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Overview of the bupstash key format.

Bupstash key files are PEM encoded with one of the following tags:

○
BUPSTASH KEY
○
BUPSTASH SUB KEY

The binary data after decoding the PEM data consists of bare https://baremessages.org/ key structures, described below.

Binary encoding of keys:

```

type PrimaryKey { id: Data16, rollsum_key: Data32, data_hash_key_part_1: Data32, data_hash_key_part_2: Data32, data_pk: Data32, data_sk: Data32, data_psk: Data32, idx_hash_key_part_1: Data32, idx_hash_key_part_2: Data32, idx_pk: Data32, idx_sk: Data32, idx_psk: Data32, metadata_pk: Data32, metadata_sk: Data32, metadata_psk: Data32, }

type SubKey { id: Data16, primary_key_id: Data16, rollsum_key: OptionData<32>, data_hash_key_part_1: OptionData<32>, data_hash_key_part_2: OptionData<32>, data_pk: OptionData<32>, data_sk: OptionData<32>, data_psk: OptionData<32>, idx_hash_key_part_1: OptionData<32>, idx_hash_key_part_2: OptionData<32>, idx_pk: OptionData<32>, idx_sk: OptionData<32>, idx_psk: OptionData<32>, metadata_pk: OptionData<32>, metadata_sk: OptionData<32>, metadata_psk: OptionData<32>, }

type Key (PrimaryKey | SubKey) `````` $ bupstash new-key -o bupstash.key $ cat bupstash.key # This file contains a cryptographic key used by ´bupstash´ to encrypt and decrypt data. # # key-id=55f32e9db43a1fa3cf65bb3705230898

----BEGIN BUPSTASH KEY---- AFXzLp20Oh+jz2W7NwUjCJgS7VhqV37771UhSRo7LZUIxJCbEZkm27AcYylSL5T2 bxAE4g0rukxRhloPqWT+s1Yr2cPNEHymMzJzm+V4QiDMzE4K4k548bsrMoQMGXc8 LRpNiqVzwRRvibkdf9RdnyYPQ5IlvQN395YJVCfiD6nEOY90plDH20UgiGiNLRYK xH+MfIoFA1X59UFdto0B/CJW9R98OgQeJNP91NQloFA17mbzhqUvwnHDjatzkxht CJWScQm6PTwEFEYRSzLTWgpFXjnpF09quzZenw/jEn6nPAyjb11u+Ohe7pkfxacv QZ5qhBMqJ7+H3VpvOLW7mTmXL3T6gB5W7u2Lg6Y/AwkE ----END BUPSTASH KEY----

```

bupstash(1)