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d44e3c4f | 1 | /****************************************************************************** |
2 | * Copyright (c) 2000-2016 Ericsson Telecom AB | |
3 | * All rights reserved. This program and the accompanying materials | |
4 | * are made available under the terms of the Eclipse Public License v1.0 | |
5 | * which accompanies this distribution, and is available at | |
6 | * http://www.eclipse.org/legal/epl-v10.html | |
7 | * | |
8 | * Contributors: | |
9 | * Balasko, Jeno | |
10 | * Kovacs, Ferenc | |
11 | * Raduly, Csaba | |
12 | * | |
13 | ******************************************************************************/ | |
970ed795 EL |
14 | #include <stdlib.h> |
15 | #include <string.h> | |
16 | #include <errno.h> | |
17 | ||
18 | #include "Error.hh" | |
19 | #include "RInt.hh" | |
20 | #include "../common/memory.h" | |
21 | ||
22 | // Note: Do not use dbgnew.hh. It doesn't play well with Qt in mctr_gui. | |
23 | // This class is mostly the same as compiler2/Int.cc/Int.hh. They should be | |
24 | // merged later, but it doesn't seem to be easy. | |
25 | ||
26 | #include <openssl/crypto.h> | |
27 | #include <openssl/bn.h> | |
28 | ||
29 | int_val_t::int_val_t() : native_flag(true) | |
30 | { | |
31 | val.openssl = NULL; | |
32 | } | |
33 | ||
34 | int_val_t::int_val_t(const int_val_t& v) | |
35 | { | |
36 | native_flag = v.is_native(); | |
37 | if (native_flag) val.native = v.get_val(); | |
38 | else val.openssl = BN_dup(v.get_val_openssl()); | |
39 | } | |
40 | ||
41 | int_val_t::int_val_t(const char *s) | |
42 | { | |
43 | BIGNUM *n = NULL; | |
44 | if (!BN_dec2bn(&n, *s == '+' ? s + 1 : s)) | |
45 | TTCN_error("Unexpected error when converting `%s' to integer", s); | |
46 | if (BN_num_bits(n) > (int)sizeof(int) * 8 - 1) { | |
47 | native_flag = false; | |
48 | val.openssl = n; | |
49 | } else { | |
50 | native_flag = true; | |
51 | val.native = string2RInt(s); | |
52 | BN_free(n); | |
53 | } | |
54 | } | |
55 | ||
56 | int_val_t::~int_val_t() | |
57 | { | |
58 | if (!native_flag) BN_free(val.openssl); | |
59 | } | |
60 | ||
61 | const RInt& int_val_t::get_val() const | |
62 | { | |
63 | if (!native_flag) TTCN_error("Invalid conversion of a large integer value"); | |
64 | return val.native; | |
65 | } | |
66 | ||
67 | BIGNUM *int_val_t::get_val_openssl() const | |
68 | { | |
69 | if (native_flag) TTCN_error("Invalid conversion of a large integer value"); | |
70 | return val.openssl; | |
71 | } | |
72 | ||
73 | // The returned string must be freed with Free by the caller. Returning | |
74 | // CHARSTRING would be much better, but there're some linking issues. | |
75 | char *int_val_t::as_string() const | |
76 | { | |
77 | if (native_flag) { | |
78 | char *tmp = mprintf("%d", val.native); | |
79 | return tmp; | |
80 | } else { | |
81 | char *tmp1 = NULL, *tmp2 = NULL; | |
82 | if (!(tmp1 = BN_bn2dec(val.openssl))) TTCN_error("int_val_t::c_str()"); | |
83 | tmp2 = mcopystr(tmp1); | |
84 | OPENSSL_free(tmp1); | |
85 | return tmp2; | |
86 | } | |
87 | } | |
88 | ||
89 | int_val_t& int_val_t::operator=(RInt v) | |
90 | { | |
91 | if (!native_flag) BN_free(val.openssl); | |
92 | native_flag = true; | |
93 | val.native = v; | |
94 | return *this; | |
95 | } | |
96 | ||
97 | int_val_t& int_val_t::operator=(const int_val_t& right) | |
98 | { | |
99 | if (!native_flag) BN_free(val.openssl); | |
100 | native_flag = right.is_native(); | |
101 | if (native_flag) val.native = right.get_val(); | |
102 | else val.openssl = BN_dup(right.get_val_openssl()); | |
103 | return *this; | |
104 | } | |
105 | ||
106 | int_val_t& int_val_t::operator<<=(RInt right) | |
107 | { | |
108 | // It makes no sense to support negative operands. GCC returns constant "0" | |
109 | // with "warning: left shift count is negative" for these shifts. | |
110 | if (right < 0) TTCN_error("The second operand of bitwise shift operators " | |
111 | "cannot be negative"); | |
112 | if (right == 0) return *this; | |
113 | if (native_flag) { | |
114 | BIGNUM *result = BN_new(); | |
115 | // Ugly, but can't do better now. | |
116 | char *tmp_str = as_string(); | |
117 | BN_dec2bn(&result, tmp_str); | |
118 | Free(tmp_str); | |
119 | BN_lshift(result, result, right); | |
120 | if (BN_num_bits(result) > (int)sizeof(int) * 8 - 1) { | |
121 | val.openssl = result; | |
122 | native_flag = false; | |
123 | } else { | |
124 | val.native <<= right; | |
125 | BN_free(result); | |
126 | } | |
127 | } else { | |
128 | BN_lshift(val.openssl, val.openssl, right); | |
129 | } | |
130 | return *this; | |
131 | } | |
132 | ||
133 | int_val_t& int_val_t::operator>>=(RInt right) | |
134 | { | |
135 | if (right < 0) TTCN_error("The second operand of bitwise shift operators " | |
136 | "cannot be negative"); | |
137 | if (right == 0) return *this; | |
138 | if (native_flag) { | |
139 | val.native >>= right; | |
140 | } else { | |
141 | BN_rshift(val.openssl, val.openssl, right); | |
142 | if (BN_num_bits(val.openssl) <= (int)sizeof(RInt) * 8 - 1) { | |
143 | char *result_str = BN_bn2dec(val.openssl); | |
144 | RInt result_i = string2RInt(result_str); | |
145 | OPENSSL_free(result_str); | |
146 | native_flag = true; | |
147 | BN_free(val.openssl); | |
148 | val.native = result_i; | |
149 | } | |
150 | } | |
151 | return *this; | |
152 | } | |
153 | ||
154 | int_val_t& int_val_t::operator+=(RInt right) | |
155 | { | |
156 | // Unfortunately we have to check the sign of the "right" operand and | |
157 | // perform addition or subtraction accordingly. | |
158 | if (right == 0) return *this; | |
159 | bool neg = right < 0; | |
160 | if (native_flag) { | |
161 | BIGNUM *result = BN_new(); | |
162 | BN_set_word(result, (BN_ULONG)val.native); | |
163 | if (neg) BN_sub_word(result, (BN_ULONG)right); | |
164 | else BN_add_word(result, (BN_ULONG)right); | |
165 | if (BN_num_bits(result) > (int)sizeof(int) * 8 - 1) { | |
166 | val.openssl = result; | |
167 | native_flag = false; | |
168 | } else { | |
169 | val.native += right; | |
170 | BN_free(result); | |
171 | } | |
172 | } else { | |
173 | if (neg) BN_sub_word(val.openssl, (BN_ULONG)right); | |
174 | else BN_add_word(val.openssl, (BN_ULONG)right); | |
175 | if (BN_num_bits(val.openssl) <= (int)sizeof(int) * 8 - 1) { | |
176 | BN_ULONG tmp = BN_get_word(val.openssl); | |
177 | if (BN_is_negative(val.openssl)) tmp *= -1; | |
178 | BN_free(val.openssl); | |
179 | val.native = tmp; | |
180 | native_flag = true; | |
181 | } | |
182 | } | |
183 | return *this; | |
184 | } | |
185 | ||
186 | bool int_val_t::operator==(const int_val_t& right) const | |
187 | { | |
188 | if (native_flag) { | |
189 | if (right.is_native()) { | |
190 | return val.native == right.val.native; | |
191 | } else { | |
192 | BIGNUM *this_big = to_openssl(val.native); | |
193 | int eq = BN_cmp(this_big, right.get_val_openssl()); | |
194 | BN_free(this_big); | |
195 | return eq == 0; | |
196 | } | |
197 | } else { | |
198 | if (right.is_native()) { | |
199 | BIGNUM *right_big = to_openssl(right.val.native); | |
200 | int eq = BN_cmp(val.openssl, right_big); | |
201 | BN_free(right_big); | |
202 | return eq == 0; | |
203 | } else { | |
204 | return BN_cmp(val.openssl, right.val.openssl) == 0; | |
205 | } | |
206 | } | |
207 | } | |
208 | ||
209 | bool int_val_t::operator<(const int_val_t& v) const | |
210 | { | |
211 | if (native_flag) { | |
212 | if (v.is_native()) { | |
213 | return val.native < v.val.native; | |
214 | } else { | |
215 | BIGNUM *this_big = to_openssl(val.native); | |
216 | int this_equ = BN_cmp(this_big, v.get_val_openssl()); | |
217 | BN_free(this_big); | |
218 | return this_equ == -1; | |
219 | } | |
220 | } else { | |
221 | if (v.is_native()) { | |
222 | BIGNUM *v_big = to_openssl(v.val.native); | |
223 | int v_equ = BN_cmp(val.openssl, v_big); | |
224 | BN_free(v_big); | |
225 | return v_equ == -1; | |
226 | } else { | |
227 | return BN_cmp(val.openssl, v.val.openssl) == -1; | |
228 | } | |
229 | } | |
230 | } | |
231 | ||
232 | int_val_t int_val_t::operator&(RInt right) const | |
233 | { | |
234 | // TODO Right can be int_val_t. BN_is_bit_set/BN_set_bit should be used. | |
235 | BN_ULONG right_bn_ulong = (BN_ULONG)right; | |
236 | if (right != (RInt)right_bn_ulong) TTCN_error("Bitmask is too big"); | |
237 | if (native_flag) { | |
238 | return int_val_t(val.native & right); | |
239 | } else { | |
240 | BIGNUM *tmp = BN_dup(val.openssl); | |
241 | BN_mask_bits(tmp, sizeof(BN_ULONG) * 8); | |
242 | BN_ULONG word = BN_get_word(tmp); | |
243 | BN_free(tmp); | |
244 | return int_val_t(word & right_bn_ulong); | |
245 | } | |
246 | } | |
247 | ||
248 | // Cannot be inline since bignum_st is just a forward declaration in the | |
249 | // header. The compiler must know bignum_st at this point. | |
250 | bool int_val_t::is_negative() const | |
251 | { | |
252 | return (native_flag && val.native < 0) || | |
253 | (!native_flag && BN_is_negative(val.openssl)); | |
254 | } | |
255 | ||
256 | double int_val_t::to_real() const | |
257 | { | |
258 | if (native_flag) { | |
259 | return (double)val.native; | |
260 | } else { | |
261 | char *result_str = BN_bn2dec(val.openssl); | |
262 | double result = 0; | |
263 | if (sscanf(result_str, "%lf", &result) != 1) | |
264 | TTCN_error("Conversion of integer value `%s' to float failed", | |
265 | result_str); | |
266 | OPENSSL_free(result_str); | |
267 | return result; | |
268 | } | |
269 | } | |
270 | ||
271 | BIGNUM *to_openssl(int other_value) | |
272 | { | |
273 | BIGNUM *result = NULL; | |
274 | char *str = mprintf("%d", other_value); | |
275 | BN_dec2bn(&result, str); | |
276 | Free(str); | |
277 | return result; | |
278 | } | |
279 | ||
280 | RInt string2RInt(const char *s) | |
281 | { | |
282 | errno = 0; | |
283 | RInt i = (RInt)strtol(s, (char **)NULL, 10); | |
284 | switch (errno) { | |
285 | case ERANGE: | |
286 | TTCN_error("Overflow when converting `%s' to integer value: %s", s, | |
287 | strerror(errno)); | |
288 | break; | |
289 | case 0: | |
290 | break; | |
291 | default: // EINVAL and others. | |
292 | TTCN_error("Unexpected error when converting `%s' to integer: %s", s, | |
293 | strerror(errno)); | |
294 | break; | |
295 | } | |
296 | return i; | |
297 | } |