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diff --git a/src/lib/libcrypto/pem/pem_lib.c b/src/lib/libcrypto/pem/pem_lib.c
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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
77const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
78
79#define MIN_LENGTH 4
80
81static int load_iv(char **fromp,unsigned char *to, int num);
82static int check_pem(const char *nm, const char *name);
83int pem_check_suffix(const char *pem_str, const char *suffix);
84
85int 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
127void 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
145void 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
167void *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
185static 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
273int 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
306err:
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
314int 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
333int 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 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
398
399 if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
400
401 OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
402
403 buf[0]='\0';
404 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
405 PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
406 /* k=strlen(buf); */
407
408 EVP_CIPHER_CTX_init(&ctx);
409 EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
410 EVP_EncryptUpdate(&ctx,data,&j,data,i);
411 EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
412 EVP_CIPHER_CTX_cleanup(&ctx);
413 i+=j;
414 ret=1;
415 }
416 else
417 {
418 ret=1;
419 buf[0]='\0';
420 }
421 i=PEM_write_bio(bp,name,buf,data,i);
422 if (i <= 0) ret=0;
423err:
424 OPENSSL_cleanse(key,sizeof(key));
425 OPENSSL_cleanse(iv,sizeof(iv));
426 OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
427 OPENSSL_cleanse(buf,PEM_BUFSIZE);
428 if (data != NULL)
429 {
430 OPENSSL_cleanse(data,(unsigned int)dsize);
431 OPENSSL_free(data);
432 }
433 return(ret);
434 }
435
436int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
437 pem_password_cb *callback,void *u)
438 {
439 int i,j,o,klen;
440 long len;
441 EVP_CIPHER_CTX ctx;
442 unsigned char key[EVP_MAX_KEY_LENGTH];
443 char buf[PEM_BUFSIZE];
444
445 len= *plen;
446
447 if (cipher->cipher == NULL) return(1);
448 if (callback == NULL)
449 klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
450 else
451 klen=callback(buf,PEM_BUFSIZE,0,u);
452 if (klen <= 0)
453 {
454 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
455 return(0);
456 }
457#ifdef CHARSET_EBCDIC
458 /* Convert the pass phrase from EBCDIC */
459 ebcdic2ascii(buf, buf, klen);
460#endif
461
462 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
463 (unsigned char *)buf,klen,1,key,NULL);
464
465 j=(int)len;
466 EVP_CIPHER_CTX_init(&ctx);
467 EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
468 EVP_DecryptUpdate(&ctx,data,&i,data,j);
469 o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
470 EVP_CIPHER_CTX_cleanup(&ctx);
471 OPENSSL_cleanse((char *)buf,sizeof(buf));
472 OPENSSL_cleanse((char *)key,sizeof(key));
473 j+=i;
474 if (!o)
475 {
476 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
477 return(0);
478 }
479 *plen=j;
480 return(1);
481 }
482
483int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
484 {
485 const EVP_CIPHER *enc=NULL;
486 char *p,c;
487 char **header_pp = &header;
488
489 cipher->cipher=NULL;
490 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
491 return(1);
492 if (strncmp(header,"Proc-Type: ",11) != 0)
493 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
494 header+=11;
495 if (*header != '4') return(0); header++;
496 if (*header != ',') return(0); header++;
497 if (strncmp(header,"ENCRYPTED",9) != 0)
498 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
499 for (; (*header != '\n') && (*header != '\0'); header++)
500 ;
501 if (*header == '\0')
502 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
503 header++;
504 if (strncmp(header,"DEK-Info: ",10) != 0)
505 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
506 header+=10;
507
508 p=header;
509 for (;;)
510 {
511 c= *header;
512#ifndef CHARSET_EBCDIC
513 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
514 ((c >= '0') && (c <= '9'))))
515 break;
516#else
517 if (!( isupper(c) || (c == '-') ||
518 isdigit(c)))
519 break;
520#endif
521 header++;
522 }
523 *header='\0';
524 cipher->cipher=enc=EVP_get_cipherbyname(p);
525 *header=c;
526 header++;
527
528 if (enc == NULL)
529 {
530 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
531 return(0);
532 }
533 if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))
534 return(0);
535
536 return(1);
537 }
538
539static int load_iv(char **fromp, unsigned char *to, int num)
540 {
541 int v,i;
542 char *from;
543
544 from= *fromp;
545 for (i=0; i<num; i++) to[i]=0;
546 num*=2;
547 for (i=0; i<num; i++)
548 {
549 if ((*from >= '0') && (*from <= '9'))
550 v= *from-'0';
551 else if ((*from >= 'A') && (*from <= 'F'))
552 v= *from-'A'+10;
553 else if ((*from >= 'a') && (*from <= 'f'))
554 v= *from-'a'+10;
555 else
556 {
557 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
558 return(0);
559 }
560 from++;
561 to[i/2]|=v<<(long)((!(i&1))*4);
562 }
563
564 *fromp=from;
565 return(1);
566 }
567
568#ifndef OPENSSL_NO_FP_API
569int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
570 long len)
571 {
572 BIO *b;
573 int ret;
574
575 if ((b=BIO_new(BIO_s_file())) == NULL)
576 {
577 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
578 return(0);
579 }
580 BIO_set_fp(b,fp,BIO_NOCLOSE);
581 ret=PEM_write_bio(b, name, header, data,len);
582 BIO_free(b);
583 return(ret);
584 }
585#endif
586
587int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
588 long len)
589 {
590 int nlen,n,i,j,outl;
591 unsigned char *buf = NULL;
592 EVP_ENCODE_CTX ctx;
593 int reason=ERR_R_BUF_LIB;
594
595 EVP_EncodeInit(&ctx);
596 nlen=strlen(name);
597
598 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
599 (BIO_write(bp,name,nlen) != nlen) ||
600 (BIO_write(bp,"-----\n",6) != 6))
601 goto err;
602
603 i=strlen(header);
604 if (i > 0)
605 {
606 if ( (BIO_write(bp,header,i) != i) ||
607 (BIO_write(bp,"\n",1) != 1))
608 goto err;
609 }
610
611 buf = OPENSSL_malloc(PEM_BUFSIZE*8);
612 if (buf == NULL)
613 {
614 reason=ERR_R_MALLOC_FAILURE;
615 goto err;
616 }
617
618 i=j=0;
619 while (len > 0)
620 {
621 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
622 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
623 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
624 goto err;
625 i+=outl;
626 len-=n;
627 j+=n;
628 }
629 EVP_EncodeFinal(&ctx,buf,&outl);
630 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
631 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
632 OPENSSL_free(buf);
633 buf = NULL;
634 if ( (BIO_write(bp,"-----END ",9) != 9) ||
635 (BIO_write(bp,name,nlen) != nlen) ||
636 (BIO_write(bp,"-----\n",6) != 6))
637 goto err;
638 return(i+outl);
639err:
640 if (buf) {
641 OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
642 OPENSSL_free(buf);
643 }
644 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
645 return(0);
646 }
647
648#ifndef OPENSSL_NO_FP_API
649int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
650 long *len)
651 {
652 BIO *b;
653 int ret;
654
655 if ((b=BIO_new(BIO_s_file())) == NULL)
656 {
657 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
658 return(0);
659 }
660 BIO_set_fp(b,fp,BIO_NOCLOSE);
661 ret=PEM_read_bio(b, name, header, data,len);
662 BIO_free(b);
663 return(ret);
664 }
665#endif
666
667int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
668 long *len)
669 {
670 EVP_ENCODE_CTX ctx;
671 int end=0,i,k,bl=0,hl=0,nohead=0;
672 char buf[256];
673 BUF_MEM *nameB;
674 BUF_MEM *headerB;
675 BUF_MEM *dataB,*tmpB;
676
677 nameB=BUF_MEM_new();
678 headerB=BUF_MEM_new();
679 dataB=BUF_MEM_new();
680 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
681 {
682 BUF_MEM_free(nameB);
683 BUF_MEM_free(headerB);
684 BUF_MEM_free(dataB);
685 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
686 return(0);
687 }
688
689 buf[254]='\0';
690 for (;;)
691 {
692 i=BIO_gets(bp,buf,254);
693
694 if (i <= 0)
695 {
696 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
697 goto err;
698 }
699
700 while ((i >= 0) && (buf[i] <= ' ')) i--;
701 buf[++i]='\n'; buf[++i]='\0';
702
703 if (strncmp(buf,"-----BEGIN ",11) == 0)
704 {
705 i=strlen(&(buf[11]));
706
707 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
708 continue;
709 if (!BUF_MEM_grow(nameB,i+9))
710 {
711 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
712 goto err;
713 }
714 memcpy(nameB->data,&(buf[11]),i-6);
715 nameB->data[i-6]='\0';
716 break;
717 }
718 }
719 hl=0;
720 if (!BUF_MEM_grow(headerB,256))
721 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
722 headerB->data[0]='\0';
723 for (;;)
724 {
725 i=BIO_gets(bp,buf,254);
726 if (i <= 0) break;
727
728 while ((i >= 0) && (buf[i] <= ' ')) i--;
729 buf[++i]='\n'; buf[++i]='\0';
730
731 if (buf[0] == '\n') break;
732 if (!BUF_MEM_grow(headerB,hl+i+9))
733 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
734 if (strncmp(buf,"-----END ",9) == 0)
735 {
736 nohead=1;
737 break;
738 }
739 memcpy(&(headerB->data[hl]),buf,i);
740 headerB->data[hl+i]='\0';
741 hl+=i;
742 }
743
744 bl=0;
745 if (!BUF_MEM_grow(dataB,1024))
746 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
747 dataB->data[0]='\0';
748 if (!nohead)
749 {
750 for (;;)
751 {
752 i=BIO_gets(bp,buf,254);
753 if (i <= 0) break;
754
755 while ((i >= 0) && (buf[i] <= ' ')) i--;
756 buf[++i]='\n'; buf[++i]='\0';
757
758 if (i != 65) end=1;
759 if (strncmp(buf,"-----END ",9) == 0)
760 break;
761 if (i > 65) break;
762 if (!BUF_MEM_grow_clean(dataB,i+bl+9))
763 {
764 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
765 goto err;
766 }
767 memcpy(&(dataB->data[bl]),buf,i);
768 dataB->data[bl+i]='\0';
769 bl+=i;
770 if (end)
771 {
772 buf[0]='\0';
773 i=BIO_gets(bp,buf,254);
774 if (i <= 0) break;
775
776 while ((i >= 0) && (buf[i] <= ' ')) i--;
777 buf[++i]='\n'; buf[++i]='\0';
778
779 break;
780 }
781 }
782 }
783 else
784 {
785 tmpB=headerB;
786 headerB=dataB;
787 dataB=tmpB;
788 bl=hl;
789 }
790 i=strlen(nameB->data);
791 if ( (strncmp(buf,"-----END ",9) != 0) ||
792 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
793 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
794 {
795 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
796 goto err;
797 }
798
799 EVP_DecodeInit(&ctx);
800 i=EVP_DecodeUpdate(&ctx,
801 (unsigned char *)dataB->data,&bl,
802 (unsigned char *)dataB->data,bl);
803 if (i < 0)
804 {
805 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
806 goto err;
807 }
808 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
809 if (i < 0)
810 {
811 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
812 goto err;
813 }
814 bl+=k;
815
816 if (bl == 0) goto err;
817 *name=nameB->data;
818 *header=headerB->data;
819 *data=(unsigned char *)dataB->data;
820 *len=bl;
821 OPENSSL_free(nameB);
822 OPENSSL_free(headerB);
823 OPENSSL_free(dataB);
824 return(1);
825err:
826 BUF_MEM_free(nameB);
827 BUF_MEM_free(headerB);
828 BUF_MEM_free(dataB);
829 return(0);
830 }
831
832/* Check pem string and return prefix length.
833 * If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
834 * the return value is 3 for the string "RSA".
835 */
836
837int pem_check_suffix(const char *pem_str, const char *suffix)
838 {
839 int pem_len = strlen(pem_str);
840 int suffix_len = strlen(suffix);
841 const char *p;
842 if (suffix_len + 1 >= pem_len)
843 return 0;
844 p = pem_str + pem_len - suffix_len;
845 if (strcmp(p, suffix))
846 return 0;
847 p--;
848 if (*p != ' ')
849 return 0;
850 return p - pem_str;
851 }
852
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