diff options
author | deshevoy <deshevoy@yandex-team.ru> | 2022-02-10 16:46:56 +0300 |
---|---|---|
committer | Daniil Cherednik <dcherednik@yandex-team.ru> | 2022-02-10 16:46:56 +0300 |
commit | e988f30484abe5fdeedcc7a5d3c226c01a21800c (patch) | |
tree | 0a217b173aabb57b7e51f8a169989b1a3e0309fe /contrib/libs/openssl/crypto/rand/randfile.c | |
parent | 33ee501c05d3f24036ae89766a858930ae66c548 (diff) | |
download | ydb-e988f30484abe5fdeedcc7a5d3c226c01a21800c.tar.gz |
Restoring authorship annotation for <deshevoy@yandex-team.ru>. Commit 1 of 2.
Diffstat (limited to 'contrib/libs/openssl/crypto/rand/randfile.c')
-rw-r--r-- | contrib/libs/openssl/crypto/rand/randfile.c | 622 |
1 files changed, 311 insertions, 311 deletions
diff --git a/contrib/libs/openssl/crypto/rand/randfile.c b/contrib/libs/openssl/crypto/rand/randfile.c index 229ce864a3..3a03f993c3 100644 --- a/contrib/libs/openssl/crypto/rand/randfile.c +++ b/contrib/libs/openssl/crypto/rand/randfile.c @@ -1,314 +1,314 @@ -/* +/* * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. - * - * Licensed under the OpenSSL license (the "License"). You may not use - * this file except in compliance with the License. You can obtain a copy - * in the file LICENSE in the source distribution or at - * https://www.openssl.org/source/license.html - */ - -#include "internal/cryptlib.h" - -#include <errno.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -#include <openssl/crypto.h> -#include <openssl/rand.h> -#include <openssl/rand_drbg.h> -#include <openssl/buffer.h> - -#ifdef OPENSSL_SYS_VMS -# include <unixio.h> -#endif -#include <sys/types.h> -#ifndef OPENSSL_NO_POSIX_IO -# include <sys/stat.h> -# include <fcntl.h> + * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html + */ + +#include "internal/cryptlib.h" + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <openssl/crypto.h> +#include <openssl/rand.h> +#include <openssl/rand_drbg.h> +#include <openssl/buffer.h> + +#ifdef OPENSSL_SYS_VMS +# include <unixio.h> +#endif +#include <sys/types.h> +#ifndef OPENSSL_NO_POSIX_IO +# include <sys/stat.h> +# include <fcntl.h> # if defined(_WIN32) && !defined(_WIN32_WCE) -# include <windows.h> -# include <io.h> -# define stat _stat -# define chmod _chmod -# define open _open -# define fdopen _fdopen -# define fstat _fstat -# define fileno _fileno -# endif -#endif - -/* - * Following should not be needed, and we could have been stricter - * and demand S_IS*. But some systems just don't comply... Formally - * below macros are "anatomically incorrect", because normally they - * would look like ((m) & MASK == TYPE), but since MASK availability - * is as questionable, we settle for this poor-man fallback... - */ -# if !defined(S_ISREG) -# define S_ISREG(m) ((m) & S_IFREG) -# endif - -#define RAND_BUF_SIZE 1024 -#define RFILE ".rnd" - -#ifdef OPENSSL_SYS_VMS -/* - * __FILE_ptr32 is a type provided by DEC C headers (types.h specifically) - * to make sure the FILE* is a 32-bit pointer no matter what. We know that - * stdio functions return this type (a study of stdio.h proves it). - * - * This declaration is a nasty hack to get around vms' extension to fopen for - * passing in sharing options being disabled by /STANDARD=ANSI89 - */ -static __FILE_ptr32 (*const vms_fopen)(const char *, const char *, ...) = - (__FILE_ptr32 (*)(const char *, const char *, ...))fopen; -# define VMS_OPEN_ATTRS \ - "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0" -# define openssl_fopen(fname, mode) vms_fopen((fname), (mode), VMS_OPEN_ATTRS) -#endif - -/* - * Note that these functions are intended for seed files only. Entropy - * devices and EGD sockets are handled in rand_unix.c If |bytes| is - * -1 read the complete file; otherwise read the specified amount. - */ -int RAND_load_file(const char *file, long bytes) -{ - /* - * The load buffer size exceeds the chunk size by the comfortable amount - * of 'RAND_DRBG_STRENGTH' bytes (not bits!). This is done on purpose - * to avoid calling RAND_add() with a small final chunk. Instead, such - * a small final chunk will be added together with the previous chunk - * (unless it's the only one). - */ -#define RAND_LOAD_BUF_SIZE (RAND_BUF_SIZE + RAND_DRBG_STRENGTH) - unsigned char buf[RAND_LOAD_BUF_SIZE]; - -#ifndef OPENSSL_NO_POSIX_IO - struct stat sb; -#endif - int i, n, ret = 0; - FILE *in; - - if (bytes == 0) - return 0; - - if ((in = openssl_fopen(file, "rb")) == NULL) { - RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_CANNOT_OPEN_FILE); - ERR_add_error_data(2, "Filename=", file); - return -1; - } - -#ifndef OPENSSL_NO_POSIX_IO - if (fstat(fileno(in), &sb) < 0) { - RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_INTERNAL_ERROR); - ERR_add_error_data(2, "Filename=", file); - fclose(in); - return -1; - } - - if (bytes < 0) { - if (S_ISREG(sb.st_mode)) - bytes = sb.st_size; - else - bytes = RAND_DRBG_STRENGTH; - } -#endif - /* - * On VMS, setbuf() will only take 32-bit pointers, and a compilation - * with /POINTER_SIZE=64 will give off a MAYLOSEDATA2 warning here. - * However, we trust that the C RTL will never give us a FILE pointer - * above the first 4 GB of memory, so we simply turn off the warning - * temporarily. - */ -#if defined(OPENSSL_SYS_VMS) && defined(__DECC) -# pragma environment save -# pragma message disable maylosedata2 -#endif - /* - * Don't buffer, because even if |file| is regular file, we have - * no control over the buffer, so why would we want a copy of its - * contents lying around? - */ - setbuf(in, NULL); -#if defined(OPENSSL_SYS_VMS) && defined(__DECC) -# pragma environment restore -#endif - - for ( ; ; ) { - if (bytes > 0) - n = (bytes <= RAND_LOAD_BUF_SIZE) ? (int)bytes : RAND_BUF_SIZE; - else - n = RAND_LOAD_BUF_SIZE; - i = fread(buf, 1, n, in); -#ifdef EINTR - if (ferror(in) && errno == EINTR){ - clearerr(in); - if (i == 0) - continue; - } -#endif - if (i == 0) - break; - - RAND_add(buf, i, (double)i); - ret += i; - - /* If given a bytecount, and we did it, break. */ - if (bytes > 0 && (bytes -= i) <= 0) - break; - } - - OPENSSL_cleanse(buf, sizeof(buf)); - fclose(in); - if (!RAND_status()) { - RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_RESEED_ERROR); - ERR_add_error_data(2, "Filename=", file); - return -1; - } - - return ret; -} - -int RAND_write_file(const char *file) -{ - unsigned char buf[RAND_BUF_SIZE]; - int ret = -1; - FILE *out = NULL; -#ifndef OPENSSL_NO_POSIX_IO - struct stat sb; - - if (stat(file, &sb) >= 0 && !S_ISREG(sb.st_mode)) { - RANDerr(RAND_F_RAND_WRITE_FILE, RAND_R_NOT_A_REGULAR_FILE); - ERR_add_error_data(2, "Filename=", file); - return -1; - } -#endif - - /* Collect enough random data. */ - if (RAND_priv_bytes(buf, (int)sizeof(buf)) != 1) - return -1; - -#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && \ - !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WINDOWS) - { -# ifndef O_BINARY -# define O_BINARY 0 -# endif - /* - * chmod(..., 0600) is too late to protect the file, permissions - * should be restrictive from the start - */ - int fd = open(file, O_WRONLY | O_CREAT | O_BINARY, 0600); - if (fd != -1) - out = fdopen(fd, "wb"); - } -#endif - -#ifdef OPENSSL_SYS_VMS - /* - * VMS NOTE: Prior versions of this routine created a _new_ version of - * the rand file for each call into this routine, then deleted all - * existing versions named ;-1, and finally renamed the current version - * as ';1'. Under concurrent usage, this resulted in an RMS race - * condition in rename() which could orphan files (see vms message help - * for RMS$_REENT). With the fopen() calls below, openssl/VMS now shares - * the top-level version of the rand file. Note that there may still be - * conditions where the top-level rand file is locked. If so, this code - * will then create a new version of the rand file. Without the delete - * and rename code, this can result in ascending file versions that stop - * at version 32767, and this routine will then return an error. The - * remedy for this is to recode the calling application to avoid - * concurrent use of the rand file, or synchronize usage at the - * application level. Also consider whether or not you NEED a persistent - * rand file in a concurrent use situation. - */ - out = openssl_fopen(file, "rb+"); -#endif - - if (out == NULL) - out = openssl_fopen(file, "wb"); - if (out == NULL) { - RANDerr(RAND_F_RAND_WRITE_FILE, RAND_R_CANNOT_OPEN_FILE); - ERR_add_error_data(2, "Filename=", file); - return -1; - } - -#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO) - /* - * Yes it's late to do this (see above comment), but better than nothing. - */ - chmod(file, 0600); -#endif - - ret = fwrite(buf, 1, RAND_BUF_SIZE, out); - fclose(out); - OPENSSL_cleanse(buf, RAND_BUF_SIZE); - return ret; -} - -const char *RAND_file_name(char *buf, size_t size) -{ - char *s = NULL; - size_t len; - int use_randfile = 1; - +# include <windows.h> +# include <io.h> +# define stat _stat +# define chmod _chmod +# define open _open +# define fdopen _fdopen +# define fstat _fstat +# define fileno _fileno +# endif +#endif + +/* + * Following should not be needed, and we could have been stricter + * and demand S_IS*. But some systems just don't comply... Formally + * below macros are "anatomically incorrect", because normally they + * would look like ((m) & MASK == TYPE), but since MASK availability + * is as questionable, we settle for this poor-man fallback... + */ +# if !defined(S_ISREG) +# define S_ISREG(m) ((m) & S_IFREG) +# endif + +#define RAND_BUF_SIZE 1024 +#define RFILE ".rnd" + +#ifdef OPENSSL_SYS_VMS +/* + * __FILE_ptr32 is a type provided by DEC C headers (types.h specifically) + * to make sure the FILE* is a 32-bit pointer no matter what. We know that + * stdio functions return this type (a study of stdio.h proves it). + * + * This declaration is a nasty hack to get around vms' extension to fopen for + * passing in sharing options being disabled by /STANDARD=ANSI89 + */ +static __FILE_ptr32 (*const vms_fopen)(const char *, const char *, ...) = + (__FILE_ptr32 (*)(const char *, const char *, ...))fopen; +# define VMS_OPEN_ATTRS \ + "shr=get,put,upd,del","ctx=bin,stm","rfm=stm","rat=none","mrs=0" +# define openssl_fopen(fname, mode) vms_fopen((fname), (mode), VMS_OPEN_ATTRS) +#endif + +/* + * Note that these functions are intended for seed files only. Entropy + * devices and EGD sockets are handled in rand_unix.c If |bytes| is + * -1 read the complete file; otherwise read the specified amount. + */ +int RAND_load_file(const char *file, long bytes) +{ + /* + * The load buffer size exceeds the chunk size by the comfortable amount + * of 'RAND_DRBG_STRENGTH' bytes (not bits!). This is done on purpose + * to avoid calling RAND_add() with a small final chunk. Instead, such + * a small final chunk will be added together with the previous chunk + * (unless it's the only one). + */ +#define RAND_LOAD_BUF_SIZE (RAND_BUF_SIZE + RAND_DRBG_STRENGTH) + unsigned char buf[RAND_LOAD_BUF_SIZE]; + +#ifndef OPENSSL_NO_POSIX_IO + struct stat sb; +#endif + int i, n, ret = 0; + FILE *in; + + if (bytes == 0) + return 0; + + if ((in = openssl_fopen(file, "rb")) == NULL) { + RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_CANNOT_OPEN_FILE); + ERR_add_error_data(2, "Filename=", file); + return -1; + } + +#ifndef OPENSSL_NO_POSIX_IO + if (fstat(fileno(in), &sb) < 0) { + RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_INTERNAL_ERROR); + ERR_add_error_data(2, "Filename=", file); + fclose(in); + return -1; + } + + if (bytes < 0) { + if (S_ISREG(sb.st_mode)) + bytes = sb.st_size; + else + bytes = RAND_DRBG_STRENGTH; + } +#endif + /* + * On VMS, setbuf() will only take 32-bit pointers, and a compilation + * with /POINTER_SIZE=64 will give off a MAYLOSEDATA2 warning here. + * However, we trust that the C RTL will never give us a FILE pointer + * above the first 4 GB of memory, so we simply turn off the warning + * temporarily. + */ +#if defined(OPENSSL_SYS_VMS) && defined(__DECC) +# pragma environment save +# pragma message disable maylosedata2 +#endif + /* + * Don't buffer, because even if |file| is regular file, we have + * no control over the buffer, so why would we want a copy of its + * contents lying around? + */ + setbuf(in, NULL); +#if defined(OPENSSL_SYS_VMS) && defined(__DECC) +# pragma environment restore +#endif + + for ( ; ; ) { + if (bytes > 0) + n = (bytes <= RAND_LOAD_BUF_SIZE) ? (int)bytes : RAND_BUF_SIZE; + else + n = RAND_LOAD_BUF_SIZE; + i = fread(buf, 1, n, in); +#ifdef EINTR + if (ferror(in) && errno == EINTR){ + clearerr(in); + if (i == 0) + continue; + } +#endif + if (i == 0) + break; + + RAND_add(buf, i, (double)i); + ret += i; + + /* If given a bytecount, and we did it, break. */ + if (bytes > 0 && (bytes -= i) <= 0) + break; + } + + OPENSSL_cleanse(buf, sizeof(buf)); + fclose(in); + if (!RAND_status()) { + RANDerr(RAND_F_RAND_LOAD_FILE, RAND_R_RESEED_ERROR); + ERR_add_error_data(2, "Filename=", file); + return -1; + } + + return ret; +} + +int RAND_write_file(const char *file) +{ + unsigned char buf[RAND_BUF_SIZE]; + int ret = -1; + FILE *out = NULL; +#ifndef OPENSSL_NO_POSIX_IO + struct stat sb; + + if (stat(file, &sb) >= 0 && !S_ISREG(sb.st_mode)) { + RANDerr(RAND_F_RAND_WRITE_FILE, RAND_R_NOT_A_REGULAR_FILE); + ERR_add_error_data(2, "Filename=", file); + return -1; + } +#endif + + /* Collect enough random data. */ + if (RAND_priv_bytes(buf, (int)sizeof(buf)) != 1) + return -1; + +#if defined(O_CREAT) && !defined(OPENSSL_NO_POSIX_IO) && \ + !defined(OPENSSL_SYS_VMS) && !defined(OPENSSL_SYS_WINDOWS) + { +# ifndef O_BINARY +# define O_BINARY 0 +# endif + /* + * chmod(..., 0600) is too late to protect the file, permissions + * should be restrictive from the start + */ + int fd = open(file, O_WRONLY | O_CREAT | O_BINARY, 0600); + if (fd != -1) + out = fdopen(fd, "wb"); + } +#endif + +#ifdef OPENSSL_SYS_VMS + /* + * VMS NOTE: Prior versions of this routine created a _new_ version of + * the rand file for each call into this routine, then deleted all + * existing versions named ;-1, and finally renamed the current version + * as ';1'. Under concurrent usage, this resulted in an RMS race + * condition in rename() which could orphan files (see vms message help + * for RMS$_REENT). With the fopen() calls below, openssl/VMS now shares + * the top-level version of the rand file. Note that there may still be + * conditions where the top-level rand file is locked. If so, this code + * will then create a new version of the rand file. Without the delete + * and rename code, this can result in ascending file versions that stop + * at version 32767, and this routine will then return an error. The + * remedy for this is to recode the calling application to avoid + * concurrent use of the rand file, or synchronize usage at the + * application level. Also consider whether or not you NEED a persistent + * rand file in a concurrent use situation. + */ + out = openssl_fopen(file, "rb+"); +#endif + + if (out == NULL) + out = openssl_fopen(file, "wb"); + if (out == NULL) { + RANDerr(RAND_F_RAND_WRITE_FILE, RAND_R_CANNOT_OPEN_FILE); + ERR_add_error_data(2, "Filename=", file); + return -1; + } + +#if !defined(NO_CHMOD) && !defined(OPENSSL_NO_POSIX_IO) + /* + * Yes it's late to do this (see above comment), but better than nothing. + */ + chmod(file, 0600); +#endif + + ret = fwrite(buf, 1, RAND_BUF_SIZE, out); + fclose(out); + OPENSSL_cleanse(buf, RAND_BUF_SIZE); + return ret; +} + +const char *RAND_file_name(char *buf, size_t size) +{ + char *s = NULL; + size_t len; + int use_randfile = 1; + #if defined(_WIN32) && defined(CP_UTF8) && !defined(_WIN32_WCE) - DWORD envlen; - WCHAR *var; - - /* Look up various environment variables. */ - if ((envlen = GetEnvironmentVariableW(var = L"RANDFILE", NULL, 0)) == 0) { - use_randfile = 0; - if ((envlen = GetEnvironmentVariableW(var = L"HOME", NULL, 0)) == 0 - && (envlen = GetEnvironmentVariableW(var = L"USERPROFILE", - NULL, 0)) == 0) - envlen = GetEnvironmentVariableW(var = L"SYSTEMROOT", NULL, 0); - } - - /* If we got a value, allocate space to hold it and then get it. */ - if (envlen != 0) { - int sz; - WCHAR *val = _alloca(envlen * sizeof(WCHAR)); - - if (GetEnvironmentVariableW(var, val, envlen) < envlen - && (sz = WideCharToMultiByte(CP_UTF8, 0, val, -1, NULL, 0, - NULL, NULL)) != 0) { - s = _alloca(sz); - if (WideCharToMultiByte(CP_UTF8, 0, val, -1, s, sz, - NULL, NULL) == 0) - s = NULL; - } - } -#else - if ((s = ossl_safe_getenv("RANDFILE")) == NULL || *s == '\0') { - use_randfile = 0; - s = ossl_safe_getenv("HOME"); - } -#endif - -#ifdef DEFAULT_HOME - if (!use_randfile && s == NULL) - s = DEFAULT_HOME; -#endif - if (s == NULL || *s == '\0') - return NULL; - - len = strlen(s); - if (use_randfile) { - if (len + 1 >= size) - return NULL; - strcpy(buf, s); - } else { - if (len + 1 + strlen(RFILE) + 1 >= size) - return NULL; - strcpy(buf, s); -#ifndef OPENSSL_SYS_VMS - strcat(buf, "/"); -#endif - strcat(buf, RFILE); - } - - return buf; -} + DWORD envlen; + WCHAR *var; + + /* Look up various environment variables. */ + if ((envlen = GetEnvironmentVariableW(var = L"RANDFILE", NULL, 0)) == 0) { + use_randfile = 0; + if ((envlen = GetEnvironmentVariableW(var = L"HOME", NULL, 0)) == 0 + && (envlen = GetEnvironmentVariableW(var = L"USERPROFILE", + NULL, 0)) == 0) + envlen = GetEnvironmentVariableW(var = L"SYSTEMROOT", NULL, 0); + } + + /* If we got a value, allocate space to hold it and then get it. */ + if (envlen != 0) { + int sz; + WCHAR *val = _alloca(envlen * sizeof(WCHAR)); + + if (GetEnvironmentVariableW(var, val, envlen) < envlen + && (sz = WideCharToMultiByte(CP_UTF8, 0, val, -1, NULL, 0, + NULL, NULL)) != 0) { + s = _alloca(sz); + if (WideCharToMultiByte(CP_UTF8, 0, val, -1, s, sz, + NULL, NULL) == 0) + s = NULL; + } + } +#else + if ((s = ossl_safe_getenv("RANDFILE")) == NULL || *s == '\0') { + use_randfile = 0; + s = ossl_safe_getenv("HOME"); + } +#endif + +#ifdef DEFAULT_HOME + if (!use_randfile && s == NULL) + s = DEFAULT_HOME; +#endif + if (s == NULL || *s == '\0') + return NULL; + + len = strlen(s); + if (use_randfile) { + if (len + 1 >= size) + return NULL; + strcpy(buf, s); + } else { + if (len + 1 + strlen(RFILE) + 1 >= size) + return NULL; + strcpy(buf, s); +#ifndef OPENSSL_SYS_VMS + strcat(buf, "/"); +#endif + strcat(buf, RFILE); + } + + return buf; +} |