diff options
Diffstat (limited to 'modules/caddyhttp/autohttps.go')
| -rw-r--r-- | modules/caddyhttp/autohttps.go | 214 |
1 files changed, 145 insertions, 69 deletions
diff --git a/modules/caddyhttp/autohttps.go b/modules/caddyhttp/autohttps.go index 1239abb..d8e5c26 100644 --- a/modules/caddyhttp/autohttps.go +++ b/modules/caddyhttp/autohttps.go @@ -407,98 +407,129 @@ redirServersLoop: // base for the new ones (this is important for preserving behavior the // user intends to be "defaults"). func (app *App) createAutomationPolicies(ctx caddy.Context, publicNames, internalNames []string) error { - // nothing to do if no names to manage certs for - if len(publicNames) == 0 && len(internalNames) == 0 { - return nil - } - - // start by finding a base policy that the user may have defined - // which should, in theory, apply to any policies derived from it; - // typically this would be a "catch-all" policy with no host filter + // before we begin, loop through the existing automation policies + // and, for any ACMEIssuers we find, make sure they're filled in + // with default values that might be specified in our HTTP app; also + // look for a base (or "catch-all" / default) automation policy, + // which we're going to essentially require, to make sure it has + // those defaults, too var basePolicy *caddytls.AutomationPolicy - if app.tlsApp.Automation != nil { - for _, ap := range app.tlsApp.Automation.Policies { - // if an existing policy matches (specifically, a catch-all policy), - // we should inherit from it, because that is what the user expects; - // this is very common for user setting a default issuer, with a - // custom CA endpoint, for example - whichever one we choose must - // have a host list that is a superset of the policy we make... - // the policy with no host filter is guaranteed to qualify - if len(ap.Subjects) == 0 { - basePolicy = ap - break + var foundBasePolicy bool + if app.tlsApp.Automation == nil { + // we will expect this to not be nil from now on + app.tlsApp.Automation = new(caddytls.AutomationConfig) + } + for _, ap := range app.tlsApp.Automation.Policies { + // set up default issuer -- honestly, this is only + // really necessary because the HTTP app is opinionated + // and has settings which could be inferred as new + // defaults for the ACMEIssuer in the TLS app + if ap.Issuer == nil { + ap.Issuer = new(caddytls.ACMEIssuer) + } + if acmeIssuer, ok := ap.Issuer.(*caddytls.ACMEIssuer); ok { + err := app.fillInACMEIssuer(acmeIssuer) + if err != nil { + return err } } + + // while we're here, is this the catch-all/base policy? + if !foundBasePolicy && len(ap.Subjects) == 0 { + basePolicy = ap + foundBasePolicy = true + } } + if basePolicy == nil { + // no base policy found, we will make one! basePolicy = new(caddytls.AutomationPolicy) } - // addPolicy adds an automation policy that uses issuer for hosts. - addPolicy := func(issuer certmagic.Issuer, hosts []string) error { - // shallow-copy the matching policy; we want to inherit - // from it, not replace it... this takes two lines to - // overrule compiler optimizations - policyCopy := *basePolicy - newPolicy := &policyCopy + // if the basePolicy has an existing ACMEIssuer, let's + // use it, otherwise we'll make one + baseACMEIssuer, _ := basePolicy.Issuer.(*caddytls.ACMEIssuer) + if baseACMEIssuer == nil { + // note that this happens if basePolicy.Issuer is nil + // OR if it is not nil but is not an ACMEIssuer + baseACMEIssuer = new(caddytls.ACMEIssuer) + } - // very important to provision it, since we are - // bypassing the JSON-unmarshaling step - if prov, ok := issuer.(caddy.Provisioner); ok { - err := prov.Provision(ctx) - if err != nil { - return err - } + // if there was a base policy to begin with, we already + // filled in its issuer's defaults; if there wasn't, we + // stil need to do that + if !foundBasePolicy { + err := app.fillInACMEIssuer(baseACMEIssuer) + if err != nil { + return err } - newPolicy.Issuer = issuer - newPolicy.Subjects = hosts + } - return app.tlsApp.AddAutomationPolicy(newPolicy) + // never overwrite any other issuer that might already be configured + if basePolicy.Issuer == nil { + basePolicy.Issuer = baseACMEIssuer } - if len(publicNames) > 0 { - var acmeIssuer *caddytls.ACMEIssuer - // if it has an ACME issuer, maybe we can just use that - // TODO: we might need a deep copy here, like a Clone() method on ACMEIssuer... - acmeIssuer, _ = basePolicy.Issuer.(*caddytls.ACMEIssuer) - if acmeIssuer == nil { - acmeIssuer = new(caddytls.ACMEIssuer) - } - if app.HTTPPort > 0 || app.HTTPSPort > 0 { - if acmeIssuer.Challenges == nil { - acmeIssuer.Challenges = new(caddytls.ChallengesConfig) - } - } - if app.HTTPPort > 0 { - if acmeIssuer.Challenges.HTTP == nil { - acmeIssuer.Challenges.HTTP = new(caddytls.HTTPChallengeConfig) - } - // don't overwrite existing explicit config - if acmeIssuer.Challenges.HTTP.AlternatePort == 0 { - acmeIssuer.Challenges.HTTP.AlternatePort = app.HTTPPort - } - } - if app.HTTPSPort > 0 { - if acmeIssuer.Challenges.TLSALPN == nil { - acmeIssuer.Challenges.TLSALPN = new(caddytls.TLSALPNChallengeConfig) - } - // don't overwrite existing explicit config - if acmeIssuer.Challenges.TLSALPN.AlternatePort == 0 { - acmeIssuer.Challenges.TLSALPN.AlternatePort = app.HTTPSPort - } - } - if err := addPolicy(acmeIssuer, publicNames); err != nil { + if !foundBasePolicy { + // there was no base policy to begin with, so add + // our base/catch-all policy - this will serve the + // public-looking names as well as any other names + // that don't match any other policy + app.tlsApp.AddAutomationPolicy(basePolicy) + } else { + // a base policy already existed; we might have + // changed it, so re-provision it + err := basePolicy.Provision(app.tlsApp) + if err != nil { return err } } + // public names will be taken care of by the base (catch-all) + // policy, which we've ensured exists if not already specified; + // internal names, however, need to be handled by an internal + // issuer, which we need to make a new policy for, scoped to + // just those names (yes, this logic is a bit asymmetric, but + // it works, because our assumed/natural default issuer is an + // ACME issuer) if len(internalNames) > 0 { internalIssuer := new(caddytls.InternalIssuer) - if err := addPolicy(internalIssuer, internalNames); err != nil { + + // shallow-copy the base policy; we want to inherit + // from it, not replace it... this takes two lines to + // overrule compiler optimizations + policyCopy := *basePolicy + newPolicy := &policyCopy + + // very important to provision the issuer, since we + // are bypassing the JSON-unmarshaling step + if err := internalIssuer.Provision(ctx); err != nil { + return err + } + + // this policy should apply only to the given names + // and should use our issuer -- yes, this overrides + // any issuer that may have been set in the base + // policy, but we do this because these names do not + // already have a policy associated with them, which + // is easy to do; consider the case of a Caddyfile + // that has only "localhost" as a name, but sets the + // default/global ACME CA to the Let's Encrypt staging + // endpoint... they probably don't intend to change the + // fundamental set of names that setting applies to, + // rather they just want to change the CA for the set + // of names that would normally use the production API; + // anyway, that gets into the weeds a bit... + newPolicy.Subjects = internalNames + newPolicy.Issuer = internalIssuer + + err := app.tlsApp.AddAutomationPolicy(newPolicy) + if err != nil { return err } } + // we just changed a lot of stuff, so double-check that it's all good err := app.tlsApp.Validate() if err != nil { return err @@ -507,6 +538,51 @@ func (app *App) createAutomationPolicies(ctx caddy.Context, publicNames, interna return nil } +// fillInACMEIssuer fills in default values into acmeIssuer that +// are defined in app; these values at time of writing are just +// app.HTTPPort and app.HTTPSPort, which are used by ACMEIssuer. +// Sure, we could just use the global/CertMagic defaults, but if +// a user has configured those ports in the HTTP app, it makes +// sense to use them in the TLS app too, even if they forgot (or +// were too lazy, like me) to set it in each automation policy +// that uses it -- this just makes things a little less tedious +// for the user, so they don't have to repeat those ports in +// potentially many places. This function never steps on existing +// config values. If any changes are made, acmeIssuer is +// reprovisioned. acmeIssuer must not be nil. +func (app *App) fillInACMEIssuer(acmeIssuer *caddytls.ACMEIssuer) error { + var anyChanges bool + if app.HTTPPort > 0 || app.HTTPSPort > 0 { + if acmeIssuer.Challenges == nil { + acmeIssuer.Challenges = new(caddytls.ChallengesConfig) + } + } + if app.HTTPPort > 0 { + if acmeIssuer.Challenges.HTTP == nil { + acmeIssuer.Challenges.HTTP = new(caddytls.HTTPChallengeConfig) + } + // don't overwrite existing explicit config + if acmeIssuer.Challenges.HTTP.AlternatePort == 0 { + acmeIssuer.Challenges.HTTP.AlternatePort = app.HTTPPort + anyChanges = true + } + } + if app.HTTPSPort > 0 { + if acmeIssuer.Challenges.TLSALPN == nil { + acmeIssuer.Challenges.TLSALPN = new(caddytls.TLSALPNChallengeConfig) + } + // don't overwrite existing explicit config + if acmeIssuer.Challenges.TLSALPN.AlternatePort == 0 { + acmeIssuer.Challenges.TLSALPN.AlternatePort = app.HTTPSPort + anyChanges = true + } + } + if anyChanges { + return acmeIssuer.Provision(app.ctx) + } + return nil +} + // automaticHTTPSPhase2 begins certificate management for // all names in the qualifying domain set for each server. // This phase must occur after provisioning and at the end |