisName results when an intermediate or root
// certificate has a name constraint which doesn't permit a DNS or
// other name (including IP address) in the leaf certificate.
CANotAuthorizedForThisName
// TooManyIntermediates results when a path length constraint is
// violated.
TooManyIntermediates
// IncompatibleUsage results when the certificate's key usage indicates
// that it may only be used for a different purpose.
IncompatibleUsage
// NameMismatch results when the subject name of a parent certificate
// does not match the issuer name in the child.
NameMismatch
// NameConstraintsWithoutSANs results when a leaf certificate doesn't
// contain a Subject Alternative Name extension, but a CA certificate
// contains name constraints, and the Common Name can be interpreted as
// a hostname.
//
// You can avoid this error by setting the experimental GODEBUG environment
// variable to "x509ignoreCN=1", disabling Common Name matching entirely.
// This behavior might become the default in the future.
NameConstraintsWithoutSANs
// UnconstrainedName results when a CA certificate contains permitted
// name constraints, but leaf certificate contains a name of an
// unsupported or unconstrained type.
UnconstrainedName
// TooManyConstraints results when the number of comparison operations
// needed to check a certificate exceeds the limit set by
// VerifyOptions.MaxConstraintComparisions. This limit exists to
// prevent pathological certificates can consuming excessive amounts of
// CPU time to verify.
TooManyConstraints
// CANotAuthorizedForExtKeyUsage results when an intermediate or root
// certificate does not permit a requested extended key usage.
CANotAuthorizedForExtKeyUsage
)
type KeyUsage int
KeyUsage represents the set of actions that are valid for a given key. It's a bitmap of the KeyUsage* constants.
const (
KeyUsageDigitalSignature KeyUsage = 1 << iota
KeyUsageContentCommitment
KeyUsageKeyEncipherment
KeyUsageDataEncipherment
KeyUsageKeyAgreement
KeyUsageCertSign
KeyUsageCRLSign
KeyUsageEncipherOnly
KeyUsageDecipherOnly
)
type PEMCipher int
const (
PEMCipherDES PEMCipher
PEMCipher3DES
PEMCipherAES128
PEMCipherAES192
PEMCipherAES256
)
Possible values for the EncryptPEMBlock encryption algorithm.
type PublicKeyAlgorithm int
const (
UnknownPublicKeyAlgorithm PublicKeyAlgorithm = iota
RSA
DSA
ECDSA
Ed25519
)
func (algo PublicKeyAlgorithm) String() string
type SignatureAlgorithm int
const (
UnknownSignatureAlgorithm SignatureAlgorithm = iota
MD2WithRSA
MD5WithRSA
SHA1WithRSA
SHA256WithRSA
SHA384WithRSA
SHA512WithRSA
DSAWithSHA1
DSAWithSHA256
ECDSAWithSHA1
ECDSAWithSHA256
ECDSAWithSHA384
ECDSAWithSHA512
SHA256WithRSAPSS
SHA384WithRSAPSS
SHA512WithRSAPSS
PureEd25519
)
func (algo SignatureAlgorithm) String() string
type SystemRootsError struct {
Err error
}
SystemRootsError results when we fail to load the system root certificates.
func (se SystemRootsError) Error() string
type UnhandledCriticalExtension struct{}
func (h UnhandledCriticalExtension) Error() string
type UnknownAuthorityError struct {
Cert *Certificate
// contains filtered or unexported fields
}
UnknownAuthorityError results when the certificate issuer is unknown
func (e UnknownAuthorityError) Error() string
type VerifyOptions struct {
DNSName string
Intermediates *CertPool
Roots *CertPool // if nil, the system roots are used
CurrentTime time.Time // if zero, the current time is used
// KeyUsage specifies which Extended Key Usage values are acceptable. A leaf
// certificate is accepted if it contains any of the listed values. An empty
// list means ExtKeyUsageServerAuth. To accept any key usage, include
// ExtKeyUsageAny.
//
// Certificate chains are required to nest these extended key usage values.
// (This matches the Windows CryptoAPI behavior, but not the spec.)
KeyUsages []ExtKeyUsage
// MaxConstraintComparisions is the maximum number of comparisons to
// perform when checking a given certificate's name constraints. If
// zero, a sensible default is used. This limit prevents pathological
// certificates from consuming excessive amounts of CPU time when
// validating.
MaxConstraintComparisions int
}
VerifyOptions contains parameters for Certificate.Verify. It's a structure because other PKIX verification APIs have ended up needing many options.