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[#26] object: Replace PayloadChecksum to Integrity

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This commit replaces PayloadChecksum field from ExtendedHeader to
IntegrityHeader for assembling all verification data in one structure.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich 2020-08-04 18:48:15 +03:00 • committed by Stanislav Bogatyrev
parent b77811716e
commit fb2064803e
2 changed files with 16 additions and 8 deletions
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20
object/types.proto
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@ -27,8 +27,6 @@ message ExtendedHeader {
service.Token Token = 6;
// HomoHash is a homomorphic hash of original object payload
bytes HomoHash = 7;
// PayloadChecksum of actual object's payload
bytes PayloadChecksum = 8;
// Integrity header with checksum of all above headers in the object
IntegrityHeader Integrity = 9;
// StorageGroup contains meta information for the data audit
@ -50,12 +48,22 @@ message SystemHeader {
}
message IntegrityHeader {
// HeadersChecksum is a checksum of all above headers in the object
bytes HeadersChecksum = 1;
// PayloadChecksum carries the checksum of object payload bytes.
// Changing any byte of the payload changes the checksum.
// It is calculated as a SHA-256 hash over payload bytes.
bytes PayloadChecksum = 1;
// HeaderChecksum carries checksum of the object header structure.
// It covers all object attributes. Changing any field of the object except
// CreatorKey and ChecksumSignature changes the checksum.
// PayloadChecksum and HeaderChecksum cannot be merged due to the need
// to verify the header in the absence of a payload (e.g. in object.Head rpc).
// It is calculated as a SHA-256 hash over marshaled object header
// with cut CreatorKey and ChecksumSignature.
bytes HeaderChecksum = 2;
// CreatorKey carries public key of the object creator in a binary format.
bytes CreatorKey = 2;
bytes CreatorKey = 3;
// ChecksumSignature is an user's signature of checksum to verify if it is correct
bytes ChecksumSignature = 3;
bytes ChecksumSignature = 4;
}
// SplitHeader groups information about spawning the object through a payload splitting.