diff options
| -rw-r--r-- | Libraries/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | Libraries/LibC/unistd.h | 8 | ||||
| -rw-r--r-- | Libraries/LibCrypt/CMakeLists.txt | 6 | ||||
| -rw-r--r-- | Libraries/LibCrypt/crypt.cpp | 78 |
4 files changed, 93 insertions, 0 deletions
diff --git a/Libraries/CMakeLists.txt b/Libraries/CMakeLists.txt index 41e3fedb56..1d460d9f84 100644 --- a/Libraries/CMakeLists.txt +++ b/Libraries/CMakeLists.txt @@ -1,6 +1,7 @@ add_subdirectory(LibAudio) add_subdirectory(LibC) add_subdirectory(LibCore) +add_subdirectory(LibCrypt) add_subdirectory(LibCrypto) add_subdirectory(LibDebug) add_subdirectory(LibDesktop) diff --git a/Libraries/LibC/unistd.h b/Libraries/LibC/unistd.h index ab6542b43f..93225ebb41 100644 --- a/Libraries/LibC/unistd.h +++ b/Libraries/LibC/unistd.h @@ -179,4 +179,12 @@ enum { }; long sysconf(int name); +struct crypt_data { + int initialized; + char result[65]; +}; + +char* crypt(const char* key, const char* salt); +char* crypt_r(const char* key, const char* salt, struct crypt_data* data); + __END_DECLS diff --git a/Libraries/LibCrypt/CMakeLists.txt b/Libraries/LibCrypt/CMakeLists.txt new file mode 100644 index 0000000000..f24d3f318a --- /dev/null +++ b/Libraries/LibCrypt/CMakeLists.txt @@ -0,0 +1,6 @@ +set(SOURCES + crypt.cpp +) + +serenity_libc(LibCrypt crypt) +target_link_libraries(LibCrypt LibC LibCrypto) diff --git a/Libraries/LibCrypt/crypt.cpp b/Libraries/LibCrypt/crypt.cpp new file mode 100644 index 0000000000..3431383fee --- /dev/null +++ b/Libraries/LibCrypt/crypt.cpp @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2020, Peter Elliott <pelliott@ualberta.ca> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include <AK/Base64.h> +#include <AK/Types.h> +#include <LibCrypto/Hash/SHA2.h> +#include <string.h> +#include <unistd.h> + +extern "C" { + +static struct crypt_data crypt_data; + +char* crypt(const char* key, const char* salt) +{ + crypt_data.initialized = true; + return crypt_r(key, salt, &crypt_data); +} + +static constexpr size_t crypt_salt_max = 16; +static constexpr size_t sha_string_length = 44; + +char* crypt_r(const char* key, const char* salt, struct crypt_data* data) +{ + if (!data->initialized) { + errno = EINVAL; + return nullptr; + } + + if (salt[0] == '$') { + if (salt[1] == '5') { + const char* salt_value = salt + 3; + size_t salt_len = min(strcspn(salt_value, "$"), crypt_salt_max); + size_t header_len = salt_len + 3; + + strncpy(data->result, salt, header_len); + data->result[header_len] = '$'; + + Crypto::Hash::SHA256 sha; + sha.update(key); + sha.update((const u8*)salt_value, salt_len); + + auto digest = sha.digest(); + auto string = encode_base64(ReadonlyBytes(digest.immutable_data(), digest.data_length())); + + strncpy(data->result + header_len + 1, string.characters(), sha_string_length); + + return data->result; + } + } + + // DES crypt is not available. + errno = EINVAL; + return nullptr; +} +} |