Using jq search value using regex - json

Question

I have this json object and I am trying to find a way to use regex in jq to search value in issuer_dn that is more than 8 characters. A regex like [A-Z]{8} should work but I am unable to get results. I am still learning jq and if there is any other tool that can be used then please share.
{
"ip": "127.0.0.1",
"data": {
"tls": {
"status": "success",
"protocol": "tls",
"result": {
"handshake_log": {
"server_hello": {
"version": {
"name": "TLSv1.2",
"value": 771
},
"random": "hhdshfhhdhfhshdh",
"session_id": "hjdsfyyueujhfjaskdfjjl",
"cipher_suite": {
"hex": "0xC014",
"name": "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
"value": 49172
},
"compression_method": 0,
"ocsp_stapling": false,
"ticket": false,
"secure_renegotiation": true,
"heartbeat": false,
"extended_master_secret": false
},
"server_certificates": {
"certificate": {
"raw": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC==",
"parsed": {
"version": 3,
"serial_number": "1234567890",
"signature_algorithm": {
"name": "SHA256-RSA",
"oid": "1.2.840.113549.1.1.11"
},
"issuer": {
"common_name": [
"ABC"
],
"country": [
"ABC"
],
"locality": [
"ABC"
],
"province": [
"ABC"
],
"organization": [
"ABC"
],
"organizational_unit": [
"ABC"
]
},
"issuer_dn": "C=ABCD, ST=ABCD, L=ABCD, O=ABCD, OU=ABCD, CN=ABCD",
"validity": {
"start": "2020-02-01T01:09:22Z",
"end": "2021-02-01T03:09:22Z",
"length": 7883663
},
"subject": {
"common_name": [
"ABC"
],
"country": [
"ABC"
],
"locality": [
"ABC"
],
"province": [
"ABC"
],
"organization": [
"ABC"
],
"organizational_unit": [
"ABC"
]
},
"subject_dn": "C=ABCD, ST=ABCD, L=ABCD, O=ABCD, OU=ABCD, CN=ABCD",
"subject_key_info": {
"key_algorithm": {
"name": "RSA"
},
"rsa_public_key": {
"exponent": 65537,
"modulus": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC",
"length": 2048
},
"fingerprint_sha256": "73hh3g39920jfjj38723bb3993hh3774994002"
},
"extensions": {
"basic_constraints": {
"is_ca": true
},
"authority_key_id": "73hh3g39920jfjj38723bb3993hh3774994002",
"subject_key_id": "73hh3g39920jfjj38723bb3993hh3774994002"
},
"signature": {
"signature_algorithm": {
"name": "SHA256-RSA",
"oid": "1.2.840.113549.1.1.11"
},
"value": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC",
"valid": true,
"self_signed": true
},
"fingerprint_md5": "73hh3g39920jfjj38723bb3993hh3774994002",
"fingerprint_sha1": "73hh3g39920jfjj38723bb3993hh3774994002",
"fingerprint_sha256": "73hh3g39920jfjj38723bb3993hh3774994002",
"tbs_noct_fingerprint": "73hh3g39920jfjj38723bb3993hh3774994002",
"spki_subject_fingerprint": "73hh3g39920jfjj38723bb3993hh3774994002",
"tbs_fingerprint": "73hh3g39920jfjj38723bb3993hh3774994002",
"validation_level": "73hh3g39920jfjj38723bb3993hh3774994002",
"redacted": false
}
},
"validation": {
"browser_trusted": false,
"browser_error": "x509: failed to load system roots and no roots provided"
}
},
"server_key_exchange": {
"ecdh_params": {
"curve_id": {
"name": "secp256r1",
"id": 23
},
"server_public": {
"x": {
"value": "73hh3g39920jfjj38723bb3993hh3774994002",
"length": 256
},
"y": {
"value": "73hh3g39920jfjj38723bb3993hh3774994002",
"length": 256
}
}
},
"digest": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC",
"signature": {
"raw": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC",
"type": "rsa",
"valid": true,
"signature_and_hash_type": {
"signature_algorithm": "rsa",
"hash_algorithm": "sha256"
},
"tls_version": {
"name": "TLSv1.2",
"value": 771
}
}
},
"client_key_exchange": {
"ecdh_params": {
"curve_id": {
"name": "secp256r1",
"id": 23
},
"client_public": {
"x": {
"value": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC=",
"length": 256
},
"y": {
"value": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC=",
"length": 256
}
},
"client_private": {
"value": "dGVzdCBkYXRhIGFuZCBnYXJiYWdldGVzdC=",
"length": 32
}
}
},
"client_finished": {
"verify_data": "dGVzdCBkY"
},
"server_finished": {
"verify_data": "dGVzdCBkY"
},
"key_material": {
"master_secret": {
"value": "dGVzdCBkY",
"length": 48
},
"pre_master_secret": {
"value": "dGVzdCBkY",
"length": 32
}
}
}
},
"timestamp": "2020-02-9T07:14:47Z"
}
}
}

Answer 1

I would use the following :
.data.tls.result.handshake_log.server_certificates.certificate.parsed.issuer_dn \
| select(length > 8)
You can try it here.

Answer 2

You could use:
test("[A-Z]{8}")