1 /* crypto/pem/pem_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59 #include <stdio.h>
60 #include <ctype.h>
61 #include "cryptlib.h"
62 #include <openssl/buffer.h>
63 #include <openssl/objects.h>
64 #include <openssl/evp.h>
65 #include <openssl/rand.h>
66 #include <openssl/x509.h>
67 #include <openssl/pem.h>
68 #include <openssl/pkcs12.h>
69 #include "asn1_locl.h"
70 #ifndef OPENSSL_NO_DES
71 #include <openssl/des.h>
72 #endif
73 #ifndef OPENSSL_NO_ENGINE
74 #include <openssl/engine.h>
75 #endif
76
77 const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
78
79 #define MIN_LENGTH 4
80
81 static int load_iv(char **fromp,unsigned char *to, int num);
82 static int check_pem(const char *nm, const char *name);
83 int pem_check_suffix(const char *pem_str, const char *suffix);
84
85 int PEM_def_callback(char *buf, int num, int w, void *key)
86 {
87 #ifdef OPENSSL_NO_FP_API
88 /* We should not ever call the default callback routine from
89 * windows. */
90 PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
91 return(-1);
92 #else
93 int i,j;
94 const char *prompt;
95 if(key) {
96 i=strlen(key);
97 i=(i > num)?num:i;
98 memcpy(buf,key,i);
99 return(i);
100 }
101
102 prompt=EVP_get_pw_prompt();
103 if (prompt == NULL)
104 prompt="Enter PEM pass phrase:";
105
106 for (;;)
107 {
108 i=EVP_read_pw_string_min(buf,MIN_LENGTH,num,prompt,w);
109 if (i != 0)
110 {
111 PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
112 memset(buf,0,(unsigned int)num);
113 return(-1);
114 }
115 j=strlen(buf);
116 if (j < MIN_LENGTH)
117 {
118 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
119 }
120 else
121 break;
122 }
123 return(j);
124 #endif
125 }
126
127 void PEM_proc_type(char *buf, int type)
128 {
129 const char *str;
130
131 if (type == PEM_TYPE_ENCRYPTED)
132 str="ENCRYPTED";
133 else if (type == PEM_TYPE_MIC_CLEAR)
134 str="MIC-CLEAR";
135 else if (type == PEM_TYPE_MIC_ONLY)
136 str="MIC-ONLY";
137 else
138 str="BAD-TYPE";
139
140 BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
141 BUF_strlcat(buf,str,PEM_BUFSIZE);
142 BUF_strlcat(buf,"\n",PEM_BUFSIZE);
143 }
144
145 void PEM_dek_info(char *buf, const char *type, int len, char *str)
146 {
147 static const unsigned char map[17]="0123456789ABCDEF";
148 long i;
149 int j;
150
151 BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
152 BUF_strlcat(buf,type,PEM_BUFSIZE);
153 BUF_strlcat(buf,",",PEM_BUFSIZE);
154 j=strlen(buf);
155 if (j + (len * 2) + 1 > PEM_BUFSIZE)
156 return;
157 for (i=0; i<len; i++)
158 {
159 buf[j+i*2] =map[(str[i]>>4)&0x0f];
160 buf[j+i*2+1]=map[(str[i] )&0x0f];
161 }
162 buf[j+i*2]='\n';
163 buf[j+i*2+1]='\0';
164 }
165
166 #ifndef OPENSSL_NO_FP_API
167 void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
168 pem_password_cb *cb, void *u)
169 {
170 BIO *b;
171 void *ret;
172
173 if ((b=BIO_new(BIO_s_file())) == NULL)
174 {
175 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
176 return(0);
177 }
178 BIO_set_fp(b,fp,BIO_NOCLOSE);
179 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
180 BIO_free(b);
181 return(ret);
182 }
183 #endif
184
185 static int check_pem(const char *nm, const char *name)
186 {
187 /* Normal matching nm and name */
188 if (!strcmp(nm,name)) return 1;
189
190 /* Make PEM_STRING_EVP_PKEY match any private key */
191
192 if(!strcmp(name,PEM_STRING_EVP_PKEY))
193 {
194 int slen;
195 const EVP_PKEY_ASN1_METHOD *ameth;
196 if(!strcmp(nm,PEM_STRING_PKCS8))
197 return 1;
198 if(!strcmp(nm,PEM_STRING_PKCS8INF))
199 return 1;
200 slen = pem_check_suffix(nm, "PRIVATE KEY");
201 if (slen > 0)
202 {
203 /* NB: ENGINE implementations wont contain
204 * a deprecated old private key decode function
205 * so don't look for them.
206 */
207 ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
208 if (ameth && ameth->old_priv_decode)
209 return 1;
210 }
211 return 0;
212 }
213
214 if(!strcmp(name,PEM_STRING_PARAMETERS))
215 {
216 int slen;
217 const EVP_PKEY_ASN1_METHOD *ameth;
218 slen = pem_check_suffix(nm, "PARAMETERS");
219 if (slen > 0)
220 {
221 ENGINE *e;
222 ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
223 if (ameth)
224 {
225 int r;
226 if (ameth->param_decode)
227 r = 1;
228 else
229 r = 0;
230 #ifndef OPENSSL_NO_ENGINE
231 if (e)
232 ENGINE_finish(e);
233 #endif
234 return r;
235 }
236 }
237 return 0;
238 }
239
240 /* Permit older strings */
241
242 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
243 !strcmp(name,PEM_STRING_X509)) return 1;
244
245 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
246 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
247
248 /* Allow normal certs to be read as trusted certs */
249 if(!strcmp(nm,PEM_STRING_X509) &&
250 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
251
252 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
253 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
254
255 /* Some CAs use PKCS#7 with CERTIFICATE headers */
256 if(!strcmp(nm, PEM_STRING_X509) &&
257 !strcmp(name, PEM_STRING_PKCS7)) return 1;
258
259 if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
260 !strcmp(name, PEM_STRING_PKCS7)) return 1;
261
262 #ifndef OPENSSL_NO_CMS
263 if(!strcmp(nm, PEM_STRING_X509) &&
264 !strcmp(name, PEM_STRING_CMS)) return 1;
265 /* Allow CMS to be read from PKCS#7 headers */
266 if(!strcmp(nm, PEM_STRING_PKCS7) &&
267 !strcmp(name, PEM_STRING_CMS)) return 1;
268 #endif
269
270 return 0;
271 }
272
273 int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
274 pem_password_cb *cb, void *u)
275 {
276 EVP_CIPHER_INFO cipher;
277 char *nm=NULL,*header=NULL;
278 unsigned char *data=NULL;
279 long len;
280 int ret = 0;
281
282 for (;;)
283 {
284 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
285 if(ERR_GET_REASON(ERR_peek_error()) ==
286 PEM_R_NO_START_LINE)
287 ERR_add_error_data(2, "Expecting: ", name);
288 return 0;
289 }
290 if(check_pem(nm, name)) break;
291 OPENSSL_free(nm);
292 OPENSSL_free(header);
293 OPENSSL_free(data);
294 }
295 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
296 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
297
298 *pdata = data;
299 *plen = len;
300
301 if (pnm)
302 *pnm = nm;
303
304 ret = 1;
305
306 err:
307 if (!ret || !pnm) OPENSSL_free(nm);
308 OPENSSL_free(header);
309 if (!ret) OPENSSL_free(data);
310 return ret;
311 }
312
313 #ifndef OPENSSL_NO_FP_API
314 int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
315 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
316 int klen, pem_password_cb *callback, void *u)
317 {
318 BIO *b;
319 int ret;
320
321 if ((b=BIO_new(BIO_s_file())) == NULL)
322 {
323 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
324 return(0);
325 }
326 BIO_set_fp(b,fp,BIO_NOCLOSE);
327 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
328 BIO_free(b);
329 return(ret);
330 }
331 #endif
332
333 int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
334 void *x, const EVP_CIPHER *enc, unsigned char *kstr,
335 int klen, pem_password_cb *callback, void *u)
336 {
337 EVP_CIPHER_CTX ctx;
338 int dsize=0,i,j,ret=0;
339 unsigned char *p,*data=NULL;
340 const char *objstr=NULL;
341 char buf[PEM_BUFSIZE];
342 unsigned char key[EVP_MAX_KEY_LENGTH];
343 unsigned char iv[EVP_MAX_IV_LENGTH];
344
345 if (enc != NULL)
346 {
347 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
348 if (objstr == NULL)
349 {
350 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
351 goto err;
352 }
353 }
354
355 if ((dsize=i2d(x,NULL)) < 0)
356 {
357 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);
358 dsize=0;
359 goto err;
360 }
361 /* dzise + 8 bytes are needed */
362 /* actually it needs the cipher block size extra... */
363 data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
364 if (data == NULL)
365 {
366 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
367 goto err;
368 }
369 p=data;
370 i=i2d(x,&p);
371
372 if (enc != NULL)
373 {
374 if (kstr == NULL)
375 {
376 if (callback == NULL)
377 klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
378 else
379 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
380 if (klen <= 0)
381 {
382 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
383 goto err;
384 }
385 #ifdef CHARSET_EBCDIC
386 /* Convert the pass phrase from EBCDIC */
387 ebcdic2ascii(buf, buf, klen);
388 #endif
389 kstr=(unsigned char *)buf;
390 }
391 RAND_add(data,i,0);/* put in the RSA key. */
392 OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
393 if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
394 goto err;
395 /* The 'iv' is used as the iv and as a salt. It is
396 * NOT taken from the BytesToKey function */
397 if (!EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL))
398 goto err;
399
400 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
401
402 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
403
404 buf[0]='\0';
405 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
406 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
407 /* k=strlen(buf); */
408
409 EVP_CIPHER_CTX_init(&ctx);
410 ret = 1;
411 if (!EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv)
412 || !EVP_EncryptUpdate(&ctx,data,&j,data,i)
413 || !EVP_EncryptFinal_ex(&ctx,&(data[j]),&i))
414 ret = 0;
415 EVP_CIPHER_CTX_cleanup(&ctx);
416 if (ret == 0)
417 goto err;
418 i+=j;
419 }
420 else
421 {
422 ret=1;
423 buf[0]='\0';
424 }
425 i=PEM_write_bio(bp,name,buf,data,i);
426 if (i <= 0) ret=0;
427 err:
428 OPENSSL_cleanse(key,sizeof(key));
429 OPENSSL_cleanse(iv,sizeof(iv));
430 OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
431 OPENSSL_cleanse(buf,PEM_BUFSIZE);
432 if (data != NULL)
433 {
434 OPENSSL_cleanse(data,(unsigned int)dsize);
435 OPENSSL_free(data);
436 }
437 return(ret);
438 }
439
440 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
441 pem_password_cb *callback,void *u)
442 {
443 int i,j,o,klen;
444 long len;
445 EVP_CIPHER_CTX ctx;
446 unsigned char key[EVP_MAX_KEY_LENGTH];
447 char buf[PEM_BUFSIZE];
448
449 len= *plen;
450
451 if (cipher->cipher == NULL) return(1);
452 if (callback == NULL)
453 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
454 else
455 klen=callback(buf,PEM_BUFSIZE,0,u);
456 if (klen <= 0)
457 {
458 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
459 return(0);
460 }
461 #ifdef CHARSET_EBCDIC
462 /* Convert the pass phrase from EBCDIC */
463 ebcdic2ascii(buf, buf, klen);
464 #endif
465
466 if (!EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
467 (unsigned char *)buf,klen,1,key,NULL))
468 return 0;
469
470 j=(int)len;
471 EVP_CIPHER_CTX_init(&ctx);
472 o = EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
473 if (o)
474 o = EVP_DecryptUpdate(&ctx,data,&i,data,j);
475 if (o)
476 o = EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
477 EVP_CIPHER_CTX_cleanup(&ctx);
478 OPENSSL_cleanse((char *)buf,sizeof(buf));
479 OPENSSL_cleanse((char *)key,sizeof(key));
480 j+=i;
481 if (!o)
482 {
483 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
484 return(0);
485 }
486 *plen=j;
487 return(1);
488 }
489
490 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
491 {
492 const EVP_CIPHER *enc=NULL;
493 char *p,c;
494 char **header_pp = &header;
495
496 cipher->cipher=NULL;
497 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
498 return(1);
499 if (strncmp(header,"Proc-Type: ",11) != 0)
500 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
501 header+=11;
502 if (*header != '4') return(0); header++;
503 if (*header != ',') return(0); header++;
504 if (strncmp(header,"ENCRYPTED",9) != 0)
505 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
506 for (; (*header != '\n') && (*header != '\0'); header++)
507 ;
508 if (*header == '\0')
509 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
510 header++;
511 if (strncmp(header,"DEK-Info: ",10) != 0)
512 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
513 header+=10;
514
515 p=header;
516 for (;;)
517 {
518 c= *header;
519 #ifndef CHARSET_EBCDIC
520 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
521 ((c >= '0') && (c <= '9'))))
522 break;
523 #else
524 if (!( isupper(c) || (c == '-') ||
525 isdigit(c)))
526 break;
527 #endif
528 header++;
529 }
530 *header='\0';
531 cipher->cipher=enc=EVP_get_cipherbyname(p);
532 *header=c;
533 header++;
534
535 if (enc == NULL)
536 {
537 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
538 return(0);
539 }
540 if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))
541 return(0);
542
543 return(1);
544 }
545
546 static int load_iv(char **fromp, unsigned char *to, int num)
547 {
548 int v,i;
549 char *from;
550
551 from= *fromp;
552 for (i=0; i<num; i++) to[i]=0;
553 num*=2;
554 for (i=0; i<num; i++)
555 {
556 if ((*from >= '0') && (*from <= '9'))
557 v= *from-'0';
558 else if ((*from >= 'A') && (*from <= 'F'))
559 v= *from-'A'+10;
560 else if ((*from >= 'a') && (*from <= 'f'))
561 v= *from-'a'+10;
562 else
563 {
564 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
565 return(0);
566 }
567 from++;
568 to[i/2]|=v<<(long)((!(i&1))*4);
569 }
570
571 *fromp=from;
572 return(1);
573 }
574
575 #ifndef OPENSSL_NO_FP_API
576 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
577 long len)
578 {
579 BIO *b;
580 int ret;
581
582 if ((b=BIO_new(BIO_s_file())) == NULL)
583 {
584 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
585 return(0);
586 }
587 BIO_set_fp(b,fp,BIO_NOCLOSE);
588 ret=PEM_write_bio(b, name, header, data,len);
589 BIO_free(b);
590 return(ret);
591 }
592 #endif
593
594 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
595 long len)
596 {
597 int nlen,n,i,j,outl;
598 unsigned char *buf = NULL;
599 EVP_ENCODE_CTX ctx;
600 int reason=ERR_R_BUF_LIB;
601
602 EVP_EncodeInit(&ctx);
603 nlen=strlen(name);
604
605 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
606 (BIO_write(bp,name,nlen) != nlen) ||
607 (BIO_write(bp,"-----\n",6) != 6))
608 goto err;
609
610 i=strlen(header);
611 if (i > 0)
612 {
613 if ( (BIO_write(bp,header,i) != i) ||
614 (BIO_write(bp,"\n",1) != 1))
615 goto err;
616 }
617
618 buf = OPENSSL_malloc(PEM_BUFSIZE*8);
619 if (buf == NULL)
620 {
621 reason=ERR_R_MALLOC_FAILURE;
622 goto err;
623 }
624
625 i=j=0;
626 while (len > 0)
627 {
628 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
629 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
630 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
631 goto err;
632 i+=outl;
633 len-=n;
634 j+=n;
635 }
636 EVP_EncodeFinal(&ctx,buf,&outl);
637 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
638 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
639 OPENSSL_free(buf);
640 buf = NULL;
641 if ( (BIO_write(bp,"-----END ",9) != 9) ||
642 (BIO_write(bp,name,nlen) != nlen) ||
643 (BIO_write(bp,"-----\n",6) != 6))
644 goto err;
645 return(i+outl);
646 err:
647 if (buf) {
648 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
649 OPENSSL_free(buf);
650 }
651 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
652 return(0);
653 }
654
655 #ifndef OPENSSL_NO_FP_API
656 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
657 long *len)
658 {
659 BIO *b;
660 int ret;
661
662 if ((b=BIO_new(BIO_s_file())) == NULL)
663 {
664 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
665 return(0);
666 }
667 BIO_set_fp(b,fp,BIO_NOCLOSE);
668 ret=PEM_read_bio(b, name, header, data,len);
669 BIO_free(b);
670 return(ret);
671 }
672 #endif
673
674 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
675 long *len)
676 {
677 EVP_ENCODE_CTX ctx;
678 int end=0,i,k,bl=0,hl=0,nohead=0;
679 char buf[256];
680 BUF_MEM *nameB;
681 BUF_MEM *headerB;
682 BUF_MEM *dataB,*tmpB;
683
684 nameB=BUF_MEM_new();
685 headerB=BUF_MEM_new();
686 dataB=BUF_MEM_new();
687 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
688 {
689 BUF_MEM_free(nameB);
690 BUF_MEM_free(headerB);
691 BUF_MEM_free(dataB);
692 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
693 return(0);
694 }
695
696 buf[254]='\0';
697 for (;;)
698 {
699 i=BIO_gets(bp,buf,254);
700
701 if (i <= 0)
702 {
703 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
704 goto err;
705 }
706
707 while ((i >= 0) && (buf[i] <= ' ')) i--;
708 buf[++i]='\n'; buf[++i]='\0';
709
710 if (strncmp(buf,"-----BEGIN ",11) == 0)
711 {
712 i=strlen(&(buf[11]));
713
714 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
715 continue;
716 if (!BUF_MEM_grow(nameB,i+9))
717 {
718 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
719 goto err;
720 }
721 memcpy(nameB->data,&(buf[11]),i-6);
722 nameB->data[i-6]='\0';
723 break;
724 }
725 }
726 hl=0;
727 if (!BUF_MEM_grow(headerB,256))
728 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
729 headerB->data[0]='\0';
730 for (;;)
731 {
732 i=BIO_gets(bp,buf,254);
733 if (i <= 0) break;
734
735 while ((i >= 0) && (buf[i] <= ' ')) i--;
736 buf[++i]='\n'; buf[++i]='\0';
737
738 if (buf[0] == '\n') break;
739 if (!BUF_MEM_grow(headerB,hl+i+9))
740 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
741 if (strncmp(buf,"-----END ",9) == 0)
742 {
743 nohead=1;
744 break;
745 }
746 memcpy(&(headerB->data[hl]),buf,i);
747 headerB->data[hl+i]='\0';
748 hl+=i;
749 }
750
751 bl=0;
752 if (!BUF_MEM_grow(dataB,1024))
753 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
754 dataB->data[0]='\0';
755 if (!nohead)
756 {
757 for (;;)
758 {
759 i=BIO_gets(bp,buf,254);
760 if (i <= 0) break;
761
762 while ((i >= 0) && (buf[i] <= ' ')) i--;
763 buf[++i]='\n'; buf[++i]='\0';
764
765 if (i != 65) end=1;
766 if (strncmp(buf,"-----END ",9) == 0)
767 break;
768 if (i > 65) break;
769 if (!BUF_MEM_grow_clean(dataB,i+bl+9))
770 {
771 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
772 goto err;
773 }
774 memcpy(&(dataB->data[bl]),buf,i);
775 dataB->data[bl+i]='\0';
776 bl+=i;
777 if (end)
778 {
779 buf[0]='\0';
780 i=BIO_gets(bp,buf,254);
781 if (i <= 0) break;
782
783 while ((i >= 0) && (buf[i] <= ' ')) i--;
784 buf[++i]='\n'; buf[++i]='\0';
785
786 break;
787 }
788 }
789 }
790 else
791 {
792 tmpB=headerB;
793 headerB=dataB;
794 dataB=tmpB;
795 bl=hl;
796 }
797 i=strlen(nameB->data);
798 if ( (strncmp(buf,"-----END ",9) != 0) ||
799 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
800 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
801 {
802 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
803 goto err;
804 }
805
806 EVP_DecodeInit(&ctx);
807 i=EVP_DecodeUpdate(&ctx,
808 (unsigned char *)dataB->data,&bl,
809 (unsigned char *)dataB->data,bl);
810 if (i < 0)
811 {
812 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
813 goto err;
814 }
815 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
816 if (i < 0)
817 {
818 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
819 goto err;
820 }
821 bl+=k;
822
823 if (bl == 0) goto err;
824 *name=nameB->data;
825 *header=headerB->data;
826 *data=(unsigned char *)dataB->data;
827 *len=bl;
828 OPENSSL_free(nameB);
829 OPENSSL_free(headerB);
830 OPENSSL_free(dataB);
831 return(1);
832 err:
833 BUF_MEM_free(nameB);
834 BUF_MEM_free(headerB);
835 BUF_MEM_free(dataB);
836 return(0);
837 }
838
839 /* Check pem string and return prefix length.
840 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
841 * the return value is 3 for the string "RSA".
842 */
843
844 int pem_check_suffix(const char *pem_str, const char *suffix)
845 {
846 int pem_len = strlen(pem_str);
847 int suffix_len = strlen(suffix);
848 const char *p;
849 if (suffix_len + 1 >= pem_len)
850 return 0;
851 p = pem_str + pem_len - suffix_len;
852 if (strcmp(p, suffix))
853 return 0;
854 p--;
855 if (*p != ' ')
856 return 0;
857 return p - pem_str;
858 }