From ae581a19fbe896a797450b9d9573fb66f2735227 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 16:37:38 +0200 Subject: Adding upstream version 1.9.13p3. Signed-off-by: Daniel Baumann --- lib/util/uuid.c | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 lib/util/uuid.c (limited to 'lib/util/uuid.c') diff --git a/lib/util/uuid.c b/lib/util/uuid.c new file mode 100644 index 0000000..77efdfe --- /dev/null +++ b/lib/util/uuid.c @@ -0,0 +1,99 @@ +/* + * SPDX-License-Identifier: ISC + * + * Copyright (c) 2020 Todd C. Miller + * + * 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. + */ + +/* + * This is an open source non-commercial project. Dear PVS-Studio, please check it. + * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com + */ + +#include + +#include +#if defined(HAVE_STDINT_H) +# include +#elif defined(HAVE_INTTYPES_H) +# include +#endif +#include +#include + +#include "sudo_compat.h" +#include "sudo_util.h" +#include "sudo_rand.h" + +struct uuid { + uint32_t time_low; + uint16_t time_mid; + uint16_t time_hi_and_version; + uint8_t clock_seq_hi_and_reserved; + uint8_t clock_seq_low; + uint8_t node[6]; +}; + +/* + * Create a type 4 (random), variant 1 universally unique identifier (UUID). + * As per RFC 4122 section 4.4. + */ +void +sudo_uuid_create_v1(unsigned char uuid_out[16]) +{ + struct uuid uuid; + + arc4random_buf(&uuid, sizeof(uuid)); + + /* Set version to 4 (random), 4 most significant bits (12-15) are 0010. */ + uuid.time_hi_and_version &= 0x0fff; + uuid.time_hi_and_version |= 0x4000; + + /* Set variant to 1: two most significant bits (6 and 7) are 01. */ + uuid.clock_seq_hi_and_reserved &= 0x3f; + uuid.clock_seq_hi_and_reserved |= 0x80; + + memcpy(uuid_out, &uuid, 16); +} + +/* + * Format a uuid as a 36-byte string (plus one for the NUL). + */ +char * +sudo_uuid_to_string_v1(unsigned char uuid[16], char *dst, size_t dstsiz) +{ + const char hex[] = "0123456789abcdef"; + char *cp = dst; + int i; + + if (dstsiz < sizeof("123e4567-e89b-12d3-a456-426655440000")) + return NULL; + + for (i = 0; i < 16; i++) { + *cp++ = hex[uuid[i] >> 4]; + *cp++ = hex[uuid[i] & 0x0f]; + + switch (i) { + case 4: + case 6: + case 8: + case 10: + *cp++ = '-'; + break; + } + } + *cp = '\0'; + + return dst; +} -- cgit v1.2.3