Someone asked for an example of decoding with OpenSSL on the Howto base64 encode with C/C++ and OpenSSL post. So here it is:
[code lang=”c”]
#include
#include
#include
#include
#include
#include
char *unbase64(unsigned char *input, int length);
int main(int argc, char **argv)
{
char *output = unbase64(“WU9ZTyEA\n\0”, strlen(“WU9ZTyEA\n\0”));
printf(“Unbase64: *%s*\n”, output);
free(output);
}
char *unbase64(unsigned char *input, int length)
{
BIO *b64, *bmem;
char *buffer = (char *)malloc(length);
memset(buffer, 0, length);
b64 = BIO_new(BIO_f_base64());
bmem = BIO_new_mem_buf(input, length);
bmem = BIO_push(b64, bmem);
BIO_read(bmem, buffer, length);
BIO_free_all(bmem);
return buffer;
}
[/code]
[tags]C,C++,OpenSSL[/tags]