11package azureidentity
22
33import (
4- "context"
54"crypto/x509"
65"encoding/base64"
76"encoding/json"
8- "io"
9- "net/http"
7+ "encoding/pem"
108"regexp"
119
1210"go.mozilla.org/pkcs7"
@@ -23,7 +21,7 @@ type metadata struct {
2321
2422// Validate ensures the signature was signed by an Azure certificate.
2523// It returns the associated VM ID if successful.
26- func Validate (ctx context. Context , signature string ,options x509.VerifyOptions ) (string ,error ) {
24+ func Validate (signature string ,options x509.VerifyOptions ) (string ,error ) {
2725data ,err := base64 .StdEncoding .DecodeString (signature )
2826if err != nil {
2927return "" ,xerrors .Errorf ("decode base64: %w" ,err )
@@ -41,24 +39,14 @@ func Validate(ctx context.Context, signature string, options x509.VerifyOptions)
4139}
4240if options .Intermediates == nil {
4341options .Intermediates = x509 .NewCertPool ()
44- for _ ,certURL := range signer .IssuingCertificateURL {
45- req ,err := http .NewRequestWithContext (ctx ,"GET" ,certURL ,nil )
46- if err != nil {
47- return "" ,xerrors .Errorf ("new request %q: %w" ,certURL ,err )
48- }
49- res ,err := http .DefaultClient .Do (req )
50- if err != nil {
51- return "" ,xerrors .Errorf ("perform request %q: %w" ,certURL ,err )
42+ for _ ,cert := range certificates {
43+ block ,rest := pem .Decode ([]byte (cert ))
44+ if len (rest )!= 0 {
45+ return "" ,xerrors .Errorf ("invalid certificate. %d bytes remain" ,len (rest ))
5246}
53- data ,err := io . ReadAll ( res . Body )
47+ cert ,err := x509 . ParseCertificate ( block . Bytes )
5448if err != nil {
55- _ = res .Body .Close ()
56- return "" ,xerrors .Errorf ("read body %q: %w" ,certURL ,err )
57- }
58- _ = res .Body .Close ()
59- cert ,err := x509 .ParseCertificate (data )
60- if err != nil {
61- return "" ,xerrors .Errorf ("parse certificate %q: %w" ,certURL ,err )
49+ return "" ,xerrors .Errorf ("parse certificate: %w" ,err )
6250}
6351options .Intermediates .AddCert (cert )
6452}
@@ -76,3 +64,68 @@ func Validate(ctx context.Context, signature string, options x509.VerifyOptions)
7664}
7765return metadata .VMID ,nil
7866}
67+
68+ var certificates = []string {
69+ `-----BEGIN CERTIFICATE-----
70+ MIIFWjCCBEKgAwIBAgIQDxSWXyAgaZlP1ceseIlB4jANBgkqhkiG9w0BAQsFADBa
71+ MQswCQYDVQQGEwJJRTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJl
72+ clRydXN0MSIwIAYDVQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTIw
73+ MDcyMTIzMDAwMFoXDTI0MTAwODA3MDAwMFowTzELMAkGA1UEBhMCVVMxHjAcBgNV
74+ BAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEgMB4GA1UEAxMXTWljcm9zb2Z0IFJT
75+ QSBUTFMgQ0EgMDEwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQCqYnfP
76+ mmOyBoTzkDb0mfMUUavqlQo7Rgb9EUEf/lsGWMk4bgj8T0RIzTqk970eouKVuL5R
77+ IMW/snBjXXgMQ8ApzWRJCZbar879BV8rKpHoAW4uGJssnNABf2n17j9TiFy6BWy+
78+ IhVnFILyLNK+W2M3zK9gheiWa2uACKhuvgCca5Vw/OQYErEdG7LBEzFnMzTmJcli
79+ W1iCdXby/vI/OxbfqkKD4zJtm45DJvC9Dh+hpzqvLMiK5uo/+aXSJY+SqhoIEpz+
80+ rErHw+uAlKuHFtEjSeeku8eR3+Z5ND9BSqc6JtLqb0bjOHPm5dSRrgt4nnil75bj
81+ c9j3lWXpBb9PXP9Sp/nPCK+nTQmZwHGjUnqlO9ebAVQD47ZisFonnDAmjrZNVqEX
82+ F3p7laEHrFMxttYuD81BdOzxAbL9Rb/8MeFGQjE2Qx65qgVfhH+RsYuuD9dUw/3w
83+ ZAhq05yO6nk07AM9c+AbNtRoEcdZcLCHfMDcbkXKNs5DJncCqXAN6LhXVERCw/us
84+ G2MmCMLSIx9/kwt8bwhUmitOXc6fpT7SmFvRAtvxg84wUkg4Y/Gx++0j0z6StSeN
85+ 0EJz150jaHG6WV4HUqaWTb98Tm90IgXAU4AW2GBOlzFPiU5IY9jt+eXC2Q6yC/Zp
86+ TL1LAcnL3Qa/OgLrHN0wiw1KFGD51WRPQ0Sh7QIDAQABo4IBJTCCASEwHQYDVR0O
87+ BBYEFLV2DDARzseSQk1Mx1wsyKkM6AtkMB8GA1UdIwQYMBaAFOWdWTCCR1jMrPoI
88+ VDaGezq1BE3wMA4GA1UdDwEB/wQEAwIBhjAdBgNVHSUEFjAUBggrBgEFBQcDAQYI
89+ KwYBBQUHAwIwEgYDVR0TAQH/BAgwBgEB/wIBADA0BggrBgEFBQcBAQQoMCYwJAYI
90+ KwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTA6BgNVHR8EMzAxMC+g
91+ LaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vT21uaXJvb3QyMDI1LmNybDAq
92+ BgNVHSAEIzAhMAgGBmeBDAECATAIBgZngQwBAgIwCwYJKwYBBAGCNyoBMA0GCSqG
93+ SIb3DQEBCwUAA4IBAQCfK76SZ1vae4qt6P+dTQUO7bYNFUHR5hXcA2D59CJWnEj5
94+ na7aKzyowKvQupW4yMH9fGNxtsh6iJswRqOOfZYC4/giBO/gNsBvwr8uDW7t1nYo
95+ DYGHPpvnpxCM2mYfQFHq576/TmeYu1RZY29C4w8xYBlkAA8mDJfRhMCmehk7cN5F
96+ JtyWRj2cZj/hOoI45TYDBChXpOlLZKIYiG1giY16vhCRi6zmPzEwv+tk156N6cGS
97+ Vm44jTQ/rs1sa0JSYjzUaYngoFdZC4OfxnIkQvUIA4TOFmPzNPEFdjcZsgbeEz4T
98+ cGHTBPK4R28F44qIMCtHRV55VMX53ev6P3hRddJb
99+ -----END CERTIFICATE-----` ,
100+ `-----BEGIN CERTIFICATE-----
101+ MIIFWjCCBEKgAwIBAgIQD6dHIsU9iMgPWJ77H51KOjANBgkqhkiG9w0BAQsFADBa
102+ MQswCQYDVQQGEwJJRTESMBAGA1UEChMJQmFsdGltb3JlMRMwEQYDVQQLEwpDeWJl
103+ clRydXN0MSIwIAYDVQQDExlCYWx0aW1vcmUgQ3liZXJUcnVzdCBSb290MB4XDTIw
104+ MDcyMTIzMDAwMFoXDTI0MTAwODA3MDAwMFowTzELMAkGA1UEBhMCVVMxHjAcBgNV
105+ BAoTFU1pY3Jvc29mdCBDb3Jwb3JhdGlvbjEgMB4GA1UEAxMXTWljcm9zb2Z0IFJT
106+ QSBUTFMgQ0EgMDIwggIiMA0GCSqGSIb3DQEBAQUAA4ICDwAwggIKAoICAQD0wBlZ
107+ qiokfAYhMdHuEvWBapTj9tFKL+NdsS4pFDi8zJVdKQfR+F039CDXtD9YOnqS7o88
108+ +isKcgOeQNTri472mPnn8N3vPCX0bDOEVk+nkZNIBA3zApvGGg/40Thv78kAlxib
109+ MipsKahdbuoHByOB4ZlYotcBhf/ObUf65kCRfXMRQqOKWkZLkilPPn3zkYM5GHxe
110+ I4MNZ1SoKBEoHa2E/uDwBQVxadY4SRZWFxMd7ARyI4Cz1ik4N2Z6ALD3MfjAgEED
111+ woknyw9TGvr4PubAZdqU511zNLBoavar2OAVTl0Tddj+RAhbnX1/zypqk+ifv+d3
112+ CgiDa8Mbvo1u2Q8nuUBrKVUmR6EjkV/dDrIsUaU643v/Wp/uE7xLDdhC5rplK9si
113+ NlYohMTMKLAkjxVeWBWbQj7REickISpc+yowi3yUrO5lCgNAKrCNYw+wAfAvhFkO
114+ eqPm6kP41IHVXVtGNC/UogcdiKUiR/N59IfYB+o2v54GMW+ubSC3BohLFbho/oZZ
115+ 5XyulIZK75pwTHmauCIeE5clU9ivpLwPTx9b0Vno9+ApElrFgdY0/YKZ46GfjOC9
116+ ta4G25VJ1WKsMmWLtzyrfgwbYopquZd724fFdpvsxfIvMG5m3VFkThOqzsOttDcU
117+ fyMTqM2pan4txG58uxNJ0MjR03UCEULRU+qMnwIDAQABo4IBJTCCASEwHQYDVR0O
118+ BBYEFP8vf+EG9DjzLe0ljZjC/g72bPz6MB8GA1UdIwQYMBaAFOWdWTCCR1jMrPoI
119+ VDaGezq1BE3wMA4GA1UdDwEB/wQEAwIBhjAdBgNVHSUEFjAUBggrBgEFBQcDAQYI
120+ KwYBBQUHAwIwEgYDVR0TAQH/BAgwBgEB/wIBADA0BggrBgEFBQcBAQQoMCYwJAYI
121+ KwYBBQUHMAGGGGh0dHA6Ly9vY3NwLmRpZ2ljZXJ0LmNvbTA6BgNVHR8EMzAxMC+g
122+ LaArhilodHRwOi8vY3JsMy5kaWdpY2VydC5jb20vT21uaXJvb3QyMDI1LmNybDAq
123+ BgNVHSAEIzAhMAgGBmeBDAECATAIBgZngQwBAgIwCwYJKwYBBAGCNyoBMA0GCSqG
124+ SIb3DQEBCwUAA4IBAQCg2d165dQ1tHS0IN83uOi4S5heLhsx+zXIOwtxnvwCWdOJ
125+ 3wFLQaFDcgaMtN79UjMIFVIUedDZBsvalKnx+6l2tM/VH4YAyNPx+u1LFR0joPYp
126+ QYLbNYkedkNuhRmEBesPqj4aDz68ZDI6fJ92sj2q18QvJUJ5Qz728AvtFOat+Ajg
127+ K0PFqPYEAviUKr162NB1XZJxf6uyIjUlnG4UEdHfUqdhl0R84mMtrYINksTzQ2sH
128+ YM8fEhqICtTlcRLr/FErUaPUe9648nziSnA0qKH7rUZqP/Ifmbo+WNZSZG1BbgOh
129+ lk+521W+Ncih3HRbvRBE0LWYT8vWKnfjgZKxwHwJ
130+ -----END CERTIFICATE-----` ,
131+ }