Entrust provides the following S/MIME Secure Email certificate profiles.
- smime-digital-signature-key-encipherment
- smime-key-encipherment
- smime-non-repudiation
These profiles support the following features.
S/MIME use cases
All S/MIME Secure Email profiles support the following use cases.
- ECS Enterprise UI
- CA Gateway API
S/MIME key usages
See below the Key Usage and Extended Key Usage (EKU) extension values each profile supports.
Profile | Key Usage | Extended Key Usage |
|---|---|---|
smime-digital-signature-key-encipherment | Digital Signature, Key Encipherment | TLS client authentication (1.3.6.1.5.5.7.3.2) Email Protection (1.3.6.1.5.5.7.3.4) |
smime-key-encipherment | Key Encipherment | Email Protection (1.3.6.1.5.5.7.3.4) |
smime-non-repudiation | Digital Signature, Non-Repudiation | Email Protection (1.3.6.1.5.5.7.3.4) |
S/MIME certificate fields
All S/MIME Secure Email profiles set the following certificate fields.
Field | Value |
|---|---|
Issuer | Customer's subordinate issuing CA. |
Subject | No constraint. |
Validity period | Less than or equal to the expiry of the issuing CA. Defaults to 1 year if not specified in the request. |
S/MIME certificate extensions
All S/MIME Secure Email profiles set the following certificate extensions.
Extension | Critical | Value |
|---|---|---|
AIA | No | Supplied if the customer enables OCSP when creating the CA |
Authority Key Identifier | No | Matches subjectKeyIdentifier of the signing certificate |
Basic Constraints | Yes | cA =False |
CRL Distribution Points | No | Always present |
Subject Alternative Name | No | No constraints |
Subject Key Identifier | No | «The leftmost 160-bits of the SHA-256 hash of the value of the BIT STRING subjectPublicKey» as described in RFC 7093 section 2 |
S/MIME distinguished names
Entrust has no restriction on Distinguished Names (DNs) per certificate profile. All certificate profiles support the following identifiers.
Alias | OID |
|---|---|
'CN' 'CommonName' | 2.5.4.3 |
'SN' 'SurName' | 2.5.4.4 |
'SERIALNUMBER' 'DeviceSerialNumber' | 2.5.4.5 |
'C' 'Country' | 2.5.4.6 |
'L' 'Locality' | 2.5.4.7 |
'ST' 'S' 'State' | 2.5.4.8 |
'STREET' 'StreetAddress' | 2.5.4.9 |
'O' 'Org' 'Organization' | 2.5.4.10 |
'OU' 'OrganizationalUnit' 'OrganizationUnit' 'OrgUnit' | 2.5.4.11 |
'T' 'Title' | 2.5.4.12 |
'BUSINESSCATEGORY' | 2.5.4.15 |
'POSTALCODE' | 2.5.4.17 |
'givenName' 'G' | 2.5.4.42 |
'I' 'Initials' | 2.5.4.43 |
'ORGANIZATIONIDENTIFIER' | 2.5.4.97 |
'UID' | 0.9.2342.19200300.100.1.1 |
'DC' 'DomainComponent' | 0.9.2342.19200300.100.1.25 |
'Email' 'E' | 1.2.840.113549.1.9.1 |
'unstructuredName' | 1.2.840.113549.1.9.2 |
'unstructuredAddress' | 1.2.840.113549.1.9.8 |
'JurisdictionOfIncorporationLocalityName' | 1.3.6.1.4.1.311.60.2.1.1 |
'JurisdictionOfIncorporationStateOrProvinceName' | 1.3.6.1.4.1.311.60.2.1.2 |
'JurisdictionOfIncorporationCountryName' | 1.3.6.1.4.1.311.60.2.1.3 |
'TrademarkOfficeName' | 1.3.6.1.4.1.53087.1.2 |
'TrademarkCountryOrRegionName' | 1.3.6.1.4.1.53087.1.3 |
'TrademarkRegistration' | 1.3.6.1.4.1.53087.1.4 |
'LegalEntityIdentifier' | 1.3.6.1.4.1.53087.1.5 |
'WordMark' | 1.3.6.1.4.1.53087.1.6 |
'MarkType' | 1.3.6.1.4.1.53087.1.13 |
'StatuteCountryName' | 1.3.6.1.4.1.53087.3.2 |
'StatuteStateOrProvinceName' | 1.3.6.1.4.1.53087.3.3 |
'StatuteLocalityName' | 1.3.6.1.4.1.53087.3.4 |
'StatuteCitation' | 1.3.6.1.4.1.53087.3.5 |
'StatuteURL' | 1.3.6.1.4.1.53087.3.6 |