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.\" ========================================================================
.\"
.IX Title "TS 1"
.TH TS 1 "2023-09-11" "1.1.1w" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
openssl\-ts, ts \- Time Stamping Authority tool (client/server)
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBopenssl\fR \fBts\fR
\&\fB\-query\fR
[\fB\-rand file...\fR]
[\fB\-writerand file\fR]
[\fB\-config\fR configfile]
[\fB\-data\fR file_to_hash]
[\fB\-digest\fR digest_bytes]
[\fB\-\f(BIdigest\fB\fR]
[\fB\-tspolicy\fR object_id]
[\fB\-no_nonce\fR]
[\fB\-cert\fR]
[\fB\-in\fR request.tsq]
[\fB\-out\fR request.tsq]
[\fB\-text\fR]
.PP
\&\fBopenssl\fR \fBts\fR
\&\fB\-reply\fR
[\fB\-config\fR configfile]
[\fB\-section\fR tsa_section]
[\fB\-queryfile\fR request.tsq]
[\fB\-passin\fR password_src]
[\fB\-signer\fR tsa_cert.pem]
[\fB\-inkey\fR file_or_id]
[\fB\-\f(BIdigest\fB\fR]
[\fB\-chain\fR certs_file.pem]
[\fB\-tspolicy\fR object_id]
[\fB\-in\fR response.tsr]
[\fB\-token_in\fR]
[\fB\-out\fR response.tsr]
[\fB\-token_out\fR]
[\fB\-text\fR]
[\fB\-engine\fR id]
.PP
\&\fBopenssl\fR \fBts\fR
\&\fB\-verify\fR
[\fB\-data\fR file_to_hash]
[\fB\-digest\fR digest_bytes]
[\fB\-queryfile\fR request.tsq]
[\fB\-in\fR response.tsr]
[\fB\-token_in\fR]
[\fB\-CApath\fR trusted_cert_path]
[\fB\-CAfile\fR trusted_certs.pem]
[\fB\-untrusted\fR cert_file.pem]
[\fIverify options\fR]
.PP
\&\fIverify options:\fR
[\-attime timestamp]
[\-check_ss_sig]
[\-crl_check]
[\-crl_check_all]
[\-explicit_policy]
[\-extended_crl]
[\-ignore_critical]
[\-inhibit_any]
[\-inhibit_map]
[\-issuer_checks]
[\-no_alt_chains]
[\-no_check_time]
[\-partial_chain]
[\-policy arg]
[\-policy_check]
[\-policy_print]
[\-purpose purpose]
[\-suiteB_128]
[\-suiteB_128_only]
[\-suiteB_192]
[\-trusted_first]
[\-use_deltas]
[\-auth_level num]
[\-verify_depth num]
[\-verify_email email]
[\-verify_hostname hostname]
[\-verify_ip ip]
[\-verify_name name]
[\-x509_strict]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBts\fR command is a basic Time Stamping Authority (\s-1TSA\s0) client and server
application as specified in \s-1RFC 3161\s0 (Time-Stamp Protocol, \s-1TSP\s0). A
\&\s-1TSA\s0 can be part of a \s-1PKI\s0 deployment and its role is to provide long
term proof of the existence of a certain datum before a particular
time. Here is a brief description of the protocol:
.IP "1." 4
The \s-1TSA\s0 client computes a one-way hash value for a data file and sends
the hash to the \s-1TSA.\s0
.IP "2." 4
The \s-1TSA\s0 attaches the current date and time to the received hash value,
signs them and sends the timestamp token back to the client. By
creating this token the \s-1TSA\s0 certifies the existence of the original
data file at the time of response generation.
.IP "3." 4
The \s-1TSA\s0 client receives the timestamp token and verifies the
signature on it. It also checks if the token contains the same hash
value that it had sent to the \s-1TSA.\s0
.PP
There is one \s-1DER\s0 encoded protocol data unit defined for transporting
a timestamp request to the \s-1TSA\s0 and one for sending the timestamp response
back to the client. The \fBts\fR command has three main functions:
creating a timestamp request based on a data file,
creating a timestamp response based on a request, verifying if a
response corresponds to a particular request or a data file.
.PP
There is no support for sending the requests/responses automatically
over \s-1HTTP\s0 or \s-1TCP\s0 yet as suggested in \s-1RFC 3161.\s0 The users must send the
requests either by ftp or e\-mail.
.SH "OPTIONS"
.IX Header "OPTIONS"
.SS "Time Stamp Request generation"
.IX Subsection "Time Stamp Request generation"
The \fB\-query\fR switch can be used for creating and printing a timestamp
request with the following options:
.IP "\fB\-rand file...\fR" 4
.IX Item "-rand file..."
A file or files containing random data used to seed the random number
generator.
Multiple files can be specified separated by an OS-dependent character.
The separator is \fB;\fR for MS-Windows, \fB,\fR for OpenVMS, and \fB:\fR for
all others.
.IP "[\fB\-writerand file\fR]" 4
.IX Item "[-writerand file]"
Writes random data to the specified \fIfile\fR upon exit.
This can be used with a subsequent \fB\-rand\fR flag.
.IP "\fB\-config\fR configfile" 4
.IX Item "-config configfile"
The configuration file to use.
Optional; for a description of the default value,
see \*(L"\s-1COMMAND SUMMARY\*(R"\s0 in \fBopenssl\fR\|(1).
.IP "\fB\-data\fR file_to_hash" 4
.IX Item "-data file_to_hash"
The data file for which the timestamp request needs to be
created. stdin is the default if neither the \fB\-data\fR nor the \fB\-digest\fR
parameter is specified. (Optional)
.IP "\fB\-digest\fR digest_bytes" 4
.IX Item "-digest digest_bytes"
It is possible to specify the message imprint explicitly without the data
file. The imprint must be specified in a hexadecimal format, two characters
per byte, the bytes optionally separated by colons (e.g. 1A:F6:01:... or
1AF601...). The number of bytes must match the message digest algorithm
in use. (Optional)
.IP "\fB\-\f(BIdigest\fB\fR" 4
.IX Item "-digest"
The message digest to apply to the data file.
Any digest supported by the OpenSSL \fBdgst\fR command can be used.
The default is \s-1SHA\-1.\s0 (Optional)
.IP "\fB\-tspolicy\fR object_id" 4
.IX Item "-tspolicy object_id"
The policy that the client expects the \s-1TSA\s0 to use for creating the
timestamp token. Either the dotted \s-1OID\s0 notation or \s-1OID\s0 names defined
in the config file can be used. If no policy is requested the \s-1TSA\s0 will
use its own default policy. (Optional)
.IP "\fB\-no_nonce\fR" 4
.IX Item "-no_nonce"
No nonce is specified in the request if this option is
given. Otherwise a 64 bit long pseudo-random none is
included in the request. It is recommended to use nonce to
protect against replay-attacks. (Optional)
.IP "\fB\-cert\fR" 4
.IX Item "-cert"
The \s-1TSA\s0 is expected to include its signing certificate in the
response. (Optional)
.IP "\fB\-in\fR request.tsq" 4
.IX Item "-in request.tsq"
This option specifies a previously created timestamp request in \s-1DER\s0
format that will be printed into the output file. Useful when you need
to examine the content of a request in human-readable
format. (Optional)
.IP "\fB\-out\fR request.tsq" 4
.IX Item "-out request.tsq"
Name of the output file to which the request will be written. Default
is stdout. (Optional)
.IP "\fB\-text\fR" 4
.IX Item "-text"
If this option is specified the output is human-readable text format
instead of \s-1DER.\s0 (Optional)
.SS "Time Stamp Response generation"
.IX Subsection "Time Stamp Response generation"
A timestamp response (TimeStampResp) consists of a response status
and the timestamp token itself (ContentInfo), if the token generation was
successful. The \fB\-reply\fR command is for creating a timestamp
response or timestamp token based on a request and printing the
response/token in human-readable format. If \fB\-token_out\fR is not
specified the output is always a timestamp response (TimeStampResp),
otherwise it is a timestamp token (ContentInfo).
.IP "\fB\-config\fR configfile" 4
.IX Item "-config configfile"
The configuration file to use.
Optional; for a description of the default value,
see \*(L"\s-1COMMAND SUMMARY\*(R"\s0 in \fBopenssl\fR\|(1).
See \fB\s-1CONFIGURATION FILE OPTIONS\s0\fR for configurable variables.
.IP "\fB\-section\fR tsa_section" 4
.IX Item "-section tsa_section"
The name of the config file section containing the settings for the
response generation. If not specified the default \s-1TSA\s0 section is
used, see \fB\s-1CONFIGURATION FILE OPTIONS\s0\fR for details. (Optional)
.IP "\fB\-queryfile\fR request.tsq" 4
.IX Item "-queryfile request.tsq"
The name of the file containing a \s-1DER\s0 encoded timestamp request. (Optional)
.IP "\fB\-passin\fR password_src" 4
.IX Item "-passin password_src"
Specifies the password source for the private key of the \s-1TSA.\s0 See
\&\*(L"Pass Phrase Options\*(R" in \fBopenssl\fR\|(1). (Optional)
.IP "\fB\-signer\fR tsa_cert.pem" 4
.IX Item "-signer tsa_cert.pem"
The signer certificate of the \s-1TSA\s0 in \s-1PEM\s0 format. The \s-1TSA\s0 signing
certificate must have exactly one extended key usage assigned to it:
timeStamping. The extended key usage must also be critical, otherwise
the certificate is going to be refused. Overrides the \fBsigner_cert\fR
variable of the config file. (Optional)
.IP "\fB\-inkey\fR file_or_id" 4
.IX Item "-inkey file_or_id"
The signer private key of the \s-1TSA\s0 in \s-1PEM\s0 format. Overrides the
\&\fBsigner_key\fR config file option. (Optional)
If no engine is used, the argument is taken as a file; if an engine is
specified, the argument is given to the engine as a key identifier.
.IP "\fB\-\f(BIdigest\fB\fR" 4
.IX Item "-digest"
Signing digest to use. Overrides the \fBsigner_digest\fR config file
option. (Mandatory unless specified in the config file)
.IP "\fB\-chain\fR certs_file.pem" 4
.IX Item "-chain certs_file.pem"
The collection of certificates in \s-1PEM\s0 format that will all
be included in the response in addition to the signer certificate if
the \fB\-cert\fR option was used for the request. This file is supposed to
contain the certificate chain for the signer certificate from its
issuer upwards. The \fB\-reply\fR command does not build a certificate
chain automatically. (Optional)
.IP "\fB\-tspolicy\fR object_id" 4
.IX Item "-tspolicy object_id"
The default policy to use for the response unless the client
explicitly requires a particular \s-1TSA\s0 policy. The \s-1OID\s0 can be specified
either in dotted notation or with its name. Overrides the
\&\fBdefault_policy\fR config file option. (Optional)
.IP "\fB\-in\fR response.tsr" 4
.IX Item "-in response.tsr"
Specifies a previously created timestamp response or timestamp token
(if \fB\-token_in\fR is also specified) in \s-1DER\s0 format that will be written
to the output file. This option does not require a request, it is
useful e.g. when you need to examine the content of a response or
token or you want to extract the timestamp token from a response. If
the input is a token and the output is a timestamp response a default
\&'granted' status info is added to the token. (Optional)
.IP "\fB\-token_in\fR" 4
.IX Item "-token_in"
This flag can be used together with the \fB\-in\fR option and indicates
that the input is a \s-1DER\s0 encoded timestamp token (ContentInfo) instead
of a timestamp response (TimeStampResp). (Optional)
.IP "\fB\-out\fR response.tsr" 4
.IX Item "-out response.tsr"
The response is written to this file. The format and content of the
file depends on other options (see \fB\-text\fR, \fB\-token_out\fR). The default is
stdout. (Optional)
.IP "\fB\-token_out\fR" 4
.IX Item "-token_out"
The output is a timestamp token (ContentInfo) instead of timestamp
response (TimeStampResp). (Optional)
.IP "\fB\-text\fR" 4
.IX Item "-text"
If this option is specified the output is human-readable text format
instead of \s-1DER.\s0 (Optional)
.IP "\fB\-engine\fR id" 4
.IX Item "-engine id"
Specifying an engine (by its unique \fBid\fR string) will cause \fBts\fR
to attempt to obtain a functional reference to the specified engine,
thus initialising it if needed. The engine will then be set as the default
for all available algorithms. Default is builtin. (Optional)
.SS "Time Stamp Response verification"
.IX Subsection "Time Stamp Response verification"
The \fB\-verify\fR command is for verifying if a timestamp response or
timestamp token is valid and matches a particular timestamp request or
data file. The \fB\-verify\fR command does not use the configuration file.
.IP "\fB\-data\fR file_to_hash" 4
.IX Item "-data file_to_hash"
The response or token must be verified against file_to_hash. The file
is hashed with the message digest algorithm specified in the token.
The \fB\-digest\fR and \fB\-queryfile\fR options must not be specified with this one.
(Optional)
.IP "\fB\-digest\fR digest_bytes" 4
.IX Item "-digest digest_bytes"
The response or token must be verified against the message digest specified
with this option. The number of bytes must match the message digest algorithm
specified in the token. The \fB\-data\fR and \fB\-queryfile\fR options must not be
specified with this one. (Optional)
.IP "\fB\-queryfile\fR request.tsq" 4
.IX Item "-queryfile request.tsq"
The original timestamp request in \s-1DER\s0 format. The \fB\-data\fR and \fB\-digest\fR
options must not be specified with this one. (Optional)
.IP "\fB\-in\fR response.tsr" 4
.IX Item "-in response.tsr"
The timestamp response that needs to be verified in \s-1DER\s0 format. (Mandatory)
.IP "\fB\-token_in\fR" 4
.IX Item "-token_in"
This flag can be used together with the \fB\-in\fR option and indicates
that the input is a \s-1DER\s0 encoded timestamp token (ContentInfo) instead
of a timestamp response (TimeStampResp). (Optional)
.IP "\fB\-CApath\fR trusted_cert_path" 4
.IX Item "-CApath trusted_cert_path"
The name of the directory containing the trusted \s-1CA\s0 certificates of the
client. See the similar option of \fBverify\fR\|(1) for additional
details. Either this option or \fB\-CAfile\fR must be specified. (Optional)
.IP "\fB\-CAfile\fR trusted_certs.pem" 4
.IX Item "-CAfile trusted_certs.pem"
The name of the file containing a set of trusted self-signed \s-1CA\s0
certificates in \s-1PEM\s0 format. See the similar option of
\&\fBverify\fR\|(1) for additional details. Either this option
or \fB\-CApath\fR must be specified.
(Optional)
.IP "\fB\-untrusted\fR cert_file.pem" 4
.IX Item "-untrusted cert_file.pem"
Set of additional untrusted certificates in \s-1PEM\s0 format which may be
needed when building the certificate chain for the \s-1TSA\s0's signing
certificate. This file must contain the \s-1TSA\s0 signing certificate and
all intermediate \s-1CA\s0 certificates unless the response includes them.
(Optional)
.IP "\fIverify options\fR" 4
.IX Item "verify options"
The options \fB\-attime timestamp\fR, \fB\-check_ss_sig\fR, \fB\-crl_check\fR,
\&\fB\-crl_check_all\fR, \fB\-explicit_policy\fR, \fB\-extended_crl\fR, \fB\-ignore_critical\fR,
\&\fB\-inhibit_any\fR, \fB\-inhibit_map\fR, \fB\-issuer_checks\fR, \fB\-no_alt_chains\fR,
\&\fB\-no_check_time\fR, \fB\-partial_chain\fR, \fB\-policy\fR, \fB\-policy_check\fR,
\&\fB\-policy_print\fR, \fB\-purpose\fR, \fB\-suiteB_128\fR, \fB\-suiteB_128_only\fR,
\&\fB\-suiteB_192\fR, \fB\-trusted_first\fR, \fB\-use_deltas\fR, \fB\-auth_level\fR,
\&\fB\-verify_depth\fR, \fB\-verify_email\fR, \fB\-verify_hostname\fR, \fB\-verify_ip\fR,
\&\fB\-verify_name\fR, and \fB\-x509_strict\fR can be used to control timestamp
verification. See \fBverify\fR\|(1).
.SH "CONFIGURATION FILE OPTIONS"
.IX Header "CONFIGURATION FILE OPTIONS"
The \fB\-query\fR and \fB\-reply\fR commands make use of a configuration file.
See \fBconfig\fR\|(5)
for a general description of the syntax of the config file. The
\&\fB\-query\fR command uses only the symbolic \s-1OID\s0 names section
and it can work without it. However, the \fB\-reply\fR command needs the
config file for its operation.
.PP
When there is a command line switch equivalent of a variable the
switch always overrides the settings in the config file.
.IP "\fBtsa\fR section, \fBdefault_tsa\fR" 4
.IX Item "tsa section, default_tsa"
This is the main section and it specifies the name of another section
that contains all the options for the \fB\-reply\fR command. This default
section can be overridden with the \fB\-section\fR command line switch. (Optional)
.IP "\fBoid_file\fR" 4
.IX Item "oid_file"
See \fBca\fR\|(1) for description. (Optional)
.IP "\fBoid_section\fR" 4
.IX Item "oid_section"
See \fBca\fR\|(1) for description. (Optional)
.IP "\fB\s-1RANDFILE\s0\fR" 4
.IX Item "RANDFILE"
See \fBca\fR\|(1) for description. (Optional)
.IP "\fBserial\fR" 4
.IX Item "serial"
The name of the file containing the hexadecimal serial number of the
last timestamp response created. This number is incremented by 1 for
each response. If the file does not exist at the time of response
generation a new file is created with serial number 1. (Mandatory)
.IP "\fBcrypto_device\fR" 4
.IX Item "crypto_device"
Specifies the OpenSSL engine that will be set as the default for
all available algorithms. The default value is builtin, you can specify
any other engines supported by OpenSSL (e.g. use chil for the NCipher \s-1HSM\s0).
(Optional)
.IP "\fBsigner_cert\fR" 4
.IX Item "signer_cert"
\&\s-1TSA\s0 signing certificate in \s-1PEM\s0 format. The same as the \fB\-signer\fR
command line option. (Optional)
.IP "\fBcerts\fR" 4
.IX Item "certs"
A file containing a set of \s-1PEM\s0 encoded certificates that need to be
included in the response. The same as the \fB\-chain\fR command line
option. (Optional)
.IP "\fBsigner_key\fR" 4
.IX Item "signer_key"
The private key of the \s-1TSA\s0 in \s-1PEM\s0 format. The same as the \fB\-inkey\fR
command line option. (Optional)
.IP "\fBsigner_digest\fR" 4
.IX Item "signer_digest"
Signing digest to use. The same as the
\&\fB\-\f(BIdigest\fB\fR command line option. (Mandatory unless specified on the command
line)
.IP "\fBdefault_policy\fR" 4
.IX Item "default_policy"
The default policy to use when the request does not mandate any
policy. The same as the \fB\-tspolicy\fR command line option. (Optional)
.IP "\fBother_policies\fR" 4
.IX Item "other_policies"
Comma separated list of policies that are also acceptable by the \s-1TSA\s0
and used only if the request explicitly specifies one of them. (Optional)
.IP "\fBdigests\fR" 4
.IX Item "digests"
The list of message digest algorithms that the \s-1TSA\s0 accepts. At least
one algorithm must be specified. (Mandatory)
.IP "\fBaccuracy\fR" 4
.IX Item "accuracy"
The accuracy of the time source of the \s-1TSA\s0 in seconds, milliseconds
and microseconds. E.g. secs:1, millisecs:500, microsecs:100. If any of
the components is missing zero is assumed for that field. (Optional)
.IP "\fBclock_precision_digits\fR" 4
.IX Item "clock_precision_digits"
Specifies the maximum number of digits, which represent the fraction of
seconds, that need to be included in the time field. The trailing zeros
must be removed from the time, so there might actually be fewer digits,
or no fraction of seconds at all. Supported only on \s-1UNIX\s0 platforms.
The maximum value is 6, default is 0.
(Optional)
.IP "\fBordering\fR" 4
.IX Item "ordering"
If this option is yes the responses generated by this \s-1TSA\s0 can always
be ordered, even if the time difference between two responses is less
than the sum of their accuracies. Default is no. (Optional)
.IP "\fBtsa_name\fR" 4
.IX Item "tsa_name"
Set this option to yes if the subject name of the \s-1TSA\s0 must be included in
the \s-1TSA\s0 name field of the response. Default is no. (Optional)
.IP "\fBess_cert_id_chain\fR" 4
.IX Item "ess_cert_id_chain"
The SignedData objects created by the \s-1TSA\s0 always contain the
certificate identifier of the signing certificate in a signed
attribute (see \s-1RFC 2634,\s0 Enhanced Security Services). If this option
is set to yes and either the \fBcerts\fR variable or the \fB\-chain\fR option
is specified then the certificate identifiers of the chain will also
be included in the SigningCertificate signed attribute. If this
variable is set to no, only the signing certificate identifier is
included. Default is no. (Optional)
.IP "\fBess_cert_id_alg\fR" 4
.IX Item "ess_cert_id_alg"
This option specifies the hash function to be used to calculate the \s-1TSA\s0's
public key certificate identifier. Default is sha1. (Optional)
.SH "EXAMPLES"
.IX Header "EXAMPLES"
All the examples below presume that \fB\s-1OPENSSL_CONF\s0\fR is set to a proper
configuration file, e.g. the example configuration file
openssl/apps/openssl.cnf will do.
.SS "Time Stamp Request"
.IX Subsection "Time Stamp Request"
To create a timestamp request for design1.txt with \s-1SHA\-1\s0
without nonce and policy and no certificate is required in the response:
.PP
.Vb 2
\& openssl ts \-query \-data design1.txt \-no_nonce \e
\& \-out design1.tsq
.Ve
.PP
To create a similar timestamp request with specifying the message imprint
explicitly:
.PP
.Vb 2
\& openssl ts \-query \-digest b7e5d3f93198b38379852f2c04e78d73abdd0f4b \e
\& \-no_nonce \-out design1.tsq
.Ve
.PP
To print the content of the previous request in human readable format:
.PP
.Vb 1
\& openssl ts \-query \-in design1.tsq \-text
.Ve
.PP
To create a timestamp request which includes the \s-1MD\-5\s0 digest
of design2.txt, requests the signer certificate and nonce,
specifies a policy id (assuming the tsa_policy1 name is defined in the
\&\s-1OID\s0 section of the config file):
.PP
.Vb 2
\& openssl ts \-query \-data design2.txt \-md5 \e
\& \-tspolicy tsa_policy1 \-cert \-out design2.tsq
.Ve
.SS "Time Stamp Response"
.IX Subsection "Time Stamp Response"
Before generating a response a signing certificate must be created for
the \s-1TSA\s0 that contains the \fBtimeStamping\fR critical extended key usage extension
without any other key usage extensions. You can add this line to the
user certificate section of the config file to generate a proper certificate;
.PP
.Vb 1
\& extendedKeyUsage = critical,timeStamping
.Ve
.PP
See \fBreq\fR\|(1), \fBca\fR\|(1), and \fBx509\fR\|(1) for instructions. The examples
below assume that cacert.pem contains the certificate of the \s-1CA,\s0
tsacert.pem is the signing certificate issued by cacert.pem and
tsakey.pem is the private key of the \s-1TSA.\s0
.PP
To create a timestamp response for a request:
.PP
.Vb 2
\& openssl ts \-reply \-queryfile design1.tsq \-inkey tsakey.pem \e
\& \-signer tsacert.pem \-out design1.tsr
.Ve
.PP
If you want to use the settings in the config file you could just write:
.PP
.Vb 1
\& openssl ts \-reply \-queryfile design1.tsq \-out design1.tsr
.Ve
.PP
To print a timestamp reply to stdout in human readable format:
.PP
.Vb 1
\& openssl ts \-reply \-in design1.tsr \-text
.Ve
.PP
To create a timestamp token instead of timestamp response:
.PP
.Vb 1
\& openssl ts \-reply \-queryfile design1.tsq \-out design1_token.der \-token_out
.Ve
.PP
To print a timestamp token to stdout in human readable format:
.PP
.Vb 1
\& openssl ts \-reply \-in design1_token.der \-token_in \-text \-token_out
.Ve
.PP
To extract the timestamp token from a response:
.PP
.Vb 1
\& openssl ts \-reply \-in design1.tsr \-out design1_token.der \-token_out
.Ve
.PP
To add 'granted' status info to a timestamp token thereby creating a
valid response:
.PP
.Vb 1
\& openssl ts \-reply \-in design1_token.der \-token_in \-out design1.tsr
.Ve
.SS "Time Stamp Verification"
.IX Subsection "Time Stamp Verification"
To verify a timestamp reply against a request:
.PP
.Vb 2
\& openssl ts \-verify \-queryfile design1.tsq \-in design1.tsr \e
\& \-CAfile cacert.pem \-untrusted tsacert.pem
.Ve
.PP
To verify a timestamp reply that includes the certificate chain:
.PP
.Vb 2
\& openssl ts \-verify \-queryfile design2.tsq \-in design2.tsr \e
\& \-CAfile cacert.pem
.Ve
.PP
To verify a timestamp token against the original data file:
openssl ts \-verify \-data design2.txt \-in design2.tsr \e
\-CAfile cacert.pem
.PP
To verify a timestamp token against a message imprint:
openssl ts \-verify \-digest b7e5d3f93198b38379852f2c04e78d73abdd0f4b \e
\-in design2.tsr \-CAfile cacert.pem
.PP
You could also look at the 'test' directory for more examples.
.SH "BUGS"
.IX Header "BUGS"
.IP "\(bu" 2
No support for timestamps over \s-1SMTP,\s0 though it is quite easy
to implement an automatic e\-mail based \s-1TSA\s0 with \fBprocmail\fR\|(1)
and \fBperl\fR\|(1). \s-1HTTP\s0 server support is provided in the form of
a separate apache module. \s-1HTTP\s0 client support is provided by
\&\fBtsget\fR\|(1). Pure \s-1TCP/IP\s0 protocol is not supported.
.IP "\(bu" 2
The file containing the last serial number of the \s-1TSA\s0 is not
locked when being read or written. This is a problem if more than one
instance of \fBopenssl\fR\|(1) is trying to create a timestamp
response at the same time. This is not an issue when using the apache
server module, it does proper locking.
.IP "\(bu" 2
Look for the \s-1FIXME\s0 word in the source files.
.IP "\(bu" 2
The source code should really be reviewed by somebody else, too.
.IP "\(bu" 2
More testing is needed, I have done only some basic tests (see
test/testtsa).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBtsget\fR\|(1), \fBopenssl\fR\|(1), \fBreq\fR\|(1),
\&\fBx509\fR\|(1), \fBca\fR\|(1), \fBgenrsa\fR\|(1),
\&\fBconfig\fR\|(5)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2006\-2021 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use
this file except in compliance with the License. You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.