问题
SHA1(data, length, hash);
unsigned char *labelPtr;
labelPtr = hash;
mpz_set_str (encrypted, labelPtr, 16);
gmp_printf("hashed= %Zd\n", encrypted);
encrypted equals 0?
I need to get an integer from this hash so that I can perform RSA encryption. I see the hash when I debug, but cannot seem to turn this into an int. It is SHA-512 so 512 bits?
Weird characters come out of printf("%s",hash);
atoi gives 0 too, do I have to break up the hash by character? That would work I think.
回答1:
mpz_set_str second parameter must be a string.
The hash argument you pass to SHA1 function is probably not a string. Convert it to a string format before passing it to the mpz_set_str function.
来源：https://stackoverflow.com/questions/12772102/how-to-convert-openssl-sha-512-hash-to-gmp-number-to-use-in-rsa-encryption-metho