core

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Version: v0.0.0-...-2a26294 Latest Latest
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Published: Nov 29, 2021 License: MPL-2.0 Imports: 31 Imported by: 57

Documentation

Index

Constants

View Source
const (
	StatusUnknown     = AcmeStatus("unknown")     // Unknown status; the default
	StatusPending     = AcmeStatus("pending")     // In process; client has next action
	StatusProcessing  = AcmeStatus("processing")  // In process; server has next action
	StatusReady       = AcmeStatus("ready")       // Order is ready for finalization
	StatusValid       = AcmeStatus("valid")       // Object is valid
	StatusInvalid     = AcmeStatus("invalid")     // Validation failed
	StatusRevoked     = AcmeStatus("revoked")     // Object no longer valid
	StatusDeactivated = AcmeStatus("deactivated") // Object has been deactivated
)

These statuses are the states of authorizations, challenges, and registrations

View Source
const (
	ResourceNewReg       = AcmeResource("new-reg")
	ResourceNewAuthz     = AcmeResource("new-authz")
	ResourceNewCert      = AcmeResource("new-cert")
	ResourceRevokeCert   = AcmeResource("revoke-cert")
	ResourceRegistration = AcmeResource("reg")
	ResourceChallenge    = AcmeResource("challenge")
	ResourceAuthz        = AcmeResource("authz")
	ResourceKeyChange    = AcmeResource("key-change")
)

The types of ACME resources

View Source
const (
	ChallengeTypeHTTP01    = AcmeChallenge("http-01")
	ChallengeTypeDNS01     = AcmeChallenge("dns-01")
	ChallengeTypeTLSALPN01 = AcmeChallenge("tls-alpn-01")
)

These types are the available challenges TODO(#5009): Make this a custom type as well.

View Source
const (
	OCSPStatusGood    = OCSPStatus("good")
	OCSPStatusRevoked = OCSPStatus("revoked")
)

These status are the states of OCSP

View Source
const DNSPrefix = "_acme-challenge"

DNSPrefix is attached to DNS names in DNS challenges

Variables

View Source
var BuildHost string

BuildHost is set by the compiler and is used by GetBuildHost

View Source
var BuildID string

BuildID is set by the compiler (using -ldflags "-X core.BuildID $(git rev-parse --short HEAD)") and is used by GetBuildID

View Source
var BuildTime string

BuildTime is set by the compiler and is used by GetBuildTime

View Source
var RandReader randSource = rand.Reader

RandReader is used so that it can be replaced in tests that require deterministic output

Functions

func Fingerprint256

func Fingerprint256(data []byte) string

Fingerprint256 produces an unpadded, URL-safe Base64-encoded SHA256 digest of the data.

func GetBuildHost

func GetBuildHost() (retID string)

GetBuildHost identifies the building host

func GetBuildID

func GetBuildID() (retID string)

GetBuildID identifies what build is running.

func GetBuildTime

func GetBuildTime() (retID string)

GetBuildTime identifies when this build was made

func IsASCII

func IsASCII(str string) bool

IsASCII determines if every character in a string is encoded in the ASCII character set.

func IsAnyNilOrZero

func IsAnyNilOrZero(vals ...interface{}) bool

IsAnyNilOrZero returns whether any of the supplied values are nil, or (if not) if any of them is its type's zero-value. This is useful for validating that all required fields on a proto message are present.

func KeyDigestB64

func KeyDigestB64(key crypto.PublicKey) (string, error)

KeyDigestB64 produces a padded, standard Base64-encoded SHA256 digest of a provided public key.

func KeyDigestEquals

func KeyDigestEquals(j, k crypto.PublicKey) bool

KeyDigestEquals determines whether two public keys have the same digest.

func LoadCert

func LoadCert(filename string) (*x509.Certificate, error)

LoadCert loads a PEM certificate specified by filename or returns an error

func LooksLikeAToken

func LooksLikeAToken(token string) bool

LooksLikeAToken checks whether a string represents a 32-octet value in the URL-safe base64 alphabet.

func NewToken

func NewToken() string

NewToken produces a random string for Challenges, etc.

func PublicKeysEqual

func PublicKeysEqual(a, b interface{}) (bool, error)

PublicKeysEqual determines whether two public keys have the same marshalled bytes as one another

func RandomString

func RandomString(byteLength int) string

RandomString returns a randomly generated string of the requested length.

func RetryBackoff

func RetryBackoff(retries int, base, max time.Duration, factor float64) time.Duration

RetryBackoff calculates a backoff time based on number of retries, will always add jitter so requests that start in unison won't fall into lockstep. Because of this the returned duration can always be larger than the maximum by a factor of retryJitter. Adapted from https://github.com/grpc/grpc-go/blob/v1.11.3/backoff.go#L77-L96

func SerialToString

func SerialToString(serial *big.Int) string

SerialToString converts a certificate serial number (big.Int) to a String consistently.

func StringToSerial

func StringToSerial(serial string) (*big.Int, error)

StringToSerial converts a string into a certificate serial number (big.Int) consistently.

func UniqueLowerNames

func UniqueLowerNames(names []string) (unique []string)

UniqueLowerNames returns the set of all unique names in the input after all of them are lowercased. The returned names will be in their lowercased form and sorted alphabetically.

func ValidSerial

func ValidSerial(serial string) bool

ValidSerial tests whether the input string represents a syntactically valid serial number, i.e., that it is a valid hex string between 32 and 36 characters long.

Types

type AcmeChallenge

type AcmeChallenge string

AcmeChallenge values identify different types of ACME challenges

func (AcmeChallenge) IsValid

func (c AcmeChallenge) IsValid() bool

IsValid tests whether the challenge is a known challenge

type AcmeResource

type AcmeResource string

AcmeResource values identify different types of ACME resources

type AcmeStatus

type AcmeStatus string

AcmeStatus defines the state of a given authorization

type Authorization

type Authorization struct {
	// An identifier for this authorization, unique across
	// authorizations and certificates within this instance.
	ID string `json:"id,omitempty" db:"id"`

	// The identifier for which authorization is being given
	Identifier identifier.ACMEIdentifier `json:"identifier,omitempty" db:"identifier"`

	// The registration ID associated with the authorization
	RegistrationID int64 `json:"regId,omitempty" db:"registrationID"`

	// The status of the validation of this authorization
	Status AcmeStatus `json:"status,omitempty" db:"status"`

	// The date after which this authorization will be no
	// longer be considered valid. Note: a certificate may be issued even on the
	// last day of an authorization's lifetime. The last day for which someone can
	// hold a valid certificate based on an authorization is authorization
	// lifetime + certificate lifetime.
	Expires *time.Time `json:"expires,omitempty" db:"expires"`

	// An array of challenges objects used to validate the
	// applicant's control of the identifier.  For authorizations
	// in process, these are challenges to be fulfilled; for
	// final authorizations, they describe the evidence that
	// the server used in support of granting the authorization.
	//
	// There should only ever be one challenge of each type in this
	// slice and the order of these challenges may not be predictable.
	Challenges []Challenge `json:"challenges,omitempty" db:"-"`

	// This field is deprecated. It's filled in by WFE for the ACMEv1 API.
	Combinations [][]int `json:"combinations,omitempty" db:"combinations"`

	// Wildcard is a Boulder-specific Authorization field that indicates the
	// authorization was created as a result of an order containing a name with
	// a `*.`wildcard prefix. This will help convey to users that an
	// Authorization with the identifier `example.com` and one DNS-01 challenge
	// corresponds to a name `*.example.com` from an associated order.
	Wildcard bool `json:"wildcard,omitempty" db:"-"`
}

Authorization represents the authorization of an account key holder to act on behalf of a domain. This struct is intended to be used both internally and for JSON marshaling on the wire. Any fields that should be suppressed on the wire (e.g., ID, regID) must be made empty before marshaling.

func (*Authorization) FindChallengeByStringID

func (authz *Authorization) FindChallengeByStringID(id string) int

FindChallengeByStringID will look for a challenge matching the given ID inside this authorization. If found, it will return the index of that challenge within the Authorization's Challenges array. Otherwise it will return -1.

func (*Authorization) SolvedBy

func (authz *Authorization) SolvedBy() (*AcmeChallenge, error)

SolvedBy will look through the Authorizations challenges, returning the type of the *first* challenge it finds with Status: valid, or an error if no challenge is valid.

type CertDER

type CertDER []byte

CertDER is a convenience type that helps differentiate what the underlying byte slice contains

type Certificate

type Certificate struct {
	ID             int64 `db:"id"`
	RegistrationID int64 `db:"registrationID"`

	Serial  string    `db:"serial"`
	Digest  string    `db:"digest"`
	DER     []byte    `db:"der"`
	Issued  time.Time `db:"issued"`
	Expires time.Time `db:"expires"`
}

Certificate objects are entirely internal to the server. The only thing exposed on the wire is the certificate itself.

type CertificateRequest

type CertificateRequest struct {
	CSR   *x509.CertificateRequest // The CSR
	Bytes []byte                   // The original bytes of the CSR, for logging.
}

CertificateRequest is just a CSR

This data is unmarshalled from JSON by way of RawCertificateRequest, which represents the actual structure received from the client.

func (CertificateRequest) MarshalJSON

func (cr CertificateRequest) MarshalJSON() ([]byte, error)

MarshalJSON provides an implementation for encoding CertificateRequest objects.

func (*CertificateRequest) UnmarshalJSON

func (cr *CertificateRequest) UnmarshalJSON(data []byte) error

UnmarshalJSON provides an implementation for decoding CertificateRequest objects.

type CertificateStatus

type CertificateStatus struct {
	ID     int64  `db:"id"`
	Serial string `db:"serial"`

	// status: 'good' or 'revoked'. Note that good, expired certificates remain
	//   with status 'good' but don't necessarily get fresh OCSP responses.
	Status OCSPStatus `db:"status"`

	// ocspLastUpdated: The date and time of the last time we generated an OCSP
	//   response. If we have never generated one, this has the zero value of
	//   time.Time, i.e. Jan 1 1970.
	OCSPLastUpdated time.Time `db:"ocspLastUpdated"`

	// revokedDate: If status is 'revoked', this is the date and time it was
	//   revoked. Otherwise it has the zero value of time.Time, i.e. Jan 1 1970.
	RevokedDate time.Time `db:"revokedDate"`

	// revokedReason: If status is 'revoked', this is the reason code for the
	//   revocation. Otherwise it is zero (which happens to be the reason
	//   code for 'unspecified').
	RevokedReason revocation.Reason `db:"revokedReason"`

	LastExpirationNagSent time.Time `db:"lastExpirationNagSent"`

	// The encoded and signed OCSP response.
	OCSPResponse []byte `db:"ocspResponse"`

	// For performance reasons[0] we duplicate the `Expires` field of the
	// `Certificates` object/table in `CertificateStatus` to avoid a costly `JOIN`
	// later on just to retrieve this `Time` value. This helps both the OCSP
	// updater and the expiration-mailer stay performant.
	//
	// Similarly, we add an explicit `IsExpired` boolean to `CertificateStatus`
	// table that the OCSP updater so that the database can create a meaningful
	// index on `(isExpired, ocspLastUpdated)` without a `JOIN` on `certificates`.
	// For more detail see Boulder #1864[0].
	//
	// [0]: https://github.com/letsencrypt/boulder/issues/1864
	NotAfter  time.Time `db:"notAfter"`
	IsExpired bool      `db:"isExpired"`

	// TODO(#5152): Change this to an issuance.Issuer(Name)ID after it no longer
	// has to support both IssuerNameIDs and IssuerIDs.
	IssuerID int64
}

CertificateStatus structs are internal to the server. They represent the latest data about the status of the certificate, required for OCSP updating and for validating that the subscriber has accepted the certificate.

type Challenge

type Challenge struct {
	// The type of challenge
	Type AcmeChallenge `json:"type"`

	// The status of this challenge
	Status AcmeStatus `json:"status,omitempty"`

	// Contains the error that occurred during challenge validation, if any
	Error *probs.ProblemDetails `json:"error,omitempty"`

	// A URI to which a response can be POSTed
	URI string `json:"uri,omitempty"`

	// For the V2 API the "URI" field is deprecated in favour of URL.
	URL string `json:"url,omitempty"`

	// Used by http-01, tls-sni-01, tls-alpn-01 and dns-01 challenges
	Token string `json:"token,omitempty"`

	// The expected KeyAuthorization for validation of the challenge. Populated by
	// the RA prior to passing the challenge to the VA. For legacy reasons this
	// field is called "ProvidedKeyAuthorization" because it was initially set by
	// the content of the challenge update POST from the client. It is no longer
	// set that way and should be renamed to "KeyAuthorization".
	// TODO(@cpu): Rename `ProvidedKeyAuthorization` to `KeyAuthorization`.
	ProvidedKeyAuthorization string `json:"keyAuthorization,omitempty"`

	// Contains information about URLs used or redirected to and IPs resolved and
	// used
	ValidationRecord []ValidationRecord `json:"validationRecord,omitempty"`
	// The time at which the server validated the challenge. Required by
	// RFC8555 if status is valid.
	Validated *time.Time `json:"validated,omitempty"`
}

Challenge is an aggregate of all data needed for any challenges.

Rather than define individual types for different types of challenge, we just throw all the elements into one bucket, together with the common metadata elements.

func DNSChallenge01

func DNSChallenge01(token string) Challenge

DNSChallenge01 constructs a random dns-01 challenge. If token is empty a random token will be generated, otherwise the provided token is used.

func HTTPChallenge01

func HTTPChallenge01(token string) Challenge

HTTPChallenge01 constructs a random http-01 challenge. If token is empty a random token will be generated, otherwise the provided token is used.

func TLSALPNChallenge01

func TLSALPNChallenge01(token string) Challenge

TLSALPNChallenge01 constructs a random tls-alpn-01 challenge. If token is empty a random token will be generated, otherwise the provided token is used.

func (Challenge) CheckConsistencyForClientOffer

func (ch Challenge) CheckConsistencyForClientOffer() error

CheckConsistencyForClientOffer checks the fields of a challenge object before it is given to the client.

func (Challenge) CheckConsistencyForValidation

func (ch Challenge) CheckConsistencyForValidation() error

CheckConsistencyForValidation checks the fields of a challenge object before it is given to the VA.

func (Challenge) ExpectedKeyAuthorization

func (ch Challenge) ExpectedKeyAuthorization(key *jose.JSONWebKey) (string, error)

ExpectedKeyAuthorization computes the expected KeyAuthorization value for the challenge.

func (Challenge) RecordsSane

func (ch Challenge) RecordsSane() bool

RecordsSane checks the sanity of a ValidationRecord object before sending it back to the RA to be stored.

func (Challenge) StringID

func (ch Challenge) StringID() string

StringID is used to generate a ID for challenges associated with new style authorizations. This is necessary as these challenges no longer have a unique non-sequential identifier in the new storage scheme. This identifier is generated by constructing a fnv hash over the challenge token and type and encoding the first 4 bytes of it using the base64 URL encoding.

type FQDNSet

type FQDNSet struct {
	ID      int64
	SetHash []byte
	Serial  string
	Issued  time.Time
	Expires time.Time
}

FQDNSet contains the SHA256 hash of the lowercased, comma joined dNSNames contained in a certificate.

type JSONBuffer

type JSONBuffer []byte

JSONBuffer fields get encoded and decoded JOSE-style, in base64url encoding with stripped padding.

func (JSONBuffer) MarshalJSON

func (jb JSONBuffer) MarshalJSON() (result []byte, err error)

MarshalJSON encodes a JSONBuffer for transmission.

func (*JSONBuffer) UnmarshalJSON

func (jb *JSONBuffer) UnmarshalJSON(data []byte) (err error)

UnmarshalJSON decodes a JSONBuffer to an object.

type OCSPStatus

type OCSPStatus string

OCSPStatus defines the state of OCSP for a domain

type PolicyAuthority

type PolicyAuthority interface {
	WillingToIssue(domain identifier.ACMEIdentifier) error
	WillingToIssueWildcards(identifiers []identifier.ACMEIdentifier) error
	ChallengesFor(domain identifier.ACMEIdentifier) ([]Challenge, error)
	ChallengeTypeEnabled(t AcmeChallenge) bool
}

PolicyAuthority defines the public interface for the Boulder PA

type RawCertificateRequest

type RawCertificateRequest struct {
	CSR JSONBuffer `json:"csr"` // The encoded CSR
}

type Registration

type Registration struct {
	// Unique identifier
	ID int64 `json:"id,omitempty" db:"id"`

	// Account key to which the details are attached
	Key *jose.JSONWebKey `json:"key"`

	// Contact URIs
	Contact *[]string `json:"contact,omitempty"`

	// Agreement with terms of service
	Agreement string `json:"agreement,omitempty"`

	// InitialIP is the IP address from which the registration was created
	InitialIP net.IP `json:"initialIp"`

	// CreatedAt is the time the registration was created.
	CreatedAt *time.Time `json:"createdAt,omitempty"`

	Status AcmeStatus `json:"status"`
}

Registration objects represent non-public metadata attached to account keys.

type RenewalInfo

type RenewalInfo struct {
	SuggestedWindow SuggestedWindow `json:"suggestedWindow"`
}

RenewalInfo is a type which is exposed to clients which query the renewalInfo endpoint specified in draft-aaron-ari.

type SCTDERs

type SCTDERs [][]byte

SCTDERs is a convenience type

type Sha256Digest

type Sha256Digest [sha256.Size]byte

func KeyDigest

func KeyDigest(key crypto.PublicKey) (Sha256Digest, error)

KeyDigest produces a Base64-encoded SHA256 digest of a provided public key.

type SuggestedWindow

type SuggestedWindow struct {
	Start time.Time `json:"start"`
	End   time.Time `json:"end"`
}

SuggestedWindow is a type exposed inside the RenewalInfo resource.

type ValidationRecord

type ValidationRecord struct {
	// SimpleHTTP only
	URL string `json:"url,omitempty"`

	// Shared
	Hostname          string   `json:"hostname"`
	Port              string   `json:"port,omitempty"`
	AddressesResolved []net.IP `json:"addressesResolved,omitempty"`
	AddressUsed       net.IP   `json:"addressUsed,omitempty"`
	// AddressesTried contains a list of addresses tried before the `AddressUsed`.
	// Presently this will only ever be one IP from `AddressesResolved` since the
	// only retry is in the case of a v6 failure with one v4 fallback. E.g. if
	// a record with `AddressesResolved: { 127.0.0.1, ::1 }` were processed for
	// a challenge validation with the IPv6 first flag on and the ::1 address
	// failed but the 127.0.0.1 retry succeeded then the record would end up
	// being:
	// {
	//   ...
	//   AddressesResolved: [ 127.0.0.1, ::1 ],
	//   AddressUsed: 127.0.0.1
	//   AddressesTried: [ ::1 ],
	//   ...
	// }
	AddressesTried []net.IP `json:"addressesTried,omitempty"`
}

ValidationRecord represents a validation attempt against a specific URL/hostname and the IP addresses that were resolved and used

type WebFrontEnd

type WebFrontEnd interface {
	// Set the base URL for authorizations
	SetAuthzBase(ctx context.Context, path string)

	// Set the base URL for certificates
	SetCertBase(ctx context.Context, path string)

	// This method represents the ACME new-registration resource
	NewRegistration(ctx context.Context, response http.ResponseWriter, request *http.Request)

	// This method represents the ACME new-authorization resource
	NewAuthz(ctx context.Context, response http.ResponseWriter, request *http.Request)

	// This method represents the ACME new-certificate resource
	NewCert(ctx context.Context, response http.ResponseWriter, request *http.Request)

	// Provide access to requests for registration resources
	Registration(ctx context.Context, response http.ResponseWriter, request *http.Request)

	// Provide access to requests for authorization resources
	Authz(ctx context.Context, response http.ResponseWriter, request *http.Request)

	// Provide access to requests for authorization resources
	Cert(ctx context.Context, response http.ResponseWriter, request *http.Request)
}

A WebFrontEnd object supplies methods that can be hooked into the Go http module's server functions, principally http.HandleFunc()

It also provides methods to configure the base for authorization and certificate URLs.

It is assumed that the ACME server is laid out as follows: * One URL for new-authorization -> NewAuthz * One URL for new-certificate -> NewCert * One path for authorizations -> Authz * One path for certificates -> Cert

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