Our asn1_print, like OpenSSL's, just knows how to parse and dump DER.
Ours can attempt to decode OCTET STRING and IMPLICIT-tagged constructed
values as DER, which is very useful.
But _now_ it's even better. Now it knows about all types exported from
all ASN.1 modules in `lib/asn1/` in Heimdal, and if told to print as
some type, it will use the new printing interface to print JSON-like
representations of values:
```
$ ./asn1_print /tmp/t490/ek2.crt Certificate |
jq '.tbsCertificate.extensions[3]._extnValue[]._values'
[
{
"_type": "TPMSpecification",
"family": "2.0",
"level": "0",
"revision": "138"
}
]
[
{
"_type": "TPMSecurityAssertions",
"version": "0",
"fieldUpgradable": true,
"ekGenerationType": "655617",
"ekGenerationLocation": "655616",
"ekCertificateGenerationLocation": "655616",
"ccInfo": {
"_type": "CommonCriteriaMeasures",
"version": "3.1",
"assurancelevel": "4",
"evaluationStatus": "2",
"plus": true,
"strengthOfFunction": null,
"profileOid": null,
"profileUri": null,
"targetOid": null,
"targetUri": null
},
"fipsLevel": {
"_type": "FIPSLevel",
"version": "140-2",
"level": "2",
"plus": false
},
"iso9000Certified": false,
"iso9000Uri": null
}
]
```
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