1 /* crypto/pem/pem_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
61 #include <openssl/buffer.h>
62 #include <openssl/objects.h>
63 #include <openssl/evp.h>
64 #include <openssl/rand.h>
65 #include <openssl/x509.h>
66 #include <openssl/pem.h>
67 #include <openssl/pkcs12.h>
69 #include <openssl/des.h>
72 const char *PEM_version="PEM" OPENSSL_VERSION_PTEXT;
76 static int def_callback(char *buf, int num, int w, void *userdata);
77 static int load_iv(unsigned char **fromp,unsigned char *to, int num);
78 static int check_pem(const char *nm, const char *name);
80 static int def_callback(char *buf, int num, int w, void *userdata)
83 /* We should not ever call the default callback routine from
85 PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
91 prompt=EVP_get_pw_prompt();
93 prompt="Enter PEM pass phrase:";
97 i=EVP_read_pw_string(buf,num,prompt,w);
100 PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
101 memset(buf,0,(unsigned int)num);
107 fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
116 void PEM_proc_type(char *buf, int type)
120 if (type == PEM_TYPE_ENCRYPTED)
122 else if (type == PEM_TYPE_MIC_CLEAR)
124 else if (type == PEM_TYPE_MIC_ONLY)
129 strcat(buf,"Proc-Type: 4,");
134 void PEM_dek_info(char *buf, const char *type, int len, char *str)
136 static unsigned char map[17]="0123456789ABCDEF";
140 strcat(buf,"DEK-Info: ");
144 for (i=0; i<len; i++)
146 buf[j+i*2] =map[(str[i]>>4)&0x0f];
147 buf[j+i*2+1]=map[(str[i] )&0x0f];
154 char *PEM_ASN1_read(char *(*d2i)(), const char *name, FILE *fp, char **x,
155 pem_password_cb *cb, void *u)
160 if ((b=BIO_new(BIO_s_file())) == NULL)
162 PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
165 BIO_set_fp(b,fp,BIO_NOCLOSE);
166 ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
172 static int check_pem(const char *nm, const char *name)
174 /* Normal matching nm and name */
175 if (!strcmp(nm,name)) return 1;
177 /* Make PEM_STRING_EVP_PKEY match any private key */
179 if(!strcmp(nm,PEM_STRING_PKCS8) &&
180 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
182 if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
183 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
185 if(!strcmp(nm,PEM_STRING_RSA) &&
186 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
188 if(!strcmp(nm,PEM_STRING_DSA) &&
189 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
191 /* Permit older strings */
193 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
194 !strcmp(name,PEM_STRING_X509)) return 1;
196 if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
197 !strcmp(name,PEM_STRING_X509_REQ)) return 1;
199 /* Allow normal certs to be read as trusted certs */
200 if(!strcmp(nm,PEM_STRING_X509) &&
201 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
203 if(!strcmp(nm,PEM_STRING_X509_OLD) &&
204 !strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
209 char *PEM_ASN1_read_bio(char *(*d2i)(), const char *name, BIO *bp, char **x,
210 pem_password_cb *cb, void *u)
212 EVP_CIPHER_INFO cipher;
213 char *nm=NULL,*header=NULL;
214 unsigned char *p=NULL,*data=NULL;
220 if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
221 if(ERR_GET_REASON(ERR_peek_error()) ==
223 ERR_add_error_data(2, "Expecting: ", name);
226 if(check_pem(nm, name)) break;
231 if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
232 if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
234 if (strcmp(name,PEM_STRING_EVP_PKEY) == 0) {
235 if (strcmp(nm,PEM_STRING_RSA) == 0)
236 ret=d2i(EVP_PKEY_RSA,x,&p,len);
237 else if (strcmp(nm,PEM_STRING_DSA) == 0)
238 ret=d2i(EVP_PKEY_DSA,x,&p,len);
239 else if (strcmp(nm,PEM_STRING_PKCS8INF) == 0) {
240 PKCS8_PRIV_KEY_INFO *p8inf;
241 p8inf=d2i_PKCS8_PRIV_KEY_INFO(
242 (PKCS8_PRIV_KEY_INFO **) x, &p, len);
243 ret = (char *)EVP_PKCS82PKEY(p8inf);
244 PKCS8_PRIV_KEY_INFO_free(p8inf);
245 } else if (strcmp(nm,PEM_STRING_PKCS8) == 0) {
246 PKCS8_PRIV_KEY_INFO *p8inf;
249 char psbuf[PEM_BUFSIZE];
250 p8 = d2i_X509_SIG((X509_SIG **)x, &p, len);
252 if (cb) klen=cb(psbuf,PEM_BUFSIZE,0,u);
253 else klen=def_callback(psbuf,PEM_BUFSIZE,0,u);
255 PEMerr(PEM_F_PEM_ASN1_READ_BIO,
256 PEM_R_BAD_PASSWORD_READ);
259 p8inf = M_PKCS8_decrypt(p8, psbuf, klen);
261 if(!p8inf) goto p8err;
262 ret = (char *)EVP_PKCS82PKEY(p8inf);
263 PKCS8_PRIV_KEY_INFO_free(p8inf);
265 } else ret=d2i(x,&p,len);
268 PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
277 int PEM_ASN1_write(int (*i2d)(), const char *name, FILE *fp, char *x,
278 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
279 pem_password_cb *callback, void *u)
284 if ((b=BIO_new(BIO_s_file())) == NULL)
286 PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
289 BIO_set_fp(b,fp,BIO_NOCLOSE);
290 ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
296 int PEM_ASN1_write_bio(int (*i2d)(), const char *name, BIO *bp, char *x,
297 const EVP_CIPHER *enc, unsigned char *kstr, int klen,
298 pem_password_cb *callback, void *u)
301 int dsize=0,i,j,ret=0;
302 unsigned char *p,*data=NULL;
303 const char *objstr=NULL;
304 char buf[PEM_BUFSIZE];
305 unsigned char key[EVP_MAX_KEY_LENGTH];
306 unsigned char iv[EVP_MAX_IV_LENGTH];
310 objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
313 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
318 if ((dsize=i2d(x,NULL)) < 0)
320 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
324 /* dzise + 8 bytes are needed */
325 data=(unsigned char *)Malloc((unsigned int)dsize+20);
328 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
338 if (callback == NULL)
339 klen=def_callback(buf,PEM_BUFSIZE,1,u);
341 klen=(*callback)(buf,PEM_BUFSIZE,1,u);
344 PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
347 #ifdef CHARSET_EBCDIC
348 /* Convert the pass phrase from EBCDIC */
349 ebcdic2ascii(buf, buf, klen);
351 kstr=(unsigned char *)buf;
353 RAND_seed(data,i);/* put in the RSA key. */
354 RAND_bytes(iv,8); /* Generate a salt */
355 /* The 'iv' is used as the iv and as a salt. It is
356 * NOT taken from the BytesToKey function */
357 EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
359 if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
362 PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
363 PEM_dek_info(buf,objstr,8,(char *)iv);
366 EVP_EncryptInit(&ctx,enc,key,iv);
367 EVP_EncryptUpdate(&ctx,data,&j,data,i);
368 EVP_EncryptFinal(&ctx,&(data[j]),&i);
377 i=PEM_write_bio(bp,name,buf,data,i);
380 memset(key,0,sizeof(key));
381 memset(iv,0,sizeof(iv));
382 memset((char *)&ctx,0,sizeof(ctx));
383 memset(buf,0,PEM_BUFSIZE);
384 memset(data,0,(unsigned int)dsize);
389 int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
390 pem_password_cb *callback,void *u)
395 unsigned char key[EVP_MAX_KEY_LENGTH];
396 char buf[PEM_BUFSIZE];
400 if (cipher->cipher == NULL) return(1);
401 if (callback == NULL)
402 klen=def_callback(buf,PEM_BUFSIZE,0,u);
404 klen=callback(buf,PEM_BUFSIZE,0,u);
407 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
410 #ifdef CHARSET_EBCDIC
411 /* Convert the pass phrase from EBCDIC */
412 ebcdic2ascii(buf, buf, klen);
415 EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
416 (unsigned char *)buf,klen,1,key,NULL);
419 EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
420 EVP_DecryptUpdate(&ctx,data,&i,data,j);
421 o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
422 EVP_CIPHER_CTX_cleanup(&ctx);
423 memset((char *)buf,0,sizeof(buf));
424 memset((char *)key,0,sizeof(key));
428 PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
435 int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
438 const EVP_CIPHER *enc=NULL;
442 if ((header == NULL) || (*header == '\0') || (*header == '\n'))
444 if (strncmp(header,"Proc-Type: ",11) != 0)
445 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
447 if (*header != '4') return(0); header++;
448 if (*header != ',') return(0); header++;
449 if (strncmp(header,"ENCRYPTED",9) != 0)
450 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
451 for (; (*header != '\n') && (*header != '\0'); header++)
454 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
456 if (strncmp(header,"DEK-Info: ",10) != 0)
457 { PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
464 #ifndef CHARSET_EBCDIC
465 if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
466 ((c >= '0') && (c <= '9'))))
469 if (!( isupper(c) || (c == '-') ||
477 cipher->cipher=enc=EVP_get_cipherbyname(p);
483 PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
486 if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
491 static int load_iv(unsigned char **fromp, unsigned char *to, int num)
497 for (i=0; i<num; i++) to[i]=0;
499 for (i=0; i<num; i++)
501 if ((*from >= '0') && (*from <= '9'))
503 else if ((*from >= 'A') && (*from <= 'F'))
505 else if ((*from >= 'a') && (*from <= 'f'))
509 PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
513 to[i/2]|=v<<(long)((!(i&1))*4);
521 int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
527 if ((b=BIO_new(BIO_s_file())) == NULL)
529 PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
532 BIO_set_fp(b,fp,BIO_NOCLOSE);
533 ret=PEM_write_bio(b, name, header, data,len);
539 int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
545 int reason=ERR_R_BUF_LIB;
547 EVP_EncodeInit(&ctx);
550 if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
551 (BIO_write(bp,name,nlen) != nlen) ||
552 (BIO_write(bp,"-----\n",6) != 6))
558 if ( (BIO_write(bp,header,i) != i) ||
559 (BIO_write(bp,"\n",1) != 1))
563 buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
566 reason=ERR_R_MALLOC_FAILURE;
573 n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
574 EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
575 if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
581 EVP_EncodeFinal(&ctx,buf,&outl);
582 if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
584 if ( (BIO_write(bp,"-----END ",9) != 9) ||
585 (BIO_write(bp,name,nlen) != nlen) ||
586 (BIO_write(bp,"-----\n",6) != 6))
590 PEMerr(PEM_F_PEM_WRITE_BIO,reason);
595 int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
601 if ((b=BIO_new(BIO_s_file())) == NULL)
603 PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
606 BIO_set_fp(b,fp,BIO_NOCLOSE);
607 ret=PEM_read_bio(b, name, header, data,len);
613 int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
617 int end=0,i,k,bl=0,hl=0,nohead=0;
621 BUF_MEM *dataB,*tmpB;
624 headerB=BUF_MEM_new();
626 if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
628 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
635 i=BIO_gets(bp,buf,254);
639 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
643 while ((i >= 0) && (buf[i] <= ' ')) i--;
644 buf[++i]='\n'; buf[++i]='\0';
646 if (strncmp(buf,"-----BEGIN ",11) == 0)
648 i=strlen(&(buf[11]));
650 if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
652 if (!BUF_MEM_grow(nameB,i+9))
654 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
657 memcpy(nameB->data,&(buf[11]),i-6);
658 nameB->data[i-6]='\0';
663 if (!BUF_MEM_grow(headerB,256))
664 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
665 headerB->data[0]='\0';
668 i=BIO_gets(bp,buf,254);
671 while ((i >= 0) && (buf[i] <= ' ')) i--;
672 buf[++i]='\n'; buf[++i]='\0';
674 if (buf[0] == '\n') break;
675 if (!BUF_MEM_grow(headerB,hl+i+9))
676 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
677 if (strncmp(buf,"-----END ",9) == 0)
682 memcpy(&(headerB->data[hl]),buf,i);
683 headerB->data[hl+i]='\0';
688 if (!BUF_MEM_grow(dataB,1024))
689 { PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
695 i=BIO_gets(bp,buf,254);
698 while ((i >= 0) && (buf[i] <= ' ')) i--;
699 buf[++i]='\n'; buf[++i]='\0';
702 if (strncmp(buf,"-----END ",9) == 0)
705 if (!BUF_MEM_grow(dataB,i+bl+9))
707 PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
710 memcpy(&(dataB->data[bl]),buf,i);
711 dataB->data[bl+i]='\0';
716 i=BIO_gets(bp,buf,254);
719 while ((i >= 0) && (buf[i] <= ' ')) i--;
720 buf[++i]='\n'; buf[++i]='\0';
733 i=strlen(nameB->data);
734 if ( (strncmp(buf,"-----END ",9) != 0) ||
735 (strncmp(nameB->data,&(buf[9]),i) != 0) ||
736 (strncmp(&(buf[9+i]),"-----\n",6) != 0))
738 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
742 EVP_DecodeInit(&ctx);
743 i=EVP_DecodeUpdate(&ctx,
744 (unsigned char *)dataB->data,&bl,
745 (unsigned char *)dataB->data,bl);
748 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
751 i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
754 PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
759 if (bl == 0) goto err;
761 *header=headerB->data;
762 *data=(unsigned char *)dataB->data;
770 BUF_MEM_free(headerB);
775 /* This function writes a private key in PKCS#8 format: it is a "drop in"
776 * replacement for PEM_write_bio_PrivateKey(). As usual if 'enc' is NULL then
777 * it uses the unencrypted private key form. It uses PKCS#5 v2.0 password based
778 * encryption algorithms.
781 int PEM_write_bio_PKCS8PrivateKey(BIO *bp, EVP_PKEY *x, const EVP_CIPHER *enc,
782 char *kstr, int klen,
783 pem_password_cb *cb, void *u)
786 PKCS8_PRIV_KEY_INFO *p8inf;
787 char buf[PEM_BUFSIZE];
789 if(!(p8inf = EVP_PKEY2PKCS8(x))) {
790 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
791 PEM_R_ERROR_CONVERTING_PRIVATE_KEY);
796 if(!cb) klen = def_callback(buf, PEM_BUFSIZE, 1, u);
797 else klen = cb(buf, PEM_BUFSIZE, 1, u);
799 PEMerr(PEM_F_PEM_WRITE_BIO_PKCS8PRIVATEKEY,
801 PKCS8_PRIV_KEY_INFO_free(p8inf);
807 p8 = PKCS8_encrypt(-1, enc, kstr, klen, NULL, 0, 0, p8inf);
808 if(kstr == buf) memset(buf, 0, klen);
809 PKCS8_PRIV_KEY_INFO_free(p8inf);
810 ret = PEM_write_bio_PKCS8(bp, p8);
814 ret = PEM_write_bio_PKCS8_PRIV_KEY_INFO(bp, p8inf);
815 PKCS8_PRIV_KEY_INFO_free(p8inf);
820 int PEM_write_PKCS8PrivateKey(FILE *fp, EVP_PKEY *x, const EVP_CIPHER *enc,
821 char *kstr, int klen, pem_password_cb *cb, void *u)
825 if(!(bp = BIO_new_fp(fp, BIO_NOCLOSE))) {
826 PEMerr(PEM_F_PEM_F_PEM_WRITE_PKCS8PRIVATEKEY,ERR_R_BUF_LIB);
829 ret = PEM_write_bio_PKCS8PrivateKey(bp, x, enc, kstr, klen, cb, u);