![]() Var base64EncodedBytes = Convert.FromBase64String(base64String) We are going to use the output from ToBase64String() conversion for “world!”, the base64String variable: // before: d29ybGQh It converts from Base64 to its equivalent 8-bit unsigned integer array. This method is the opposite of the ToBase64String() method. Decode the Base64 String in C# With FromBase64String() We can see that the value has been broken into two lines. after: VGhlIGdyZWF0IGNyb2NvZGlsZSBvZiBRdWVlbnNsYW5kIGNhbiBhdHRhaW4gYSBsZW5ndGggb2Yg Var base64String = Convert.ToBase64String(textBytes, Base64FormattingOptions.InsertLineBreaks) Var textBytes = ("The great crocodile of Queensland can attain a length of 30 feet") Conversely, the encoding scheme will add a line break for every 76 characters. Line breaks can improve the readability of our Base64 text and also assist us while using tools that don’t deal well with long lines. We can use the options parameter to insert line breaks within our Base64 output. Using the last example, the value for this parameter was 6. We can use this parameter to state the number of elements or variables we want to encode. This parameter works hand-in-hand with the offset parameter. Var base64String = Convert.ToBase64String(textBytes, 6, 6) Similarly, the Base64 output will be different from the result we got when all the value was encoded: var textBytes = ("Hello world!") ![]() We must pair this parameter with the length option to make it work. Using our last example of “Hello world!”, if we want to encode only “world!”, we will set our optional parameter to 6. It states the position we want our encoding to start from. Var base64String = Convert.ToBase64String(textBytes) Bitcoin signature malformed base64 encoding code#Without tracking down the code this calls, that looks like it should recover and encode the pubkey whether it also verifies the signature is not obvious.Var textBytes = ("Hello world!") $derPubKey = Signature::getPubKeyWithRS($flag, $R, $S, $hash) That correctly parses a plain-format signature (not DER), from base64. ![]() $flag = hexdec(bin2hex(substr($signature, 0, 1))) The code you link to appears correct: $signature = base64_decode($encodedSignature) Your signature should not be and is not in DER format. The computation of the r,s values in an ECDSA (which as Oscar correctly commented are not a point) is the same either way, but the data being signed for a message can never be the same as for a transaction so the signatures can never actually be the same value. I try alot of methods but no luck, are R/S signature in both signed message and DER signature means to same?īitcoin transactions use DER format for the signature (plus sighash byte), but bitcoin messages use 'plain' format (aka P1363, CVC, PKCS11, Microsoft, JWS and more) (plus recovery byte). If another party send me DER signature, how do i convert it into base64_encoded string? so end up i am able to use function i mention just now. My program check valid signature using function in I realized that this DER signature is fail in signature verification. after that, i use R/S signature to generate DER signature. Then i manage to get R/S signature from $decoded_content. ![]() My working way is $decoded_content = bin2hex(base64_decode(IPnTEOU713+XclrBrUEfTLeP0A7QIR4lObzQjBjyxGQExPwkalrQK1JOggIWk4xrfWIjHEC0RKGv3vtguDfto0o=)) IPnTEOU713+XclrBrUEfTLeP0A7QIR4lObzQjBjyxGQExPwkalrQK1JOggIWk4xrfWIjHEC0RKGv3vtguDfto0o= i realize that R/S signature in DER signature is not match to the 1 in bitcoin signed message? Ok below is my say signed message. This time is difficult for me to explain problem i was facing. ![]()
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