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en:cades-t

CAdES-T

General Information

The ES-T (Electronic Signature with Time) signature is a type of signature that contains the timestamp information, which basically includes the BES signature and also signifies the date when the signature was legally created. The creation time of the signature is secured with a timestamp. Since the time for signature creation is guaranteed, if the certificate and signature are valid at the time the signature is created, the signature is also valid after the revocation or expiration of the certificate.

It is not enough to secure a signature with a timestamp for long-term validation. In order to verify the signature, the relevant revocation data and certificates are required. For this reason, the ES-X LONG signature is recommended.

CAdES-T

The following table specifies the signature properties that must be included in the signature file for CAdES-T signature format:

Signature Properties CAdES-T
Signed Attributes Content-type M
Message-digest M
ESS signing-certificate v2 M
Signing-time O
Content-hints O
Mime-type M
Content-reference O
Content-identifier O
Commitment-type-indication O
Signer-location O
Content-time-stamp O
Signature-policy-identifier O
Unsigned Attributes CounterSignature O
Signature-time-stamp M
Complete-certificate-references -
Complete-revocation-references -
Certificate-values -
Revocation-values -
CAdES-C-time-stamp -
CAdES-C-time-stamped-certs-crls-references -
Archive-time-stamp -

M: Must - It is mandatory to provide the specified substance. If the substance is not provided, the e-signature conformity assessment will result in a negative.

O: Optional – It is optional to provide the specified substance. If the substance is not provided, the e-signature conformity assessment will not result in a negative.

- : This means that the attribute is not in the signature format.

It is recommended not to use optional attributes unless needed.

The timestamp received from the user's system clock or the owner of the signature application does not guarantee the accuracy of the signature time as it is signed by a trusted server. For this reason, it is not recommended to use the signing time attribute. If it is used, it must be adjusted so that it is left behind from the timestamp.

Procedure

You can access CAdES-T Detached Test Package from here.

You can access CAdES-T Attached Test Package from here.

You can access test root certificates from here.

The following table provides the names and properties of the signature files to be used in the procedures:

M/O Signed Document Name Signed Document Property Validation ResultExplanation
M EST_1 Valid (Revocation check is available only via CRL and all signed attributes are added) VALID All signed attributes must be displayed in the validation result
O EST_2.doc Signature file with a macro inserted content INVALID The signature should not be verified
M EST_3 Contradictory signature file including “mime-type” attribute with “image/jpeg” value although the actual content type is “Application/pdf” INVALID Signature verification details must be shown
M EST_4Signature file with a forged “ESS Signing-Certificate-v2” attribute INVALID Signature verification details must be shown
M EST_5 Signature file with a forged ”message-digest” attribute INVALID Signature verification details must be shown
M EST_6Signature file in which SHA-1 digest algorithm is used VALID The signature must be archived
M EST_7Signature file with a forged signature INVALID Signature verification details must be shown
M EST_8 Valid (Revocation check is available only via OCSP) VALID
M EST_9Signature file signed by a certificate with an omitted “non-repudiation” field in the key usage extension INVALID Signature verification details must be shown
M EST_10Signer certificate with an omitted “UserNotice” text field in the “CertificatePolicies” extension INVALID Signature verification details must be shown
M EST_11Signer certificate with an omitted ETSI OID in “QualifiedCertificateStatements” extension INVALID Signature verification details must be shown
M EST_12Signer certificate with an omitted ICTA OID in “QualifiedCertificateStatements” extension INVALID Signature verification details must be shown
O EST_13Signature file which has a PDF/A-3 content with attachment INVALID The signature must not be verified
M EST_14Signer certificate has expired before signature timestamp INVALID Signature verification details must be shown
M EST_15Signer certificate has a forged signature INVALID Signature verification details must be shown.
M EST_16_1Signature file signed by a revoked certificate before signature timestamp (Revocation check is available only via CRL) INVALID Signature verification details must be shown.
M EST_16_2Signer certificate has revoked after signature timestamp (Revocation check is available only via CRL) VALID
M EST_17_1Signer certificate has revoked before signature timestamp (Revocation check is available only via OCSP) INVALID Signature verification details must be shown.
M EST_17_2Signer certificate revoked in OCSP after signature timestamp (Revocation check is available only via OCSP) VALID
M EST_18The validity of signer certificate has to be checked via an expired CRL INVALID Signature verification details must be shown.
M EST_19The validity of signer certificate has to be checked via a signature forged CRL INVALID Signature verification details must be shown.
M EST_20The validity of signer certificate has to be checked via an expired OCSP response INVALID Signature verification details must be shown.
M EST_21The validity of signer certificate has to be checked via an OCSP response having forged signature INVALID Signature verification details must be shown.
M EST_22The validity of signer certificate has to be checked via an OCSP response which is signed by an expired OCSP certificate INVALID Signature verification details must be shown.
M EST_23The validity of signer certificate has to be checked via an OCSP response which is signed by a signature forged OCSP certificate INVALID Signature verification details must be shown.
M EST_24_1 The validity of signer certificate has to be checked via an OCSP response which is signed by a revoked OCSP certificate. The OCSP certificate is revoked before signature timestamp INVALID Signature verification details must be shown.
M EST_24_2 The validity of signer certificate has to be checked via an OCSP response which is signed by a revoked OCSP certificate. The OCSP certificate is revoked after signature timestamp VALID
M EST_25 Signer certificate has a monetary limit which is equal to “0” CHOICE*
O EST_26 Signer certificate has a usage restriction defined in “QC Statements” extension INVALID The signature should not be verified.
M EST_27 The validity of signer certificate has to be checked via an OCSP response which is generated for a different certificate INVALID Signature verification details must be shown.
M EST_28 Signer certificate is issued by an intermediate CA certificate having a forged signature INVALID Signature verification details must be shown.
M EST_29_1 Signer certificate is issued by an intermediate CA certificate which is revoked in CRL before signature timestamp INVALID Signature verification details must be shown.
M EST_29_2 Signer certificate is issued by an intermediate CA certificate which is revoked in CRL after signature timestamp VALID
M EST_30 Signer certificate is issued by an intermediate CA certificate whose validity has to be checked via an expired CRL INVALID Signature verification details must be shown.
M EST_31 Signer certificate is issued by an intermediate CA certificate whose validity has to be checked via a forged signature CRL INVALID Signature verification details must be shown.
M EST_32_1 Signer certificate is issued by an intermediate CA certificate which is revoked in OCSP before signature timestamp INVALID Signature verification details must be shown.
M EST_32_2 Signer certificate is issued by an intermediate CA certificate which is revoked in OCSP after signature timestamp VALID
M EST_33 Signer certificate is issued by an intermediate CA certificate whose validity has to be checked via an expired OCSP response INVALID Signature verification details must be shown.
M EST_34 The validity of intermediate CA certificate has to be checked via an OCSP response which has a forged signature INVALID Signature verification details must be shown.
M EST_35 The validity of intermediate CA certificate has to be checked via an OCSP response which is signed by an expired OCSP certificate INVALID Signature verification details must be shown.
M EST_36 The validity of intermediate CA certificate has to be checked via an OCSP response which is signed by a signature forged OCSP certificate INVALID Signature verification details must be shown.
M EST_37_1 The validity of intermediate CA certificate has to be checked via an OCSP response which is signed by a revoked OCSP certificate. The OCSP certificate is revoked before signature timestamp INVALID Signature verification details must be shown.
M EST_37_2 The validity of intermediate CA certificate has to be checked via an OCSP response which is signed by a revoked OCSP certificate. The OCSP certificate is revoked after signature timestamp VALID
M EST_38 The root certificate has a forged signature INVALID Signature verification details must be shown.
M EST_39_s Counter signature file signed by two signers. Second signer has a valid certificate, but the first signer is configured with the required intermediate CA certificate which is revoked INVALID Validation result of the each signer must be shown in a hierarchical order similar to the tree structure. Signature verification details must be shown.
M EST_39_p Parallel signature file signed by two signers. Second signer has a valid certificate, but the first signer is configured with the required intermediate CA certificate which is revoked INVALID Each signature validation result must be shown in a hierarchical order similar to the tree structure. The details of the error should be reported to the user.
M EST_40 Signature timestamp has a “TSTInfo” with a forged “messageImprint” field (TS server is TSA1) INVALID Signature verification details must be shown.
M EST_41 Signature timestamp has a forged signature (TS server is TSA2) INVALID Signature verification details must be shown.
M EST_42 Signature timestamp is signed by an expired certificate (TS server is TSA3) INVALID Signature verification details must be shown.
M EST_43 Signature timestamp is signed by a certificate with a forged signature (TS server is TSA4) INVALID Signature verification details must be shown.
M EST_44 Signature timestamp is signed by a revoked certificate. The TS certificate is revoked before signature timestamp (TS server is TSA5) INVALID Signature verification details must be shown.
M EST_45 Signature timestamp is signed by a revoked certificate.The TS certificate is revoked after signature timestamp (TS server is TSA5) VALID
M EST_46 Signature timestamp is signed by a certificate whose issuer certificate is forged (TS server is TSB) INVALID Signature verification details must be shown.
M EST_47 Signature timestamp is signed by a valid certificate (TS server is TSC1) VALID
M EST_48 Signature timestamp is signed by a certificate which references an expired CRL (TS server is TSC2) INVALID Signature verification details must be shown.
M EST_49 Signature timestamp is signed by a certificate which references a CRL with a forged signature (TS server is TSC3) INVALID Signature verification details must be shown.
O EST_110 Signature file without a “mime-type” attribute INVALID The signature should not be verified.

* One of the following methods must be selected when verifying the signed document if the signer certificate includes a monetary limit:

  • “INVALID Signature” message must be displayed. The description of the error should be reported to the user.
  • The monetary limit of the certificate is compared with the monetary limit of the signed document and if the monetary limit of the certificate is sufficient for the monetary value of the signed document, “VALID Signature” message must be displayed.
  • In the case where the monetary limit of the certificate is not compared with the monetary limit of the signed document, the user should be warned that the signer certificate has a monetary limit and “VALID Signature” message must be displayed.
en/cades-t.txt · Last modified: 2023/07/14 13:08