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Commit | Line | Data |
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62867571 | 1 | /* |
28428130 | 2 | * Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved. |
0f113f3e | 3 | * |
4a8b0c55 | 4 | * Licensed under the Apache License 2.0 (the "License"). You may not use |
62867571 RS |
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 | |
d02b48c6 RE |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
2bd5d70c | 11 | #include <limits.h> |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ec577822 | 13 | #include <openssl/evp.h> |
a0be4fd1 | 14 | #include "evp_locl.h" |
c0804614 | 15 | #include "internal/evp_int.h" |
d02b48c6 | 16 | |
3fd59700 MC |
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 | ||
a53955d8 | 24 | #ifndef CHARSET_EBCDIC |
3fd59700 | 25 | # define conv_bin2ascii(a, table) ((table)[(a)&0x3f]) |
a53955d8 | 26 | #else |
0f113f3e MC |
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) | |
a53955d8 | 32 | */ |
3fd59700 | 33 | # define conv_bin2ascii(a, table) ((table)[(a)&0x3f]) |
a53955d8 | 34 | #endif |
d02b48c6 | 35 | |
1d97c843 TH |
36 | /*- |
37 | * 64 char lines | |
d02b48c6 RE |
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 | ||
3fd59700 MC |
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 | ||
d02b48c6 | 55 | |
1d97c843 TH |
56 | /*- |
57 | * 0xF0 is a EOLN | |
d02b48c6 RE |
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 | ||
0f113f3e MC |
64 | #define B64_EOLN 0xF0 |
65 | #define B64_CR 0xF1 | |
66 | #define B64_EOF 0xF2 | |
67 | #define B64_WS 0xE0 | |
68 | #define B64_ERROR 0xFF | |
69 | #define B64_NOT_BASE64(a) (((a)|0x13) == 0xF3) | |
2cdce3e3 | 70 | #define B64_BASE64(a) (!B64_NOT_BASE64(a)) |
0f113f3e MC |
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 | }; | |
d02b48c6 | 90 | |
3fd59700 MC |
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 | ||
b785504a | 110 | #ifndef CHARSET_EBCDIC |
3fd59700 | 111 | static unsigned char conv_ascii2bin(unsigned char a, const unsigned char *table) |
b785504a EK |
112 | { |
113 | if (a & 0x80) | |
114 | return B64_ERROR; | |
3fd59700 | 115 | return table[a]; |
b785504a EK |
116 | } |
117 | #else | |
3fd59700 | 118 | static unsigned char conv_ascii2bin(unsigned char a, const unsigned char *table) |
b785504a EK |
119 | { |
120 | a = os_toascii[a]; | |
121 | if (a & 0x80) | |
122 | return B64_ERROR; | |
3fd59700 | 123 | return table[a]; |
b785504a EK |
124 | } |
125 | #endif | |
126 | ||
a0be4fd1 RL |
127 | EVP_ENCODE_CTX *EVP_ENCODE_CTX_new(void) |
128 | { | |
43ecb9c3 | 129 | return OPENSSL_zalloc(sizeof(EVP_ENCODE_CTX)); |
a0be4fd1 RL |
130 | } |
131 | ||
132 | void EVP_ENCODE_CTX_free(EVP_ENCODE_CTX *ctx) | |
133 | { | |
134 | OPENSSL_free(ctx); | |
135 | } | |
c1054bb4 JZ |
136 | |
137 | int EVP_ENCODE_CTX_copy(EVP_ENCODE_CTX *dctx, EVP_ENCODE_CTX *sctx) | |
138 | { | |
139 | memcpy(dctx, sctx, sizeof(EVP_ENCODE_CTX)); | |
140 | ||
141 | return 1; | |
142 | } | |
143 | ||
a0be4fd1 RL |
144 | int EVP_ENCODE_CTX_num(EVP_ENCODE_CTX *ctx) |
145 | { | |
146 | return ctx->num; | |
147 | } | |
148 | ||
c0804614 MC |
149 | void evp_encode_ctx_set_flags(EVP_ENCODE_CTX *ctx, unsigned int flags) |
150 | { | |
151 | ctx->flags = flags; | |
152 | } | |
153 | ||
6b691a5c | 154 | void EVP_EncodeInit(EVP_ENCODE_CTX *ctx) |
0f113f3e MC |
155 | { |
156 | ctx->length = 48; | |
157 | ctx->num = 0; | |
158 | ctx->line_num = 0; | |
c0804614 | 159 | ctx->flags = 0; |
0f113f3e | 160 | } |
d02b48c6 | 161 | |
cf3404fc | 162 | int EVP_EncodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
163 | const unsigned char *in, int inl) |
164 | { | |
165 | int i, j; | |
2bd5d70c | 166 | size_t total = 0; |
0f113f3e MC |
167 | |
168 | *outl = 0; | |
b86d7dca | 169 | if (inl <= 0) |
cf3404fc | 170 | return 0; |
0f113f3e | 171 | OPENSSL_assert(ctx->length <= (int)sizeof(ctx->enc_data)); |
ee1e3cac | 172 | if (ctx->length - ctx->num > inl) { |
0f113f3e MC |
173 | memcpy(&(ctx->enc_data[ctx->num]), in, inl); |
174 | ctx->num += inl; | |
cf3404fc | 175 | return 1; |
0f113f3e MC |
176 | } |
177 | if (ctx->num != 0) { | |
178 | i = ctx->length - ctx->num; | |
179 | memcpy(&(ctx->enc_data[ctx->num]), in, i); | |
180 | in += i; | |
181 | inl -= i; | |
3fd59700 | 182 | j = evp_encodeblock_int(ctx, out, ctx->enc_data, ctx->length); |
0f113f3e MC |
183 | ctx->num = 0; |
184 | out += j; | |
c0804614 MC |
185 | total = j; |
186 | if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) { | |
187 | *(out++) = '\n'; | |
188 | total++; | |
189 | } | |
0f113f3e | 190 | *out = '\0'; |
0f113f3e | 191 | } |
2bd5d70c | 192 | while (inl >= ctx->length && total <= INT_MAX) { |
3fd59700 | 193 | j = evp_encodeblock_int(ctx, out, in, ctx->length); |
0f113f3e MC |
194 | in += ctx->length; |
195 | inl -= ctx->length; | |
196 | out += j; | |
c0804614 MC |
197 | total += j; |
198 | if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) { | |
199 | *(out++) = '\n'; | |
200 | total++; | |
201 | } | |
0f113f3e | 202 | *out = '\0'; |
0f113f3e | 203 | } |
2bd5d70c MC |
204 | if (total > INT_MAX) { |
205 | /* Too much output data! */ | |
206 | *outl = 0; | |
cf3404fc | 207 | return 0; |
2bd5d70c | 208 | } |
0f113f3e MC |
209 | if (inl != 0) |
210 | memcpy(&(ctx->enc_data[0]), in, inl); | |
211 | ctx->num = inl; | |
212 | *outl = total; | |
cf3404fc MC |
213 | |
214 | return 1; | |
0f113f3e | 215 | } |
d02b48c6 | 216 | |
6b691a5c | 217 | void EVP_EncodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
218 | { |
219 | unsigned int ret = 0; | |
220 | ||
221 | if (ctx->num != 0) { | |
3fd59700 | 222 | ret = evp_encodeblock_int(ctx, out, ctx->enc_data, ctx->num); |
c0804614 MC |
223 | if ((ctx->flags & EVP_ENCODE_CTX_NO_NEWLINES) == 0) |
224 | out[ret++] = '\n'; | |
0f113f3e MC |
225 | out[ret] = '\0'; |
226 | ctx->num = 0; | |
227 | } | |
228 | *outl = ret; | |
229 | } | |
d02b48c6 | 230 | |
3fd59700 MC |
231 | static int evp_encodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t, |
232 | const unsigned char *f, int dlen) | |
0f113f3e MC |
233 | { |
234 | int i, ret = 0; | |
235 | unsigned long l; | |
3fd59700 MC |
236 | const unsigned char *table; |
237 | ||
238 | if (ctx != NULL && (ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0) | |
239 | table = srpdata_bin2ascii; | |
240 | else | |
241 | table = data_bin2ascii; | |
0f113f3e MC |
242 | |
243 | for (i = dlen; i > 0; i -= 3) { | |
244 | if (i >= 3) { | |
245 | l = (((unsigned long)f[0]) << 16L) | | |
246 | (((unsigned long)f[1]) << 8L) | f[2]; | |
3fd59700 MC |
247 | *(t++) = conv_bin2ascii(l >> 18L, table); |
248 | *(t++) = conv_bin2ascii(l >> 12L, table); | |
249 | *(t++) = conv_bin2ascii(l >> 6L, table); | |
250 | *(t++) = conv_bin2ascii(l, table); | |
0f113f3e MC |
251 | } else { |
252 | l = ((unsigned long)f[0]) << 16L; | |
253 | if (i == 2) | |
254 | l |= ((unsigned long)f[1] << 8L); | |
255 | ||
3fd59700 MC |
256 | *(t++) = conv_bin2ascii(l >> 18L, table); |
257 | *(t++) = conv_bin2ascii(l >> 12L, table); | |
258 | *(t++) = (i == 1) ? '=' : conv_bin2ascii(l >> 6L, table); | |
0f113f3e MC |
259 | *(t++) = '='; |
260 | } | |
261 | ret += 4; | |
262 | f += 3; | |
263 | } | |
264 | ||
265 | *t = '\0'; | |
26a7d938 | 266 | return ret; |
0f113f3e | 267 | } |
d02b48c6 | 268 | |
3fd59700 MC |
269 | int EVP_EncodeBlock(unsigned char *t, const unsigned char *f, int dlen) |
270 | { | |
271 | return evp_encodeblock_int(NULL, t, f, dlen); | |
272 | } | |
273 | ||
6b691a5c | 274 | void EVP_DecodeInit(EVP_ENCODE_CTX *ctx) |
0f113f3e | 275 | { |
c0804614 | 276 | /* Only ctx->num and ctx->flags are used during decoding. */ |
0f113f3e | 277 | ctx->num = 0; |
3cdd1e94 | 278 | ctx->length = 0; |
0f113f3e | 279 | ctx->line_num = 0; |
c0804614 | 280 | ctx->flags = 0; |
0f113f3e | 281 | } |
d02b48c6 | 282 | |
1d97c843 TH |
283 | /*- |
284 | * -1 for error | |
d02b48c6 RE |
285 | * 0 for last line |
286 | * 1 for full line | |
3cdd1e94 EK |
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. | |
d02b48c6 | 302 | */ |
6b691a5c | 303 | int EVP_DecodeUpdate(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl, |
0f113f3e MC |
304 | const unsigned char *in, int inl) |
305 | { | |
3cdd1e94 | 306 | int seof = 0, eof = 0, rv = -1, ret = 0, i, v, tmp, n, decoded_len; |
0f113f3e | 307 | unsigned char *d; |
3fd59700 | 308 | const unsigned char *table; |
0f113f3e MC |
309 | |
310 | n = ctx->num; | |
311 | d = ctx->enc_data; | |
0f113f3e | 312 | |
3cdd1e94 EK |
313 | if (n > 0 && d[n - 1] == '=') { |
314 | eof++; | |
315 | if (n > 1 && d[n - 2] == '=') | |
316 | eof++; | |
317 | } | |
318 | ||
319 | /* Legacy behaviour: an empty input chunk signals end of input. */ | |
320 | if (inl == 0) { | |
0f113f3e MC |
321 | rv = 0; |
322 | goto end; | |
323 | } | |
324 | ||
3fd59700 MC |
325 | if ((ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0) |
326 | table = srpdata_ascii2bin; | |
327 | else | |
328 | table = data_ascii2bin; | |
329 | ||
0f113f3e | 330 | for (i = 0; i < inl; i++) { |
0f113f3e | 331 | tmp = *(in++); |
3fd59700 | 332 | v = conv_ascii2bin(tmp, table); |
3cdd1e94 | 333 | if (v == B64_ERROR) { |
0f113f3e MC |
334 | rv = -1; |
335 | goto end; | |
336 | } | |
337 | ||
0f113f3e | 338 | if (tmp == '=') { |
0f113f3e | 339 | eof++; |
3cdd1e94 EK |
340 | } else if (eof > 0 && B64_BASE64(v)) { |
341 | /* More data after padding. */ | |
342 | rv = -1; | |
343 | goto end; | |
0f113f3e MC |
344 | } |
345 | ||
3cdd1e94 EK |
346 | if (eof > 2) { |
347 | rv = -1; | |
348 | goto end; | |
0f113f3e MC |
349 | } |
350 | ||
3cdd1e94 EK |
351 | if (v == B64_EOF) { |
352 | seof = 1; | |
353 | goto tail; | |
0f113f3e MC |
354 | } |
355 | ||
3cdd1e94 EK |
356 | /* Only save valid base64 characters. */ |
357 | if (B64_BASE64(v)) { | |
358 | 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 | rv = -1; | |
0f113f3e | 365 | goto end; |
3cdd1e94 EK |
366 | } |
367 | OPENSSL_assert(n < (int)sizeof(ctx->enc_data)); | |
368 | d[n++] = tmp; | |
369 | } | |
0f113f3e | 370 | |
3cdd1e94 | 371 | if (n == 64) { |
3fd59700 | 372 | decoded_len = evp_decodeblock_int(ctx, out, d, n); |
3cdd1e94 EK |
373 | n = 0; |
374 | if (decoded_len < 0 || eof > decoded_len) { | |
375 | rv = -1; | |
0f113f3e MC |
376 | goto end; |
377 | } | |
3cdd1e94 EK |
378 | ret += decoded_len - eof; |
379 | out += decoded_len - eof; | |
0f113f3e MC |
380 | } |
381 | } | |
3cdd1e94 EK |
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 | tail: | |
389 | if (n > 0) { | |
390 | if ((n & 3) == 0) { | |
3fd59700 | 391 | decoded_len = evp_decodeblock_int(ctx, out, d, n); |
4fe1cbdf VD |
392 | n = 0; |
393 | if (decoded_len < 0 || eof > decoded_len) { | |
394 | rv = -1; | |
395 | goto end; | |
396 | } | |
397 | ret += (decoded_len - eof); | |
3cdd1e94 EK |
398 | } else if (seof) { |
399 | /* EOF in the middle of a base64 block. */ | |
400 | rv = -1; | |
401 | goto end; | |
402 | } | |
403 | } | |
404 | ||
405 | rv = seof || (n == 0 && eof) ? 0 : 1; | |
406 | end: | |
407 | /* Legacy behaviour. This should probably rather be zeroed on error. */ | |
0f113f3e MC |
408 | *outl = ret; |
409 | ctx->num = n; | |
26a7d938 | 410 | return rv; |
0f113f3e | 411 | } |
d02b48c6 | 412 | |
3fd59700 MC |
413 | static int evp_decodeblock_int(EVP_ENCODE_CTX *ctx, unsigned char *t, |
414 | const unsigned char *f, int n) | |
0f113f3e MC |
415 | { |
416 | int i, ret = 0, a, b, c, d; | |
417 | unsigned long l; | |
3fd59700 MC |
418 | const unsigned char *table; |
419 | ||
420 | if (ctx != NULL && (ctx->flags & EVP_ENCODE_CTX_USE_SRP_ALPHABET) != 0) | |
421 | table = srpdata_ascii2bin; | |
422 | else | |
423 | table = data_ascii2bin; | |
0f113f3e MC |
424 | |
425 | /* trim white space from the start of the line. */ | |
3fd59700 | 426 | while ((conv_ascii2bin(*f, table) == B64_WS) && (n > 0)) { |
0f113f3e MC |
427 | f++; |
428 | n--; | |
429 | } | |
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 | */ | |
3fd59700 | 435 | while ((n > 3) && (B64_NOT_BASE64(conv_ascii2bin(f[n - 1], table)))) |
0f113f3e MC |
436 | n--; |
437 | ||
438 | if (n % 4 != 0) | |
26a7d938 | 439 | return -1; |
0f113f3e MC |
440 | |
441 | for (i = 0; i < n; i += 4) { | |
3fd59700 MC |
442 | a = conv_ascii2bin(*(f++), table); |
443 | b = conv_ascii2bin(*(f++), table); | |
444 | c = conv_ascii2bin(*(f++), table); | |
445 | d = conv_ascii2bin(*(f++), table); | |
0f113f3e | 446 | if ((a & 0x80) || (b & 0x80) || (c & 0x80) || (d & 0x80)) |
26a7d938 | 447 | return -1; |
0f113f3e MC |
448 | l = ((((unsigned long)a) << 18L) | |
449 | (((unsigned long)b) << 12L) | | |
450 | (((unsigned long)c) << 6L) | (((unsigned long)d))); | |
451 | *(t++) = (unsigned char)(l >> 16L) & 0xff; | |
452 | *(t++) = (unsigned char)(l >> 8L) & 0xff; | |
453 | *(t++) = (unsigned char)(l) & 0xff; | |
454 | ret += 3; | |
455 | } | |
26a7d938 | 456 | return ret; |
0f113f3e | 457 | } |
d02b48c6 | 458 | |
3fd59700 MC |
459 | int EVP_DecodeBlock(unsigned char *t, const unsigned char *f, int n) |
460 | { | |
461 | return evp_decodeblock_int(NULL, t, f, n); | |
462 | } | |
463 | ||
6b691a5c | 464 | int EVP_DecodeFinal(EVP_ENCODE_CTX *ctx, unsigned char *out, int *outl) |
0f113f3e MC |
465 | { |
466 | int i; | |
467 | ||
468 | *outl = 0; | |
469 | if (ctx->num != 0) { | |
3fd59700 | 470 | i = evp_decodeblock_int(ctx, out, ctx->enc_data, ctx->num); |
0f113f3e | 471 | if (i < 0) |
26a7d938 | 472 | return -1; |
0f113f3e MC |
473 | ctx->num = 0; |
474 | *outl = i; | |
208fb891 | 475 | return 1; |
0f113f3e | 476 | } else |
208fb891 | 477 | return 1; |
0f113f3e | 478 | } |