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137 lines
6.3 KiB
137 lines
6.3 KiB
// Copyright 2020 Matthew Holt
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package acme
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import "fmt"
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// Problem carries the details of an error from HTTP APIs as
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// defined in RFC 7807: https://tools.ietf.org/html/rfc7807
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// and as extended by RFC 8555 §6.7:
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// https://tools.ietf.org/html/rfc8555#section-6.7
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type Problem struct {
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// "type" (string) - A URI reference [RFC3986] that identifies the
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// problem type. This specification encourages that, when
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// dereferenced, it provide human-readable documentation for the
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// problem type (e.g., using HTML [W3C.REC-html5-20141028]). When
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// this member is not present, its value is assumed to be
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// "about:blank". §3.1
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Type string `json:"type"`
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// "title" (string) - A short, human-readable summary of the problem
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// type. It SHOULD NOT change from occurrence to occurrence of the
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// problem, except for purposes of localization (e.g., using
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// proactive content negotiation; see [RFC7231], Section 3.4). §3.1
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Title string `json:"title,omitempty"`
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// "status" (number) - The HTTP status code ([RFC7231], Section 6)
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// generated by the origin server for this occurrence of the problem.
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// §3.1
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Status int `json:"status,omitempty"`
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// "detail" (string) - A human-readable explanation specific to this
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// occurrence of the problem. §3.1
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//
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// RFC 8555 §6.7: "Clients SHOULD display the 'detail' field of all
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// errors."
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Detail string `json:"detail,omitempty"`
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// "instance" (string) - A URI reference that identifies the specific
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// occurrence of the problem. It may or may not yield further
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// information if dereferenced. §3.1
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Instance string `json:"instance,omitempty"`
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// "Sometimes a CA may need to return multiple errors in response to a
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// request. Additionally, the CA may need to attribute errors to
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// specific identifiers. For instance, a newOrder request may contain
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// multiple identifiers for which the CA cannot issue certificates. In
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// this situation, an ACME problem document MAY contain the
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// 'subproblems' field, containing a JSON array of problem documents."
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// RFC 8555 §6.7.1
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Subproblems []Subproblem `json:"subproblems,omitempty"`
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// For convenience, we've added this field to associate with a value
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// that is related to or caused the problem. It is not part of the
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// spec, but, if a challenge fails for example, we can associate the
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// error with the problematic authz object by setting this field.
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// Challenge failures will have this set to an Authorization type.
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Resource interface{} `json:"-"`
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}
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func (p Problem) Error() string {
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// TODO: 7.3.3: Handle changes to Terms of Service (notice it uses the Instance field and Link header)
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// RFC 8555 §6.7: "Clients SHOULD display the 'detail' field of all errors."
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s := fmt.Sprintf("HTTP %d %s - %s", p.Status, p.Type, p.Detail)
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if len(p.Subproblems) > 0 {
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for _, v := range p.Subproblems {
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s += fmt.Sprintf(", problem %q: %s", v.Type, v.Detail)
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}
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}
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if p.Instance != "" {
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s += ", url: " + p.Instance
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}
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return s
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}
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// Subproblem describes a more specific error in a problem according to
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// RFC 8555 §6.7.1: "An ACME problem document MAY contain the
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// 'subproblems' field, containing a JSON array of problem documents,
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// each of which MAY contain an 'identifier' field."
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type Subproblem struct {
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Problem
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// "If present, the 'identifier' field MUST contain an ACME
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// identifier (Section 9.7.7)." §6.7.1
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Identifier Identifier `json:"identifier,omitempty"`
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}
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// Standard token values for the "type" field of problems, as defined
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// in RFC 8555 §6.7: https://tools.ietf.org/html/rfc8555#section-6.7
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//
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// "To facilitate automatic response to errors, this document defines the
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// following standard tokens for use in the 'type' field (within the
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// ACME URN namespace 'urn:ietf:params:acme:error:') ... This list is not
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// exhaustive. The server MAY return errors whose 'type' field is set to
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// a URI other than those defined above."
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const (
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// The ACME error URN prefix.
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ProblemTypeNamespace = "urn:ietf:params:acme:error:"
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ProblemTypeAccountDoesNotExist = ProblemTypeNamespace + "accountDoesNotExist"
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ProblemTypeAlreadyRevoked = ProblemTypeNamespace + "alreadyRevoked"
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ProblemTypeBadCSR = ProblemTypeNamespace + "badCSR"
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ProblemTypeBadNonce = ProblemTypeNamespace + "badNonce"
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ProblemTypeBadPublicKey = ProblemTypeNamespace + "badPublicKey"
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ProblemTypeBadRevocationReason = ProblemTypeNamespace + "badRevocationReason"
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ProblemTypeBadSignatureAlgorithm = ProblemTypeNamespace + "badSignatureAlgorithm"
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ProblemTypeCAA = ProblemTypeNamespace + "caa"
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ProblemTypeCompound = ProblemTypeNamespace + "compound"
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ProblemTypeConnection = ProblemTypeNamespace + "connection"
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ProblemTypeDNS = ProblemTypeNamespace + "dns"
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ProblemTypeExternalAccountRequired = ProblemTypeNamespace + "externalAccountRequired"
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ProblemTypeIncorrectResponse = ProblemTypeNamespace + "incorrectResponse"
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ProblemTypeInvalidContact = ProblemTypeNamespace + "invalidContact"
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ProblemTypeMalformed = ProblemTypeNamespace + "malformed"
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ProblemTypeOrderNotReady = ProblemTypeNamespace + "orderNotReady"
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ProblemTypeRateLimited = ProblemTypeNamespace + "rateLimited"
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ProblemTypeRejectedIdentifier = ProblemTypeNamespace + "rejectedIdentifier"
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ProblemTypeServerInternal = ProblemTypeNamespace + "serverInternal"
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ProblemTypeTLS = ProblemTypeNamespace + "tls"
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ProblemTypeUnauthorized = ProblemTypeNamespace + "unauthorized"
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ProblemTypeUnsupportedContact = ProblemTypeNamespace + "unsupportedContact"
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ProblemTypeUnsupportedIdentifier = ProblemTypeNamespace + "unsupportedIdentifier"
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ProblemTypeUserActionRequired = ProblemTypeNamespace + "userActionRequired"
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)
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