unsigned chars - Externals

15 years ago by donald sullivan — view source — reply

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Hello,

is it possible to return unsigned chars from an extension?
I have looked and cant find anything on it, or maybe i am looking for the wrong keywords.

Thanks

ps i sent this to the general list on accident. i am not trying to flood the list.

15 years ago by Alexey Zakhlestin — view source — reply

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is it possible to return unsigned chars from an extension?
I have looked and cant find anything on it, or maybe i am looking for the wrong keywords.

Return to PHP-code?

No. PHP doesn't have explicitly signed or unsigned chars. PHP has "strings"
you can return:

string of chars
int (array of ints?)

Also, see http://docs.php.net/ord
ord() function converts first byte of byte-string to it's unsigned numeric representation

15 years ago by Alexey Zakhlestin — view source — reply

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Use "reply all" when writing to mailing-list.

what i am trying to do is RSA encryption

I have a working setup doing encryption and decryption at the same time. i want to store the encrypted value and be able to decrypted it later

if i encrypt the data and send the data straight to the decrypt function it works fine

int decryptRetVal = RSA_public_decrypt(512, Buffer, plainText, rsaPubKey, RSA_PKCS1_PADDING);

if i try to send the output of the encryption to the php side for storage, or even write it to a file and then read that file for decryption it fails every time

int decryptRetVal = RSA_public_decrypt(512, (unsigned char *)Z_STRVAL(zret), plainText, rsaPubKey, RSA_PKCS1_PADDING);

how can i store the encrypted output for later use?

well, it should work
you don't give details, so I can't say what are you doing wrong.

I can give you only generic debugging advices:
make sure that the data you store on php-side is equivalent to the data you expect to get on C-level.
If it is not — try to locate the step which corrupts the data, etc.