sl@0: /* crypto/pem/pem_lib.c */
sl@0: /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * This package is an SSL implementation written
sl@0:  * by Eric Young (eay@cryptsoft.com).
sl@0:  * The implementation was written so as to conform with Netscapes SSL.
sl@0:  * 
sl@0:  * This library is free for commercial and non-commercial use as long as
sl@0:  * the following conditions are aheared to.  The following conditions
sl@0:  * apply to all code found in this distribution, be it the RC4, RSA,
sl@0:  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
sl@0:  * included with this distribution is covered by the same copyright terms
sl@0:  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
sl@0:  * 
sl@0:  * Copyright remains Eric Young's, and as such any Copyright notices in
sl@0:  * the code are not to be removed.
sl@0:  * If this package is used in a product, Eric Young should be given attribution
sl@0:  * as the author of the parts of the library used.
sl@0:  * This can be in the form of a textual message at program startup or
sl@0:  * in documentation (online or textual) provided with the package.
sl@0:  * 
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 3. All advertising materials mentioning features or use of this software
sl@0:  *    must display the following acknowledgement:
sl@0:  *    "This product includes cryptographic software written by
sl@0:  *     Eric Young (eay@cryptsoft.com)"
sl@0:  *    The word 'cryptographic' can be left out if the rouines from the library
sl@0:  *    being used are not cryptographic related :-).
sl@0:  * 4. If you include any Windows specific code (or a derivative thereof) from 
sl@0:  *    the apps directory (application code) you must include an acknowledgement:
sl@0:  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
sl@0:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
sl@0:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
sl@0:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
sl@0:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
sl@0:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
sl@0:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
sl@0:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
sl@0:  * SUCH DAMAGE.
sl@0:  * 
sl@0:  * The licence and distribution terms for any publically available version or
sl@0:  * derivative of this code cannot be changed.  i.e. this code cannot simply be
sl@0:  * copied and put under another distribution licence
sl@0:  * [including the GNU Public Licence.]
sl@0:  */
sl@0: 
sl@0: #include <stdio.h>
sl@0: #include "cryptlib.h"
sl@0: #include <openssl/buffer.h>
sl@0: #include <openssl/objects.h>
sl@0: #include <openssl/evp.h>
sl@0: #include <openssl/rand.h>
sl@0: #include <openssl/x509.h>
sl@0: #include <openssl/pem.h>
sl@0: #include <openssl/pkcs12.h>
sl@0: #ifndef OPENSSL_NO_DES
sl@0: #include <openssl/des.h>
sl@0: #endif
sl@0: 
sl@0: const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
sl@0: 
sl@0: #define MIN_LENGTH	4
sl@0: 
sl@0: static int load_iv(char **fromp,unsigned char *to, int num);
sl@0: static int check_pem(const char *nm, const char *name);
sl@0: 
sl@0: EXPORT_C int PEM_def_callback(char *buf, int num, int w, void *key)
sl@0: 	{
sl@0: #ifdef OPENSSL_NO_FP_API
sl@0: 	/* We should not ever call the default callback routine from
sl@0: 	 * windows. */
sl@0: 	PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
sl@0: 	return(-1);
sl@0: #else
sl@0: 	int i,j;
sl@0: 	const char *prompt;
sl@0: 	if(key) {
sl@0: 		i=strlen(key);
sl@0: 		i=(i > num)?num:i;
sl@0: 		memcpy(buf,key,i);
sl@0: 		return(i);
sl@0: 	}
sl@0: 
sl@0: 	prompt=EVP_get_pw_prompt();
sl@0: 	if (prompt == NULL)
sl@0: 		prompt="Enter PEM pass phrase:";
sl@0: 
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		i=EVP_read_pw_string(buf,num,prompt,w);
sl@0: 		if (i != 0)
sl@0: 			{
sl@0: 			PEMerr(PEM_F_PEM_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
sl@0: 			memset(buf,0,(unsigned int)num);
sl@0: 			return(-1);
sl@0: 			}
sl@0: 		j=strlen(buf);
sl@0: 		if (j < MIN_LENGTH)
sl@0: 			{
sl@0: 			fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
sl@0: 			}
sl@0: 		else
sl@0: 			break;
sl@0: 		}
sl@0: 	return(j);
sl@0: #endif
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void PEM_proc_type(char *buf, int type)
sl@0: 	{
sl@0: 	const char *str;
sl@0: 
sl@0: 	if (type == PEM_TYPE_ENCRYPTED)
sl@0: 		str="ENCRYPTED";
sl@0: 	else if (type == PEM_TYPE_MIC_CLEAR)
sl@0: 		str="MIC-CLEAR";
sl@0: 	else if (type == PEM_TYPE_MIC_ONLY)
sl@0: 		str="MIC-ONLY";
sl@0: 	else
sl@0: 		str="BAD-TYPE";
sl@0: 		
sl@0: 	BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
sl@0: 	BUF_strlcat(buf,str,PEM_BUFSIZE);
sl@0: 	BUF_strlcat(buf,"\n",PEM_BUFSIZE);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C void PEM_dek_info(char *buf, const char *type, int len, char *str)
sl@0: 	{
sl@0: 	static const unsigned char map[17]="0123456789ABCDEF";
sl@0: 	long i;
sl@0: 	int j;
sl@0: 
sl@0: 	BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
sl@0: 	BUF_strlcat(buf,type,PEM_BUFSIZE);
sl@0: 	BUF_strlcat(buf,",",PEM_BUFSIZE);
sl@0: 	j=strlen(buf);
sl@0: 	if (j + (len * 2) + 1 > PEM_BUFSIZE)
sl@0:         	return;
sl@0: 	for (i=0; i<len; i++)
sl@0: 		{
sl@0: 		buf[j+i*2]  =map[(str[i]>>4)&0x0f];
sl@0: 		buf[j+i*2+1]=map[(str[i]   )&0x0f];
sl@0: 		}
sl@0: 	buf[j+i*2]='\n';
sl@0: 	buf[j+i*2+1]='\0';
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_FP_API
sl@0: EXPORT_C void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
sl@0: 		    pem_password_cb *cb, void *u)
sl@0: 	{
sl@0:         BIO *b;
sl@0:         void *ret;
sl@0: 
sl@0:         if ((b=BIO_new(BIO_s_file())) == NULL)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
sl@0:                 return(0);
sl@0: 		}
sl@0:         BIO_set_fp(b,fp,BIO_NOCLOSE);
sl@0:         ret=PEM_ASN1_read_bio(d2i,name,b,x,cb,u);
sl@0:         BIO_free(b);
sl@0:         return(ret);
sl@0: 	}
sl@0: #endif
sl@0: 
sl@0: static int check_pem(const char *nm, const char *name)
sl@0: {
sl@0: 	/* Normal matching nm and name */
sl@0: 	if (!strcmp(nm,name)) return 1;
sl@0: 
sl@0: 	/* Make PEM_STRING_EVP_PKEY match any private key */
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_PKCS8) &&
sl@0: 		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_PKCS8INF) &&
sl@0: 		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_RSA) &&
sl@0: 		!strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_DSA) &&
sl@0: 		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
sl@0: 
sl@0:  	if(!strcmp(nm,PEM_STRING_ECPRIVATEKEY) &&
sl@0:  		 !strcmp(name,PEM_STRING_EVP_PKEY)) return 1;
sl@0: 	/* Permit older strings */
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_X509_OLD) &&
sl@0: 		!strcmp(name,PEM_STRING_X509)) return 1;
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
sl@0: 		!strcmp(name,PEM_STRING_X509_REQ)) return 1;
sl@0: 
sl@0: 	/* Allow normal certs to be read as trusted certs */
sl@0: 	if(!strcmp(nm,PEM_STRING_X509) &&
sl@0: 		!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
sl@0: 
sl@0: 	if(!strcmp(nm,PEM_STRING_X509_OLD) &&
sl@0: 		!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
sl@0: 
sl@0: 	/* Some CAs use PKCS#7 with CERTIFICATE headers */
sl@0: 	if(!strcmp(nm, PEM_STRING_X509) &&
sl@0: 		!strcmp(name, PEM_STRING_PKCS7)) return 1;
sl@0: 
sl@0: 	return 0;
sl@0: }
sl@0: 
sl@0: EXPORT_C int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
sl@0: 	     pem_password_cb *cb, void *u)
sl@0: 	{
sl@0: 	EVP_CIPHER_INFO cipher;
sl@0: 	char *nm=NULL,*header=NULL;
sl@0: 	unsigned char *data=NULL;
sl@0: 	long len;
sl@0: 	int ret = 0;
sl@0: 
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
sl@0: 			if(ERR_GET_REASON(ERR_peek_error()) ==
sl@0: 				PEM_R_NO_START_LINE)
sl@0: 				ERR_add_error_data(2, "Expecting: ", name);
sl@0: 			return 0;
sl@0: 		}
sl@0: 		if(check_pem(nm, name)) break;
sl@0: 		OPENSSL_free(nm);
sl@0: 		OPENSSL_free(header);
sl@0: 		OPENSSL_free(data);
sl@0: 		}
sl@0: 	if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
sl@0: 	if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
sl@0: 
sl@0: 	*pdata = data;
sl@0: 	*plen = len;
sl@0: 
sl@0: 	if (pnm)
sl@0: 		*pnm = nm;
sl@0: 
sl@0: 	ret = 1;
sl@0: 
sl@0: err:
sl@0: 	if (!ret || !pnm) OPENSSL_free(nm);
sl@0: 	OPENSSL_free(header);
sl@0: 	if (!ret) OPENSSL_free(data);
sl@0: 	return ret;
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_FP_API
sl@0: EXPORT_C int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
sl@0: 		   char *x, const EVP_CIPHER *enc, unsigned char *kstr,
sl@0: 		   int klen, pem_password_cb *callback, void *u)
sl@0:         {
sl@0:         BIO *b;
sl@0:         int ret;
sl@0: 
sl@0:         if ((b=BIO_new(BIO_s_file())) == NULL)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
sl@0:                 return(0);
sl@0: 		}
sl@0:         BIO_set_fp(b,fp,BIO_NOCLOSE);
sl@0:         ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback,u);
sl@0:         BIO_free(b);
sl@0:         return(ret);
sl@0:         }
sl@0: #endif
sl@0: 
sl@0: EXPORT_C int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
sl@0: 		       char *x, const EVP_CIPHER *enc, unsigned char *kstr,
sl@0: 		       int klen, pem_password_cb *callback, void *u)
sl@0: 	{
sl@0: 	EVP_CIPHER_CTX ctx;
sl@0: 	int dsize=0,i,j,ret=0;
sl@0: 	unsigned char *p,*data=NULL;
sl@0: 	const char *objstr=NULL;
sl@0: 	char buf[PEM_BUFSIZE];
sl@0: 	unsigned char key[EVP_MAX_KEY_LENGTH];
sl@0: 	unsigned char iv[EVP_MAX_IV_LENGTH];
sl@0: 	
sl@0: 	if (enc != NULL)
sl@0: 		{
sl@0: 		objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
sl@0: 		if (objstr == NULL)
sl@0: 			{
sl@0: 			PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
sl@0: 			goto err;
sl@0: 			}
sl@0: 		}
sl@0: 
sl@0: 	if ((dsize=i2d(x,NULL)) < 0)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_ASN1_LIB);
sl@0: 		dsize=0;
sl@0: 		goto err;
sl@0: 		}
sl@0: 	/* dzise + 8 bytes are needed */
sl@0: 	/* actually it needs the cipher block size extra... */
sl@0: 	data=(unsigned char *)OPENSSL_malloc((unsigned int)dsize+20);
sl@0: 	if (data == NULL)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
sl@0: 		goto err;
sl@0: 		}
sl@0: 	p=data;
sl@0: 	i=i2d(x,&p);
sl@0: 
sl@0: 	if (enc != NULL)
sl@0: 		{
sl@0: 		if (kstr == NULL)
sl@0: 			{
sl@0: 			if (callback == NULL)
sl@0: 				klen=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
sl@0: 			else
sl@0: 				klen=(*callback)(buf,PEM_BUFSIZE,1,u);
sl@0: 			if (klen <= 0)
sl@0: 				{
sl@0: 				PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
sl@0: 				goto err;
sl@0: 				}
sl@0: #ifdef CHARSET_EBCDIC
sl@0: 			/* Convert the pass phrase from EBCDIC */
sl@0: 			ebcdic2ascii(buf, buf, klen);
sl@0: #endif
sl@0: 			kstr=(unsigned char *)buf;
sl@0: 			}
sl@0: 		RAND_add(data,i,0);/* put in the RSA key. */
sl@0: 		OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
sl@0: 		if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
sl@0: 			goto err;
sl@0: 		/* The 'iv' is used as the iv and as a salt.  It is
sl@0: 		 * NOT taken from the BytesToKey function */
sl@0: 		EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
sl@0: 
sl@0: 		if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
sl@0: 
sl@0: 		OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
sl@0: 
sl@0: 		buf[0]='\0';
sl@0: 		PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
sl@0: 		PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
sl@0: 		/* k=strlen(buf); */
sl@0: 
sl@0: 		EVP_CIPHER_CTX_init(&ctx);
sl@0: 		EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv);
sl@0: 		EVP_EncryptUpdate(&ctx,data,&j,data,i);
sl@0: 		EVP_EncryptFinal_ex(&ctx,&(data[j]),&i);
sl@0: 		EVP_CIPHER_CTX_cleanup(&ctx);
sl@0: 		i+=j;
sl@0: 		ret=1;
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		ret=1;
sl@0: 		buf[0]='\0';
sl@0: 		}
sl@0: 	i=PEM_write_bio(bp,name,buf,data,i);
sl@0: 	if (i <= 0) ret=0;
sl@0: err:
sl@0: 	OPENSSL_cleanse(key,sizeof(key));
sl@0: 	OPENSSL_cleanse(iv,sizeof(iv));
sl@0: 	OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
sl@0: 	OPENSSL_cleanse(buf,PEM_BUFSIZE);
sl@0: 	if (data != NULL)
sl@0: 		{
sl@0: 		OPENSSL_cleanse(data,(unsigned int)dsize);
sl@0: 		OPENSSL_free(data);
sl@0: 		}
sl@0: 	return(ret);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
sl@0: 	     pem_password_cb *callback,void *u)
sl@0: 	{
sl@0: 	int i,j,o,klen;
sl@0: 	long len;
sl@0: 	EVP_CIPHER_CTX ctx;
sl@0: 	unsigned char key[EVP_MAX_KEY_LENGTH];
sl@0: 	char buf[PEM_BUFSIZE];
sl@0: 
sl@0: 	len= *plen;
sl@0: 
sl@0: 	if (cipher->cipher == NULL) return(1);
sl@0: 	if (callback == NULL)
sl@0: 		klen=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
sl@0: 	else
sl@0: 		klen=callback(buf,PEM_BUFSIZE,0,u);
sl@0: 	if (klen <= 0)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
sl@0: 		return(0);
sl@0: 		}
sl@0: #ifdef CHARSET_EBCDIC
sl@0: 	/* Convert the pass phrase from EBCDIC */
sl@0: 	ebcdic2ascii(buf, buf, klen);
sl@0: #endif
sl@0: 
sl@0: 	EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
sl@0: 		(unsigned char *)buf,klen,1,key,NULL);
sl@0: 
sl@0: 	j=(int)len;
sl@0: 	EVP_CIPHER_CTX_init(&ctx);
sl@0: 	EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
sl@0: 	EVP_DecryptUpdate(&ctx,data,&i,data,j);
sl@0: 	o=EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
sl@0: 	EVP_CIPHER_CTX_cleanup(&ctx);
sl@0: 	OPENSSL_cleanse((char *)buf,sizeof(buf));
sl@0: 	OPENSSL_cleanse((char *)key,sizeof(key));
sl@0: 	j+=i;
sl@0: 	if (!o)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
sl@0: 		return(0);
sl@0: 		}
sl@0: 	*plen=j;
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: EXPORT_C int PEM_get_EVP_CIPHER_INFO(char *header, EVP_CIPHER_INFO *cipher)
sl@0: 	{
sl@0: 	int o;
sl@0: 	const EVP_CIPHER *enc=NULL;
sl@0: 	char *p,c;
sl@0: 	char **header_pp = &header;
sl@0: 
sl@0: 	cipher->cipher=NULL;
sl@0: 	if ((header == NULL) || (*header == '\0') || (*header == '\n'))
sl@0: 		return(1);
sl@0: 	if (strncmp(header,"Proc-Type: ",11) != 0)
sl@0: 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
sl@0: 	header+=11;
sl@0: 	if (*header != '4') return(0); header++;
sl@0: 	if (*header != ',') return(0); header++;
sl@0: 	if (strncmp(header,"ENCRYPTED",9) != 0)
sl@0: 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
sl@0: 	for (; (*header != '\n') && (*header != '\0'); header++)
sl@0: 		;
sl@0: 	if (*header == '\0')
sl@0: 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
sl@0: 	header++;
sl@0: 	if (strncmp(header,"DEK-Info: ",10) != 0)
sl@0: 		{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
sl@0: 	header+=10;
sl@0: 
sl@0: 	p=header;
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		c= *header;
sl@0: #ifndef CHARSET_EBCDIC
sl@0: 		if (!(	((c >= 'A') && (c <= 'Z')) || (c == '-') ||
sl@0: 			((c >= '0') && (c <= '9'))))
sl@0: 			break;
sl@0: #else
sl@0: 		if (!(	isupper(c) || (c == '-') ||
sl@0: 			isdigit(c)))
sl@0: 			break;
sl@0: #endif
sl@0: 		header++;
sl@0: 		}
sl@0: 	*header='\0';
sl@0: 	o=OBJ_sn2nid(p);
sl@0: 	cipher->cipher=enc=EVP_get_cipherbyname(p);
sl@0: 	*header=c;
sl@0: 	header++;
sl@0: 
sl@0: 	if (enc == NULL)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
sl@0: 		return(0);
sl@0: 		}
sl@0: 	if (!load_iv(header_pp,&(cipher->iv[0]),enc->iv_len))
sl@0: 		return(0);
sl@0: 
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: static int load_iv(char **fromp, unsigned char *to, int num)
sl@0: 	{
sl@0: 	int v,i;
sl@0: 	char *from;
sl@0: 
sl@0: 	from= *fromp;
sl@0: 	for (i=0; i<num; i++) to[i]=0;
sl@0: 	num*=2;
sl@0: 	for (i=0; i<num; i++)
sl@0: 		{
sl@0: 		if ((*from >= '0') && (*from <= '9'))
sl@0: 			v= *from-'0';
sl@0: 		else if ((*from >= 'A') && (*from <= 'F'))
sl@0: 			v= *from-'A'+10;
sl@0: 		else if ((*from >= 'a') && (*from <= 'f'))
sl@0: 			v= *from-'a'+10;
sl@0: 		else
sl@0: 			{
sl@0: 			PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
sl@0: 			return(0);
sl@0: 			}
sl@0: 		from++;
sl@0: 		to[i/2]|=v<<(long)((!(i&1))*4);
sl@0: 		}
sl@0: 
sl@0: 	*fromp=from;
sl@0: 	return(1);
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_FP_API
sl@0: EXPORT_C int PEM_write(FILE *fp, char *name, char *header, unsigned char *data,
sl@0: 	     long len)
sl@0:         {
sl@0:         BIO *b;
sl@0:         int ret;
sl@0: 
sl@0:         if ((b=BIO_new(BIO_s_file())) == NULL)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
sl@0:                 return(0);
sl@0: 		}
sl@0:         BIO_set_fp(b,fp,BIO_NOCLOSE);
sl@0:         ret=PEM_write_bio(b, name, header, data,len);
sl@0:         BIO_free(b);
sl@0:         return(ret);
sl@0:         }
sl@0: #endif
sl@0: 
sl@0: EXPORT_C int PEM_write_bio(BIO *bp, const char *name, char *header, unsigned char *data,
sl@0: 	     long len)
sl@0: 	{
sl@0: 	int nlen,n,i,j,outl;
sl@0: 	unsigned char *buf = NULL;
sl@0: 	EVP_ENCODE_CTX ctx;
sl@0: 	int reason=ERR_R_BUF_LIB;
sl@0: 	
sl@0: 	EVP_EncodeInit(&ctx);
sl@0: 	nlen=strlen(name);
sl@0: 
sl@0: 	if (	(BIO_write(bp,"-----BEGIN ",11) != 11) ||
sl@0: 		(BIO_write(bp,name,nlen) != nlen) ||
sl@0: 		(BIO_write(bp,"-----\n",6) != 6))
sl@0: 		goto err;
sl@0: 		
sl@0: 	i=strlen(header);
sl@0: 	if (i > 0)
sl@0: 		{
sl@0: 		if (	(BIO_write(bp,header,i) != i) ||
sl@0: 			(BIO_write(bp,"\n",1) != 1))
sl@0: 			goto err;
sl@0: 		}
sl@0: 
sl@0: 	buf = OPENSSL_malloc(PEM_BUFSIZE*8);
sl@0: 	if (buf == NULL)
sl@0: 		{
sl@0: 		reason=ERR_R_MALLOC_FAILURE;
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	i=j=0;
sl@0: 	while (len > 0)
sl@0: 		{
sl@0: 		n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
sl@0: 		EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
sl@0: 		if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
sl@0: 			goto err;
sl@0: 		i+=outl;
sl@0: 		len-=n;
sl@0: 		j+=n;
sl@0: 		}
sl@0: 	EVP_EncodeFinal(&ctx,buf,&outl);
sl@0: 	if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
sl@0: 	OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
sl@0: 	OPENSSL_free(buf);
sl@0: 	buf = NULL;
sl@0: 	if (	(BIO_write(bp,"-----END ",9) != 9) ||
sl@0: 		(BIO_write(bp,name,nlen) != nlen) ||
sl@0: 		(BIO_write(bp,"-----\n",6) != 6))
sl@0: 		goto err;
sl@0: 	return(i+outl);
sl@0: err:
sl@0: 	if (buf) {
sl@0: 		OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
sl@0: 		OPENSSL_free(buf);
sl@0: 	}
sl@0: 	PEMerr(PEM_F_PEM_WRITE_BIO,reason);
sl@0: 	return(0);
sl@0: 	}
sl@0: 
sl@0: #ifndef OPENSSL_NO_FP_API
sl@0: EXPORT_C int PEM_read(FILE *fp, char **name, char **header, unsigned char **data,
sl@0: 	     long *len)
sl@0:         {
sl@0:         BIO *b;
sl@0:         int ret;
sl@0: 
sl@0:         if ((b=BIO_new(BIO_s_file())) == NULL)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
sl@0:                 return(0);
sl@0: 		}
sl@0:         BIO_set_fp(b,fp,BIO_NOCLOSE);
sl@0:         ret=PEM_read_bio(b, name, header, data,len);
sl@0:         BIO_free(b);
sl@0:         return(ret);
sl@0:         }
sl@0: #endif
sl@0: 
sl@0: EXPORT_C int PEM_read_bio(BIO *bp, char **name, char **header, unsigned char **data,
sl@0: 	     long *len)
sl@0: 	{
sl@0: 	EVP_ENCODE_CTX ctx;
sl@0: 	int end=0,i,k,bl=0,hl=0,nohead=0;
sl@0: 	char buf[256];
sl@0: 	BUF_MEM *nameB;
sl@0: 	BUF_MEM *headerB;
sl@0: 	BUF_MEM *dataB,*tmpB;
sl@0: 	
sl@0: 	nameB=BUF_MEM_new();
sl@0: 	headerB=BUF_MEM_new();
sl@0: 	dataB=BUF_MEM_new();
sl@0: 	if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
sl@0: 		{
sl@0: 		BUF_MEM_free(nameB);
sl@0: 		BUF_MEM_free(headerB);
sl@0: 		BUF_MEM_free(dataB);
sl@0: 		PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
sl@0: 		return(0);
sl@0: 		}
sl@0: 
sl@0: 	buf[254]='\0';
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		i=BIO_gets(bp,buf,254);
sl@0: 
sl@0: 		if (i <= 0)
sl@0: 			{
sl@0: 			PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
sl@0: 			goto err;
sl@0: 			}
sl@0: 
sl@0: 		while ((i >= 0) && (buf[i] <= ' ')) i--;
sl@0: 		buf[++i]='\n'; buf[++i]='\0';
sl@0: 
sl@0: 		if (strncmp(buf,"-----BEGIN ",11) == 0)
sl@0: 			{
sl@0: 			i=strlen(&(buf[11]));
sl@0: 
sl@0: 			if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
sl@0: 				continue;
sl@0: 			if (!BUF_MEM_grow(nameB,i+9))
sl@0: 				{
sl@0: 				PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			memcpy(nameB->data,&(buf[11]),i-6);
sl@0: 			nameB->data[i-6]='\0';
sl@0: 			break;
sl@0: 			}
sl@0: 		}
sl@0: 	hl=0;
sl@0: 	if (!BUF_MEM_grow(headerB,256))
sl@0: 		{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
sl@0: 	headerB->data[0]='\0';
sl@0: 	for (;;)
sl@0: 		{
sl@0: 		i=BIO_gets(bp,buf,254);
sl@0: 		if (i <= 0) break;
sl@0: 
sl@0: 		while ((i >= 0) && (buf[i] <= ' ')) i--;
sl@0: 		buf[++i]='\n'; buf[++i]='\0';
sl@0: 
sl@0: 		if (buf[0] == '\n') break;
sl@0: 		if (!BUF_MEM_grow(headerB,hl+i+9))
sl@0: 			{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
sl@0: 		if (strncmp(buf,"-----END ",9) == 0)
sl@0: 			{
sl@0: 			nohead=1;
sl@0: 			break;
sl@0: 			}
sl@0: 		memcpy(&(headerB->data[hl]),buf,i);
sl@0: 		headerB->data[hl+i]='\0';
sl@0: 		hl+=i;
sl@0: 		}
sl@0: 
sl@0: 	bl=0;
sl@0: 	if (!BUF_MEM_grow(dataB,1024))
sl@0: 		{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
sl@0: 	dataB->data[0]='\0';
sl@0: 	if (!nohead)
sl@0: 		{
sl@0: 		for (;;)
sl@0: 			{
sl@0: 			i=BIO_gets(bp,buf,254);
sl@0: 			if (i <= 0) break;
sl@0: 
sl@0: 			while ((i >= 0) && (buf[i] <= ' ')) i--;
sl@0: 			buf[++i]='\n'; buf[++i]='\0';
sl@0: 
sl@0: 			if (i != 65) end=1;
sl@0: 			if (strncmp(buf,"-----END ",9) == 0)
sl@0: 				break;
sl@0: 			if (i > 65) break;
sl@0: 			if (!BUF_MEM_grow_clean(dataB,i+bl+9))
sl@0: 				{
sl@0: 				PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
sl@0: 				goto err;
sl@0: 				}
sl@0: 			memcpy(&(dataB->data[bl]),buf,i);
sl@0: 			dataB->data[bl+i]='\0';
sl@0: 			bl+=i;
sl@0: 			if (end)
sl@0: 				{
sl@0: 				buf[0]='\0';
sl@0: 				i=BIO_gets(bp,buf,254);
sl@0: 				if (i <= 0) break;
sl@0: 
sl@0: 				while ((i >= 0) && (buf[i] <= ' ')) i--;
sl@0: 				buf[++i]='\n'; buf[++i]='\0';
sl@0: 
sl@0: 				break;
sl@0: 				}
sl@0: 			}
sl@0: 		}
sl@0: 	else
sl@0: 		{
sl@0: 		tmpB=headerB;
sl@0: 		headerB=dataB;
sl@0: 		dataB=tmpB;
sl@0: 		bl=hl;
sl@0: 		}
sl@0: 	i=strlen(nameB->data);
sl@0: 	if (	(strncmp(buf,"-----END ",9) != 0) ||
sl@0: 		(strncmp(nameB->data,&(buf[9]),i) != 0) ||
sl@0: 		(strncmp(&(buf[9+i]),"-----\n",6) != 0))
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
sl@0: 		goto err;
sl@0: 		}
sl@0: 
sl@0: 	EVP_DecodeInit(&ctx);
sl@0: 	i=EVP_DecodeUpdate(&ctx,
sl@0: 		(unsigned char *)dataB->data,&bl,
sl@0: 		(unsigned char *)dataB->data,bl);
sl@0: 	if (i < 0)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
sl@0: 		goto err;
sl@0: 		}
sl@0: 	i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
sl@0: 	if (i < 0)
sl@0: 		{
sl@0: 		PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
sl@0: 		goto err;
sl@0: 		}
sl@0: 	bl+=k;
sl@0: 
sl@0: 	if (bl == 0) goto err;
sl@0: 	*name=nameB->data;
sl@0: 	*header=headerB->data;
sl@0: 	*data=(unsigned char *)dataB->data;
sl@0: 	*len=bl;
sl@0: 	OPENSSL_free(nameB);
sl@0: 	OPENSSL_free(headerB);
sl@0: 	OPENSSL_free(dataB);
sl@0: 	return(1);
sl@0: err:
sl@0: 	BUF_MEM_free(nameB);
sl@0: 	BUF_MEM_free(headerB);
sl@0: 	BUF_MEM_free(dataB);
sl@0: 	return(0);
sl@0: 	}