// SPDX-License-Identifier: GPL-2.0 /* * Copyright (C) 2020-2024 Microsoft Corporation. All rights reserved. */ #include #include #include #include #include static void usage(const char *const name) { printf("Usage: %s OutputFile (PolicyFile)\n", name); exit(EINVAL); } static int policy_to_buffer(const char *pathname, char **buffer, size_t *size) { size_t fsize; size_t read; char *lbuf; int rc = 0; FILE *fd; fd = fopen(pathname, "r"); if (!fd) { rc = errno; goto out; } fseek(fd, 0, SEEK_END); fsize = ftell(fd); rewind(fd); lbuf = malloc(fsize); if (!lbuf) { rc = ENOMEM; goto out_close; } read = fread((void *)lbuf, sizeof(*lbuf), fsize, fd); if (read != fsize) { rc = -1; goto out_free; } *buffer = lbuf; *size = fsize; fclose(fd); return rc; out_free: free(lbuf); out_close: fclose(fd); out: return rc; } static int write_boot_policy(const char *pathname, const char *buf, size_t size) { FILE *fd; size_t i; fd = fopen(pathname, "w"); if (!fd) return errno; fprintf(fd, "/* This file is automatically generated."); fprintf(fd, " Do not edit. */\n"); fprintf(fd, "#include \n"); fprintf(fd, "\nextern const char *const ipe_boot_policy;\n\n"); fprintf(fd, "const char *const ipe_boot_policy =\n"); if (!buf || size == 0) { fprintf(fd, "\tNULL;\n"); fclose(fd); return 0; } fprintf(fd, "\t\""); for (i = 0; i < size; ++i) { switch (buf[i]) { case '"': fprintf(fd, "\\\""); break; case '\'': fprintf(fd, "'"); break; case '\n': fprintf(fd, "\\n\"\n\t\""); break; case '\\': fprintf(fd, "\\\\"); break; case '\t': fprintf(fd, "\\t"); break; case '\?': fprintf(fd, "\\?"); break; default: fprintf(fd, "%c", buf[i]); } } fprintf(fd, "\";\n"); fclose(fd); return 0; } int main(int argc, const char *const argv[]) { char *policy = NULL; size_t len = 0; int rc = 0; if (argc < 2) usage(argv[0]); if (argc > 2) { rc = policy_to_buffer(argv[2], &policy, &len); if (rc != 0) goto cleanup; } rc = write_boot_policy(argv[1], policy, len); cleanup: if (policy) free(policy); if (rc != 0) perror("An error occurred during policy conversion: "); return rc; }