/src/openssl111/crypto/evp/encode.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved. |
3 | | * |
4 | | * Licensed under the OpenSSL license (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 | | #include <stdio.h> |
11 | | #include <limits.h> |
12 | | #include "internal/cryptlib.h" |
13 | | #include <openssl/evp.h> |
14 | | #include "evp_local.h" |
15 | | #include "crypto/evp.h" |
16 | | |
17 | | static unsigned char conv_ascii2bin(unsigned char a, |
18 | | const unsigned char *table); |
19 | | static int evp_encodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t, |
20 | | const unsigned char *f, int dlen); |
21 | | static int evp_decodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t, |
22 | | const unsigned char *f, int n); |
23 | | |
24 | | #ifndef CHARSET_EBCDIC |
25 | 0 | # define conv_bin2ascii(a, table) ((table)[(a)&0x3f]) |
26 | | #else |
27 | | /* |
28 | | * We assume that PEM encoded files are EBCDIC files (i.e., printable text |
29 | | * files). Convert them here while decoding. When encoding, output is EBCDIC |
30 | | * (text) format again. (No need for conversion in the conv_bin2ascii macro, |
31 | | * as the underlying textstring data_bin2ascii[] is already EBCDIC) |
32 | | */ |
33 | | # define conv_bin2ascii(a, table) ((table)[(a)&0x3f]) |
34 | | #endif |
35 | | |
36 | | /*- |
37 | | * 64 char lines |
38 | | * pad input with 0 |
39 | | * left over chars are set to = |
40 | | * 1 byte => xx== |
41 | | * 2 bytes => xxx= |
42 | | * 3 bytes => xxxx |
43 | | */ |
44 | | #define BIN_PER_LINE (64/4*3) |
45 | | #define CHUNKS_PER_LINE (64/4) |
46 | | #define CHAR_PER_LINE (64+1) |
47 | | |
48 | | static const unsigned char data_bin2ascii[65] = |
49 | | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
50 | | |
51 | | /* SRP uses a different base64 alphabet */ |
52 | | static const unsigned char srpdata_bin2ascii[65] = |
53 | | "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz./"; |
54 | | |
55 | | |
56 | | /*- |
57 | | * 0xF0 is a EOLN |
58 | | * 0xF1 is ignore but next needs to be 0xF0 (for \r\n processing). |
59 | | * 0xF2 is EOF |
60 | | * 0xE0 is ignore at start of line. |
61 | | * 0xFF is error |
62 | | */ |
63 | | |
64 | | #define B64_EOLN 0xF0 |
65 | | #define B64_CR 0xF1 |
66 | 0 | #define B64_EOF 0xF2 |
67 | 0 | #define B64_WS 0xE0 |
68 | 0 | #define B64_ERROR 0xFF |
69 | 0 | #define B64_NOT_BASE64(a) (((a)|0x13) == 0xF3) |
70 | 0 | #define B64_BASE64(a) (!B64_NOT_BASE64(a)) |
71 | | |
72 | | static const unsigned char data_ascii2bin[128] = { |
73 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
74 | | 0xFF, 0xE0, 0xF0, 0xFF, 0xFF, 0xF1, 0xFF, 0xFF, |
75 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
76 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
77 | | 0xE0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
78 | | 0xFF, 0xFF, 0xFF, 0x3E, 0xFF, 0xF2, 0xFF, 0x3F, |
79 | | 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, |
80 | | 0x3C, 0x3D, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, |
81 | | 0xFF, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, |
82 | | 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, |
83 | | 0x0F, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, |
84 | | 0x17, 0x18, 0x19, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
85 | | 0xFF, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, |
86 | | 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, |
87 | | 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, |
88 | | 0x31, 0x32, 0x33, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
89 | | }; |
90 | | |
91 | | static const unsigned char srpdata_ascii2bin[128] = { |
92 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
93 | | 0xFF, 0xE0, 0xF0, 0xFF, 0xFF, 0xF1, 0xFF, 0xFF, |
94 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
95 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
96 | | 0xE0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
97 | | 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF2, 0x3E, 0x3F, |
98 | | 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
99 | | 0x08, 0x09, 0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, |
100 | | 0xFF, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, |
101 | | 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, |
102 | | 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, |
103 | | 0x21, 0x22, 0x23, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
104 | | 0xFF, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, |
105 | | 0x2B, 0x2C, 0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, |
106 | | 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, |
107 | | 0x3B, 0x3C, 0x3D, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
108 | | }; |
109 | | |
110 | | #ifndef CHARSET_EBCDIC |
111 | | static unsigned char conv_ascii2bin(unsigned char a, const unsigned char *table) |
112 | 0 | { |
113 | 0 | if (a & 0x80) |
114 | 0 | return B64_ERROR; |
115 | 0 | return table[a]; |
116 | 0 | } |
117 | | #else |
118 | | static unsigned char conv_ascii2bin(unsigned char a, const unsigned char *table) |
119 | | { |
120 | | a = os_toascii[a]; |
121 | | if (a & 0x80) |
122 | | return B64_ERROR; |
123 | | return table[a]; |
124 | | } |
125 | | #endif |
126 | | |
127 | | EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void) |
128 | 0 | { |
129 | 0 | return OPENSSL_zalloc(sizeof(EVP_ENCODE_CTX)); |
130 | 0 | } |
131 | | |
132 | | void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx) |
133 | 0 | { |
134 | 0 | OPENSSL_free(ctx); |
135 | 0 | } |
136 | | |
137 | | int EVP_ENCODE_CTX_copy(EVP_ENCODE_CTX *dctx, EVP_ENCODE_CTX *sctx) |
138 | 0 | { |
139 | 0 | memcpy(dctx, sctx, sizeof(EVP_ENCODE_CTX)); |
140 | |
|
141 | 0 | return 1; |
142 | 0 | } |
143 | | |
144 | | int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx) |
145 | 0 | { |
146 | 0 | return ctx->num; |
147 | 0 | } |
148 | | |
149 | | void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags) |
150 | 0 | { |
151 | 0 | ctx->flags = flags; |
152 | 0 | } |
153 | | |
154 | | void EVP_EncodeInit(EVP_ENCODE_CTX *ctx) |
155 | 0 | { |
156 | 0 | ctx->length = 48; |
157 | 0 | ctx->num = 0; |
158 | 0 | ctx->line_num = 0; |
159 | 0 | ctx->flags = 0; |
160 | 0 | } |
161 | | |
162 | | int EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, |
163 | | const unsigned char *in, int inl) |
164 | 0 | { |
165 | 0 | int i, j; |
166 | 0 | size_t total = 0; |
167 | |
|
168 | 0 | *outl = 0; |
169 | 0 | if (inl <= 0) |
170 | 0 | return 0; |
171 | 0 | OPENSSL_assert(ctx->length <= (int)sizeof(ctx->enc_data)); |
172 | 0 | if (ctx->length - ctx->num > inl) { |
173 | 0 | memcpy(&(ctx->enc_data[ctx->num]), in, inl); |
174 | 0 | ctx->num += inl; |
175 | 0 | return 1; |
176 | 0 | } |
177 | 0 | if (ctx->num != 0) { |
178 | 0 | i = ctx->length - ctx->num; |
179 | 0 | memcpy(&(ctx->enc_data[ctx->num]), in, i); |
180 | 0 | in += i; |
181 | 0 | inl -= i; |
182 | 0 | j = evp_encodeblock_int(ctx, out, ctx->enc_data, ctx->length); |
183 | 0 | ctx->num = 0; |
184 | 0 | out += j; |
185 | 0 | total = j; |
186 | 0 | if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) { |
187 | 0 | *(out++) = '\n'; |
188 | 0 | total++; |
189 | 0 | } |
190 | 0 | *out = '\0'; |
191 | 0 | } |
192 | 0 | while (inl >= ctx->length && total <= INT_MAX) { |
193 | 0 | j = evp_encodeblock_int(ctx, out, in, ctx->length); |
194 | 0 | in += ctx->length; |
195 | 0 | inl -= ctx->length; |
196 | 0 | out += j; |
197 | 0 | total += j; |
198 | 0 | if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) { |
199 | 0 | *(out++) = '\n'; |
200 | 0 | total++; |
201 | 0 | } |
202 | 0 | *out = '\0'; |
203 | 0 | } |
204 | 0 | if (total > INT_MAX) { |
205 | | /* Too much output data! */ |
206 | 0 | *outl = 0; |
207 | 0 | return 0; |
208 | 0 | } |
209 | 0 | if (inl != 0) |
210 | 0 | memcpy(&(ctx->enc_data[0]), in, inl); |
211 | 0 | ctx->num = inl; |
212 | 0 | *outl = total; |
213 | |
|
214 | 0 | return 1; |
215 | 0 | } |
216 | | |
217 | | void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) |
218 | 0 | { |
219 | 0 | unsigned int ret = 0; |
220 | |
|
221 | 0 | if (ctx->num != 0) { |
222 | 0 | ret = evp_encodeblock_int(ctx, out, ctx->enc_data, ctx->num); |
223 | 0 | if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) |
224 | 0 | out[ret++] = '\n'; |
225 | 0 | out[ret] = '\0'; |
226 | 0 | ctx->num = 0; |
227 | 0 | } |
228 | 0 | *outl = ret; |
229 | 0 | } |
230 | | |
231 | | static int evp_encodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t, |
232 | | const unsigned char *f, int dlen) |
233 | 0 | { |
234 | 0 | int i, ret = 0; |
235 | 0 | unsigned long l; |
236 | 0 | const unsigned char *table; |
237 | |
|
238 | 0 | if (ctx != NULL && (ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0) |
239 | 0 | table = srpdata_bin2ascii; |
240 | 0 | else |
241 | 0 | table = data_bin2ascii; |
242 | |
|
243 | 0 | for (i = dlen; i > 0; i -= 3) { |
244 | 0 | if (i >= 3) { |
245 | 0 | l = (((unsigned long)f[0]) << 16L) | |
246 | 0 | (((unsigned long)f[1]) << 8L) | f[2]; |
247 | 0 | *(t++) = conv_bin2ascii(l >> 18L, table); |
248 | 0 | *(t++) = conv_bin2ascii(l >> 12L, table); |
249 | 0 | *(t++) = conv_bin2ascii(l >> 6L, table); |
250 | 0 | *(t++) = conv_bin2ascii(l, table); |
251 | 0 | } else { |
252 | 0 | l = ((unsigned long)f[0]) << 16L; |
253 | 0 | if (i == 2) |
254 | 0 | l |= ((unsigned long)f[1] << 8L); |
255 | |
|
256 | 0 | *(t++) = conv_bin2ascii(l >> 18L, table); |
257 | 0 | *(t++) = conv_bin2ascii(l >> 12L, table); |
258 | 0 | *(t++) = (i == 1) ? '=' : conv_bin2ascii(l >> 6L, table); |
259 | 0 | *(t++) = '='; |
260 | 0 | } |
261 | 0 | ret += 4; |
262 | 0 | f += 3; |
263 | 0 | } |
264 | |
|
265 | 0 | *t = '\0'; |
266 | 0 | return ret; |
267 | 0 | } |
268 | | |
269 | | int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen) |
270 | 0 | { |
271 | 0 | return evp_encodeblock_int(NULL, t, f, dlen); |
272 | 0 | } |
273 | | |
274 | | void EVP_DecodeInit(EVP_ENCODE_CTX *ctx) |
275 | 0 | { |
276 | | /* Only ctx->num and ctx->flags are used during decoding. */ |
277 | 0 | ctx->num = 0; |
278 | 0 | ctx->length = 0; |
279 | 0 | ctx->line_num = 0; |
280 | 0 | ctx->flags = 0; |
281 | 0 | } |
282 | | |
283 | | /*- |
284 | | * -1 for error |
285 | | * 0 for last line |
286 | | * 1 for full line |
287 | | * |
288 | | * Note: even though EVP_DecodeUpdate attempts to detect and report end of |
289 | | * content, the context doesn't currently remember it and will accept more data |
290 | | * in the next call. Therefore, the caller is responsible for checking and |
291 | | * rejecting a 0 return value in the middle of content. |
292 | | * |
293 | | * Note: even though EVP_DecodeUpdate has historically tried to detect end of |
294 | | * content based on line length, this has never worked properly. Therefore, |
295 | | * we now return 0 when one of the following is true: |
296 | | * - Padding or B64_EOF was detected and the last block is complete. |
297 | | * - Input has zero-length. |
298 | | * -1 is returned if: |
299 | | * - Invalid characters are detected. |
300 | | * - There is extra trailing padding, or data after padding. |
301 | | * - B64_EOF is detected after an incomplete base64 block. |
302 | | */ |
303 | | int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, |
304 | | const unsigned char *in, int inl) |
305 | 0 | { |
306 | 0 | int seof = 0, eof = 0, rv = -1, ret = 0, i, v, tmp, n, decoded_len; |
307 | 0 | unsigned char *d; |
308 | 0 | const unsigned char *table; |
309 | |
|
310 | 0 | n = ctx->num; |
311 | 0 | d = ctx->enc_data; |
312 | |
|
313 | 0 | if (n > 0 && d[n - 1] == '=') { |
314 | 0 | eof++; |
315 | 0 | if (n > 1 && d[n - 2] == '=') |
316 | 0 | eof++; |
317 | 0 | } |
318 | | |
319 | | /* Legacy behaviour: an empty input chunk signals end of input. */ |
320 | 0 | if (inl == 0) { |
321 | 0 | rv = 0; |
322 | 0 | goto end; |
323 | 0 | } |
324 | | |
325 | 0 | if ((ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0) |
326 | 0 | table = srpdata_ascii2bin; |
327 | 0 | else |
328 | 0 | table = data_ascii2bin; |
329 | |
|
330 | 0 | for (i = 0; i < inl; i++) { |
331 | 0 | tmp = *(in++); |
332 | 0 | v = conv_ascii2bin(tmp, table); |
333 | 0 | if (v == B64_ERROR) { |
334 | 0 | rv = -1; |
335 | 0 | goto end; |
336 | 0 | } |
337 | | |
338 | 0 | if (tmp == '=') { |
339 | 0 | eof++; |
340 | 0 | } else if (eof > 0 && B64_BASE64(v)) { |
341 | | /* More data after padding. */ |
342 | 0 | rv = -1; |
343 | 0 | goto end; |
344 | 0 | } |
345 | | |
346 | 0 | if (eof > 2) { |
347 | 0 | rv = -1; |
348 | 0 | goto end; |
349 | 0 | } |
350 | | |
351 | 0 | if (v == B64_EOF) { |
352 | 0 | seof = 1; |
353 | 0 | goto tail; |
354 | 0 | } |
355 | | |
356 | | /* Only save valid base64 characters. */ |
357 | 0 | if (B64_BASE64(v)) { |
358 | 0 | if (n >= 64) { |
359 | | /* |
360 | | * We increment n once per loop, and empty the buffer as soon as |
361 | | * we reach 64 characters, so this can only happen if someone's |
362 | | * manually messed with the ctx. Refuse to write any more data. |
363 | | */ |
364 | 0 | rv = -1; |
365 | 0 | goto end; |
366 | 0 | } |
367 | 0 | OPENSSL_assert(n < (int)sizeof(ctx->enc_data)); |
368 | 0 | d[n++] = tmp; |
369 | 0 | } |
370 | | |
371 | 0 | if (n == 64) { |
372 | 0 | decoded_len = evp_decodeblock_int(ctx, out, d, n); |
373 | 0 | n = 0; |
374 | 0 | if (decoded_len < 0 || eof > decoded_len) { |
375 | 0 | rv = -1; |
376 | 0 | goto end; |
377 | 0 | } |
378 | 0 | ret += decoded_len - eof; |
379 | 0 | out += decoded_len - eof; |
380 | 0 | } |
381 | 0 | } |
382 | | |
383 | | /* |
384 | | * Legacy behaviour: if the current line is a full base64-block (i.e., has |
385 | | * 0 mod 4 base64 characters), it is processed immediately. We keep this |
386 | | * behaviour as applications may not be calling EVP_DecodeFinal properly. |
387 | | */ |
388 | 0 | tail: |
389 | 0 | if (n > 0) { |
390 | 0 | if ((n & 3) == 0) { |
391 | 0 | decoded_len = evp_decodeblock_int(ctx, out, d, n); |
392 | 0 | n = 0; |
393 | 0 | if (decoded_len < 0 || eof > decoded_len) { |
394 | 0 | rv = -1; |
395 | 0 | goto end; |
396 | 0 | } |
397 | 0 | ret += (decoded_len - eof); |
398 | 0 | } else if (seof) { |
399 | | /* EOF in the middle of a base64 block. */ |
400 | 0 | rv = -1; |
401 | 0 | goto end; |
402 | 0 | } |
403 | 0 | } |
404 | | |
405 | 0 | rv = seof || (n == 0 && eof) ? 0 : 1; |
406 | 0 | end: |
407 | | /* Legacy behaviour. This should probably rather be zeroed on error. */ |
408 | 0 | *outl = ret; |
409 | 0 | ctx->num = n; |
410 | 0 | return rv; |
411 | 0 | } |
412 | | |
413 | | static int evp_decodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t, |
414 | | const unsigned char *f, int n) |
415 | 0 | { |
416 | 0 | int i, ret = 0, a, b, c, d; |
417 | 0 | unsigned long l; |
418 | 0 | const unsigned char *table; |
419 | |
|
420 | 0 | if (ctx != NULL && (ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0) |
421 | 0 | table = srpdata_ascii2bin; |
422 | 0 | else |
423 | 0 | table = data_ascii2bin; |
424 | | |
425 | | /* trim white space from the start of the line. */ |
426 | 0 | while ((n > 0) && (conv_ascii2bin(*f, table) == B64_WS)) { |
427 | 0 | f++; |
428 | 0 | n--; |
429 | 0 | } |
430 | | |
431 | | /* |
432 | | * strip off stuff at the end of the line ascii2bin values B64_WS, |
433 | | * B64_EOLN, B64_EOLN and B64_EOF |
434 | | */ |
435 | 0 | while ((n > 3) && (B64_NOT_BASE64(conv_ascii2bin(f[n - 1], table)))) |
436 | 0 | n--; |
437 | |
|
438 | 0 | if (n % 4 != 0) |
439 | 0 | return -1; |
440 | | |
441 | 0 | for (i = 0; i < n; i += 4) { |
442 | 0 | a = conv_ascii2bin(*(f++), table); |
443 | 0 | b = conv_ascii2bin(*(f++), table); |
444 | 0 | c = conv_ascii2bin(*(f++), table); |
445 | 0 | d = conv_ascii2bin(*(f++), table); |
446 | 0 | if ((a & 0x80) || (b & 0x80) || (c & 0x80) || (d & 0x80)) |
447 | 0 | return -1; |
448 | 0 | l = ((((unsigned long)a) << 18L) | |
449 | 0 | (((unsigned long)b) << 12L) | |
450 | 0 | (((unsigned long)c) << 6L) | (((unsigned long)d))); |
451 | 0 | *(t++) = (unsigned char)(l >> 16L) & 0xff; |
452 | 0 | *(t++) = (unsigned char)(l >> 8L) & 0xff; |
453 | 0 | *(t++) = (unsigned char)(l) & 0xff; |
454 | 0 | ret += 3; |
455 | 0 | } |
456 | 0 | return ret; |
457 | 0 | } |
458 | | |
459 | | int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n) |
460 | 0 | { |
461 | 0 | return evp_decodeblock_int(NULL, t, f, n); |
462 | 0 | } |
463 | | |
464 | | int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) |
465 | 0 | { |
466 | 0 | int i; |
467 | |
|
468 | 0 | *outl = 0; |
469 | 0 | if (ctx->num != 0) { |
470 | 0 | i = evp_decodeblock_int(ctx, out, ctx->enc_data, ctx->num); |
471 | 0 | if (i < 0) |
472 | 0 | return -1; |
473 | 0 | ctx->num = 0; |
474 | 0 | *outl = i; |
475 | 0 | return 1; |
476 | 0 | } else |
477 | 0 | return 1; |
478 | 0 | } |