/* * Copyright (c) 2019-2020 Adubbz, Atmosphère-NX * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <stratosphere.hpp> namespace ams::ncm { namespace { void GetStringFromBytes(char *dst, const void *src, size_t count) { for (size_t i = 0; i < count; i++) { std::snprintf(dst + 2 * i, 3, "%02x", static_cast<const u8 *>(src)[i]); } } bool GetBytesFromString(void *dst, size_t dst_size, const char *src, size_t src_size) { /* Each byte is comprised of hex characters. */ if (!util::IsAligned(src_size, 2) || (dst_size * 2 < src_size)) { return false; } /* Convert each character pair to a byte until we reach the end. */ for (size_t i = 0; i < src_size; i += 2) { char tmp[3]; strlcpy(tmp, src + i, sizeof(tmp)); char *err = nullptr; reinterpret_cast<u8 *>(dst)[i / 2] = static_cast<u8>(std::strtoul(tmp, std::addressof(err), 16)); if (*err != '\x00') { return false; } } return true; } } ContentIdString GetContentIdString(ContentId id) { ContentIdString str; GetStringFromContentId(str.data, sizeof(str), id); return str; } void GetStringFromContentId(char *dst, size_t dst_size, ContentId id) { AMS_ABORT_UNLESS(dst_size > ContentIdStringLength); GetStringFromBytes(dst, std::addressof(id), sizeof(id)); } void GetStringFromRightsId(char *dst, size_t dst_size, fs::RightsId id) { AMS_ABORT_UNLESS(dst_size > RightsIdStringLength); GetStringFromBytes(dst, std::addressof(id), sizeof(id)); } void GetTicketFileStringFromRightsId(char *dst, size_t dst_size, fs::RightsId id) { AMS_ABORT_UNLESS(dst_size > TicketFileStringLength); ContentIdString str; GetStringFromRightsId(str.data, sizeof(str), id); std::snprintf(dst, dst_size, "%s.tik", str.data); } void GetCertificateFileStringFromRightsId(char *dst, size_t dst_size, fs::RightsId id) { AMS_ABORT_UNLESS(dst_size > CertFileStringLength); ContentIdString str; GetStringFromRightsId(str.data, sizeof(str), id); std::snprintf(dst, dst_size, "%s.cert", str.data); } std::optional<ContentId> GetContentIdFromString(const char *str, size_t len) { if (len < ContentIdStringLength) { return std::nullopt; } ContentId content_id; return GetBytesFromString(std::addressof(content_id), sizeof(content_id), str, ContentIdStringLength) ? std::optional<ContentId>(content_id) : std::nullopt; } }