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implement ACME external account binding (EAB)

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where a new acme account is created with a reference to an existing non-acme
account known by the acme provider. some acme providers require this.
This commit is contained in:
Mechiel Lukkien
2023-12-22 10:34:55 +01:00
parent db3fef4981
commit ee1094e1cb
5 changed files with 65 additions and 10 deletions
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17
config/config.go
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@ -116,15 +116,22 @@ type Dynamic struct {
}
type ACME struct {
DirectoryURL string `sconf-doc:"For letsencrypt, use https://acme-v02.api.letsencrypt.org/directory."`
RenewBefore time.Duration `sconf:"optional" sconf-doc:"How long before expiration to renew the certificate. Default is 30 days."`
ContactEmail string `sconf-doc:"Email address to register at ACME provider. The provider can email you when certificates are about to expire. If you configure an address for which email is delivered by this server, keep in mind that TLS misconfigurations could result in such notification emails not arriving."`
Port int `sconf:"optional" sconf-doc:"TLS port for ACME validation, 443 by default. You should only override this if you cannot listen on port 443 directly. ACME will make requests to port 443, so you'll have to add an external mechanism to get the connection here, e.g. by configuring port forwarding."`
IssuerDomainName string `sconf:"optional" sconf-doc:"If set, used for suggested CAA DNS records, for restricting TLS certificate issuance to a Certificate Authority. If empty and DirectyURL is for Let's Encrypt, this value is set automatically to letsencrypt.org."`
DirectoryURL string `sconf-doc:"For letsencrypt, use https://acme-v02.api.letsencrypt.org/directory."`
RenewBefore time.Duration `sconf:"optional" sconf-doc:"How long before expiration to renew the certificate. Default is 30 days."`
ContactEmail string `sconf-doc:"Email address to register at ACME provider. The provider can email you when certificates are about to expire. If you configure an address for which email is delivered by this server, keep in mind that TLS misconfigurations could result in such notification emails not arriving."`
Port int `sconf:"optional" sconf-doc:"TLS port for ACME validation, 443 by default. You should only override this if you cannot listen on port 443 directly. ACME will make requests to port 443, so you'll have to add an external mechanism to get the connection here, e.g. by configuring port forwarding."`
IssuerDomainName string `sconf:"optional" sconf-doc:"If set, used for suggested CAA DNS records, for restricting TLS certificate issuance to a Certificate Authority. If empty and DirectyURL is for Let's Encrypt, this value is set automatically to letsencrypt.org."`
ExternalAccountBinding *ExternalAccountBinding `sconf:"optional" sconf-doc:"ACME providers can require that a request for a new ACME account reference an existing non-ACME account known to the provider. External account binding references that account by a key id, and authorizes new ACME account requests by signing it with a key known both by the ACME client and ACME provider."`
// ../rfc/8555:2111
Manager *autotls.Manager `sconf:"-" json:"-"`
}
type ExternalAccountBinding struct {
KeyID string `sconf-doc:"Key identifier, from ACME provider."`
KeyFile string `sconf-doc:"File containing the base64url-encoded key used to sign account requests with external account binding. The ACME provider will verify the account request is correctly signed by the key. File is evaluated relative to the directory of mox.conf."`
}
type Listener struct {
IPs []string `sconf-doc:"Use 0.0.0.0 to listen on all IPv4 and/or :: to listen on all IPv6 addresses, but it is better to explicitly specify the IPs you want to use for email, as mox will make sure outgoing connections will only be made from one of those IPs."`
NATIPs []string `sconf:"optional" sconf-doc:"If set, the mail server is configured behind a NAT and field IPs are internal instead of the public IPs, while NATIPs lists the public IPs. Used during IP-related DNS self-checks, such as for iprev, mx, spf, autoconfig, autodiscover, and for autotls."`