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Sets the file path for the CA certificate in PEM format.

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
CURL 2.5 Yes Yes Yes Yes Yes

MBS( "CURL.SetOptionIssuerCert"; Handle; Value { ; Encoding } )


Parameter Description Example value
Handle The CURL session handle. $curl
Value The CA certificate file path. "/tmp/cert.pem"
Encoding Optional
The text encoding for text parameter.
Default is UTF-8.
Possible encoding names: ANSI, Arabic-Mac, Arabic-Win, Baltic-Win, CentralEurope-Mac, ChineseSimp-Mac, ChineseSimp-Win, ChineseTrad-Mac, ChineseTrad-Win, Cyrillic-Mac, Cyrillic-Win, EasternEurope-Win, Greek-Mac, Greek-Win, Hebrew-Mac, Hebrew-Win, ISO-8859-1, ISO-8859-2, ISO-8859-3, ISO-8859-4, ISO-8859-5, ISO-8859-6, ISO-8859-7, ISO-8859-8, ISO-8859-9, ISO-8859-15, Korean-Johab, Korean-Mac, Korean-Win, Latin1, Mac, Native, ShiftJIS-Mac, ShiftJIS-Win, Turkish-Mac, Turkish-Win, UTF-8, DOS or Windows. Pass native to use the native encoding of the current platform.


Returns "OK" on success.


Sets the file path for the CA certificate in PEM format.
If the option is set, an additional check against the peer certificate is performed to verify the issuer is indeed the one associated with the certificate provided by the option. This additional check is useful in multi-level PKI where one needs to enforce that the peer certificate is from a specific branch of the tree.

This option makes sense only when used in combination with the CURL.SetOptionSSLVerifyPeer option. Otherwise, the result of the check is not considered as failure.

A specific error code (CURLE_SSL_ISSUER_ERROR) is defined with the option, which is returned if the setup of the SSL/TLS session has failed due to a mismatch with the issuer of peer certificate (CURL.SetOptionSSLVerifyPeer has to be set too for the check to fail).

See also

CURL.SetOptionInterface   -   CURL.SetOptionKRBLevel

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