Add initial regress for the error stack and ERR_* APIs.

2 files changed, 210 insertions, 0 deletions

diff --git a/regress/lib/libcrypto/err/Makefile b/regress/lib/libcrypto/err/Makefile
new file mode 100644
index 00000000000..bfac64cc001
--- /dev/null
+++ b/regress/lib/libcrypto/err/Makefile
@@ -0,0 +1,9 @@
+#	$OpenBSD: Makefile,v 1.1 2024/10/02 14:41:46 jsing Exp $
+
+PROG =		err_test
+LDADD =		-lcrypto
+DPADD =		${LIBCRYPTO}
+WARNINGS =	Yes
+CFLAGS +=	-DLIBRESSL_INTERNAL -Werror
+
+.include <bsd.regress.mk>
diff --git a/regress/lib/libcrypto/err/err_test.c b/regress/lib/libcrypto/err/err_test.c
new file mode 100644
index 00000000000..16fd675e113
--- /dev/null
+++ b/regress/lib/libcrypto/err/err_test.c
@@ -0,0 +1,201 @@
+/* $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;
+}