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 "cryptlib.h"

    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>

    68 #ifndef OPENSSL_NO_DES

    69 #include <openssl/des.h>

    70 #endif

    71 

    72 const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;

    73 

    74 #define MIN_LENGTH	4

    75 

    76 static int load_iv(char **fromp,unsigned char *to, int num);

    77 static int check_pem(const char *nm, const char *name);

    78 

    79 EXPORT_C int PEM_def_callback(char *buf, int num, int w, void *key)

    80 	{

    81 #ifdef OPENSSL_NO_FP_API

    82 	/* We should not ever call the default callback routine from

    83 	 * windows. */

    84 	PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);

    85 	return(-1);

    86 #else

    87 	int i,j;

    88 	const char *prompt;

    89 	if(key) {

    90 		i=strlen(key);

    91 		i=(i > num)?num:i;

    92 		memcpy(buf,key,i);

    93 		return(i);

    94 	}

    95 

    96 	prompt=EVP_get_pw_prompt();

    97 	if (prompt == NULL)

    98 		prompt="Enter PEM pass phrase:";

    99 

   100 	for (;;)

   101 		{

   102 		i=EVP_read_pw_string(buf,num,prompt,w);

   103 		if (i != 0)

   104 			{

   105 			PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);

   106 			memset(buf,0,(unsigned int)num);

   107 			return(-1);

   108 			}

   109 		j=strlen(buf);

   110 		if (j < MIN_LENGTH)

   111 			{

   112 			fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);

   113 			}

   114 		else

   115 			break;

   116 		}

   117 	return(j);

   118 #endif

   119 	}

   120 

   121 EXPORT_C void PEM_proc_type(char *buf, int type)

   122 	{

   123 	const char *str;

   124 

   125 	if (type == PEM_TYPE_ENCRYPTED)

   126 		str="ENCRYPTED";

   127 	else if (type == PEM_TYPE_MIC_CLEAR)

   128 		str="MIC-CLEAR";

   129 	else if (type == PEM_TYPE_MIC_ONLY)

   130 		str="MIC-ONLY";

   131 	else

   132 		str="BAD-TYPE";

   133 		

   134 	BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);

   135 	BUF_strlcat(buf,str,PEM_BUFSIZE);

   136 	BUF_strlcat(buf,"\n",PEM_BUFSIZE);

   137 	}

   138 

   139 EXPORT_C void PEM_dek_info(char *buf, const char *type, int len, char *str)

   140 	{

   141 	static const unsigned char map[17]="0123456789ABCDEF";

   142 	long i;

   143 	int j;

   144 

   145 	BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);

   146 	BUF_strlcat(buf,type,PEM_BUFSIZE);

   147 	BUF_strlcat(buf,",",PEM_BUFSIZE);

   148 	j=strlen(buf);

   149 	if (j + (len * 2) + 1 > PEM_BUFSIZE)

   150         	return;

   151 	for (i=0; i<len; i++)

   152 		{

   153 		buf[j+i*2]  =map[(str[i]>>4)&0x0f];

   154 		buf[j+i*2+1]=map[(str[i]   )&0x0f];

   155 		}

   156 	buf[j+i*2]='\n';

   157 	buf[j+i*2+1]='\0';

   158 	}

   159 

   160 #ifndef OPENSSL_NO_FP_API

   161 EXPORT_C void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,

   162 		    pem_password_cb *cb, void *u)

   163 	{

   164         BIO *b;

   165         void *ret;

   166 

   167         if ((b=BIO_new(BIO_s_file())) == NULL)

   168 		{

   169 		PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);

   170                 return(0);

   171 		}

   172         BIO_set_fp(b,fp,BIO_NOCLOSE);

   173         ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);

   174         BIO_free(b);

   175         return(ret);

   176 	}

   177 #endif

   178 

   179 static int check_pem(const char *nm, const char *name)

   180 {

   181 	/* Normal matching nm and name */

   182 	if (!strcmp(nm,name)) return 1;

   183 

   184 	/* Make PEM_STRING_EVP_PKEY match any private key */

   185 

   186 	if(!strcmp(nm,PEM_STRING_PKCS8) &&

   187 		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;

   188 

   189 	if(!strcmp(nm,PEM_STRING_PKCS8INF) &&

   190 		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;

   191 

   192 	if(!strcmp(nm,PEM_STRING_RSA) &&

   193 		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;

   194 

   195 	if(!strcmp(nm,PEM_STRING_DSA) &&

   196 		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;

   197 

   198  	if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) &&

   199  		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;

   200 	/* Permit older strings */

   201 

   202 	if(!strcmp(nm,PEM_STRING_X509_OLD) &&

   203 		!strcmp(name,PEM_STRING_X509)) return 1;

   204 

   205 	if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&

   206 		!strcmp(name,PEM_STRING_X509_REQ)) return 1;

   207 

   208 	/* Allow normal certs to be read as trusted certs */

   209 	if(!strcmp(nm,PEM_STRING_X509) &&

   210 		!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;

   211 

   212 	if(!strcmp(nm,PEM_STRING_X509_OLD) &&

   213 		!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;

   214 

   215 	/* Some CAs use PKCS#7 with CERTIFICATE headers */

   216 	if(!strcmp(nm, PEM_STRING_X509) &&

   217 		!strcmp(name, PEM_STRING_PKCS7)) return 1;

   218 

   219 	return 0;

   220 }

   221 

   222 EXPORT_C int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,

   223 	     pem_password_cb *cb, void *u)

   224 	{

   225 	EVP_CIPHER_INFO cipher;

   226 	char *nm=NULL,*header=NULL;

   227 	unsigned char *data=NULL;

   228 	long len;

   229 	int ret = 0;

   230 

   231 	for (;;)

   232 		{

   233 		if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {

   234 			if(ERR_GET_REASON(ERR_peek_error()) ==

   235 				PEM_R_NO_START_LINE)

   236 				ERR_add_error_data(2, "Expecting: ", name);

   237 			return 0;

   238 		}

   239 		if(check_pem(nm, name)) break;

   240 		OPENSSL_free(nm);

   241 		OPENSSL_free(header);

   242 		OPENSSL_free(data);

   243 		}

   244 	if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;

   245 	if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;

   246 

   247 	*pdata = data;

   248 	*plen = len;

   249 

   250 	if (pnm)

   251 		*pnm = nm;

   252 

   253 	ret = 1;

   254 

   255 err:

   256 	if (!ret || !pnm) OPENSSL_free(nm);

   257 	OPENSSL_free(header);

   258 	if (!ret) OPENSSL_free(data);

   259 	return ret;

   260 	}

   261 

   262 #ifndef OPENSSL_NO_FP_API

   263 EXPORT_C int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,

   264 		   char *x, const EVP_CIPHER *enc, unsigned char *kstr,

   265 		   int klen, pem_password_cb *callback, void *u)

   266         {

   267         BIO *b;

   268         int ret;

   269 

   270         if ((b=BIO_new(BIO_s_file())) == NULL)

   271 		{

   272 		PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);

   273                 return(0);

   274 		}

   275         BIO_set_fp(b,fp,BIO_NOCLOSE);

   276         ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);

   277         BIO_free(b);

   278         return(ret);

   279         }

   280 #endif

   281 

   282 EXPORT_C int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,

   283 		       char *x, const EVP_CIPHER *enc, unsigned char *kstr,

   284 		       int klen, pem_password_cb *callback, void *u)

   285 	{

   286 	EVP_CIPHER_CTX ctx;

   287 	int dsize=0,i,j,ret=0;

   288 	unsigned char *p,*data=NULL;

   289 	const char *objstr=NULL;

   290 	char buf[PEM_BUFSIZE];

   291 	unsigned char key[EVP_MAX_KEY_LENGTH];

   292 	unsigned char iv[EVP_MAX_IV_LENGTH];

   293 	

   294 	if (enc != NULL)

   295 		{

   296 		objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));

   297 		if (objstr == NULL)

   298 			{

   299 			PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);

   300 			goto err;

   301 			}

   302 		}

   303 

   304 	if ((dsize=i2d(x,NULL)) < 0)

   305 		{

   306 		PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);

   307 		dsize=0;

   308 		goto err;

   309 		}

   310 	/* dzise + 8 bytes are needed */

   311 	/* actually it needs the cipher block size extra... */

   312 	data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);

   313 	if (data == NULL)

   314 		{

   315 		PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);

   316 		goto err;

   317 		}

   318 	p=data;

   319 	i=i2d(x,&p);

   320 

   321 	if (enc != NULL)

   322 		{

   323 		if (kstr == NULL)

   324 			{

   325 			if (callback == NULL)

   326 				klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);

   327 			else

   328 				klen=(*callback)(buf,PEM_BUFSIZE,1,u);

   329 			if (klen <= 0)

   330 				{

   331 				PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);

   332 				goto err;

   333 				}

   334 #ifdef CHARSET_EBCDIC

   335 			/* Convert the pass phrase from EBCDIC */

   336 			ebcdic2ascii(buf, buf, klen);

   337 #endif

   338 			kstr=(unsigned char *)buf;

   339 			}

   340 		RAND_add(data,i,0);/* put in the RSA key. */

   341 		OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));

   342 		if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */

   343 			goto err;

   344 		/* The 'iv' is used as the iv and as a salt.  It is

   345 		 * NOT taken from the BytesToKey function */

   346 		EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);

   347 

   348 		if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);

   349 

   350 		OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);

   351 

   352 		buf[0]='\0';

   353 		PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);

   354 		PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);

   355 		/* k=strlen(buf); */

   356 

   357 		EVP_CIPHER_CTX_init(&ctx);

   358 		EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);

   359 		EVP_EncryptUpdate(&ctx,data,&j,data,i);

   360 		EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);

   361 		EVP_CIPHER_CTX_cleanup(&ctx);

   362 		i+=j;

   363 		ret=1;

   364 		}

   365 	else

   366 		{

   367 		ret=1;

   368 		buf[0]='\0';

   369 		}

   370 	i=PEM_write_bio(bp,name,buf,data,i);

   371 	if (i <= 0) ret=0;

   372 err:

   373 	OPENSSL_cleanse(key,sizeof(key));

   374 	OPENSSL_cleanse(iv,sizeof(iv));

   375 	OPENSSL_cleanse((char *)&ctx,sizeof(ctx));

   376 	OPENSSL_cleanse(buf,PEM_BUFSIZE);

   377 	if (data != NULL)

   378 		{

   379 		OPENSSL_cleanse(data,(unsigned int)dsize);

   380 		OPENSSL_free(data);

   381 		}

   382 	return(ret);

   383 	}

   384 

   385 EXPORT_C int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,

   386 	     pem_password_cb *callback,void *u)

   387 	{

   388 	int i,j,o,klen;

   389 	long len;

   390 	EVP_CIPHER_CTX ctx;

   391 	unsigned char key[EVP_MAX_KEY_LENGTH];

   392 	char buf[PEM_BUFSIZE];

   393 

   394 	len= *plen;

   395 

   396 	if (cipher->cipher == NULL) return(1);

   397 	if (callback == NULL)

   398 		klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);

   399 	else

   400 		klen=callback(buf,PEM_BUFSIZE,0,u);

   401 	if (klen <= 0)

   402 		{

   403 		PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);

   404 		return(0);

   405 		}

   406 #ifdef CHARSET_EBCDIC

   407 	/* Convert the pass phrase from EBCDIC */

   408 	ebcdic2ascii(buf, buf, klen);

   409 #endif

   410 

   411 	EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),

   412 		(unsigned char *)buf,klen,1,key,NULL);

   413 

   414 	j=(int)len;

   415 	EVP_CIPHER_CTX_init(&ctx);

   416 	EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));

   417 	EVP_DecryptUpdate(&ctx,data,&i,data,j);

   418 	o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);

   419 	EVP_CIPHER_CTX_cleanup(&ctx);

   420 	OPENSSL_cleanse((char *)buf,sizeof(buf));

   421 	OPENSSL_cleanse((char *)key,sizeof(key));

   422 	j+=i;

   423 	if (!o)

   424 		{

   425 		PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);

   426 		return(0);

   427 		}

   428 	*plen=j;

   429 	return(1);

   430 	}

   431 

   432 EXPORT_C int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)

   433 	{

   434 	int o;

   435 	const EVP_CIPHER *enc=NULL;

   436 	char *p,c;

   437 	char **header_pp = &header;

   438 

   439 	cipher->cipher=NULL;

   440 	if ((header == NULL) || (*header == '\0') || (*header == '\n'))

   441 		return(1);

   442 	if (strncmp(header,"Proc-Type: ",11) != 0)

   443 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }

   444 	header+=11;

   445 	if (*header != '4') return(0); header++;

   446 	if (*header != ',') return(0); header++;

   447 	if (strncmp(header,"ENCRYPTED",9) != 0)

   448 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }

   449 	for (; (*header != '\n') && (*header != '\0'); header++)

   450 		;

   451 	if (*header == '\0')

   452 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }

   453 	header++;

   454 	if (strncmp(header,"DEK-Info: ",10) != 0)

   455 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }

   456 	header+=10;

   457 

   458 	p=header;

   459 	for (;;)

   460 		{

   461 		c= *header;

   462 #ifndef CHARSET_EBCDIC

   463 		if (!(	((c >= 'A') && (c <= 'Z')) || (c == '-') ||

   464 			((c >= '0') && (c <= '9'))))

   465 			break;

   466 #else

   467 		if (!(	isupper(c) || (c == '-') ||

   468 			isdigit(c)))

   469 			break;

   470 #endif

   471 		header++;

   472 		}

   473 	*header='\0';

   474 	o=OBJ_sn2nid(p);

   475 	cipher->cipher=enc=EVP_get_cipherbyname(p);

   476 	*header=c;

   477 	header++;

   478 

   479 	if (enc == NULL)

   480 		{

   481 		PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);

   482 		return(0);

   483 		}

   484 	if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))

   485 		return(0);

   486 

   487 	return(1);

   488 	}

   489 

   490 static int load_iv(char **fromp, unsigned char *to, int num)

   491 	{

   492 	int v,i;

   493 	char *from;

   494 

   495 	from= *fromp;

   496 	for (i=0; i<num; i++) to[i]=0;

   497 	num*=2;

   498 	for (i=0; i<num; i++)

   499 		{

   500 		if ((*from >= '0') && (*from <= '9'))

   501 			v= *from-'0';

   502 		else if ((*from >= 'A') && (*from <= 'F'))

   503 			v= *from-'A'+10;

   504 		else if ((*from >= 'a') && (*from <= 'f'))

   505 			v= *from-'a'+10;

   506 		else

   507 			{

   508 			PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);

   509 			return(0);

   510 			}

   511 		from++;

   512 		to[i/2]|=v<<(long)((!(i&1))*4);

   513 		}

   514 

   515 	*fromp=from;

   516 	return(1);

   517 	}

   518 

   519 #ifndef OPENSSL_NO_FP_API

   520 EXPORT_C int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,

   521 	     long len)

   522         {

   523         BIO *b;

   524         int ret;

   525 

   526         if ((b=BIO_new(BIO_s_file())) == NULL)

   527 		{

   528 		PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);

   529                 return(0);

   530 		}

   531         BIO_set_fp(b,fp,BIO_NOCLOSE);

   532         ret=PEM_write_bio(b, name, header, data,len);

   533         BIO_free(b);

   534         return(ret);

   535         }

   536 #endif

   537 

   538 EXPORT_C int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,

   539 	     long len)

   540 	{

   541 	int nlen,n,i,j,outl;

   542 	unsigned char *buf = NULL;

   543 	EVP_ENCODE_CTX ctx;

   544 	int reason=ERR_R_BUF_LIB;

   545 	

   546 	EVP_EncodeInit(&ctx);

   547 	nlen=strlen(name);

   548 

   549 	if (	(BIO_write(bp,"-----BEGIN ",11) != 11) ||

   550 		(BIO_write(bp,name,nlen) != nlen) ||

   551 		(BIO_write(bp,"-----\n",6) != 6))

   552 		goto err;

   553 		

   554 	i=strlen(header);

   555 	if (i > 0)

   556 		{

   557 		if (	(BIO_write(bp,header,i) != i) ||

   558 			(BIO_write(bp,"\n",1) != 1))

   559 			goto err;

   560 		}

   561 

   562 	buf = OPENSSL_malloc(PEM_BUFSIZE*8);

   563 	if (buf == NULL)

   564 		{

   565 		reason=ERR_R_MALLOC_FAILURE;

   566 		goto err;

   567 		}

   568 

   569 	i=j=0;

   570 	while (len > 0)

   571 		{

   572 		n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);

   573 		EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);

   574 		if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))

   575 			goto err;

   576 		i+=outl;

   577 		len-=n;

   578 		j+=n;

   579 		}

   580 	EVP_EncodeFinal(&ctx,buf,&outl);

   581 	if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;

   582 	OPENSSL_cleanse(buf, PEM_BUFSIZE*8);

   583 	OPENSSL_free(buf);

   584 	buf = NULL;

   585 	if (	(BIO_write(bp,"-----END ",9) != 9) ||

   586 		(BIO_write(bp,name,nlen) != nlen) ||

   587 		(BIO_write(bp,"-----\n",6) != 6))

   588 		goto err;

   589 	return(i+outl);

   590 err:

   591 	if (buf) {

   592 		OPENSSL_cleanse(buf, PEM_BUFSIZE*8);

   593 		OPENSSL_free(buf);

   594 	}

   595 	PEMerr(PEM_F_PEM_WRITE_BIO,reason);

   596 	return(0);

   597 	}

   598 

   599 #ifndef OPENSSL_NO_FP_API

   600 EXPORT_C int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,

   601 	     long *len)

   602         {

   603         BIO *b;

   604         int ret;

   605 

   606         if ((b=BIO_new(BIO_s_file())) == NULL)

   607 		{

   608 		PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);

   609                 return(0);

   610 		}

   611         BIO_set_fp(b,fp,BIO_NOCLOSE);

   612         ret=PEM_read_bio(b, name, header, data,len);

   613         BIO_free(b);

   614         return(ret);

   615         }

   616 #endif

   617 

   618 EXPORT_C int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,

   619 	     long *len)

   620 	{

   621 	EVP_ENCODE_CTX ctx;

   622 	int end=0,i,k,bl=0,hl=0,nohead=0;

   623 	char buf[256];

   624 	BUF_MEM *nameB;

   625 	BUF_MEM *headerB;

   626 	BUF_MEM *dataB,*tmpB;

   627 	

   628 	nameB=BUF_MEM_new();

   629 	headerB=BUF_MEM_new();

   630 	dataB=BUF_MEM_new();

   631 	if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))

   632 		{

   633 		BUF_MEM_free(nameB);

   634 		BUF_MEM_free(headerB);

   635 		BUF_MEM_free(dataB);

   636 		PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);

   637 		return(0);

   638 		}

   639 

   640 	buf[254]='\0';

   641 	for (;;)

   642 		{

   643 		i=BIO_gets(bp,buf,254);

   644 

   645 		if (i <= 0)

   646 			{

   647 			PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);

   648 			goto err;

   649 			}

   650 

   651 		while ((i >= 0) && (buf[i] <= ' ')) i--;

   652 		buf[++i]='\n'; buf[++i]='\0';

   653 

   654 		if (strncmp(buf,"-----BEGIN ",11) == 0)

   655 			{

   656 			i=strlen(&(buf[11]));

   657 

   658 			if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)

   659 				continue;

   660 			if (!BUF_MEM_grow(nameB,i+9))

   661 				{

   662 				PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);

   663 				goto err;

   664 				}

   665 			memcpy(nameB->data,&(buf[11]),i-6);

   666 			nameB->data[i-6]='\0';

   667 			break;

   668 			}

   669 		}

   670 	hl=0;

   671 	if (!BUF_MEM_grow(headerB,256))

   672 		{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }

   673 	headerB->data[0]='\0';

   674 	for (;;)

   675 		{

   676 		i=BIO_gets(bp,buf,254);

   677 		if (i <= 0) break;

   678 

   679 		while ((i >= 0) && (buf[i] <= ' ')) i--;

   680 		buf[++i]='\n'; buf[++i]='\0';

   681 

   682 		if (buf[0] == '\n') break;

   683 		if (!BUF_MEM_grow(headerB,hl+i+9))

   684 			{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }

   685 		if (strncmp(buf,"-----END ",9) == 0)

   686 			{

   687 			nohead=1;

   688 			break;

   689 			}

   690 		memcpy(&(headerB->data[hl]),buf,i);

   691 		headerB->data[hl+i]='\0';

   692 		hl+=i;

   693 		}

   694 

   695 	bl=0;

   696 	if (!BUF_MEM_grow(dataB,1024))

   697 		{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }

   698 	dataB->data[0]='\0';

   699 	if (!nohead)

   700 		{

   701 		for (;;)

   702 			{

   703 			i=BIO_gets(bp,buf,254);

   704 			if (i <= 0) break;

   705 

   706 			while ((i >= 0) && (buf[i] <= ' ')) i--;

   707 			buf[++i]='\n'; buf[++i]='\0';

   708 

   709 			if (i != 65) end=1;

   710 			if (strncmp(buf,"-----END ",9) == 0)

   711 				break;

   712 			if (i > 65) break;

   713 			if (!BUF_MEM_grow_clean(dataB,i+bl+9))

   714 				{

   715 				PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);

   716 				goto err;

   717 				}

   718 			memcpy(&(dataB->data[bl]),buf,i);

   719 			dataB->data[bl+i]='\0';

   720 			bl+=i;

   721 			if (end)

   722 				{

   723 				buf[0]='\0';

   724 				i=BIO_gets(bp,buf,254);

   725 				if (i <= 0) break;

   726 

   727 				while ((i >= 0) && (buf[i] <= ' ')) i--;

   728 				buf[++i]='\n'; buf[++i]='\0';

   729 

   730 				break;

   731 				}

   732 			}

   733 		}

   734 	else

   735 		{

   736 		tmpB=headerB;

   737 		headerB=dataB;

   738 		dataB=tmpB;

   739 		bl=hl;

   740 		}

   741 	i=strlen(nameB->data);

   742 	if (	(strncmp(buf,"-----END ",9) != 0) ||

   743 		(strncmp(nameB->data,&(buf[9]),i) != 0) ||

   744 		(strncmp(&(buf[9+i]),"-----\n",6) != 0))

   745 		{

   746 		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);

   747 		goto err;

   748 		}

   749 

   750 	EVP_DecodeInit(&ctx);

   751 	i=EVP_DecodeUpdate(&ctx,

   752 		(unsigned char *)dataB->data,&bl,

   753 		(unsigned char *)dataB->data,bl);

   754 	if (i < 0)

   755 		{

   756 		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);

   757 		goto err;

   758 		}

   759 	i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);

   760 	if (i < 0)

   761 		{

   762 		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);

   763 		goto err;

   764 		}

   765 	bl+=k;

   766 

   767 	if (bl == 0) goto err;

   768 	*name=nameB->data;

   769 	*header=headerB->data;

   770 	*data=(unsigned char *)dataB->data;

   771 	*len=bl;

   772 	OPENSSL_free(nameB);

   773 	OPENSSL_free(headerB);

   774 	OPENSSL_free(dataB);

   775 	return(1);

   776 err:

   777 	BUF_MEM_free(nameB);

   778 	BUF_MEM_free(headerB);

   779 	BUF_MEM_free(dataB);

   780 	return(0);

   781 	}