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This article is valid for Smart ID Identity Manager 24.R1 or later.

The sign and encrypt engine has one configuration file. On Docker deployments it is located in docker/compose/identitymanager/config/signencrypt.xml, on WAR deployments it is located in WEB-INF/classes/engineSignEncryptConfig.xml of IDM Admin and IDM Operator.
There are also several tools including a similar configuration file.

Structure of the configuration file

The configuration is divided into entries for descriptors and keys. Each descriptor handles one distinct use case and uses one of the key-entries.

Descriptor

IDM references descriptors by their name: for each use case there is a known descriptor name. Most names are fixed (e.g. ConfigZipEncrypter is always used for encrypting configuration files) and a few can be named arbitrarily (e.g. descriptors for PIN blob decryption).

Descriptor example

<descriptor name="ObjectHistorySigner" version="1">
    <type algorithm="SHA-256" key="objectHistorySignerCert" />
</descriptor>

See the following tables for more information on the different possible attributes of a descriptor/-type.

descriptor element attribute

Description

name

Used by Identity Manager to refer to this descriptor. There might be different descriptors with the same name but with different versions.

version

A numeric value that denotes the descriptor's version. This is only needed for the ObjectHistorySigner.
A new version of a descriptor is needed, for example, when an old key needs to be replaced.
The descriptor with the highest version number is used. Verification of Object History entries will automatically select the right descriptor version.

Attribute of the type element inside descriptor

Description

algorithm

For EncryptedFields/ConfigZipEncrypter: symmetric algorithm to be used, usually AES/CBC/PKCS7Padding.

For SelfServiceJWTSigner/ContentProviderJWSSigner: always RSA.

For ConfigZipSigner/ObjectHistorySigner: hashing algorithm to be used (for example, SHA-256).

For SignEmailDescriptor/hermodDeviceEnc/att_* and pin-blob decryption descriptors:
signature algorithm to be used (for example, SHA256withRSA).

For idopteAuthentication: always NoneWithRSA.

size

For EncryptedFields/ConfigZipEncrypter only.
Size of the symmetric key, either 128or 256 (recommended).

result

For EncryptedFields only.
Output format, currently always NX02.

key

The descriptor’s key. Refers to a key defined in the same document.

asymCipher

For EncryptedFields/ConfigZipEncrypter only.
Cipher definition, e.g. RSA/None/OAEPWithSHA384AndMGF1Padding.

When used with an HSM, you need to adjust the cipher format to be compatible with the JCE provider
used for HSM access. 
For example, instead of the above cipher definition, specify RSA/ECB/OAEPWithSHA-384AndMGF1Padding
(ECBinstead of Noneand SHA-384 instead of SHA384).

initVector

Only needed for migrating EncryptedFields from SmartAct or ProAct: a fixed Initialization Vector (IV).

For other descriptors, omit this attribute in order to use randomly generated IVs.

Descriptor versioning

The ObjectHistorySigner supports multiple versions. You can replace its key by adding a descriptor with the same name and a newer version, and leaving the existing descriptor with the old version configured. This will cause any new signatures to be created with the new key, but you can still verify signatures made with the old one.

See the following example:

<?xml version="1.0" encoding="UTF-8"?>
<engineSignEncrypt>
    <descriptors>
        <descriptor name="ObjectHistorySigner" version="2">
            <type algorithm="SHA-256" key="newKey" />
        </descriptor>
        <descriptor name="ObjectHistorySigner" version="1">
            <type algorithm="SHA-256" key="oldKey" />
        </descriptor>       
        <!-- others descriptors -->
    </descriptors>
    <keys>
        <key name="newKey">
            <type name="pkcs12" locationValue="classpath:sign_new.p12" pin="1234"/>
        </key>
        <key name="oldKey">
            <type name="pkcs12" locationValue="classpath:sign_old.p12" pin="1234"/>
        </key>
        <!-- other keys -->
    </keys>
</engineSignEncrypt>

There are also descriptors which cannot be versioned, e.g. EncryptedFields. For those the version always needs to be set to 1.

Currently most descriptors either do not support versioning at all or do not benefit from defining multiple versions.

Key

Key elements are referenced by the descriptors. They describe keys found in HSMs and/or keystores. Each key should be used by only one descriptor.

Key example

<key name="objectHistorySignerCert">
    <type name="pkcs12" locationValue="classpath:sign.p12" pin="1234"/>
</key>

See the tables below for more information about the key/-type.

key element attribute

Description

name

Used by descriptors' key attribute to reference this key.

Attribute of the type element inside key

Description

name

Type of storage: pkcs12or HSM.

locationValue

  • For docker:

    • For a software keystore (pkcs12): place the keystore under docker/compose/certs before creating the container with docker compose. Then set its location as absolute path, prefixed with file: pointing to the mounted file in/certs (inside the container),
      for example: locationValue="file:/certs/keystore.p12".
      Note: Default attestation keys are referenced from the classpath, e.g. locationValue="classpath:attKeyMobileDef.p12". Change this only if you need your own keys.

    • For an HSM: ensure the PKCS11 library is mounted into the container, then use the container’s path of the PKCS11 library, without filename extension, for example: locationValue="/usr/local/lib/libpkcs11hsm"

  • For WAR file deployment: 

    • For a software keystore: place the keystore under WEB-INF/classes and set its location, prefixed with classpath:,
      for example: locationValue="classpath:keystore.p12"

    • For an HSM: use the path of the PKCS11 library, without filename extension,
      for example: locationValue="/usr/local/lib/libpkcs11hsm"

pin

PIN for the keystore or HSM.

To avoid having clear text PINs in this file, the pin should be scrambled.
That can be achieved by setting it with pin.encrypted="1234" instead of pin="1234".

For WAR deployments the pin will then be scrambled on the next (re-)start of Tomcat.

For Docker deployments you need to scramble the pins with a dedicated tool while IDM Admin / IDM Operator containers are not running.

After scrambling, the PIN will look something like pin="encrypted:someBase64EncodedValue"
See Scramble sensitive data in Identity Manager files for detailed instructions.

Example configuration file

This is how a typical configuration file looks like. 

<?xml version="1.0" encoding="UTF-8"?>
<engineSignEncrypt>
    <descriptors>
        <descriptor name="EncryptedFields" version="1">
            <type algorithm="AES/CBC/PKCS7Padding" size="256" result="NX02" key="encCert" 
                  asymCipher="RSA/None/OAEPWithSHA384AndMGF1Padding"/>
        </descriptor>
        <descriptor name="ConfigZipEncrypter" version="1">
            <type algorithm="AES/CBC/PKCS7Padding" size="256" key="configZipEncrypterCert"
                  asymCipher="RSA/None/OAEPWithSHA384AndMGF1Padding"/>
        </descriptor>
        <descriptor name="ConfigZipSigner" version="1">
            <type algorithm="SHA-256" key="configZipSignerCert" />
        </descriptor>
        <descriptor name="ObjectHistorySigner" version="1">
            <type algorithm="SHA-256" key="objectHistorySignerCert" />
        </descriptor>
        <descriptor name="ObjectHistorySigner" version="2">
            <type algorithm="SHA-256" key="newObjectHistorySignerCert" />
        </descriptor>
        <descriptor name="SignEmailDescriptor" version="1">
            <type algorithm="SHA256withRSA" key="emailSigningCert" />
        </descriptor>
        <descriptor name="hermodDeviceEnc" version="1">
            <type algorithm="SHA256withRSA" key="serverCert" />
        </descriptor>
        <descriptor name="SelfServiceJWTSigner" version="1">
            <type algorithm="RSA" key="selfServiceJWTSignerCert" />
        </descriptor>
        <descriptor name="ContentProviderJWSSigner" version="1">
            <type algorithm="RSA" key="contentProviderJWSSignerCert" />
        </descriptor>
        <descriptor name="att_external-attestation-1" version="1">
            <type algorithm="SHA256withRSA" key="attestationKey_mobile_1" />
        </descriptor>
        <descriptor name="att_external-attestation-2" version="1">
            <type algorithm="SHA256withRSA" key="attestationKey_mobile_2" />
        </descriptor>
        <descriptor name="att_external-attestation-3" version="1">
            <type algorithm="SHA256withRSA" key="attestationKey_mobile_3" />
        </descriptor>
        <descriptor name="att_external-attestation-4" version="1">
            <type algorithm="SHA256withRSA" key="attestationKey_mobile_4" />
        </descriptor>
        <descriptor name="att_ATTESTATION" version="1">
            <type algorithm="SHA256withRSA" key="attestationKey_mobile_pda_def" />
        </descriptor>
    </descriptors>
    <keys>
        <key name="encCert">
            <type name="pkcs12" locationValue="classpath:hybridEncKeypair.p12" pin="encrypted:UPYN6QD/Vd45fbrQ/QF2DrYlRbaBOvriXkD3OxWLetgiXbQ="/>
        </key>
        <key name="configZipEncrypterCert">
            <type name="pkcs12" locationValue="classpath:encryptConfig.p12" pin="encrypted:waKnF9aR6YCwamkL5/aKfVk3A1YjZbApclCpwmRuScmSfm0="/>
        </key>
        <key name="configZipSignerCert">
            <type name="pkcs12" locationValue="classpath:signConfig.p12" pin="encrypted://1p2CV3vDLvjyCuQKj4Zg2gSJGNhJ3R5qfgPKnqoyVwhGA="/>
        </key>
        <key name="newObjectHistorySignerCert">
            <type name="pkcs12" locationValue="classpath:historySignNew.p12" pin="encrypted:RC1w/BVMH1bwgM4DGKUeMvxIYonTKXrPa/sKr+JFbWgd/4o="/>
        </key>
        <key name="objectHistorySignerCert">
            <type name="pkcs12" locationValue="classpath:historySign.p12" pin="encrypted:nr7t9dSRu21RWpc95C6/JyczKI2wMkOo+93JLy7da/jkg7E="/>
        </key>
        <key name="selfServiceJWTSignerCert">
            <type name="pkcs12" locationValue="classpath:signJWT.p12" pin="encrypted:8ri1LiK3J8Ur8F1wSw0Qa/UYDoaJjo85I4QZC9mX9f/H7zc="/>
        </key>
        <key name="contentProviderJWSSignerCert">
            <type name="pkcs12" locationValue="classpath:signJWS.p12" pin="encrypted:4Kj0VidwLlISBKXAFZ+ZorOjL4HK6c86zESBaeoPWJ6oEcI="/>
        </key>
        <key name="emailSigningCert">
            <type name="pkcs12" locationValue="classpath:emailSigning.p12" pin="encrypted:mwd15YNfR2LyUaLtoCIO9R0fGvd3O2z7kfaYw2ObSqsigtA="/>
        </key>
        <key name="serverCert">
            <type name="pkcs12" locationValue="classpath:deviceEncCA.p12" pin="encrypted:yZJ7NcLs82mSs/nmV0s83c/sjvDA1kXspYWjvD3D7KsAS/c="/>
        </key>
        <key name="attestationKey_mobile_1">
            <type name="pkcs12" locationValue="classpath:attKeyMobile1.p12" pin="936584967"/>
        </key>
        <key name="attestationKey_mobile_2">
            <type name="pkcs12" locationValue="classpath:attKeyMobile2.p12" pin="873145568"/>
        </key>
        <key name="attestationKey_mobile_3">
            <type name="pkcs12" locationValue="classpath:attKeyMobile3.p12" pin="8564789632"/>
        </key>
        <key name="attestationKey_mobile_4">
            <type name="pkcs12" locationValue="classpath:attKeyMobile4.p12" pin="9263564893"/>
        </key>
        <key name="attestationKey_mobile_pda_def">
            <type name="pkcs12" locationValue="classpath:attKeyMobileDef.p12" pin="2586453793"/>
        </key>
    </keys>
</engineSignEncrypt>
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