curl --location --request POST 'http://convertpdf.l2.bb1a.cn/api/v1/security/validate-signature' \
--form 'fileInput=@""'
[
{
"valid": true,
"signerName": "string",
"signatureDate": "string",
"reason": "string",
"location": "string",
"errorMessage": "string",
"chainValid": true,
"trustValid": true,
"notExpired": true,
"notRevoked": true,
"issuerDN": "string",
"subjectDN": "string",
"serialNumber": "string",
"validFrom": "string",
"validUntil": "string",
"signatureAlgorithm": "string",
"keySize": 0,
"version": "string",
"keyUsages": [
"string"
],
"selfSigned": true
}
]