Use the base64-encoded signature to verify the instance identity document
This topic explains how to verify the instance identity document using the base64-encoded signature and the AWS RSA public certificate.
To validate the instance identity document using the base64-encoded signature and the AWS RSA public certificate
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Connect to the instance.
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Retrieve the base64-encoded signature from the instance metadata, convert it to a byte array, and add it to variable named
$Signature. Use one of the following commands depending on the IMDS version used by the instance.- IMDSv2
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PS C:\>[string]$token = (Invoke-WebRequest -Method Put -Headers @{'X-aws-ec2-metadata-token-ttl-seconds' = '21600'} http://169.254.169.254/latest/api/token).ContentPS C:\>$Signature= [Convert]::FromBase64String((Invoke-WebRequest -Headers @{'X-aws-ec2-metadata-token' = $Token} http://169.254.169.254/latest/dynamic/instance-identity/signature).Content) - IMDSv1
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PS C:\>$Signature= [Convert]::FromBase64String((Invoke-WebRequest http://169.254.169.254/latest/dynamic/instance-identity/signature).Content)
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Retrieve the plaintext instance identity document from the instance metadata, convert it to a byte array, and add it to a variable named
$Document. Use one of the following commands depending on the IMDS version used by the instance.- IMDSv2
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PS C:\>$Document= [Text.Encoding]::UTF8.GetBytes((Invoke-WebRequest -Headers @{'X-aws-ec2-metadata-token' = $Token} http://169.254.169.254/latest/dynamic/instance-identity/document).Content) - IMDSv1
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PS C:\>$Document= [Text.Encoding]::UTF8.GetBytes((Invoke-WebRequest http://169.254.169.254/latest/dynamic/instance-identity/document).Content)
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Add one of the following AWS RSA public certificates to a new file named
certificate.pem, depending on the Region of your instance.- Other AWS Regions
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The following AWS public certificate is for all AWS Regions, except Hong Kong, Bahrain, Cape Town, Milan, Jakarta, China, and GovCloud.
-----BEGIN CERTIFICATE----- MIIDIjCCAougAwIBAgIJAKnL4UEDMN/FMA0GCSqGSIb3DQEBBQUAMGoxCzAJBgNV BAYTAlVTMRMwEQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdTZWF0dGxlMRgw FgYDVQQKEw9BbWF6b24uY29tIEluYy4xGjAYBgNVBAMTEWVjMi5hbWF6b25hd3Mu Y29tMB4XDTE0MDYwNTE0MjgwMloXDTI0MDYwNTE0MjgwMlowajELMAkGA1UEBhMC VVMxEzARBgNVBAgTCldhc2hpbmd0b24xEDAOBgNVBAcTB1NlYXR0bGUxGDAWBgNV BAoTD0FtYXpvbi5jb20gSW5jLjEaMBgGA1UEAxMRZWMyLmFtYXpvbmF3cy5jb20w gZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBAIe9GN//SRK2knbjySG0ho3yqQM3 e2TDhWO8D2e8+XZqck754gFSo99AbT2RmXClambI7xsYHZFapbELC4H91ycihvrD jbST1ZjkLQgga0NE1q43eS68ZeTDccScXQSNivSlzJZS8HJZjgqzBlXjZftjtdJL XeE4hwvo0sD4f3j9AgMBAAGjgc8wgcwwHQYDVR0OBBYEFCXWzAgVyrbwnFncFFIs 77VBdlE4MIGcBgNVHSMEgZQwgZGAFCXWzAgVyrbwnFncFFIs77VBdlE4oW6kbDBq MQswCQYDVQQGEwJVUzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHU2Vh dHRsZTEYMBYGA1UEChMPQW1hem9uLmNvbSBJbmMuMRowGAYDVQQDExFlYzIuYW1h em9uYXdzLmNvbYIJAKnL4UEDMN/FMAwGA1UdEwQFMAMBAf8wDQYJKoZIhvcNAQEF BQADgYEAFYcz1OgEhQBXIwIdsgCOS8vEtiJYF+j9uO6jz7VOmJqO+pRlAbRlvY8T C1haGgSI/A1uZUKs/Zfnph0oEI0/hu1IIJ/SKBDtN5lvmZ/IzbOPIJWirlsllQIQ 7zvWbGd9c9+Rm3p04oTvhup99la7kZqevJK0QRdD/6NpCKsqP/0= -----END CERTIFICATE----- - Hong Kong Region
The AWS public certificate for the Hong Kong Region is as follows.
-----BEGIN CERTIFICATE----- MIICSzCCAbQCCQDtQvkVxRvK9TANBgkqhkiG9w0BAQsFADBqMQswCQYDVQQGEwJV UzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHU2VhdHRsZTEYMBYGA1UE ChMPQW1hem9uLmNvbSBJbmMuMRowGAYDVQQDExFlYzIuYW1hem9uYXdzLmNvbTAe Fw0xOTAyMDMwMzAwMDZaFw0yOTAyMDIwMzAwMDZaMGoxCzAJBgNVBAYTAlVTMRMw EQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdTZWF0dGxlMRgwFgYDVQQKEw9B bWF6b24uY29tIEluYy4xGjAYBgNVBAMTEWVjMi5hbWF6b25hd3MuY29tMIGfMA0G CSqGSIb3DQEBAQUAA4GNADCBiQKBgQC1kkHXYTfc7gY5Q55JJhjTieHAgacaQkiR Pity9QPDE3b+NXDh4UdP1xdIw73JcIIG3sG9RhWiXVCHh6KkuCTqJfPUknIKk8vs M3RXflUpBe8Pf+P92pxqPMCz1Fr2NehS3JhhpkCZVGxxwLC5gaG0Lr4rFORubjYY Rh84dK98VwIDAQABMA0GCSqGSIb3DQEBCwUAA4GBAA6xV9f0HMqXjPHuGILDyaNN dKcvplNFwDTydVg32MNubAGnecoEBtUPtxBsLoVYXCOb+b5/ZMDubPF9tU/vSXuo TpYM5Bq57gJzDRaBOntQbX9bgHiUxw6XZWaTS/6xjRJDT5p3S1E0mPI3lP/eJv4o Ezk5zb3eIf10/sqt4756 -----END CERTIFICATE------ Bahrain Region
The AWS public certificate for the Bahrain Region is as follows.
-----BEGIN CERTIFICATE----- MIIDPDCCAqWgAwIBAgIJAMl6uIV/zqJFMA0GCSqGSIb3DQEBCwUAMHIxCzAJBgNV BAYTAlVTMRMwEQYDVQQIDApXYXNoaW5ndG9uMRAwDgYDVQQHDAdTZWF0dGxlMSAw HgYDVQQKDBdBbWF6b24gV2ViIFNlcnZpY2VzIExMQzEaMBgGA1UEAwwRZWMyLmFt YXpvbmF3cy5jb20wIBcNMTkwNDI2MTQzMjQ3WhgPMjE5ODA5MjkxNDMyNDdaMHIx CzAJBgNVBAYTAlVTMRMwEQYDVQQIDApXYXNoaW5ndG9uMRAwDgYDVQQHDAdTZWF0 dGxlMSAwHgYDVQQKDBdBbWF6b24gV2ViIFNlcnZpY2VzIExMQzEaMBgGA1UEAwwR ZWMyLmFtYXpvbmF3cy5jb20wgZ8wDQYJKoZIhvcNAQEBBQADgY0AMIGJAoGBALVN CDTZEnIeoX1SEYqq6k1BV0ZlpY5y3KnoOreCAE589TwS4MX5+8Fzd6AmACmugeBP Qk7Hm6b2+g/d4tWycyxLaQlcq81DB1GmXehRkZRgGeRge1ePWd1TUA0I8P/QBT7S gUePm/kANSFU+P7s7u1NNl+vynyi0wUUrw7/wIZTAgMBAAGjgdcwgdQwHQYDVR0O BBYEFILtMd+T4YgH1cgc+hVsVOV+480FMIGkBgNVHSMEgZwwgZmAFILtMd+T4YgH 1cgc+hVsVOV+480FoXakdDByMQswCQYDVQQGEwJVUzETMBEGA1UECAwKV2FzaGlu Z3RvbjEQMA4GA1UEBwwHU2VhdHRsZTEgMB4GA1UECgwXQW1hem9uIFdlYiBTZXJ2 aWNlcyBMTEMxGjAYBgNVBAMMEWVjMi5hbWF6b25hd3MuY29tggkAyXq4hX/OokUw DAYDVR0TBAUwAwEB/zANBgkqhkiG9w0BAQsFAAOBgQBhkNTBIFgWFd+ZhC/LhRUY 4OjEiykmbEp6hlzQ79T0Tfbn5A4NYDI2icBP0+hmf6qSnIhwJF6typyd1yPK5Fqt NTpxxcXmUKquX+pHmIkK1LKDO8rNE84jqxrxRsfDi6by82fjVYf2pgjJW8R1FAw+ mL5WQRFexbfB5aXhcMo0AA== -----END CERTIFICATE------ Cape Town Region
The AWS public certificate for the Cape Town Region is as follows.
-----BEGIN CERTIFICATE----- MIICNjCCAZ+gAwIBAgIJAKumfZiRrNvHMA0GCSqGSIb3DQEBCwUAMFwxCzAJBgNV BAYTAlVTMRkwFwYDVQQIExBXYXNoaW5ndG9uIFN0YXRlMRAwDgYDVQQHEwdTZWF0 dGxlMSAwHgYDVQQKExdBbWF6b24gV2ViIFNlcnZpY2VzIExMQzAgFw0xOTExMjcw NzE0MDVaGA8yMTk5MDUwMjA3MTQwNVowXDELMAkGA1UEBhMCVVMxGTAXBgNVBAgT EFdhc2hpbmd0b24gU3RhdGUxEDAOBgNVBAcTB1NlYXR0bGUxIDAeBgNVBAoTF0Ft YXpvbiBXZWIgU2VydmljZXMgTExDMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB gQDFd571nUzVtke3rPyRkYfvs3jh0C0EMzzG72boyUNjnfw1+m0TeFraTLKb9T6F 7TuB/ZEN+vmlYqr2+5Va8U8qLbPF0bRH+FdaKjhgWZdYXxGzQzU3ioy5W5ZM1VyB 7iUsxEAlxsybC3ziPYaHI42UiTkQNahmoroNeqVyHNnBpQIDAQABMA0GCSqGSIb3 DQEBCwUAA4GBAAJLylWyElEgOpW4B1XPyRVD4pAds8Guw2+krgqkY0HxLCdjosuH RytGDGN+q75aAoXzW5a7SGpxLxk6Hfv0xp3RjDHsoeP0i1d8MD3hAC5ezxS4oukK s5gbPOnokhKTMPXbTdRn5ZifCbWlx+bYN/mTYKvxho7b5SVg2o1La9aK -----END CERTIFICATE------ Milan Region
The AWS public certificate for the Milan Region is as follows.
-----BEGIN CERTIFICATE----- MIICNjCCAZ+gAwIBAgIJAOZ3GEIaDcugMA0GCSqGSIb3DQEBCwUAMFwxCzAJBgNV BAYTAlVTMRkwFwYDVQQIExBXYXNoaW5ndG9uIFN0YXRlMRAwDgYDVQQHEwdTZWF0 dGxlMSAwHgYDVQQKExdBbWF6b24gV2ViIFNlcnZpY2VzIExMQzAgFw0xOTEwMjQx NTE5MDlaGA8yMTk5MDMyOTE1MTkwOVowXDELMAkGA1UEBhMCVVMxGTAXBgNVBAgT EFdhc2hpbmd0b24gU3RhdGUxEDAOBgNVBAcTB1NlYXR0bGUxIDAeBgNVBAoTF0Ft YXpvbiBXZWIgU2VydmljZXMgTExDMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKB gQCjiPgW3vsXRj4JoA16WQDyoPc/eh3QBARaApJEc4nPIGoUolpAXcjFhWplo2O+ ivgfCsc4AU9OpYdAPha3spLey/bhHPRi1JZHRNqScKP0hzsCNmKhfnZTIEQCFvsp DRp4zr91/WS06/flJFBYJ6JHhp0KwM81XQG59lV6kkoW7QIDAQABMA0GCSqGSIb3 DQEBCwUAA4GBAGLLrY3P+HH6C57dYgtJkuGZGT2+rMkk2n81/abzTJvsqRqGRrWv XRKRXlKdM/dfiuYGokDGxiC0Mg6TYy6wvsR2qRhtXW1OtZkiHWcQCnOttz+8vpew wx8JGMvowtuKB1iMsbwyRqZkFYLcvH+Opfb/Aayi20/ChQLdI6M2R5VU -----END CERTIFICATE------ Jakarta Region
The AWS public certificate for the Jakarta Region is as follows.
-----BEGIN CERTIFICATE----- MIICMzCCAZygAwIBAgIGAXbVDG2yMA0GCSqGSIb3DQEBBQUAMFwxCzAJBgNVBAYT AlVTMRkwFwYDVQQIDBBXYXNoaW5ndG9uIFN0YXRlMRAwDgYDVQQHDAdTZWF0dGxl MSAwHgYDVQQKDBdBbWF6b24gV2ViIFNlcnZpY2VzIExMQzAgFw0yMTAxMDYwMDE1 MzBaGA8yMjAwMDEwNjAwMTUzMFowXDELMAkGA1UEBhMCVVMxGTAXBgNVBAgMEFdh c2hpbmd0b24gU3RhdGUxEDAOBgNVBAcMB1NlYXR0bGUxIDAeBgNVBAoMF0FtYXpv biBXZWIgU2VydmljZXMgTExDMIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCn CS/Vbt0gQ1ebWcur2hSO7PnJifE4OPxQ7RgSAlc4/spJp1sDP+ZrS0LO1ZJfKhXf 1R9S3AUwLnsc7b+IuVXdY5LK9RKqu64nyXP5dx170zoL8loEyCSuRR2fs+04i2Qs WBVP+KFNAn7P5L1EHRjkgTO8kjNKviwRV+OkP9ab5wIDAQABMA0GCSqGSIb3DQEB BQUAA4GBAI4WUy6+DKh0JDSzQEZNyBgNlSoSuC2owtMxCwGB6nBfzzfcekWvs6eo fLTSGovrReX7MtVgrcJBZjmPIentw5dWUs+87w/g9lNwUnUt0ZHYyh2tuBG6hVJu UEwDJ/z3wDd6wQviLOTF3MITawt9P8siR1hXqLJNxpjRQFZrgHqi -----END CERTIFICATE------ China Regions
The AWS public certificate for the China (Beijing) and China (Ningxia) Regions is as follows.
-----BEGIN CERTIFICATE----- MIICSzCCAbQCCQCQu97teKRD4zANBgkqhkiG9w0BAQUFADBqMQswCQYDVQQGEwJV UzETMBEGA1UECBMKV2FzaGluZ3RvbjEQMA4GA1UEBxMHU2VhdHRsZTEYMBYGA1UE ChMPQW1hem9uLmNvbSBJbmMuMRowGAYDVQQDExFlYzIuYW1hem9uYXdzLmNvbTAe Fw0xMzA4MjExMzIyNDNaFw0yMzA4MjExMzIyNDNaMGoxCzAJBgNVBAYTAlVTMRMw EQYDVQQIEwpXYXNoaW5ndG9uMRAwDgYDVQQHEwdTZWF0dGxlMRgwFgYDVQQKEw9B bWF6b24uY29tIEluYy4xGjAYBgNVBAMTEWVjMi5hbWF6b25hd3MuY29tMIGfMA0G CSqGSIb3DQEBAQUAA4GNADCBiQKBgQC6GFQ2WoBl1xZYH85INUMaTc4D30QXM6f+ YmWZyJD9fC7Z0UlaZIKoQATqCO58KNCre+jECELYIX56Uq0lb8LRLP8tijrQ9Sp3 qJcXiH66kH0eQ44a5YdewcFOy+CSAYDUIaB6XhTQJ2r7bd4A2vw3ybbxTOWONKdO WtgIe3M3iwIDAQABMA0GCSqGSIb3DQEBBQUAA4GBAHzQC5XZVeuD9GTJTsbO5AyH ZQvki/jfARNrD9dgBRYZzLC/NOkWG6M9wlrmks9RtdNxc53nLxKq4I2Dd73gI0yQ wYu9YYwmM/LMgmPlI33Rg2Ohwq4DVgT3hO170PL6Fsgiq3dMvctSImJvjWktBQaT bcAgaZLHGIpXPrWSA2d+ -----END CERTIFICATE------ GovCloud Regions
The AWS public certificate for the AWS GovCloud Regions is as follows.
-----BEGIN CERTIFICATE----- MIIDCzCCAnSgAwIBAgIJAIe9Hnq82O7UMA0GCSqGSIb3DQEBCwUAMFwxCzAJBgNV BAYTAlVTMRkwFwYDVQQIExBXYXNoaW5ndG9uIFN0YXRlMRAwDgYDVQQHEwdTZWF0 dGxlMSAwHgYDVQQKExdBbWF6b24gV2ViIFNlcnZpY2VzIExMQzAeFw0yMTA3MTQx NDI3NTdaFw0yNDA3MTMxNDI3NTdaMFwxCzAJBgNVBAYTAlVTMRkwFwYDVQQIExBX YXNoaW5ndG9uIFN0YXRlMRAwDgYDVQQHEwdTZWF0dGxlMSAwHgYDVQQKExdBbWF6 b24gV2ViIFNlcnZpY2VzIExMQzCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA qaIcGFFTx/SO1W5G91jHvyQdGP25n1Y91aXCuOOWAUTvSvNGpXrI4AXNrQF+CmIO C4beBASnHCx082jYudWBBl9Wiza0psYc9flrczSzVLMmN8w/c78F/95NfiQdnUQP pvgqcMeJo82cgHkLR7XoFWgMrZJqrcUK0gnsQcb6kakCAwEAAaOB1DCB0TALBgNV HQ8EBAMCB4AwHQYDVR0OBBYEFNWV53gWJz72F5B1ZVY4O/dfFYBPMIGOBgNVHSME gYYwgYOAFNWV53gWJz72F5B1ZVY4O/dfFYBPoWCkXjBcMQswCQYDVQQGEwJVUzEZ MBcGA1UECBMQV2FzaGluZ3RvbiBTdGF0ZTEQMA4GA1UEBxMHU2VhdHRsZTEgMB4G A1UEChMXQW1hem9uIFdlYiBTZXJ2aWNlcyBMTEOCCQCHvR56vNju1DASBgNVHRMB Af8ECDAGAQH/AgEAMA0GCSqGSIb3DQEBCwUAA4GBACrKjWj460GUPZCGm3/z0dIz M2BPuH769wcOsqfFZcMKEysSFK91tVtUb1soFwH4/Lb/T0PqNrvtEwD1Nva5k0h2 xZhNNRmDuhOhW1K9wCcnHGRBwY5t4lYL6hNV6hcrqYwGMjTjcAjBG2yMgznSNFle Rwi/S3BFXISixNx9cILu -----END CERTIFICATE-----
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Verify the instance identity document.
PS C:\>[Security.Cryptography.X509Certificates.X509Certificate2]::new((Resolve-Pathcertificate.pem)).PublicKey.Key.VerifyData($Document, 'SHA256',$Signature)If the signature is valid, the command returns
True. If the signature cannot be verified, contact AWS Support.
Verify using the PKCS7 signature
Verify using the RSA-2048 signature