--- /dev/null
+/* $OpenBSD: err_test.c,v 1.1 2024/10/02 14:41:46 jsing Exp $ */
+/*
+ * Copyright (c) 2024 Joel Sing <jsing@openbsd.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.
+ */
+
+#include <string.h>
+
+#include <openssl/bn.h>
+#include <openssl/crypto.h>
+#include <openssl/err.h>
+
+/*
+ * This should also test:
+ * - error handling with more than ERR_NUM_ERRORS.
+ * - multi-threaded use.
+ */
+
+static int
+err_test(void)
+{
+ const char *file, *s;
+ char buf[2048];
+ unsigned long err;
+ int line;
+ int failed = 1;
+
+ ERR_load_crypto_strings();
+
+ ERR_remove_state(0);
+
+ ERR_clear_error();
+
+ if ((err = ERR_peek_error()) != 0) {
+ fprintf(stderr, "FAIL: ERR_peek_error() = %lx, want "
+ "0x0\n", err);
+ goto failure;
+ }
+ if ((err = ERR_get_error()) != 0) {
+ fprintf(stderr, "FAIL: ERR_get_error() = %lx, want "
+ "0x0\n", err);
+ goto failure;
+ }
+
+ ERR_put_error(ERR_LIB_SYS, SYS_F_SOCKET, ERR_R_MALLOC_FAILURE,
+ "sys.c", 100);
+ ERR_put_error(ERR_LIB_BN, BN_F_BN_USUB, BN_R_DIV_BY_ZERO,
+ "bn.c", 200);
+
+ if ((err = ERR_peek_error()) != 0x2004041UL) {
+ fprintf(stderr, "FAIL: ERR_peek_error() = %lx, want "
+ "0x2004041UL\n", err);
+ goto failure;
+ }
+ if ((err = ERR_peek_error_line(&file, &line)) != 0x2004041UL) {
+ fprintf(stderr, "FAIL: ERR_peek_error_line() = %lx, want "
+ "0x2004041\n", err);
+ goto failure;
+ }
+ if (strcmp(file, "sys.c") != 0) {
+ fprintf(stderr, "FAIL: got file '%s', want 'sys.c'", file);
+ goto failure;
+ }
+ if (line != 100) {
+ fprintf(stderr, "FAIL: line = %d, want 100", line);
+ goto failure;
+ }
+
+ if ((err = ERR_peek_last_error()) != 0x3073067UL) {
+ fprintf(stderr, "FAIL: ERR_peek_error() = %lx, want "
+ "0x3073067\n", err);
+ goto failure;
+ }
+ if ((err = ERR_peek_last_error_line(&file, &line)) != 0x3073067UL) {
+ fprintf(stderr, "FAIL: ERR_peek_last_error_line() = %lx, want "
+ "0x3073067\n", err);
+ goto failure;
+ }
+ if (strcmp(file, "bn.c") != 0) {
+ fprintf(stderr, "FAIL: got file '%s', want 'bn.c'", file);
+ goto failure;
+ }
+ if (line != 200) {
+ fprintf(stderr, "FAIL: line = %d, want 200", line);
+ goto failure;
+ }
+
+ if ((err = ERR_get_error()) != 0x2004041UL) {
+ fprintf(stderr, "FAIL: ERR_get_error() = %lx, want "
+ "0x2004041\n", err);
+ goto failure;
+ }
+
+ if ((err = ERR_peek_error()) != 0x3073067UL) {
+ fprintf(stderr, "FAIL: ERR_peek_error() = %lx, want "
+ "0x3073067\n", err);
+ goto failure;
+ }
+
+ if ((err = ERR_get_error_line(&file, &line)) != 0x3073067UL) {
+ fprintf(stderr, "FAIL: ERR_get_error_line() = %lx, want "
+ "0x3073067\n", err);
+ goto failure;
+ }
+ if (strcmp(file, "bn.c") != 0) {
+ fprintf(stderr, "FAIL: got file '%s', want 'bn.c'", file);
+ goto failure;
+ }
+ if (line != 200) {
+ fprintf(stderr, "FAIL: line = %d, want 200", line);
+ goto failure;
+ }
+
+ if ((err = ERR_get_error()) != 0) {
+ fprintf(stderr, "FAIL: ERR_get_error() = %lx, want "
+ "0x0\n", err);
+ goto failure;
+ }
+
+ ERR_clear_error();
+
+ s = ERR_lib_error_string(0x3fff067UL);
+ if (strcmp(s, "bignum routines") != 0) {
+ fprintf(stderr, "FAIL: ERR_lib_error_string() = '%s', "
+ "want 'bignum routines'\n", s);
+ goto failure;
+ }
+
+ s = ERR_func_error_string(0x3fff067UL);
+ if (strcmp(s, "CRYPTO_internal") != 0) {
+ fprintf(stderr, "FAIL: ERR_func_error_string() = '%s', "
+ "want 'CRYPTO_internal'\n", s);
+ goto failure;
+ }
+
+ s = ERR_reason_error_string(0x3fff067UL);
+ if (strcmp(s, "div by zero") != 0) {
+ fprintf(stderr, "FAIL: ERR_reason_error_string() = '%s', "
+ "want 'div by zero'\n", s);
+ goto failure;
+ }
+
+ ERR_remove_state(0);
+
+ s = ERR_error_string(0x3fff067UL, NULL);
+ if (strcmp(s, "error:03FFF067:bignum routines:CRYPTO_internal:div by zero") != 0) {
+ fprintf(stderr, "FAIL: ERR_error_string() = '%s', "
+ "want 'error:03FFF067:bignum routines:CRYPTO_internal:div by zero'\n", s);
+ goto failure;
+ }
+ memset(buf, 0xdb, sizeof(buf));
+ s = ERR_error_string(0x3fff067UL, buf);
+ if (s != buf) {
+ fprintf(stderr, "FAIL: ERR_error_string() did not "
+ "return buffer\n");
+ goto failure;
+ }
+ if (strcmp(s, "error:03FFF067:bignum routines:CRYPTO_internal:div by zero") != 0) {
+ fprintf(stderr, "FAIL: ERR_error_string() = '%s', "
+ "want 'error:03FFF067:bignum routines:CRYPTO_internal:div by zero'\n", s);
+ goto failure;
+ }
+
+ memset(buf, 0xdb, sizeof(buf));
+ ERR_error_string_n(0x3fff067UL, buf, sizeof(buf));
+ if (strcmp(s, "error:03FFF067:bignum routines:CRYPTO_internal:div by zero") != 0) {
+ fprintf(stderr, "FAIL: ERR_error_string() = '%s', "
+ "want 'error:03FFF067:bignum routines:CRYPTO_internal:div by zero'\n", s);
+ goto failure;
+ }
+
+ failed = 0;
+
+ failure:
+
+ return failed;
+}
+
+int
+main(int argc, char **argv)
+{
+ int failed = 0;
+
+ failed |= err_test();
+
+ /* Force a clean up. */
+ OPENSSL_cleanup();
+
+ return failed;
+}