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caddy/modules/caddypki/acmeserver/policy.go
Mohammed Al Sahaf 931656bd68
acmeserver: add policy field to define allow/deny rules (#5796)
* acmeserver: support specifying the allowed challenge types

* add caddyfile adapt tests

* acmeserver: add `policy` field to define allow/deny rules

* allow `omitempty` to work

* add caddyfile support for `policy`

* remove "uri domain" policy

* fmt the files

* add docs

* do not support `CommonName`; the field is deprecated

* r/DNSDomains/Domains/g

* Caddyfile docs

* add tests

* move `Policy` to top of file
2024-02-24 02:26:00 +03:00

83 lines
2.8 KiB
Go

package acmeserver
import (
"github.com/smallstep/certificates/authority/policy"
"github.com/smallstep/certificates/authority/provisioner"
)
// Policy defines the criteria for the ACME server
// of when to issue a certificate. Refer to the
// [Certificate Issuance Policy](https://smallstep.com/docs/step-ca/policies/)
// on Smallstep website for the evaluation criteria.
type Policy struct {
// If a rule set is configured to allow a certain type of name,
// all other types of names are automatically denied.
Allow *RuleSet `json:"allow,omitempty"`
// If a rule set is configured to deny a certain type of name,
// all other types of names are still allowed.
Deny *RuleSet `json:"deny,omitempty"`
// If set to true, the ACME server will allow issuing wildcard certificates.
AllowWildcardNames bool `json:"allow_wildcard_names,omitempty"`
}
// RuleSet is the specific set of SAN criteria for a certificate
// to be issued or denied.
type RuleSet struct {
// Domains is a list of DNS domains that are allowed to be issued.
// It can be in the form of FQDN for specific domain name, or
// a wildcard domain name format, e.g. *.example.com, to allow
// sub-domains of a domain.
Domains []string `json:"domains,omitempty"`
// IP ranges in the form of CIDR notation or specific IP addresses
// to be approved or denied for certificates. Non-CIDR IP addresses
// are matched exactly.
IPRanges []string `json:"ip_ranges,omitempty"`
}
// normalizeAllowRules returns `nil` if policy is nil, the `Allow` rule is `nil`,
// or all rules within the `Allow` rule are empty. Otherwise, it returns the X509NameOptions
// with the content of the `Allow` rule.
func (p *Policy) normalizeAllowRules() *policy.X509NameOptions {
if (p == nil) || (p.Allow == nil) || (len(p.Allow.Domains) == 0 && len(p.Allow.IPRanges) == 0) {
return nil
}
return &policy.X509NameOptions{
DNSDomains: p.Allow.Domains,
IPRanges: p.Allow.IPRanges,
}
}
// normalizeDenyRules returns `nil` if policy is nil, the `Deny` rule is `nil`,
// or all rules within the `Deny` rule are empty. Otherwise, it returns the X509NameOptions
// with the content of the `Deny` rule.
func (p *Policy) normalizeDenyRules() *policy.X509NameOptions {
if (p == nil) || (p.Deny == nil) || (len(p.Deny.Domains) == 0 && len(p.Deny.IPRanges) == 0) {
return nil
}
return &policy.X509NameOptions{
DNSDomains: p.Deny.Domains,
IPRanges: p.Deny.IPRanges,
}
}
// normalizeRules returns `nil` if policy is nil, the `Allow` and `Deny` rules are `nil`,
func (p *Policy) normalizeRules() *provisioner.X509Options {
if p == nil {
return nil
}
allow := p.normalizeAllowRules()
deny := p.normalizeDenyRules()
if allow == nil && deny == nil && !p.AllowWildcardNames {
return nil
}
return &provisioner.X509Options{
AllowedNames: allow,
DeniedNames: deny,
AllowWildcardNames: p.AllowWildcardNames,
}
}