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/*
* eax-test.c: test harness for EAX, implementation
*/
/*
* This file is Free Software. It was originally written for secnet.
*
* Copyright 2013 Ian Jackson
* Copyright 2013 Mark Wooding
*
* You may redistribute secnet as a whole and/or modify it under the
* terms of the GNU General Public License as published by the Free
* Software Foundation; either version 3, or (at your option) any
* later version.
*
* You may redistribute this file and/or modify it under the terms of
* the GNU General Public License as published by the Free Software
* Foundation; either version 2, or (at your option) any later
* version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, see
* https://www.gnu.org/licenses/gpl.html.
*/
/*
* usages:
* ./eax-foo-test <eax-foo-test.vectors
* runs the test vectors, regenerates the file on stdout
* grep -v CIPHER <eax-foo-test.vectors | ./eax-foo-test
* generates output with CIPHER lines reinserted
* All errors result in calls to abort().
*/
#include "eax-test.h"
struct valbuf {
_Bool got;
uint8_t v[1024];
size_t len;
};
#define V(vb) ((vb).v), ((vb).len)
static struct valbuf msg, key, nonce, header, cipher, ourcipher, returnplain;
static size_t tau;
static void trydecrypt(_Bool expected)
{
_Bool actual = eax_decrypt(-1, V(nonce), V(header), V(ourcipher), tau,
returnplain.v);
assert(actual == expected);
if (actual) {
returnplain.len = ourcipher.len - tau;
assert(returnplain.len == msg.len);
assert(!memcmp(returnplain.v, msg.v, msg.len));
}
}
static void negtest(struct valbuf *perturb)
{
unsigned delta = 0x04;
size_t i;
for (i=0; i<perturb->len; i++) {
perturb->v[i] ^= delta;
trydecrypt(0);
perturb->v[i] ^= delta;
}
}
static void something(void)
{
if (!msg.got) return;
assert(key.got);
assert(nonce.got);
assert(header.got);
eaxtest_blockcipher_key_setup(V(key));
eax_setup(-1);
if (cipher.got) {
assert(cipher.len > msg.len);
tau = cipher.len - msg.len;
assert(tau <= blocksize);
} else {
assert(msg.len + blocksize < sizeof(ourcipher.v));
tau = blocksize;
}
ourcipher.len = msg.len + tau;
eax_encrypt(-1, V(nonce), V(header), V(msg), tau, ourcipher.v);
if (cipher.got) {
assert(ourcipher.len == cipher.len);
assert(!memcmp(ourcipher.v, cipher.v, cipher.len));
trydecrypt(1);
negtest(&ourcipher);
negtest(&header);
} else {
size_t i;
printf("CIPHER: ");
for (i=0; i<ourcipher.len; i++)
printf("%02X", ourcipher.v[i]);
putchar('\n');
}
msg.got=key.got=nonce.got=header.got=0;
}
static int getputchar(void)
{
int c = getchar();
assert(c != EOF);
putchar(c);
return c;
}
int main(int argc, const char *const *argv)
{
struct valbuf *cv;
assert(argc==1);
for (;;) {
int c = getchar();
switch (c) {
case 'M': something(); cv = &msg; putchar(c); break;
case 'K': cv = &key; putchar(c); break;
case 'N': cv = &nonce; putchar(c); break;
case 'H': cv = &header; putchar(c); break;
case 'C': cv = &cipher; putchar(c); break;
case '\n': putchar(c); continue;
case EOF: something(); exit(0);
default: assert(!"unexpected input");
}
cv->got = 1;
cv->len = 0;
for (;;) {
c = getputchar();
if (c == ':') break;
assert(isalpha(c));
}
for (;;) {
char hbuf[3], *ep;
c = getputchar();
if (c == '\n') break;
if (isspace(c)) continue;
assert(isprint(c));
hbuf[0] = c;
c = getputchar();
assert(isprint(c));
hbuf[1] = c;
hbuf[2] = 0;
assert(cv->len < sizeof(cv->v));
cv->v[cv->len++] = strtoul(hbuf,&ep,16);
assert(!*ep);
}
}
assert(!ferror(stdin));
assert(feof(stdin));
assert(!ferror(stdout));
assert(!fflush(stdout));
return 0;
}
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