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57 lines
2.8 KiB
Markdown
57 lines
2.8 KiB
Markdown
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> OTS uses two different formats to store secrets under the hood. Both of them can be read and written by the frontend implementation as well as by the `ots-cli` application.
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## Simple Format
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The simple format is the format used by OTS since day one and is the, well, most simple one. It only consists of the secret encrypted using OpenSSL AES-256-CBC compatible encryption. This format is preferred for backwards compatibility when no other reasons require the use of the OTS-Meta format.
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```console
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# openssl enc -aes-256-cbc -pbkdf2 -md sha512 -iter 300000 -pass pass:12345678 -a -A <<<"I'm a secret"
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U2FsdGVkX19G3GuIw3LGM0PVQmavPU/LnWvJhcLeYvs=
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# curl -H 'Content-Type: application/json' -d '{"secret": "U2FsdGVkX19G3GuIw3LGM0PVQmavPU/LnWvJhcLeYvs="}' https://ots.fyi/api/create
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{"success":true,"expires_at":"2023-10-11T19:45:01.315587714Z","secret_id":"bbd53ec5-8ee9-4df5-a630-9561313a348a"}
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# ots-cli fetch "https://ots.fyi/#bbd53ec5-8ee9-4df5-a630-9561313a348a%7C12345678"
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INFO[0000] fetching secret...
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I'm a secret
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```
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## OTSMeta Format
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The OTSMeta format was first introduced in `v1.9.0` of OTS together with the possibility to attach files to the secret. It contains structured data with a banner to differentiate between a simple JSON shared through OTS and the OTSMeta format. The OTSMeta structure itself is a simple JSON document containing a secret and a number of attachments having their contents base64 encoded:
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```json
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{
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"secret": "I'm a secret",
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"attachments": [
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{
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"name": "file.txt",
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"type": "text/plain",
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"data": "SSdtIGZpbGUgY29udGVudAo="
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}
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]
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}
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```
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This structure is prefixed with the Banner `OTSMeta` and then shared the same way as a simple secret would be:
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```console
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# ots-cli create -f file.txt <<<"I'm a secret"
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INFO[0000] reading secret content...
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INFO[0000] attaching file... file=file.txt
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INFO[0000] creating the secret...
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INFO[0000] secret created, see URL below expires-at="2023-10-11 19:52:30.816059504 +0000 UTC"
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https://ots.fyi/#6a6be08c-97d7-4970-a202-5bb6964460d8%7CwNUURZ0LRrQAhaczdZfj
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# curl -sS https://ots.fyi/api/get/6a6be08c-97d7-4970-a202-5bb6964460d8 | jq -r .secret >/tmp/secret.bin
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# openssl enc -aes-256-cbc -pbkdf2 -md sha512 -iter 300000 -pass pass:wNUURZ0LRrQAhaczdZfj -a -A -d </tmp/secret.bin
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OTSMeta{"secret":"I'm a secret\n","attachments":[{"name":"file.txt","type":"text/plain; charset=utf-8","data":"SSdtIGZpbGUgY29udGVudAo="}]}
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```
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Of course it's also possible to share a simple secret in OTSMeta format but the recommended way would be to omit the OTSMeta wrapping:
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```
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OTSMeta{"secret":"I'm a secret"}
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```
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When programmatically reading secrets you therefore need to check whether the secret starts with `OTSMeta` and decode the remaining as a JSON document and if it does not just use all the content as the secret.
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