include/internal/common.h

   1 /*
   2  * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #ifndef OSSL_INTERNAL_COMMON_H
  11 # define OSSL_INTERNAL_COMMON_H
  12 # pragma once
  13
  14 # include <stdlib.h>
  15 # include <string.h>
  16 # include "openssl/configuration.h"
  17
  18 # include "internal/e_os.h" /* ossl_inline in many files */
  19 # include "internal/nelem.h"
  20
  21 # if defined(__GNUC__) || defined(__clang__)
  22 #  define likely(x)     __builtin_expect(!!(x), 1)
  23 #  define unlikely(x)   __builtin_expect(!!(x), 0)
  24 # else
  25 #  define likely(x)     x
  26 #  define unlikely(x)   x
  27 # endif
  28
  29 # if defined(__GNUC__) || defined(__clang__)
  30 #  define ALIGN32       __attribute((aligned(32)))
  31 #  define ALIGN64       __attribute((aligned(64)))
  32 # elif defined(_MSC_VER)
  33 #  define ALIGN32       __declspec(align(32))
  34 #  define ALIGN64       __declspec(align(64))
  35 # else
  36 #  define ALIGN32
  37 #  define ALIGN64
  38 # endif
  39
  40 # ifdef NDEBUG
  41 #  define ossl_assert(x) ((x) != 0)
  42 # else
  43 __owur static ossl_inline int ossl_assert_int(int expr, const char *exprstr,
  44                                               const char *file, int line)
  45 {
  46     if (!expr)
  47         OPENSSL_die(exprstr, file, line);
  48
  49     return expr;
  50 }
  51
  52 #  define ossl_assert(x) ossl_assert_int((x) != 0, "Assertion failed: "#x, \
  53                                          __FILE__, __LINE__)
  54
  55 # endif
  56
  57 /* Check if |pre|, which must be a string literal, is a prefix of |str| */
  58 #define HAS_PREFIX(str, pre) (strncmp(str, pre "", sizeof(pre) - 1) == 0)
  59 /* As before, and if check succeeds, advance |str| past the prefix |pre| */
  60 #define CHECK_AND_SKIP_PREFIX(str, pre) \
  61     (HAS_PREFIX(str, pre) ? ((str) += sizeof(pre) - 1, 1) : 0)
  62 /* Check if the string literal |p| is a case-insensitive prefix of |s| */
  63 #define HAS_CASE_PREFIX(s, p) (OPENSSL_strncasecmp(s, p "", sizeof(p) - 1) == 0)
  64 /* As before, and if check succeeds, advance |str| past the prefix |pre| */
  65 #define CHECK_AND_SKIP_CASE_PREFIX(str, pre) \
  66     (HAS_CASE_PREFIX(str, pre) ? ((str) += sizeof(pre) - 1, 1) : 0)
  67 /* Check if the string literal |suffix| is a case-insensitive suffix of |str| */
  68 #define HAS_CASE_SUFFIX(str, suffix) (strlen(str) < sizeof(suffix) - 1 ? 0 : \
  69     OPENSSL_strcasecmp(str + strlen(str) - sizeof(suffix) + 1, suffix "") == 0)
  70
  71 /*
  72  * Use this inside a union with the field that needs to be aligned to a
  73  * reasonable boundary for the platform.  The most pessimistic alignment
  74  * of the listed types will be used by the compiler.
  75  */
  76 # define OSSL_UNION_ALIGN       \
  77     double align;               \
  78     ossl_uintmax_t align_int;   \
  79     void *align_ptr
  80
  81 # define OPENSSL_CONF             "openssl.cnf"
  82
  83 # ifndef OPENSSL_SYS_VMS
  84 #  define X509_CERT_AREA          OPENSSLDIR
  85 #  define X509_CERT_DIR           OPENSSLDIR "/certs"
  86 #  define X509_CERT_FILE          OPENSSLDIR "/cert.pem"
  87 #  define X509_PRIVATE_DIR        OPENSSLDIR "/private"
  88 #  define CTLOG_FILE              OPENSSLDIR "/ct_log_list.cnf"
  89 # else
  90 #  define X509_CERT_AREA          "OSSL$DATAROOT:[000000]"
  91 #  define X509_CERT_DIR           "OSSL$DATAROOT:[CERTS]"
  92 #  define X509_CERT_FILE          "OSSL$DATAROOT:[000000]cert.pem"
  93 #  define X509_PRIVATE_DIR        "OSSL$DATAROOT:[PRIVATE]"
  94 #  define CTLOG_FILE              "OSSL$DATAROOT:[000000]ct_log_list.cnf"
  95 # endif
  96
  97 # define X509_CERT_DIR_EVP        "SSL_CERT_DIR"
  98 # define X509_CERT_FILE_EVP       "SSL_CERT_FILE"
  99 # define CTLOG_FILE_EVP           "CTLOG_FILE"
 100
 101 /* size of string representations */
 102 # define DECIMAL_SIZE(type)      ((sizeof(type)*8+2)/3+1)
 103 # define HEX_SIZE(type)          (sizeof(type)*2)
 104
 105 # define c2l(c,l)        (l = ((unsigned long)(*((c)++)))     , \
 106                          l|=(((unsigned long)(*((c)++)))<< 8), \
 107                          l|=(((unsigned long)(*((c)++)))<<16), \
 108                          l|=(((unsigned long)(*((c)++)))<<24))
 109
 110 /* NOTE - c is not incremented as per c2l */
 111 # define c2ln(c,l1,l2,n) { \
 112                         c+=n; \
 113                         l1=l2=0; \
 114                         switch (n) { \
 115                         case 8: l2 =((unsigned long)(*(--(c))))<<24; \
 116                         case 7: l2|=((unsigned long)(*(--(c))))<<16; \
 117                         case 6: l2|=((unsigned long)(*(--(c))))<< 8; \
 118                         case 5: l2|=((unsigned long)(*(--(c))));     \
 119                         case 4: l1 =((unsigned long)(*(--(c))))<<24; \
 120                         case 3: l1|=((unsigned long)(*(--(c))))<<16; \
 121                         case 2: l1|=((unsigned long)(*(--(c))))<< 8; \
 122                         case 1: l1|=((unsigned long)(*(--(c))));     \
 123                                 } \
 124                         }
 125
 126 # define l2c(l,c)        (*((c)++)=(unsigned char)(((l)    )&0xff), \
 127                          *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 128                          *((c)++)=(unsigned char)(((l)>>16)&0xff), \
 129                          *((c)++)=(unsigned char)(((l)>>24)&0xff))
 130
 131 # define n2l(c,l)        (l =((unsigned long)(*((c)++)))<<24, \
 132                          l|=((unsigned long)(*((c)++)))<<16, \
 133                          l|=((unsigned long)(*((c)++)))<< 8, \
 134                          l|=((unsigned long)(*((c)++))))
 135
 136 # define n2l8(c,l)       (l =((uint64_t)(*((c)++)))<<56, \
 137                          l|=((uint64_t)(*((c)++)))<<48, \
 138                          l|=((uint64_t)(*((c)++)))<<40, \
 139                          l|=((uint64_t)(*((c)++)))<<32, \
 140                          l|=((uint64_t)(*((c)++)))<<24, \
 141                          l|=((uint64_t)(*((c)++)))<<16, \
 142                          l|=((uint64_t)(*((c)++)))<< 8, \
 143                          l|=((uint64_t)(*((c)++))))
 144
 145 # define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24)&0xff), \
 146                          *((c)++)=(unsigned char)(((l)>>16)&0xff), \
 147                          *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 148                          *((c)++)=(unsigned char)(((l)    )&0xff))
 149
 150 # define l2n8(l,c)       (*((c)++)=(unsigned char)(((l)>>56)&0xff), \
 151                          *((c)++)=(unsigned char)(((l)>>48)&0xff), \
 152                          *((c)++)=(unsigned char)(((l)>>40)&0xff), \
 153                          *((c)++)=(unsigned char)(((l)>>32)&0xff), \
 154                          *((c)++)=(unsigned char)(((l)>>24)&0xff), \
 155                          *((c)++)=(unsigned char)(((l)>>16)&0xff), \
 156                          *((c)++)=(unsigned char)(((l)>> 8)&0xff), \
 157                          *((c)++)=(unsigned char)(((l)    )&0xff))
 158
 159 /* NOTE - c is not incremented as per l2c */
 160 # define l2cn(l1,l2,c,n) { \
 161                         c+=n; \
 162                         switch (n) { \
 163                         case 8: *(--(c))=(unsigned char)(((l2)>>24)&0xff); \
 164                         case 7: *(--(c))=(unsigned char)(((l2)>>16)&0xff); \
 165                         case 6: *(--(c))=(unsigned char)(((l2)>> 8)&0xff); \
 166                         case 5: *(--(c))=(unsigned char)(((l2)    )&0xff); \
 167                         case 4: *(--(c))=(unsigned char)(((l1)>>24)&0xff); \
 168                         case 3: *(--(c))=(unsigned char)(((l1)>>16)&0xff); \
 169                         case 2: *(--(c))=(unsigned char)(((l1)>> 8)&0xff); \
 170                         case 1: *(--(c))=(unsigned char)(((l1)    )&0xff); \
 171                                 } \
 172                         }
 173
 174 # define n2s(c,s)        ((s=(((unsigned int)((c)[0]))<< 8)| \
 175                              (((unsigned int)((c)[1]))    )),(c)+=2)
 176 # define s2n(s,c)        (((c)[0]=(unsigned char)(((s)>> 8)&0xff), \
 177                            (c)[1]=(unsigned char)(((s)    )&0xff)),(c)+=2)
 178
 179 # define n2l3(c,l)       ((l =(((unsigned long)((c)[0]))<<16)| \
 180                               (((unsigned long)((c)[1]))<< 8)| \
 181                               (((unsigned long)((c)[2]))    )),(c)+=3)
 182
 183 # define l2n3(l,c)       (((c)[0]=(unsigned char)(((l)>>16)&0xff), \
 184                            (c)[1]=(unsigned char)(((l)>> 8)&0xff), \
 185                            (c)[2]=(unsigned char)(((l)    )&0xff)),(c)+=3)
 186
 187 static ossl_inline int ossl_ends_with_dirsep(const char *path)
 188 {
 189     if (*path != '\0')
 190         path += strlen(path) - 1;
 191 # if defined __VMS
 192     if (*path == ']' || *path == '>' || *path == ':')
 193         return 1;
 194 # elif defined _WIN32
 195     if (*path == '\\')
 196         return 1;
 197 # endif
 198     return *path == '/';
 199 }
 200
 201 static ossl_inline int ossl_is_absolute_path(const char *path)
 202 {
 203 # if defined __VMS
 204     if (strchr(path, ':') != NULL
 205         || ((path[0] == '[' || path[0] == '<')
 206             && path[1] != '.' && path[1] != '-'
 207             && path[1] != ']' && path[1] != '>'))
 208         return 1;
 209 # elif defined _WIN32
 210     if (path[0] == '\\'
 211         || (path[0] != '\0' && path[1] == ':'))
 212         return 1;
 213 # endif
 214     return path[0] == '/';
 215 }
 216
 217 #endif