allow disabling sha256 completely for PUT requests

api-put-object-multipart.go

@@ -104,7 +104,7 @@ func (c *Client) putObjectMultipartNoStream(ctx context.Context, bucketName, obj
 		// Choose hash algorithms to be calculated by hashCopyN,
 		// avoid sha256 with non-v4 signature request or
 		// HTTPS connection.
-		hashAlgos, hashSums := c.hashMaterials(opts.SendContentMd5)
+		hashAlgos, hashSums := c.hashMaterials(opts.SendContentMd5, !opts.DisableContentSha256)
 
 		length, rErr := readFull(reader, buf)
 		if rErr == io.EOF && partNumber > 1 {
@@ -140,7 +140,9 @@ func (c *Client) putObjectMultipartNoStream(ctx context.Context, bucketName, obj
 
 		// Proceed to upload the part.
 		objPart, uerr := c.uploadPart(ctx, bucketName, objectName, uploadID, rd, partNumber,
-			md5Base64, sha256Hex, int64(length), opts.ServerSideEncryption)
+			md5Base64, sha256Hex, int64(length),
+			opts.ServerSideEncryption,
+			!opts.DisableContentSha256)
 		if uerr != nil {
 			return UploadInfo{}, uerr
 		}
@@ -241,7 +243,7 @@ func (c *Client) initiateMultipartUpload(ctx context.Context, bucketName, object
 
 // uploadPart - Uploads a part in a multipart upload.
 func (c *Client) uploadPart(ctx context.Context, bucketName, objectName, uploadID string, reader io.Reader,
-	partNumber int, md5Base64, sha256Hex string, size int64, sse encrypt.ServerSide,
+	partNumber int, md5Base64, sha256Hex string, size int64, sse encrypt.ServerSide, streamSha256 bool,
 ) (ObjectPart, error) {
 	// Input validation.
 	if err := s3utils.CheckValidBucketName(bucketName); err != nil {
@@ -289,6 +291,7 @@ func (c *Client) uploadPart(ctx context.Context, bucketName, objectName, uploadI
 		contentLength:    size,
 		contentMD5Base64: md5Base64,
 		contentSHA256Hex: sha256Hex,
+		streamSha256:     streamSha256,
 	}
 
 	// Execute PUT on each part.

api-put-object-streaming.go

@@ -186,7 +186,10 @@ func (c *Client) putObjectMultipartStreamFromReadAt(ctx context.Context, bucketN
 				// Proceed to upload the part.
 				objPart, err := c.uploadPart(ctx, bucketName, objectName,
 					uploadID, hookReader, uploadReq.PartNum,
-					"", "", partSize, opts.ServerSideEncryption)
+					"", "", partSize,
+					opts.ServerSideEncryption,
+					!opts.DisableContentSha256,
+				)
 				if err != nil {
 					uploadedPartsCh <- uploadedPartRes{
 						Error: err,
@@ -322,7 +325,10 @@ func (c *Client) putObjectMultipartStreamOptionalChecksum(ctx context.Context, b
 
 		objPart, uerr := c.uploadPart(ctx, bucketName, objectName, uploadID,
 			io.LimitReader(hookReader, partSize),
-			partNumber, md5Base64, "", partSize, opts.ServerSideEncryption)
+			partNumber, md5Base64, "", partSize,
+			opts.ServerSideEncryption,
+			!opts.DisableContentSha256,
+		)
 		if uerr != nil {
 			return UploadInfo{}, uerr
 		}
@@ -452,6 +458,7 @@ func (c *Client) putObjectDo(ctx context.Context, bucketName, objectName string,
 		contentLength:    size,
 		contentMD5Base64: md5Base64,
 		contentSHA256Hex: sha256Hex,
+		streamSha256:     !opts.DisableContentSha256,
 	}
 	if opts.Internal.SourceVersionID != "" {
 		if opts.Internal.SourceVersionID != nullVersionID {

api-put-object.go

@@ -84,6 +84,7 @@ type PutObjectOptions struct {
 	PartSize                uint64
 	LegalHold               LegalHoldStatus
 	SendContentMd5          bool
+	DisableContentSha256    bool
 	DisableMultipart        bool
 	Internal                AdvancedPutOptions
 }
@@ -344,7 +345,10 @@ func (c *Client) putObjectMultipartStreamNoLength(ctx context.Context, bucketNam
 
 		// Proceed to upload the part.
 		objPart, uerr := c.uploadPart(ctx, bucketName, objectName, uploadID, rd, partNumber,
-			md5Base64, "", int64(length), opts.ServerSideEncryption)
+			md5Base64, "", int64(length),
+			opts.ServerSideEncryption,
+			!opts.DisableContentSha256,
+		)
 		if uerr != nil {
 			return UploadInfo{}, uerr
 		}

api.go

@@ -315,14 +315,16 @@ func (c *Client) SetS3TransferAccelerate(accelerateEndpoint string) {
 //  - For signature v4 request if the connection is insecure compute only sha256.
 //  - For signature v4 request if the connection is secure compute only md5.
 //  - For anonymous request compute md5.
-func (c *Client) hashMaterials(isMd5Requested bool) (hashAlgos map[string]md5simd.Hasher, hashSums map[string][]byte) {
+func (c *Client) hashMaterials(isMd5Requested, isSha256Requested bool) (hashAlgos map[string]md5simd.Hasher, hashSums map[string][]byte) {
 	hashSums = make(map[string][]byte)
 	hashAlgos = make(map[string]md5simd.Hasher)
 	if c.overrideSignerType.IsV4() {
 		if c.secure {
 			hashAlgos["md5"] = c.md5Hasher()
 		} else {
-			hashAlgos["sha256"] = c.sha256Hasher()
+			if isSha256Requested {
+				hashAlgos["sha256"] = c.sha256Hasher()
+			}
 		}
 	} else {
 		if c.overrideSignerType.IsAnonymous() {
@@ -417,6 +419,7 @@ type requestMetadata struct {
 	contentLength    int64
 	contentMD5Base64 string // carries base64 encoded md5sum
 	contentSHA256Hex string // carries hex encoded sha256sum
+	streamSha256     bool
 }
 
 // dumpHTTP - dump HTTP request and response.
@@ -812,7 +815,7 @@ func (c *Client) newRequest(ctx context.Context, method string, metadata request
 	case signerType.IsV2():
 		// Add signature version '2' authorization header.
 		req = signer.SignV2(*req, accessKeyID, secretAccessKey, isVirtualHost)
-	case metadata.objectName != "" && metadata.queryValues == nil && method == http.MethodPut && metadata.customHeader.Get("X-Amz-Copy-Source") == "" && !c.secure:
+	case metadata.streamSha256 && !c.secure:
 		// Streaming signature is used by default for a PUT object request. Additionally we also
 		// look if the initialized client is secure, if yes then we don't need to perform
 		// streaming signature.

core.go

@@ -88,7 +88,8 @@ func (c Core) ListMultipartUploads(ctx context.Context, bucket, prefix, keyMarke
 
 // PutObjectPart - Upload an object part.
 func (c Core) PutObjectPart(ctx context.Context, bucket, object, uploadID string, partID int, data io.Reader, size int64, md5Base64, sha256Hex string, sse encrypt.ServerSide) (ObjectPart, error) {
-	return c.uploadPart(ctx, bucket, object, uploadID, data, partID, md5Base64, sha256Hex, size, sse)
+	streamSha256 := true
+	return c.uploadPart(ctx, bucket, object, uploadID, data, partID, md5Base64, sha256Hex, size, sse, streamSha256)
 }
 
 // ListObjectParts - List uploaded parts of an incomplete upload.x