Added submodule contents into tree

externals/mbedtls/programs/hash/generic_sum.c

@@ -0,0 +1,209 @@
+/*
+ *  generic message digest layer demonstration program
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/platform.h"
+
+#if defined(MBEDTLS_MD_C) && defined(MBEDTLS_FS_IO)
+#include "mbedtls/md.h"
+
+#include <stdio.h>
+#include <string.h>
+#endif
+
+#if !defined(MBEDTLS_MD_C) || !defined(MBEDTLS_FS_IO)
+int main(void)
+{
+    mbedtls_printf("MBEDTLS_MD_C and/or MBEDTLS_FS_IO not defined.\n");
+    mbedtls_exit(0);
+}
+#else
+
+
+static int generic_wrapper(const mbedtls_md_info_t *md_info, char *filename, unsigned char *sum)
+{
+    int ret = mbedtls_md_file(md_info, filename, sum);
+
+    if (ret == 1) {
+        mbedtls_fprintf(stderr, "failed to open: %s\n", filename);
+    }
+
+    if (ret == 2) {
+        mbedtls_fprintf(stderr, "failed to read: %s\n", filename);
+    }
+
+    return ret;
+}
+
+static int generic_print(const mbedtls_md_info_t *md_info, char *filename)
+{
+    int i;
+    unsigned char sum[MBEDTLS_MD_MAX_SIZE];
+
+    if (generic_wrapper(md_info, filename, sum) != 0) {
+        return 1;
+    }
+
+    for (i = 0; i < mbedtls_md_get_size(md_info); i++) {
+        mbedtls_printf("%02x", sum[i]);
+    }
+
+    mbedtls_printf("  %s\n", filename);
+    return 0;
+}
+
+static int generic_check(const mbedtls_md_info_t *md_info, char *filename)
+{
+    int i;
+    size_t n;
+    FILE *f;
+    int nb_err1, nb_err2;
+    int nb_tot1, nb_tot2;
+    unsigned char sum[MBEDTLS_MD_MAX_SIZE];
+    char line[1024];
+    char diff;
+#if defined(__clang_analyzer__)
+    char buf[MBEDTLS_MD_MAX_SIZE * 2 + 1] = { };
+#else
+    char buf[MBEDTLS_MD_MAX_SIZE * 2 + 1];
+#endif
+
+    if ((f = fopen(filename, "rb")) == NULL) {
+        mbedtls_printf("failed to open: %s\n", filename);
+        return 1;
+    }
+
+    nb_err1 = nb_err2 = 0;
+    nb_tot1 = nb_tot2 = 0;
+
+    memset(line, 0, sizeof(line));
+
+    n = sizeof(line);
+
+    while (fgets(line, (int) n - 1, f) != NULL) {
+        n = strlen(line);
+
+        if (n < (size_t) 2 * mbedtls_md_get_size(md_info) + 4) {
+            mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name(md_info));
+            continue;
+        }
+
+        if (line[2 * mbedtls_md_get_size(md_info)] != ' ' ||
+            line[2 * mbedtls_md_get_size(md_info) + 1] != ' ') {
+            mbedtls_printf("No '%s' hash found on line.\n", mbedtls_md_get_name(md_info));
+            continue;
+        }
+
+        if (line[n - 1] == '\n') {
+            n--; line[n] = '\0';
+        }
+        if (line[n - 1] == '\r') {
+            n--; line[n] = '\0';
+        }
+
+        nb_tot1++;
+
+        if (generic_wrapper(md_info, line + 2 + 2 * mbedtls_md_get_size(md_info), sum) != 0) {
+            nb_err1++;
+            continue;
+        }
+
+        nb_tot2++;
+
+        for (i = 0; i < mbedtls_md_get_size(md_info); i++) {
+            sprintf(buf + i * 2, "%02x", sum[i]);
+        }
+
+        /* Use constant-time buffer comparison */
+        diff = 0;
+        for (i = 0; i < 2 * mbedtls_md_get_size(md_info); i++) {
+            diff |= line[i] ^ buf[i];
+        }
+
+        if (diff != 0) {
+            nb_err2++;
+            mbedtls_fprintf(stderr, "wrong checksum: %s\n", line + 66);
+        }
+
+        n = sizeof(line);
+    }
+
+    if (nb_err1 != 0) {
+        mbedtls_printf("WARNING: %d (out of %d) input files could "
+                       "not be read\n", nb_err1, nb_tot1);
+    }
+
+    if (nb_err2 != 0) {
+        mbedtls_printf("WARNING: %d (out of %d) computed checksums did "
+                       "not match\n", nb_err2, nb_tot2);
+    }
+
+    fclose(f);
+
+    return nb_err1 != 0 || nb_err2 != 0;
+}
+
+int main(int argc, char *argv[])
+{
+    int ret = 1, i;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
+    const mbedtls_md_info_t *md_info;
+    mbedtls_md_context_t md_ctx;
+
+    mbedtls_md_init(&md_ctx);
+
+    if (argc < 2) {
+        const int *list;
+
+        mbedtls_printf("print mode:  generic_sum <mbedtls_md> <file> <file> ...\n");
+        mbedtls_printf("check mode:  generic_sum <mbedtls_md> -c <checksum file>\n");
+
+        mbedtls_printf("\nAvailable message digests:\n");
+        list = mbedtls_md_list();
+        while (*list) {
+            md_info = mbedtls_md_info_from_type(*list);
+            mbedtls_printf("  %s\n", mbedtls_md_get_name(md_info));
+            list++;
+        }
+
+        mbedtls_exit(exit_code);
+    }
+
+    /*
+     * Read the MD from the command line
+     */
+    md_info = mbedtls_md_info_from_string(argv[1]);
+    if (md_info == NULL) {
+        mbedtls_fprintf(stderr, "Message Digest '%s' not found\n", argv[1]);
+        mbedtls_exit(exit_code);
+    }
+    if (mbedtls_md_setup(&md_ctx, md_info, 0)) {
+        mbedtls_fprintf(stderr, "Failed to initialize context.\n");
+        mbedtls_exit(exit_code);
+    }
+
+    ret = 0;
+    if (argc == 4 && strcmp("-c", argv[2]) == 0) {
+        ret |= generic_check(md_info, argv[3]);
+        goto exit;
+    }
+
+    for (i = 2; i < argc; i++) {
+        ret |= generic_print(md_info, argv[i]);
+    }
+
+    if (ret == 0) {
+        exit_code = MBEDTLS_EXIT_SUCCESS;
+    }
+
+exit:
+    mbedtls_md_free(&md_ctx);
+
+    mbedtls_exit(exit_code);
+}
+#endif /* MBEDTLS_MD_C && MBEDTLS_FS_IO */