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ACR Login: Use Azure SDK library to get the credential and token #3398

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615673b
ACR Login: Use Azure SDK library to get the credential and token
dbalseiro Jan 26, 2026
9aa595b
Add Azure SDK and implement ACR Login
dbalseiro Feb 3, 2026
8ebe95c
run update-codegen
dbalseiro Feb 10, 2026
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7 changes: 7 additions & 0 deletions go.mod
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,8 @@ replace knative.dev/pkg => knative.dev/pkg v0.0.0-20250716115900-19d3cc2da0b9

require (
github.com/AlecAivazis/survey/v2 v2.3.7
github.com/Azure/azure-sdk-for-go/sdk/azcore v1.20.0
github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.13.1
github.com/BurntSushi/toml v1.5.0
github.com/Masterminds/semver v1.5.0
github.com/Microsoft/go-winio v0.6.2
Expand Down Expand Up @@ -83,6 +85,7 @@ require (
contrib.go.opencensus.io/exporter/prometheus v0.4.2 // indirect
dario.cat/mergo v1.0.2 // indirect
github.com/Azure/azure-sdk-for-go v68.0.0+incompatible // indirect
github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2 // indirect
github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c // indirect
github.com/Azure/go-autorest v14.2.0+incompatible // indirect
github.com/Azure/go-autorest/autorest v0.11.30 // indirect
Expand All @@ -92,6 +95,7 @@ require (
github.com/Azure/go-autorest/autorest/date v0.3.1 // indirect
github.com/Azure/go-autorest/logger v0.2.2 // indirect
github.com/Azure/go-autorest/tracing v0.6.1 // indirect
github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0 // indirect
github.com/GoogleContainerTools/kaniko v1.24.0 // indirect
github.com/Masterminds/semver/v3 v3.2.1 // indirect
github.com/Microsoft/hcsshim v0.13.0 // indirect
Expand Down Expand Up @@ -167,6 +171,7 @@ require (
github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
github.com/gogo/protobuf v1.3.2 // indirect
github.com/golang-jwt/jwt/v4 v4.5.2 // indirect
github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
github.com/golang/protobuf v1.5.4 // indirect
github.com/google/btree v1.1.3 // indirect
Expand Down Expand Up @@ -199,6 +204,7 @@ require (
github.com/kevinburke/ssh_config v1.2.0 // indirect
github.com/klauspost/compress v1.18.0 // indirect
github.com/klauspost/pgzip v1.2.6 // indirect
github.com/kylelemons/godebug v1.1.0 // indirect
github.com/liggitt/tabwriter v0.0.0-20181228230101-89fcab3d43de // indirect
github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
github.com/magiconair/properties v1.8.7 // indirect
Expand Down Expand Up @@ -239,6 +245,7 @@ require (
github.com/pelletier/go-toml/v2 v2.2.4 // indirect
github.com/peterbourgon/diskv v2.0.1+incompatible // indirect
github.com/pjbgf/sha1cd v0.3.2 // indirect
github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c // indirect
github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
github.com/prometheus/client_golang v1.23.2 // indirect
Expand Down
18 changes: 18 additions & 0 deletions go.sum
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,14 @@ github.com/AlecAivazis/survey/v2 v2.3.7 h1:6I/u8FvytdGsgonrYsVn2t8t4QiRnh6QSTqkk
github.com/AlecAivazis/survey/v2 v2.3.7/go.mod h1:xUTIdE4KCOIjsBAE1JYsUPoCqYdZ1reCfTwbto0Fduo=
github.com/Azure/azure-sdk-for-go v68.0.0+incompatible h1:fcYLmCpyNYRnvJbPerq7U0hS+6+I79yEDJBqVNcqUzU=
github.com/Azure/azure-sdk-for-go v68.0.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
github.com/Azure/azure-sdk-for-go/sdk/azcore v1.20.0 h1:JXg2dwJUmPB9JmtVmdEB16APJ7jurfbY5jnfXpJoRMc=
github.com/Azure/azure-sdk-for-go/sdk/azcore v1.20.0/go.mod h1:YD5h/ldMsG0XiIw7PdyNhLxaM317eFh5yNLccNfGdyw=
github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.13.1 h1:Hk5QBxZQC1jb2Fwj6mpzme37xbCDdNTxU7O9eb5+LB4=
github.com/Azure/azure-sdk-for-go/sdk/azidentity v1.13.1/go.mod h1:IYus9qsFobWIc2YVwe/WPjcnyCkPKtnHAqUYeebc8z0=
github.com/Azure/azure-sdk-for-go/sdk/azidentity/cache v0.3.2 h1:yz1bePFlP5Vws5+8ez6T3HWXPmwOK7Yvq8QxDBD3SKY=
github.com/Azure/azure-sdk-for-go/sdk/azidentity/cache v0.3.2/go.mod h1:Pa9ZNPuoNu/GztvBSKk9J1cDJW6vk/n0zLtV4mgd8N8=
github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2 h1:9iefClla7iYpfYWdzPCRDozdmndjTm8DXdpCzPajMgA=
github.com/Azure/azure-sdk-for-go/sdk/internal v1.11.2/go.mod h1:XtLgD3ZD34DAaVIIAyG3objl5DynM3CQ/vMcbBNJZGI=
github.com/Azure/go-ansiterm v0.0.0-20210617225240-d185dfc1b5a1/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c h1:udKWzYgxTojEKWjV8V+WSxDXJ4NFATAsZjh8iIbsQIg=
github.com/Azure/go-ansiterm v0.0.0-20250102033503-faa5f7b0171c/go.mod h1:xomTg63KZ2rFqZQzSB4Vz2SUXa1BpHTVz9L5PTmPC4E=
Expand Down Expand Up @@ -96,6 +104,10 @@ github.com/Azure/go-autorest/logger v0.2.2/go.mod h1:I5fg9K52o+iuydlWfa9T5K6WFos
github.com/Azure/go-autorest/tracing v0.6.0/go.mod h1:+vhtPC754Xsa23ID7GlGsrdKBpUA79WCAKPPZVC2DeU=
github.com/Azure/go-autorest/tracing v0.6.1 h1:YUMSrC/CeD1ZnnXcNYU4a/fzsO35u2Fsful9L/2nyR0=
github.com/Azure/go-autorest/tracing v0.6.1/go.mod h1:/3EgjbsjraOqiicERAeu3m7/z0x1TzjQGAwDrJrXGkc=
github.com/AzureAD/microsoft-authentication-extensions-for-go/cache v0.1.1 h1:WJTmL004Abzc5wDB5VtZG2PJk5ndYDgVacGqfirKxjM=
github.com/AzureAD/microsoft-authentication-extensions-for-go/cache v0.1.1/go.mod h1:tCcJZ0uHAmvjsVYzEFivsRTN00oz5BEsRgQHu5JZ9WE=
github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0 h1:XRzhVemXdgvJqCH0sFfrBUTnUJSBrBf7++ypk+twtRs=
github.com/AzureAD/microsoft-authentication-library-for-go v1.6.0/go.mod h1:HKpQxkWaGLJ+D/5H8QRpyQXA1eKjxkFlOMwck5+33Jk=
github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
Expand Down Expand Up @@ -464,6 +476,8 @@ github.com/golang-jwt/jwt/v4 v4.4.2/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w
github.com/golang-jwt/jwt/v4 v4.5.0/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
github.com/golang-jwt/jwt/v4 v4.5.2 h1:YtQM7lnr8iZ+j5q71MGKkNw9Mn7AjHM68uc9g5fXeUI=
github.com/golang-jwt/jwt/v4 v4.5.2/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
github.com/golang-jwt/jwt/v5 v5.3.0 h1:pv4AsKCKKZuqlgs5sUmn4x8UlGa0kEVt/puTpKx9vvo=
github.com/golang-jwt/jwt/v5 v5.3.0/go.mod h1:fxCRLWMO43lRc8nhHWY6LGqRcf+1gQWArsqaEUEa5bE=
github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
github.com/golang/glog v1.0.0/go.mod h1:EWib/APOK0SL3dFbYqvxE3UYd8E6s1ouQ7iEp/0LWV4=
github.com/golang/groupcache v0.0.0-20190129154638-5b532d6fd5ef/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
Expand Down Expand Up @@ -682,6 +696,8 @@ github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dv
github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4gf13a4=
github.com/kevinburke/ssh_config v1.2.0/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
github.com/keybase/go-keychain v0.0.1 h1:way+bWYa6lDppZoZcgMbYsvC7GxljxrskdNInRtuthU=
github.com/keybase/go-keychain v0.0.1/go.mod h1:PdEILRW3i9D8JcdM+FmY6RwkHGnhHxXwkPPMeUgOK1k=
github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
github.com/kisielk/errcheck v1.2.0/go.mod h1:/BMXB+zMLi60iA8Vv6Ksmxu/1UDYcXs4uQLJ+jE2L00=
github.com/kisielk/errcheck v1.5.0/go.mod h1:pFxgyoBC7bSaBwPgfKdkLd5X25qrDl4LWUI2bnpBCr8=
Expand Down Expand Up @@ -888,6 +904,8 @@ github.com/peterbourgon/diskv v2.0.1+incompatible h1:UBdAOUP5p4RWqPBg048CAvpKN+v
github.com/peterbourgon/diskv v2.0.1+incompatible/go.mod h1:uqqh8zWWbv1HBMNONnaR/tNboyR3/BZd58JJSHlUSCU=
github.com/pjbgf/sha1cd v0.3.2 h1:a9wb0bp1oC2TGwStyn0Umc/IGKQnEgF0vVaZ8QF8eo4=
github.com/pjbgf/sha1cd v0.3.2/go.mod h1:zQWigSxVmsHEZow5qaLtPYxpcKMMQpa09ixqBxuCS6A=
github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c h1:+mdjkGKdHQG3305AYmdv1U2eRNDiU2ErMBj1gwrq8eQ=
github.com/pkg/browser v0.0.0-20240102092130-5ac0b6a4141c/go.mod h1:7rwL4CYBLnjLxUqIJNnCWiEdr3bn6IUYi15bNlnbCCU=
github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
Expand Down
42 changes: 16 additions & 26 deletions pkg/k8s/keychains.go
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Original file line number Diff line number Diff line change
@@ -1,12 +1,12 @@
package k8s

import (
"encoding/json"
"context"
"fmt"
"os"
"path"
"strings"

"github.com/Azure/azure-sdk-for-go/sdk/azcore/policy"
"github.com/Azure/azure-sdk-for-go/sdk/azidentity"
"github.com/google/go-containerregistry/pkg/name"
"github.com/google/go-containerregistry/pkg/v1/google"

Expand Down Expand Up @@ -54,32 +54,22 @@ func GetACRCredentialLoader() []creds.CredentialsCallback {
if !strings.HasSuffix(registry, ".azurecr.io") {
return oci.Credentials{}, creds.ErrCredentialsNotFound
}

f, err := os.Open(path.Join(os.Getenv("HOME"), ".azure", "accessTokens.json"))
// Use Azure SDK to get access token
azCredentials, err := azidentity.NewDefaultAzureCredential(nil)
if err != nil {
return oci.Credentials{}, fmt.Errorf("open Azure access tokens: %w", err)
}
defer f.Close()

var tokens []struct {
AccessToken string `json:"accessToken"`
Resource string `json:"resource"`
}

if err := json.NewDecoder(f).Decode(&tokens); err != nil {
return oci.Credentials{}, fmt.Errorf("decode Azure access tokens: %w", err)
return oci.Credentials{}, fmt.Errorf("failed to create default azure credentials: %w", err)
}

target := "https://" + registry
for _, t := range tokens {
if t.Resource == target {
return oci.Credentials{
Username: "00000000-0000-0000-0000-000000000000",
Password: t.AccessToken,
}, nil
}
scope := "https://containerregistry.azure.net/.default"
token, err := azCredentials.GetToken(context.Background(), policy.TokenRequestOptions{
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@lkingland lkingland Feb 17, 2026

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We might want to plumb through a context object to GetACRCredentialLoader in case this thing can lock up or need canceling.

Scopes: []string{scope},
})
if err != nil {
return oci.Credentials{}, fmt.Errorf("failed to get azure access token: %w", err)
}
return oci.Credentials{}, creds.ErrCredentialsNotFound
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@lkingland lkingland Feb 17, 2026

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I notice that creds.ErrCredentialsNotFound is no longer returned. This sentinel value may be depended upon by other systems to fall-through (despite using error types as flow-control being an antipattern; it's life). It might be a good idea to double-check that there's no other code depending on exactly that error type to ensure we're not breaking any "error fallback" systems if one of the other generic errors is returned instead.

return oci.Credentials{
Username: "00000000-0000-0000-0000-000000000000",
Password: token.Token,
}, nil
},
}
}
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