Data.Cloud.CloudAPI.pas
有一些文件上返回错误的SHA 256的class function TCloudSHA256Authentication.GetStreamToHashSHA256Hex(const Content: TStream): string;
。delphi THashSHA2在大文件上返回一个错误的SHA256
class function TCloudSHA256Authentication.GetStreamToHashSHA256Hex(const Content: TStream): string;
var
LBytes : TBytes;
Hash: THashSHA2;
begin
LBytes := TBytesStream(Content).Bytes;
//Hash bytes
Hash := THashSHA2.Create;
Hash.Update(LBytes);
Result := Hash.HashAsString;
end;
AWS S3返回错误:
The provided x-amz-content-sha256 header does not match what was computed
GetStreamToHashSHA256Hex似乎从亚马逊产生不同的SHA256:
<ClientComputedContentSHA256>f43ee89e2b7758057bb1f33eb8546d4c2c118f2ab932de89dbd74aabc0651053</ClientComputedContentSHA256>
<S3ComputedContentSHA256>3bbf5f864cc139cf6392b4623bd782a69d16929db713bffaa68035f8a5c3c0ce</S3ComputedContentSHA256>
我做了一些测试,机智myfile.zip(600 MB)。 ..
TIdHashSHA256
Indy的替代选项返回正确的SHA256(aws s3的相同),例如:
var
aFileStream: TFileStream;
aHash: TIdHashSHA256;
begin
aFileStream := TFileStream.Create('C:\myfile.zip', fmOpenRead or fmShareDenyWrite);
aHash := TIdHashSHA256.Create;
try
Result := aHash.HashStreamAsHex(aFileStream).ToLower;
finally
aFileStream.Free;
aHash.Free;
end;
end;
hash_file()
从PHP返回正确的SHA256(相同AWS的S3),例如:
hash_file('sha256', 'C:\myfile.zip');
但THashSHA2返回一个错误SHA256,如:
var
LBytes : TBytes;
Hash: THashSHA2;
begin
LBytes := TFile.ReadAllBytes('C:\myfile.zip');
Hash := THashSHA2.Create;
Hash.Update(LBytes);
Result := Hash.HashAsString;
end;
为什么?
UPDATE
这是我的错误修复。进口Data.Cloud.CloudAPI.pas到项目和重写这些功能:
uses IdHash, IdHashSHA, IdSSLOpenSSL;
class function TCloudSHA256Authentication.GetHashSHA256Hex(HashString: string): string;
var
aHash: TIdHashSHA256;
begin
LoadOpenSSLLibrary;
try
if not(TIdHashSHA256.IsAvailable) then
raise Exception.Create('HashSHA256 Isn''t available!');
aHash := TIdHashSHA256.Create;
try
Result := aHash.HashStringAsHex(HashString).ToLower;
finally
aHash.Free;
end;
finally
UnLoadOpenSSLLibrary;
end;
end;
class function TCloudSHA256Authentication.GetStreamToHashSHA256Hex(const Content: TStream): string;
var
aHash: TIdHashSHA256;
begin
LoadOpenSSLLibrary;
try
if not(TIdHashSHA256.IsAvailable) then
raise Exception.Create('HashSHA256 Isn''t available!');
aHash := TIdHashSHA256.Create;
try
Result := aHash.HashStreamAsHex(Content).ToLower;
finally
aHash.Free;
end;
finally
UnLoadOpenSSLLibrary;
end;
end;
更新2
我也尝试实行FREDS建议,它的工作原理:
class function TCloudSHA256Authentication.GetHashSHA256Hex(HashString: string): string;
var
Content: TStringStream;
Hash: THashSHA2;
LBytes: TArray<Byte>;
Buffer: PByte;
BufLen: Integer;
Readed: Integer;
begin
BufLen := 16 * 1024;
Buffer := AllocMem(BufLen);
Hash := THashSHA2.Create;
Content := TStringStream.Create(HashString);
try
while Content.Position < Content.Size do
begin
Readed := Content.Read(Buffer^, BufLen);
if Readed > 0 then
Hash.update(Buffer^, Readed);
end;
finally
Content.Free;
FreeMem(Buffer);
end;
Result := Hash.HashAsString;
end;
class function TCloudSHA256Authentication.GetStreamToHashSHA256Hex(const Content: TStream): string;
var
LBytes : TBytes;
Hash: THashSHA2;
Buffer: PByte;
BufLen: Integer;
Readed: Integer;
begin
BufLen := 16 * 1024;
Buffer := AllocMem(BufLen);
Hash := THashSHA2.Create;
try
Content.Seek(0, soFromBeginning);
while Content.Position < Content.Size do
begin
Readed := Content.Read(Buffer^, BufLen);
if Readed > 0 then
Hash.update(Buffer^, Readed);
end;
Content.Seek(0, soFromBeginning);
finally
FreeMem(Buffer);
end;
Result := Hash.HashAsString;
end;
显然'THashSHA2'是越野车然后。请与Embarcadero [提交错误报告](http://quality.embarcadero.com)。 –
@RemyLebeau THashSHA2是越野车,你知道解决它的任何解决方法吗? – ar099968
您可以使用许多正确的实现。找一个。用它。 –