/*      $OpenBSD: test_helper.c,v 1.13 2021/12/14 21:25:27 deraadt Exp $        */
/*
 * Copyright (c) 2011 Damien Miller <djm@mindrot.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* Utility functions/framework for regress tests */

#include "includes.h"

#include <sys/types.h>
#include <sys/uio.h>

#include <stdarg.h>
#include <fcntl.h>
#include <stdio.h>
#ifdef HAVE_STDINT_H
# include <stdint.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <unistd.h>
#include <signal.h>

#ifdef WITH_OPENSSL
#include <openssl/bn.h>
#include <openssl/err.h>
#endif

#if defined(HAVE_STRNVIS) && defined(HAVE_VIS_H) && !defined(BROKEN_STRNVIS)
# include <vis.h>
#endif

#define MINIMUM(a, b)    (((a) < (b)) ? (a) : (b))

#include "entropy.h"
#include "test_helper.h"
#include "atomicio.h"

#define TEST_CHECK_INT(r, pred) do {            \
                switch (pred) {                 \
                case TEST_EQ:                   \
                        if (r == 0)             \
                                return;         \
                        break;                  \
                case TEST_NE:                   \
                        if (r != 0)             \
                                return;         \
                        break;                  \
                case TEST_LT:                   \
                        if (r < 0)              \
                                return;         \
                        break;                  \
                case TEST_LE:                   \
                        if (r <= 0)             \
                                return;         \
                        break;                  \
                case TEST_GT:                   \
                        if (r > 0)              \
                                return;         \
                        break;                  \
                case TEST_GE:                   \
                        if (r >= 0)             \
                                return;         \
                        break;                  \
                default:                        \
                        abort();                \
                }                               \
        } while (0)

#define TEST_CHECK(x1, x2, pred) do {           \
                switch (pred) {                 \
                case TEST_EQ:                   \
                        if (x1 == x2)           \
                                return;         \
                        break;                  \
                case TEST_NE:                   \
                        if (x1 != x2)           \
                                return;         \
                        break;                  \
                case TEST_LT:                   \
                        if (x1 < x2)            \
                                return;         \
                        break;                  \
                case TEST_LE:                   \
                        if (x1 <= x2)           \
                                return;         \
                        break;                  \
                case TEST_GT:                   \
                        if (x1 > x2)            \
                                return;         \
                        break;                  \
                case TEST_GE:                   \
                        if (x1 >= x2)           \
                                return;         \
                        break;                  \
                default:                        \
                        abort();                \
                }                               \
        } while (0)

extern char *__progname;

static int verbose_mode = 0;
static int quiet_mode = 0;
static char *active_test_name = NULL;
static u_int test_number = 0;
static test_onerror_func_t *test_onerror = NULL;
static void *onerror_ctx = NULL;
static const char *data_dir = NULL;
static char subtest_info[512];
static int fast = 0;
static int slow = 0;

int
main(int argc, char **argv)
{
        int ch;

        seed_rng();
#ifdef WITH_OPENSSL
        ERR_load_crypto_strings();
#endif

        /* Handle systems without __progname */
        if (__progname == NULL) {
                __progname = strrchr(argv[0], '/');
                if (__progname == NULL || __progname[1] == '\0')
                        __progname = argv[0];   
                else
                        __progname++;
                if ((__progname = strdup(__progname)) == NULL) {
                        fprintf(stderr, "strdup failed\n");
                        exit(1);
                }
        }

        while ((ch = getopt(argc, argv, "Ffvqd:")) != -1) {
                switch (ch) {
                case 'F':
                        slow = 1;
                        break;
                case 'f':
                        fast = 1;
                        break;
                case 'd':
                        data_dir = optarg;
                        break;
                case 'q':
                        verbose_mode = 0;
                        quiet_mode = 1;
                        break;
                case 'v':
                        verbose_mode = 1;
                        quiet_mode = 0;
                        break;
                default:
                        fprintf(stderr, "Unrecognised command line option\n");
                        fprintf(stderr, "Usage: %s [-v]\n", __progname);
                        exit(1);
                }
        }
        setvbuf(stdout, NULL, _IONBF, 0);
        if (!quiet_mode)
                printf("%s: ", __progname);
        if (verbose_mode)
                printf("\n");

        tests();

        if (!quiet_mode)
                printf(" %u tests ok\n", test_number);
        return 0;
}

int
test_is_verbose(void)
{
        return verbose_mode;
}

int
test_is_quiet(void)
{
        return quiet_mode;
}

int
test_is_fast(void)
{
        return fast;
}

int
test_is_slow(void)
{
        return slow;
}

const char *
test_data_file(const char *name)
{
        static char ret[PATH_MAX];

        if (data_dir != NULL)
                snprintf(ret, sizeof(ret), "%s/%s", data_dir, name);
        else
                strlcpy(ret, name, sizeof(ret));
        if (access(ret, F_OK) != 0) {
                fprintf(stderr, "Cannot access data file %s: %s\n",
                    ret, strerror(errno));
                exit(1);
        }
        return ret;
}

void
test_info(char *s, size_t len)
{
        snprintf(s, len, "In test %u: \"%s\"%s%s\n", test_number,
            active_test_name == NULL ? "<none>" : active_test_name,
            *subtest_info != '\0' ? " - " : "", subtest_info);
}

static void
siginfo(int unused __attribute__((__unused__)))
{
        char buf[256];

        test_info(buf, sizeof(buf));
        atomicio(vwrite, STDERR_FILENO, buf, strlen(buf));
}

void
test_start(const char *n)
{
        assert(active_test_name == NULL);
        assert((active_test_name = strdup(n)) != NULL);
        *subtest_info = '\0';
        if (verbose_mode)
                printf("test %u - \"%s\": ", test_number, active_test_name);
        test_number++;
#ifdef SIGINFO
        signal(SIGINFO, siginfo);
#endif
        signal(SIGUSR1, siginfo);
}

void
set_onerror_func(test_onerror_func_t *f, void *ctx)
{
        test_onerror = f;
        onerror_ctx = ctx;
}

void
test_done(void)
{
        *subtest_info = '\0';
        assert(active_test_name != NULL);
        free(active_test_name);
        active_test_name = NULL;
        if (verbose_mode)
                printf("OK\n");
        else if (!quiet_mode) {
                printf(".");
                fflush(stdout);
        }
}

void
test_subtest_info(const char *fmt, ...)
{
        va_list ap;

        va_start(ap, fmt);
        vsnprintf(subtest_info, sizeof(subtest_info), fmt, ap);
        va_end(ap);
}

void
ssl_err_check(const char *file, int line)
{
#ifdef WITH_OPENSSL
        long openssl_error = ERR_get_error();

        if (openssl_error == 0)
                return;

        fprintf(stderr, "\n%s:%d: uncaught OpenSSL error: %s",
            file, line, ERR_error_string(openssl_error, NULL));
#else /* WITH_OPENSSL */
        fprintf(stderr, "\n%s:%d: uncaught OpenSSL error ",
            file, line);
#endif /* WITH_OPENSSL */
        abort();
}

static const char *
pred_name(enum test_predicate p)
{
        switch (p) {
        case TEST_EQ:
                return "EQ";
        case TEST_NE:
                return "NE";
        case TEST_LT:
                return "LT";
        case TEST_LE:
                return "LE";
        case TEST_GT:
                return "GT";
        case TEST_GE:
                return "GE";
        default:
                return "UNKNOWN";
        }
}

static void
test_die(void)
{
        if (test_onerror != NULL)
                test_onerror(onerror_ctx);
        abort();
}

static void
test_header(const char *file, int line, const char *a1, const char *a2,
    const char *name, enum test_predicate pred)
{
        fprintf(stderr, "\n%s:%d test #%u \"%s\"%s%s\n", 
            file, line, test_number, active_test_name,
            *subtest_info != '\0' ? " - " : "", subtest_info);
        fprintf(stderr, "ASSERT_%s_%s(%s%s%s) failed:\n",
            name, pred_name(pred), a1,
            a2 != NULL ? ", " : "", a2 != NULL ? a2 : "");
}

#ifdef WITH_OPENSSL
void
assert_bignum(const char *file, int line, const char *a1, const char *a2,
    const BIGNUM *aa1, const BIGNUM *aa2, enum test_predicate pred)
{
        int r = BN_cmp(aa1, aa2);

        TEST_CHECK_INT(r, pred);
        test_header(file, line, a1, a2, "BIGNUM", pred);
        fprintf(stderr, "%12s = 0x%s\n", a1, BN_bn2hex(aa1));
        fprintf(stderr, "%12s = 0x%s\n", a2, BN_bn2hex(aa2));
        test_die();
}
#endif

void
assert_string(const char *file, int line, const char *a1, const char *a2,
    const char *aa1, const char *aa2, enum test_predicate pred)
{
        int r;

        /* Verify pointers are not NULL */
        assert_ptr(file, line, a1, "NULL", aa1, NULL, TEST_NE);
        assert_ptr(file, line, a2, "NULL", aa2, NULL, TEST_NE);

        r = strcmp(aa1, aa2);
        TEST_CHECK_INT(r, pred);
        test_header(file, line, a1, a2, "STRING", pred);
        fprintf(stderr, "%12s = %s (len %zu)\n", a1, aa1, strlen(aa1));
        fprintf(stderr, "%12s = %s (len %zu)\n", a2, aa2, strlen(aa2));
        test_die();
}

static char *
tohex(const void *_s, size_t l)
{
        u_int8_t *s = (u_int8_t *)_s;
        size_t i, j;
        const char *hex = "0123456789abcdef";
        char *r = malloc((l * 2) + 1);

        assert(r != NULL);
        for (i = j = 0; i < l; i++) {
                r[j++] = hex[(s[i] >> 4) & 0xf];
                r[j++] = hex[s[i] & 0xf];
        }
        r[j] = '\0';
        return r;
}

void
assert_mem(const char *file, int line, const char *a1, const char *a2,
    const void *aa1, const void *aa2, size_t l, enum test_predicate pred)
{
        int r;
        char *aa1_tohex = NULL;
        char *aa2_tohex = NULL;

        if (l == 0)
                return;
        /* If length is >0, then verify pointers are not NULL */
        assert_ptr(file, line, a1, "NULL", aa1, NULL, TEST_NE);
        assert_ptr(file, line, a2, "NULL", aa2, NULL, TEST_NE);

        r = memcmp(aa1, aa2, l);
        TEST_CHECK_INT(r, pred);
        test_header(file, line, a1, a2, "STRING", pred);
        aa1_tohex = tohex(aa1, MINIMUM(l, 256));
        aa2_tohex = tohex(aa2, MINIMUM(l, 256));
        fprintf(stderr, "%12s = %s (len %zu)\n", a1, aa1_tohex, l);
        fprintf(stderr, "%12s = %s (len %zu)\n", a2, aa2_tohex, l);
        free(aa1_tohex);
        free(aa2_tohex);
        test_die();
}

static int
memvalcmp(const u_int8_t *s, u_char v, size_t l, size_t *where)
{
        size_t i;

        for (i = 0; i < l; i++) {
                if (s[i] != v) {
                        *where = i;
                        return 1;
                }
        }
        return 0;
}

void
assert_mem_filled(const char *file, int line, const char *a1,
    const void *aa1, u_char v, size_t l, enum test_predicate pred)
{
        size_t where = -1;
        int r;
        char tmp[64];
        char *aa1_tohex = NULL;

        if (l == 0)
                return;
        /* If length is >0, then verify the pointer is not NULL */
        assert_ptr(file, line, a1, "NULL", aa1, NULL, TEST_NE);

        r = memvalcmp(aa1, v, l, &where);
        TEST_CHECK_INT(r, pred);
        test_header(file, line, a1, NULL, "MEM_ZERO", pred);
        aa1_tohex = tohex(aa1, MINIMUM(l, 20));
        fprintf(stderr, "%20s = %s%s (len %zu)\n", a1,
            aa1_tohex, l > 20 ? "..." : "", l);
        free(aa1_tohex);
        snprintf(tmp, sizeof(tmp), "(%s)[%zu]", a1, where);
        fprintf(stderr, "%20s = 0x%02x (expected 0x%02x)\n", tmp,
            ((u_char *)aa1)[where], v);
        test_die();
}

void
assert_int(const char *file, int line, const char *a1, const char *a2,
    int aa1, int aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "INT", pred);
        fprintf(stderr, "%12s = %d\n", a1, aa1);
        fprintf(stderr, "%12s = %d\n", a2, aa2);
        test_die();
}

void
assert_size_t(const char *file, int line, const char *a1, const char *a2,
    size_t aa1, size_t aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "SIZE_T", pred);
        fprintf(stderr, "%12s = %zu\n", a1, aa1);
        fprintf(stderr, "%12s = %zu\n", a2, aa2);
        test_die();
}

void
assert_u_int(const char *file, int line, const char *a1, const char *a2,
    u_int aa1, u_int aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "U_INT", pred);
        fprintf(stderr, "%12s = %u / 0x%x\n", a1, aa1, aa1);
        fprintf(stderr, "%12s = %u / 0x%x\n", a2, aa2, aa2);
        test_die();
}

void
assert_long(const char *file, int line, const char *a1, const char *a2,
    long aa1, long aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "LONG", pred);
        fprintf(stderr, "%12s = %ld / 0x%lx\n", a1, aa1, aa1);
        fprintf(stderr, "%12s = %ld / 0x%lx\n", a2, aa2, aa2);
        test_die();
}

void
assert_long_long(const char *file, int line, const char *a1, const char *a2,
    long long aa1, long long aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "LONG LONG", pred);
        fprintf(stderr, "%12s = %lld / 0x%llx\n", a1, aa1, aa1);
        fprintf(stderr, "%12s = %lld / 0x%llx\n", a2, aa2, aa2);
        test_die();
}

void
assert_char(const char *file, int line, const char *a1, const char *a2,
    char aa1, char aa2, enum test_predicate pred)
{
        char buf[8];

        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "CHAR", pred);
        fprintf(stderr, "%12s = '%s' / 0x02%x\n", a1,
            vis(buf, aa1, VIS_SAFE|VIS_NL|VIS_TAB|VIS_OCTAL, 0), aa1);
        fprintf(stderr, "%12s = '%s' / 0x02%x\n", a1,
            vis(buf, aa2, VIS_SAFE|VIS_NL|VIS_TAB|VIS_OCTAL, 0), aa2);
        test_die();
}

void
assert_u8(const char *file, int line, const char *a1, const char *a2,
    u_int8_t aa1, u_int8_t aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "U8", pred);
        fprintf(stderr, "%12s = 0x%02x %u\n", a1, aa1, aa1);
        fprintf(stderr, "%12s = 0x%02x %u\n", a2, aa2, aa2);
        test_die();
}

void
assert_u16(const char *file, int line, const char *a1, const char *a2,
    u_int16_t aa1, u_int16_t aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "U16", pred);
        fprintf(stderr, "%12s = 0x%04x %u\n", a1, aa1, aa1);
        fprintf(stderr, "%12s = 0x%04x %u\n", a2, aa2, aa2);
        test_die();
}

void
assert_u32(const char *file, int line, const char *a1, const char *a2,
    u_int32_t aa1, u_int32_t aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "U32", pred);
        fprintf(stderr, "%12s = 0x%08x %u\n", a1, aa1, aa1);
        fprintf(stderr, "%12s = 0x%08x %u\n", a2, aa2, aa2);
        test_die();
}

void
assert_u64(const char *file, int line, const char *a1, const char *a2,
    u_int64_t aa1, u_int64_t aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "U64", pred);
        fprintf(stderr, "%12s = 0x%016llx %llu\n", a1,
            (unsigned long long)aa1, (unsigned long long)aa1);
        fprintf(stderr, "%12s = 0x%016llx %llu\n", a2,
            (unsigned long long)aa2, (unsigned long long)aa2);
        test_die();
}

void
assert_ptr(const char *file, int line, const char *a1, const char *a2,
    const void *aa1, const void *aa2, enum test_predicate pred)
{
        TEST_CHECK(aa1, aa2, pred);
        test_header(file, line, a1, a2, "PTR", pred);
        fprintf(stderr, "%12s = %p\n", a1, aa1);
        fprintf(stderr, "%12s = %p\n", a2, aa2);
        test_die();
}