config

Documentation

Overview

Package config contains the configuration logic for CFSSL.

Index

• Variables
• type AuthKey
• type AuthRemote
• type CAConstraint
• type CSRWhitelist
• type CertificatePolicy
• type CertificatePolicyQualifier
• type Config
  • func LoadConfig(config []byte) (*Config, error)
  • func LoadFile(path string) (*Config, error)
  • func (c *Config) Valid() bool
• type OID
  • func (oid OID) MarshalJSON() ([]byte, error)
  • func (oid *OID) UnmarshalJSON(data []byte) (err error)
• type Signing
  • func (p *Signing) NeedsLocalSigner() bool
  • func (p *Signing) NeedsRemoteSigner() bool
  • func (p *Signing) OverrideRemotes(remote string) error
  • func (p *Signing) SetClientCertKeyPairFromFile(certFile string, keyFile string) error
  • func (p *Signing) SetRemoteCAs(remoteCAs *x509.CertPool)
  • func (p *Signing) SetRemoteCAsFromFile(caFile string) error
  • func (p *Signing) Valid() bool
• type SigningProfile
  • func DefaultConfig() *SigningProfile
  • func (p *SigningProfile) Usages() (ku x509.KeyUsage, eku []x509.ExtKeyUsage, unk []string)

Variables

var ExtKeyUsage = map[string]x509.ExtKeyUsage{
	"any":              x509.ExtKeyUsageAny,
	"server auth":      x509.ExtKeyUsageServerAuth,
	"client auth":      x509.ExtKeyUsageClientAuth,
	"code signing":     x509.ExtKeyUsageCodeSigning,
	"email protection": x509.ExtKeyUsageEmailProtection,
	"s/mime":           x509.ExtKeyUsageEmailProtection,
	"ipsec end system": x509.ExtKeyUsageIPSECEndSystem,
	"ipsec tunnel":     x509.ExtKeyUsageIPSECTunnel,
	"ipsec user":       x509.ExtKeyUsageIPSECUser,
	"timestamping":     x509.ExtKeyUsageTimeStamping,
	"ocsp signing":     x509.ExtKeyUsageOCSPSigning,
	"microsoft sgc":    x509.ExtKeyUsageMicrosoftServerGatedCrypto,
	"netscape sgc":     x509.ExtKeyUsageNetscapeServerGatedCrypto,
}

ExtKeyUsage contains a mapping of string names to extended key usages.

var KeyUsage = map[string]x509.KeyUsage{
	"signing":             x509.KeyUsageDigitalSignature,
	"digital signature":   x509.KeyUsageDigitalSignature,
	"content committment": x509.KeyUsageContentCommitment,
	"key encipherment":    x509.KeyUsageKeyEncipherment,
	"key agreement":       x509.KeyUsageKeyAgreement,
	"data encipherment":   x509.KeyUsageDataEncipherment,
	"cert sign":           x509.KeyUsageCertSign,
	"crl sign":            x509.KeyUsageCRLSign,
	"encipher only":       x509.KeyUsageEncipherOnly,
	"decipher only":       x509.KeyUsageDecipherOnly,
}

KeyUsage contains a mapping of string names to key usages.

Types

type AuthKey

type AuthKey struct {
	// Type contains information needed to select the appropriate
	// constructor. For example, "standard" for HMAC-SHA-256,
	// "standard-ip" for HMAC-SHA-256 incorporating the client's
	// IP.
	Type string `json:"type"`
	// Key contains the key information, such as a hex-encoded
	// HMAC key.
	Key string `json:"key"`
}

An AuthKey contains an entry for a key used for authentication.

type AuthRemote

type AuthRemote struct {
	RemoteName  string `json:"remote"`
	AuthKeyName string `json:"auth_key"`
}

AuthRemote is an authenticated remote signer.

type CAConstraint

type CAConstraint struct {
	IsCA           bool `json:"is_ca"`
	MaxPathLen     int  `json:"max_path_len"`
	MaxPathLenZero bool `json:"max_path_len_zero"`
}

CAConstraint specifies various CA constraints on the signed certificate. CAConstraint would verify against (and override) the CA extensions in the given CSR.

type CSRWhitelist

type CSRWhitelist struct {
	Subject, PublicKeyAlgorithm, PublicKey, SignatureAlgorithm bool
	DNSNames, IPAddresses, EmailAddresses                      bool
}

A CSRWhitelist stores booleans for fields in the CSR. If a CSRWhitelist is not present in a SigningProfile, all of these fields may be copied from the CSR into the signed certificate. If a CSRWhitelist *is* present in a SigningProfile, only those fields with a `true` value in the CSRWhitelist may be copied from the CSR to the signed certificate. Note that some of these fields, like Subject, can be provided or partially provided through the API. Since API clients are expected to be trusted, but CSRs are not, fields provided through the API are not subject to whitelisting through this mechanism.

type CertificatePolicy

type CertificatePolicy struct {
	ID         OID
	Qualifiers []CertificatePolicyQualifier
}

CertificatePolicy represents the ASN.1 PolicyInformation structure from https://tools.ietf.org/html/rfc3280.html#page-106. Valid values of Type are "id-qt-unotice" and "id-qt-cps"

type CertificatePolicyQualifier

type CertificatePolicyQualifier struct {
	Type  string
	Value string
}

CertificatePolicyQualifier represents a single qualifier from an ASN.1 PolicyInformation structure.

type Config

type Config struct {
	Signing  *Signing           `json:"signing"`
	OCSP     *ocspConfig.Config `json:"ocsp"`
	AuthKeys map[string]AuthKey `json:"auth_keys,omitempty"`
	Remotes  map[string]string  `json:"remotes,omitempty"`
}

Config stores configuration information for the CA.

func LoadConfig

func LoadConfig(config []byte) (*Config, error)

LoadConfig attempts to load the configuration from a byte slice. On error, it returns nil.

func LoadFile

func LoadFile(path string) (*Config, error)

LoadFile attempts to load the configuration file stored at the path and returns the configuration. On error, it returns nil.

func (*Config) Valid

func (c *Config) Valid() bool

Valid ensures that Config is a valid configuration. It should be called immediately after parsing a configuration file.

type OID

type OID asn1.ObjectIdentifier

OID is our own version of asn1's ObjectIdentifier, so we can define a custom JSON marshal / unmarshal.

func (OID) MarshalJSON

func (oid OID) MarshalJSON() ([]byte, error)

MarshalJSON marshals an oid into a JSON string.

func (*OID) UnmarshalJSON

func (oid *OID) UnmarshalJSON(data []byte) (err error)

UnmarshalJSON unmarshals a JSON string into an OID.

type Signing

type Signing struct {
	Profiles map[string]*SigningProfile `json:"profiles"`
	Default  *SigningProfile            `json:"default"`
}

Signing codifies the signature configuration policy for a CA.

func (*Signing) NeedsLocalSigner

func (p *Signing) NeedsLocalSigner() bool

NeedsLocalSigner returns true if one of the profiles doe not have a remote set

func (*Signing) NeedsRemoteSigner

func (p *Signing) NeedsRemoteSigner() bool

NeedsRemoteSigner returns true if one of the profiles has a remote set

func (*Signing) OverrideRemotes

func (p *Signing) OverrideRemotes(remote string) error

OverrideRemotes takes a signing configuration and updates the remote server object to the hostname:port combination sent by remote

func (*Signing) SetClientCertKeyPairFromFile

func (p *Signing) SetClientCertKeyPairFromFile(certFile string, keyFile string) error

SetClientCertKeyPairFromFile updates the properties to set client certificates for mutual authenticated TLS remote requests

func (*Signing) SetRemoteCAs

func (p *Signing) SetRemoteCAs(remoteCAs *x509.CertPool)

SetRemoteCAs updates the properties to set remote CAs for TLS remote requests

func (*Signing) SetRemoteCAsFromFile

func (p *Signing) SetRemoteCAsFromFile(caFile string) error

SetRemoteCAsFromFile reads root CAs from file and updates the properties to set remote CAs for TLS remote requests

func (*Signing) Valid

func (p *Signing) Valid() bool

Valid checks the signature policies, ensuring they are valid policies. A policy is valid if it has defined at least key usages to be used, and a valid default profile has defined at least a default expiration.

type SigningProfile

type SigningProfile struct {
	Usage               []string     `json:"usages"`
	IssuerURL           []string     `json:"issuer_urls"`
	OCSP                string       `json:"ocsp_url"`
	CRL                 string       `json:"crl_url"`
	CAConstraint        CAConstraint `json:"ca_constraint"`
	OCSPNoCheck         bool         `json:"ocsp_no_check"`
	ExpiryString        string       `json:"expiry"`
	BackdateString      string       `json:"backdate"`
	AuthKeyName         string       `json:"auth_key"`
	RemoteName          string       `json:"remote"`
	NotBefore           time.Time    `json:"not_before"`
	NotAfter            time.Time    `json:"not_after"`
	NameWhitelistString string       `json:"name_whitelist"`
	AuthRemote          AuthRemote   `json:"auth_remote"`
	CTLogServers        []string     `json:"ct_log_servers"`
	AllowedExtensions   []OID        `json:"allowed_extensions"`
	CertStore           string       `json:"cert_store"`

	Policies                    []CertificatePolicy
	Expiry                      time.Duration
	Backdate                    time.Duration
	Provider                    auth.Provider
	RemoteProvider              auth.Provider
	RemoteServer                string
	RemoteCAs                   *x509.CertPool
	ClientCert                  *tls.Certificate
	CSRWhitelist                *CSRWhitelist
	NameWhitelist               *regexp.Regexp
	ExtensionWhitelist          map[string]bool
	ClientProvidesSerialNumbers bool
}

A SigningProfile stores information that the CA needs to store signature policy.

func DefaultConfig

func DefaultConfig() *SigningProfile

DefaultConfig returns a default configuration specifying basic key usage and a 1 year expiration time. The key usages chosen are signing, key encipherment, client auth and server auth.

func (*SigningProfile) Usages

func (p *SigningProfile) Usages() (ku x509.KeyUsage, eku []x509.ExtKeyUsage, unk []string)

Usages parses the list of key uses in the profile, translating them to a list of X.509 key usages and extended key usages. The unknown uses are collected into a slice that is also returned.