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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| package signature | ||
|
|
||
| import ( | ||
| "net/http" | ||
| "net/url" | ||
| "strings" | ||
| ) | ||
|
|
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| // ref: https://github.com/minio/minio/cmd/auth-handler.go | ||
|
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| type authType int | ||
|
|
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| // List of all supported auth types. | ||
| const ( | ||
| authTypeUnknown authType = iota | ||
| authTypeStreamingSigned | ||
| authTypeSigned | ||
| authTypeStreamingSignedTrailer | ||
| authTypeStreamingUnsignedTrailer | ||
| ) | ||
|
|
||
| // Verify if request has AWS Signature Version '4'. | ||
| func isRequestSignatureV4(r *http.Request) bool { | ||
| return strings.HasPrefix(r.Header.Get(headerAuth), "AWS4-HMAC-SHA256") | ||
| } | ||
|
|
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| // Verify if the request has AWS Streaming Signature Version '4'. This is only valid for 'PUT' operation. | ||
| func isRequestSignStreamingV4(r *http.Request) bool { | ||
| return r.Header.Get("X-Amz-Content-Sha256") == streamingContentSHA256 && | ||
| r.Method == http.MethodPut | ||
| } | ||
|
|
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| // Verify if the request has AWS Streaming Signature Version '4'. This is only valid for 'PUT' operation. | ||
| func isRequestSignStreamingTrailerV4(r *http.Request) bool { | ||
| return r.Header.Get("X-Amz-Content-Sha256") == streamingContentSHA256Trailer && | ||
| r.Method == http.MethodPut | ||
| } | ||
|
|
||
| // Verify if the request has AWS Streaming Signature Version '4', with unsigned content and trailer. | ||
| func isRequestUnsignedTrailerV4(r *http.Request) bool { | ||
| return r.Header.Get("X-Amz-Content-Sha256") == "STREAMING-UNSIGNED-PAYLOAD-TRAILER" && | ||
| r.Method == http.MethodPut && strings.Contains(r.Header.Get("Content-Encoding"), "aws-chunked") | ||
| } | ||
|
|
||
| // Get request authentication type. | ||
| func getRequestAuthType(r *http.Request) (at authType) { | ||
| if r.URL != nil { | ||
| var err error | ||
| r.Form, err = url.ParseQuery(r.URL.RawQuery) | ||
| if err != nil { | ||
| return authTypeUnknown | ||
| } | ||
| } | ||
| if isRequestSignStreamingV4(r) { | ||
| return authTypeStreamingSigned | ||
| } else if isRequestSignStreamingTrailerV4(r) { | ||
| return authTypeStreamingSignedTrailer | ||
| } else if isRequestUnsignedTrailerV4(r) { | ||
| return authTypeStreamingUnsignedTrailer | ||
| } else if isRequestSignatureV4(r) { | ||
| return authTypeSigned | ||
| } | ||
| return authTypeUnknown | ||
| } | ||
|
|
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| func IsSupportedAuthentication(req *http.Request) bool { | ||
| return getRequestAuthType(req) != authTypeUnknown | ||
| } |
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