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Remember to update the release version number before publishing externally.

Descriptor overview

The engine’s descriptors are the following:

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Each descriptor is described in detail in the sections below, including requirements how it shall be bootstrappedincluding requirements how it shall be bootstrapped.

Certain descriptors are used for optional features. If a certain feature (for example email signing) is not used in a given deployment, then you may configure the descriptor in question with a placeholder. Any PKCS#12 file containing a self-signed keypair will be sufficient in this case.

EncryptedFields

Use

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case

Encryption and decryption of fields in the Identity Manager database

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Use

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case

Encryption of the configuration files

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Use

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case

Signing and validation of the configuration files

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• If key usage extension is critical, then digitalSignature is required

• Issuing CA cert must be in IDM truststore

• Must not be self-signed

• Validity considerations:

  • if expired download is blocked unless ZIP signing is disabled

  • if expired config upload will fail with the message "Verification failed. The certificate has expired."

• Issues if not configured as above:

  • export is blocked unless unless ZIP signing is disabled

  • verification does not work, ZIP appears unsigned

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Use

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case

Signing and verification of the object history

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• Placeholder allowed only if history verification is disabled (via activitiHistoryCleanerJobTrigger.cronExpression set to a date in the distant future. See List of Identity Manager system properties and Quartz CronTrigger tutorial for more information)

  • Integrity of history signature would be as risk

  • Re-signing requires use of the batch_re-sign_history tool once the first history entry is created

  • If you plan on enabling it at a later date, it is recommended not to use a placeholder

Key requirements

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Use

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case

Send signed e-mails emails from IDM

Required

When e-mail email signing is configured

Configured in the following application

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• Placeholders allowed only if email signing is not used

  • Email verification will fail if not issued by a trusted S/MIME CA

  • Integrity of e-mails emails sent by IDM may be at risk if placeholder key is used

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• Proper S/MIME certificate with configured IDM e-mail email sender address in DN's E field and/or SAN RFC-822 entry

  • If subject DN email field is absent, SAN extension must be critical

  • Note: broken Broken support for DN.E was is fixed in IDM 245.0.0.R1

• must not be self-signed

• Key usage:
  If present, must be critical and at least either digitalSignature or nonRepudiation

• Validity:
  Adhering to CAB-Forum requirements from https://cabforum.org/working-groups/smime/requirements/#632-certificate-operational-periods-and-key-pair-usage-periods

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Use

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case

Generate dummy certificate for transient key-pairs generated on a target device when provisioning Smart ID Mobile/Desktop App profiles (the certificates themselves are merely used as transport container for the key-usage parameter)

Required

TODO: David Banz what should we add here? This info is missing.

Configured in the following application

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Use

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case

Authentication of Smart ID Self-Service users to the Identity Manager backend

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Use case

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Signing content for Visual ID provisioning to Smart ID Mobile App

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Configured in the following applications

• Identity Manager Operator (

  see

  See Set up visual ID layout in Identity Manager for more information.)storage: pkcs12,

Storage

• HSM (recommended)versioning: possible)

• pkcs12

Versioning

Possible, but unnecessary.

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General requirements

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• placeholder

  Placeholder allowed only if Visual ID is not used

  • if

    If the certificate configured here is not trusted by the end-user (mobile-) device, then Visual ID provisioning will fail

  • forgery

    Forgery of Visual ID possible if placeholder key is used and also trusted by the end-user device

  key

Key requirements

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Supported types

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• RSA 2048

• RSA 3072

• RSA 4096 (recommended)certificate

Certificate requirements

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• must

  Must not be self-signed

  !

• key

  Key usage is not checked (recommended for informational purposes: set digitalSignature)

• issuing

  Issuing CA cert must be trusted by the app onto which to provision Visual IDs

• validity

  Validity: at your discretion (make sure you do not forget to renew before the expiry date!), validity is checked on the SDK side

• versioning Versioning not needed (always uses the default (i.e. that is, highest) version)

Misc Attestation Key Descriptors (att_…)

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Default descriptor names

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• att_external-attestation-1 (mobile only)

•  att_external-attestation-2 (mobile only)

•  att_external-attestation-3 (mobile only)

•  att_external-attestation-4 (mobile only)

•  att_ATTESTATION (mobile+desktop, default)use-

Use case

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• verify

  Verify Certification Signing Requests (CSR) from Smart ID Mobile/Smart ID Desktop App.

• optionally

  Optionally limit profile provisioning with Smart ID Mobile/Smart ID Desktop App to certain devices,

  e.g.

  for example company devices. This can be done by using Mobile/Desktop apps with custom private keys and configuring the corresponding public keys

  into IDM

  in Identity Manager (by default

  IDM

  Identity Manager includes certificates for the built-in keys of any Mobile and Desktop App installation)configured

Configured in

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the following applications

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• Identity Manager Operator

• Identity Manager Admin (technically not used here, but required for startup due to bean requirements - subject to change in future releases)

• versioning: supported

storage: pkcs12,

Storage

• HSM (recommended)

• general requirements:

  default

  pkcs12

Versioning

Supported

General requirements

• Default certificates do not need to be changed, unless you want to limit profile provisioning to certain devices

• no

  No private keys is configured for

  IDM

  Identity Manager, only each public key inside a certificatekey

Key requirements

...

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Supported types

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• RSA 2048

• RSA 3072

• RSA 4096 (recommended)certificate

Certificate requirements

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• when

  When replacing, generated via tooling shown here: 

  https://doc.nexusgroup.com/pub/configure-custom-attestation-keys verification

  Configure custom attestation keys

• Verification only uses the key, no part of the certificate is considered

• key

  Key usage is not checked (recommended for informational purposes: set digitalSignature)

• validity

  Validity is ignored

idopteAuthentication

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Use case

Initial handshake with Idopte client-side middleware, see Encoding using Idopte middleware in Identity Manager

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Configured in

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the following application

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• Identity Manager Operatorstorage:

Storage

• pkcs12

Versioning

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Not supported (always uses the default (

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that is, highest) version

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Supported algorithm

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values

• NONEwithRSAgeneral

General requirements

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• descriptor

  Descriptor can be omitted entirely (not even a placeholder needed) if Idopte middleware is not used, otherwise correct certificate and keypair is required

• PKI card encoding via the Idopte middleware will fail if missing or configured incorrectlykey

Key requirements

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Supported types

• RSA 2048certificate

Certificate requirements

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• Idopte webapp cert, issued by Idopte based on CSR for a customer-generated keypair

• one

  One customer-specific SAN URI (does not have to point to an existing website),

  e.g.

  for example https://idopte.customer.com (using hosts like localhost or 127.x.y.z is discouraged, as it severely restricts the maximum validity period of the certificate Idopte can issue)

• validity

  Validity: defined by the Idopte CA

insideClientAuth

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Use case

Authenticate to the IN Groupe Inside Server, which performs certain cryptographic operations on behalf of IDM when using the Idopte middleware (see Encoding using Idopte middleware in Identity Manager)

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configured in this application:

• Identity Manager Operator

general requirements:

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Configured in the following applications

• Identity Manager Operator

Storage

• pkcs12

Versioning

Not needed

General requirements

• Descriptor can be omitted entirely (not even a placeholder needed) if Idopte middleware is not used, otherwise correct certificate and keypair is required

• PKI card encoding via the Idopte middleware will fail if missing or configured incorrectly

• algorithm Algorithm attribute not used

  •  (we We only use certificate and private key from the descriptor)

• versioning: not needed

• storage: pkcs12

key requirements:

supported types:

Key requirements

Supported types

• RSA 2048

• RSA 3072

• RSA 4096 (recommended)certificate

Certificate requirements

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• validity

  Validity DOES matter, connection to Inside server will fail when expired

• recommend

  Recommend to use a CA, unclear if self-signed certificates work

• must

  Must be trusted by Inside server

• key

  Key usage: digitalSignature

Pin-Blob Decryption Descriptors

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Descriptor names

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Can be any descriptor listed in the pinBlobDecryptor.keyDescriptorNames property of system.properties (or its

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docker counterpart)

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Use case

Decrypting pin-blobs from pre-personalized cards to

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for example print pin letters for them (see Encodings using Personal Desktop Client middleware in Identity Manager (section "Read encrypted PINs")

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Configured in the following applications

• Identity Manager Operator

• supported algorithm value: RSA

• storage: pkcs12, HSM (recommended)

• versioning: not needed

general requirements:

by

Storage

• pkcs12

Versioning

Not needed

Supported algorithm values

• RSA

General requirements

• By default the property is empty, hence no descriptors  are needed, unless the feature is requiredkey

Key requirements

...

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Supported types

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• RSA 2048certificate

Certificate requirements

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• issued

  Issued by Nexus Certificate Manager

• validity

  Validity ignored by IDM

• does

  Does not need to be trusted by IDM

• key

  Key usage is not checked (recommended for informational purposes: set dataEncipherment + keyEncipherment)

Additional information

For more information, see Encrypt configuration files in Identity Manager.

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