frostfs-sdk-go/client/object_hash.go

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package client
import (
"context"
"crypto/ecdsa"
"fmt"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/acl"
v2object "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
v2refs "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
rpcapi "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
v2session "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/session"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/bearer"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/checksum"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
cid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session"
)
// PrmObjectHash groups parameters of ObjectHash operation.
type PrmObjectHash struct {
XHeaders []string
BearerToken *bearer.Token
Session *session.Object
Local bool
Ranges []object.Range
Salt []byte
ChecksumType checksum.Type
ContainerID *cid.ID
ObjectID *oid.ID
Key *ecdsa.PrivateKey
}
// UseKey specifies private key to sign the requests.
// If key is not provided, then Client default key is used.
//
// Deprecated: Use PrmObjectHash.Key instead.
func (prm *PrmObjectHash) UseKey(key ecdsa.PrivateKey) {
prm.Key = &key
}
// TillichZemorAlgo changes the hash function to Tillich-Zemor
// (https://link.springer.com/content/pdf/10.1007/3-540-48658-5_5.pdf).
//
// By default, SHA256 hash function is used/.
//
// Deprecated: Use PrmObjectHash.ChecksumType instead.
func (prm *PrmObjectHash) TillichZemorAlgo() {
prm.ChecksumType = checksum.TZ
}
// ResObjectHash groups resulting values of ObjectHash operation.
type ResObjectHash struct {
statusRes
checksums [][]byte
}
// Checksums returns a list of calculated checksums in range order.
func (x ResObjectHash) Checksums() [][]byte {
return x.checksums
}
func (prm *PrmObjectHash) buildRequest(c *Client) (*v2object.GetRangeHashRequest, error) {
if prm.ContainerID == nil {
return nil, errorMissingContainer
}
if prm.ObjectID == nil {
return nil, errorMissingObject
}
if len(prm.XHeaders)%2 != 0 {
return nil, errorInvalidXHeaders
}
if len(prm.Ranges) == 0 {
return nil, errorMissingRanges
}
meta := new(v2session.RequestMetaHeader)
writeXHeadersToMeta(prm.XHeaders, meta)
if prm.BearerToken != nil {
v2BearerToken := new(acl.BearerToken)
prm.BearerToken.WriteToV2(v2BearerToken)
meta.SetBearerToken(v2BearerToken)
}
if prm.Session != nil {
v2SessionToken := new(v2session.Token)
prm.Session.WriteToV2(v2SessionToken)
meta.SetSessionToken(v2SessionToken)
}
if prm.Local {
meta.SetTTL(1)
}
addr := new(v2refs.Address)
cnrV2 := new(v2refs.ContainerID)
prm.ContainerID.WriteToV2(cnrV2)
addr.SetContainerID(cnrV2)
objV2 := new(v2refs.ObjectID)
prm.ObjectID.WriteToV2(objV2)
addr.SetObjectID(objV2)
rs := make([]v2object.Range, len(prm.Ranges))
for i := range prm.Ranges {
rs[i].SetOffset(prm.Ranges[i].GetOffset())
rs[i].SetLength(prm.Ranges[i].GetLength())
}
body := new(v2object.GetRangeHashRequestBody)
body.SetAddress(addr)
body.SetRanges(rs)
body.SetSalt(prm.Salt)
if prm.ChecksumType == checksum.Unknown {
body.SetType(v2refs.SHA256)
} else {
body.SetType(v2refs.ChecksumType(prm.ChecksumType))
}
req := new(v2object.GetRangeHashRequest)
req.SetBody(body)
c.prepareRequest(req, meta)
return req, nil
}
// ObjectHash requests checksum of the range list of the object payload using
// FrostFS API protocol.
//
// Returns a list of checksums in raw form: the format of hashes and their number
// is left for the caller to check. Client preserves the order of the server's response.
//
// Exactly one return value is non-nil. By default, server status is returned in res structure.
// Any client's internal or transport errors are returned as `error`,
// If PrmInit.DisableFrostFSFailuresResolution has been called, unsuccessful
// FrostFS status codes are included in the returned result structure,
// otherwise, are also returned as `error`.
//
// Returns an error if parameters are set incorrectly (see PrmObjectHash docs).
// Context is required and must not be nil. It is used for network communication.
//
// Return statuses:
// - global (see Client docs);
// - *apistatus.ContainerNotFound;
// - *apistatus.ObjectNotFound;
// - *apistatus.ObjectAccessDenied;
// - *apistatus.ObjectOutOfRange;
// - *apistatus.SessionTokenExpired.
func (c *Client) ObjectHash(ctx context.Context, prm PrmObjectHash) (*ResObjectHash, error) {
req, err := prm.buildRequest(c)
if err != nil {
return nil, err
}
key := c.prm.Key
if prm.Key != nil {
key = *prm.Key
}
err = signature.SignServiceMessage(&key, req)
if err != nil {
return nil, fmt.Errorf("sign request: %w", err)
}
resp, err := rpcapi.HashObjectRange(&c.c, req, client.WithContext(ctx))
if err != nil {
return nil, fmt.Errorf("write request: %w", err)
}
var res ResObjectHash
res.st, err = c.processResponse(resp)
if err != nil {
return nil, err
}
if !apistatus.IsSuccessful(res.st) {
return &res, nil
}
res.checksums = resp.GetBody().GetHashList()
if len(res.checksums) == 0 {
return nil, newErrMissingResponseField("hash list")
}
return &res, nil
}