krb5_error_code
kg_encrypt_iov(krb5_context context, int proto, int dce_style, size_t ec,
size_t rrc, krb5_key key, int usage, krb5_pointer iv,
gss_iov_buffer_desc *iov, int iov_count)
{
krb5_error_code code;
size_t blocksize;
krb5_data ivd, *pivd;
size_t kiov_count;
krb5_crypto_iov *kiov;
if (iv) {
code = krb5_c_block_size(context, key->keyblock.enctype, &blocksize);
if (code)
return(code);
ivd.length = blocksize;
ivd.data = malloc(ivd.length);
if (ivd.data == NULL)
return ENOMEM;
memcpy(ivd.data, iv, ivd.length);
pivd = &ivd;
} else {
pivd = NULL;
}
code = kg_translate_iov(context, proto, dce_style, ec, rrc,
key->keyblock.enctype, iov, iov_count,
&kiov, &kiov_count);
if (code == 0) {
code = krb5_k_encrypt_iov(context, key, usage, pivd, kiov, kiov_count);
free(kiov);
}
if (pivd != NULL)
free(pivd->data);
return code;
}
int
main ()
{
krb5_context context = 0;
krb5_data in, in2, out, out2, check, check2, state, signdata;
krb5_crypto_iov iov[5];
int i, j, pos;
unsigned int dummy;
size_t len;
krb5_enc_data enc_out, enc_out2;
krb5_keyblock *keyblock;
krb5_key key;
memset(iov, 0, sizeof(iov));
in.data = "This is a test.\n";
in.length = strlen (in.data);
in2.data = "This is another test.\n";
in2.length = strlen (in2.data);
test ("Seeding random number generator",
krb5_c_random_seed (context, &in));
/* Set up output buffers. */
out.data = malloc(2048);
out2.data = malloc(2048);
check.data = malloc(2048);
check2.data = malloc(2048);
if (out.data == NULL || out2.data == NULL
|| check.data == NULL || check2.data == NULL)
abort();
out.magic = KV5M_DATA;
out.length = 2048;
out2.magic = KV5M_DATA;
out2.length = 2048;
check.length = 2048;
check2.length = 2048;
for (i = 0; interesting_enctypes[i]; i++) {
krb5_enctype enctype = interesting_enctypes [i];
printf ("Testing enctype %d\n", enctype);
test ("Initializing a keyblock",
krb5_init_keyblock (context, enctype, 0, &keyblock));
test ("Generating random keyblock",
krb5_c_make_random_key (context, enctype, keyblock));
test ("Creating opaque key from keyblock",
krb5_k_create_key (context, keyblock, &key));
enc_out.ciphertext = out;
enc_out2.ciphertext = out2;
/* We use an intermediate `len' because size_t may be different size
than `int' */
krb5_c_encrypt_length (context, keyblock->enctype, in.length, &len);
enc_out.ciphertext.length = len;
/* Encrypt, decrypt, and see if we got the plaintext back again. */
test ("Encrypting (c)",
krb5_c_encrypt (context, keyblock, 7, 0, &in, &enc_out));
display ("Enc output", &enc_out.ciphertext);
test ("Decrypting",
krb5_c_decrypt (context, keyblock, 7, 0, &enc_out, &check));
test ("Comparing", compare_results (&in, &check));
/* Try again with the opaque-key-using variants. */
memset(out.data, 0, out.length);
test ("Encrypting (k)",
krb5_k_encrypt (context, key, 7, 0, &in, &enc_out));
display ("Enc output", &enc_out.ciphertext);
test ("Decrypting",
krb5_k_decrypt (context, key, 7, 0, &enc_out, &check));
test ("Comparing", compare_results (&in, &check));
/* Check if this enctype supports IOV encryption. */
if ( krb5_c_crypto_length(context, keyblock->enctype,
KRB5_CRYPTO_TYPE_HEADER, &dummy) == 0 ){
/* Set up iovecs for stream decryption. */
memcpy(out2.data, enc_out.ciphertext.data, enc_out.ciphertext.length);
iov[0].flags= KRB5_CRYPTO_TYPE_STREAM;
iov[0].data.data = out2.data;
iov[0].data.length = enc_out.ciphertext.length;
iov[1].flags = KRB5_CRYPTO_TYPE_DATA;
/* Decrypt the encrypted data from above and check it. */
test("IOV stream decrypting (c)",
krb5_c_decrypt_iov( context, keyblock, 7, 0, iov, 2));
test("Comparing results",
compare_results(&in, &iov[1].data));
/* Try again with the opaque-key-using variant. */
memcpy(out2.data, enc_out.ciphertext.data, enc_out.ciphertext.length);
test("IOV stream decrypting (k)",
krb5_k_decrypt_iov( context, key, 7, 0, iov, 2));
test("Comparing results",
compare_results(&in, &iov[1].data));
/* Set up iovecs for AEAD encryption. */
signdata.magic = KV5M_DATA;
signdata.data = (char *) "This should be signed";
signdata.length = strlen(signdata.data);
iov[0].flags = KRB5_CRYPTO_TYPE_HEADER;
iov[1].flags = KRB5_CRYPTO_TYPE_DATA;
iov[1].data = in; /*We'll need to copy memory before encrypt*/
iov[2].flags = KRB5_CRYPTO_TYPE_SIGN_ONLY;
iov[2].data = signdata;
iov[3].flags = KRB5_CRYPTO_TYPE_PADDING;
iov[4].flags = KRB5_CRYPTO_TYPE_TRAILER;
/* "Allocate" data for the iovec buffers from the "out" buffer. */
test("Setting up iov lengths",
krb5_c_crypto_length_iov(context, keyblock->enctype, iov, 5));
for (j=0,pos=0; j <= 4; j++ ){
if (iov[j].flags == KRB5_CRYPTO_TYPE_SIGN_ONLY)
continue;
iov[j].data.data = &out.data[pos];
pos += iov[j].data.length;
}
assert (iov[1].data.length == in.length);
memcpy(iov[1].data.data, in.data, in.length);
/* Encrypt and decrypt in place, and check the result. */
test("iov encrypting (c)",
krb5_c_encrypt_iov(context, keyblock, 7, 0, iov, 5));
assert(iov[1].data.length == in.length);
display("Header", &iov[0].data);
display("Data", &iov[1].data);
display("Padding", &iov[3].data);
display("Trailer", &iov[4].data);
test("iov decrypting",
krb5_c_decrypt_iov(context, keyblock, 7, 0, iov, 5));
test("Comparing results",
compare_results(&in, &iov[1].data));
/* Try again with opaque-key-using variants. */
test("iov encrypting (k)",
krb5_k_encrypt_iov(context, key, 7, 0, iov, 5));
assert(iov[1].data.length == in.length);
display("Header", &iov[0].data);
display("Data", &iov[1].data);
display("Padding", &iov[3].data);
display("Trailer", &iov[4].data);
test("iov decrypting",
krb5_k_decrypt_iov(context, key, 7, 0, iov, 5));
test("Comparing results",
compare_results(&in, &iov[1].data));
}
enc_out.ciphertext.length = out.length;
check.length = 2048;
test ("init_state",
krb5_c_init_state (context, keyblock, 7, &state));
test ("Encrypting with state",
krb5_c_encrypt (context, keyblock, 7, &state, &in, &enc_out));
display ("Enc output", &enc_out.ciphertext);
test ("Encrypting again with state",
krb5_c_encrypt (context, keyblock, 7, &state, &in2, &enc_out2));
display ("Enc output", &enc_out2.ciphertext);
test ("free_state",
krb5_c_free_state (context, keyblock, &state));
test ("init_state",
krb5_c_init_state (context, keyblock, 7, &state));
test ("Decrypting with state",
krb5_c_decrypt (context, keyblock, 7, &state, &enc_out, &check));
test ("Decrypting again with state",
krb5_c_decrypt (context, keyblock, 7, &state, &enc_out2, &check2));
test ("free_state",
krb5_c_free_state (context, keyblock, &state));
test ("Comparing",
compare_results (&in, &check));
test ("Comparing",
compare_results (&in2, &check2));
krb5_free_keyblock (context, keyblock);
krb5_k_free_key (context, key);
}
/* Test the RC4 decrypt fallback from key usage 9 to 8. */
test ("Initializing an RC4 keyblock",
krb5_init_keyblock (context, ENCTYPE_ARCFOUR_HMAC, 0, &keyblock));
test ("Generating random RC4 key",
krb5_c_make_random_key (context, ENCTYPE_ARCFOUR_HMAC, keyblock));
enc_out.ciphertext = out;
krb5_c_encrypt_length (context, keyblock->enctype, in.length, &len);
enc_out.ciphertext.length = len;
check.length = 2048;
test ("Encrypting with RC4 key usage 8",
krb5_c_encrypt (context, keyblock, 8, 0, &in, &enc_out));
display ("Enc output", &enc_out.ciphertext);
test ("Decrypting with RC4 key usage 9",
krb5_c_decrypt (context, keyblock, 9, 0, &enc_out, &check));
test ("Comparing", compare_results (&in, &check));
krb5_free_keyblock (context, keyblock);
free(out.data);
free(out2.data);
free(check.data);
free(check2.data);
return 0;
}
