I had to double check something--I was wrong about something--&outlen is not incremented inside of openssl--so you have to keep another variable to which you add outlen and use that to set the read/write pointer in outbuf. --Sam On Wed, Sep 5, 2018 at 10:04 AM Sam Habiel <sam.habiel@xxxxxxxxx> wrote: > > First time poster. I hope I am writing to the right place. > > Example for "General encryption and decryption function example using > FILE I/O and AES128 with a 128-bit key" has two errors. I spent a lot > of time trying to figure out what I did wrong for a while... > > 1. ctx is already a pointer; it does not need to be indirected to get > the pointer. > > EVP_CipherInit_ex(&ctx, EVP_aes_128_cbc(), NULL, NULL, NULL, > do_encrypt); > > should say: > > EVP_CipherInit_ex(ctx, EVP_aes_128_cbc(), NULL, NULL, NULL, do_encrypt); > > 2. ciphertext length is not used to update write position: > > if(!EVP_CipherUpdate(ctx, outbuf, &outlen, inbuf, inlen)) > and > > if(!EVP_CipherFinal_ex(ctx, outbuf, &outlen)) > > should say (what worked for me): > > if(!EVP_CipherUpdate(ctx, outbuf + outlen, &outlen, > inbuf, inlen)) > > and > if(!EVP_CipherFinal_ex(ctx, outbuf + outlen, &outlen)) > > It would be nice if there is a complete example that compiles and has > a main() to run it. > > --Sam -- openssl-users mailing list To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users
