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openssl/crypto/pem/pem_lib.c
Ralf S. Engelschall 9cb0969f65 Fix version stuff: 
1. The already released version was 0.9.1c and not 0.9.1b

2. The next release should be 0.9.2 and not 0.9.1d, because
   first the changes are already too large, second we should avoid any more
   0.9.1x confusions and third, the Apache version semantics of
   VERSION.REVISION.PATCHLEVEL for the version string is reasonable (and here
   .2 is already just a patchlevel and not major change).
tVS: ----------------------------------------------------------------------
1998-12-31 09:36:40 +00:00

762 lines
17 KiB
C
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/* crypto/pem/pem_lib.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.]
*/
#include <stdio.h>
#include "cryptlib.h"
#include "buffer.h"
#include "objects.h"
#include "evp.h"
#include "rand.h"
#include "x509.h"
#include "pem.h"
#ifndef NO_DES
#include "des.h"
#endif
char *PEM_version="PEM part of OpenSSL 0.9.2 31-Dec-1998";
#define MIN_LENGTH 4
/* PEMerr(PEM_F_PEM_WRITE_BIO,ERR_R_MALLOC_FAILURE);
* PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
*/
#ifndef NOPROTO
static int def_callback(char *buf, int num, int w);
static int load_iv(unsigned char **fromp,unsigned char *to, int num);
#else
static int def_callback();
static int load_iv();
#endif
static int def_callback(buf, num, w)
char *buf;
int num;
int w;
{
#ifdef NO_FP_API
/* We should not ever call the default callback routine from
* windows. */
PEMerr(PEM_F_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return(-1);
#else
int i,j;
char *prompt;
prompt=EVP_get_pw_prompt();
if (prompt == NULL)
prompt="Enter PEM pass phrase:";
for (;;)
{
i=EVP_read_pw_string(buf,num,prompt,w);
if (i != 0)
{
PEMerr(PEM_F_DEF_CALLBACK,PEM_R_PROBLEMS_GETTING_PASSWORD);
memset(buf,0,(unsigned int)num);
return(-1);
}
j=strlen(buf);
if (j < MIN_LENGTH)
{
fprintf(stderr,"phrase is too short, needs to be at least %d chars\n",MIN_LENGTH);
}
else
break;
}
return(j);
#endif
}
void PEM_proc_type(buf, type)
char *buf;
int type;
{
char *str;
if (type == PEM_TYPE_ENCRYPTED)
str="ENCRYPTED";
else if (type == PEM_TYPE_MIC_CLEAR)
str="MIC-CLEAR";
else if (type == PEM_TYPE_MIC_ONLY)
str="MIC-ONLY";
else
str="BAD-TYPE";
strcat(buf,"Proc-Type: 4,");
strcat(buf,str);
strcat(buf,"\n");
}
void PEM_dek_info(buf, type, len, str)
char *buf;
char *type;
int len;
char *str;
{
static unsigned char map[17]="0123456789ABCDEF";
long i;
int j;
strcat(buf,"DEK-Info: ");
strcat(buf,type);
strcat(buf,",");
j=strlen(buf);
for (i=0; i<len; i++)
{
buf[j+i*2] =map[(str[i]>>4)&0x0f];
buf[j+i*2+1]=map[(str[i] )&0x0f];
}
buf[j+i*2]='\n';
buf[j+i*2+1]='\0';
}
#ifndef NO_FP_API
char *PEM_ASN1_read(d2i,name,fp, x, cb)
char *(*d2i)();
char *name;
FILE *fp;
char **x;
int (*cb)();
{
BIO *b;
char *ret;
if ((b=BIO_new(BIO_s_file())) == NULL)
{
PEMerr(PEM_F_PEM_ASN1_READ,ERR_R_BUF_LIB);
return(0);
}
BIO_set_fp(b,fp,BIO_NOCLOSE);
ret=PEM_ASN1_read_bio(d2i,name,b,x,cb);
BIO_free(b);
return(ret);
}
#endif
char *PEM_ASN1_read_bio(d2i,name,bp, x, cb)
char *(*d2i)();
char *name;
BIO *bp;
char **x;
int (*cb)();
{
EVP_CIPHER_INFO cipher;
char *nm=NULL,*header=NULL;
unsigned char *p=NULL,*data=NULL;
long len;
char *ret=NULL;
for (;;)
{
if (!PEM_read_bio(bp,&nm,&header,&data,&len)) return(NULL);
if ( (strcmp(nm,name) == 0) ||
((strcmp(nm,PEM_STRING_RSA) == 0) &&
(strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
((strcmp(nm,PEM_STRING_DSA) == 0) &&
(strcmp(name,PEM_STRING_EVP_PKEY) == 0)) ||
((strcmp(nm,PEM_STRING_X509_OLD) == 0) &&
(strcmp(name,PEM_STRING_X509) == 0)) ||
((strcmp(nm,PEM_STRING_X509_REQ_OLD) == 0) &&
(strcmp(name,PEM_STRING_X509_REQ) == 0))
)
break;
Free(nm);
Free(header);
Free(data);
}
if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
if (!PEM_do_header(&cipher,data,&len,cb)) goto err;
p=data;
if (strcmp(name,PEM_STRING_EVP_PKEY) == 0)
{
if (strcmp(nm,PEM_STRING_RSA) == 0)
ret=d2i(EVP_PKEY_RSA,x,&p,len);
else if (strcmp(nm,PEM_STRING_DSA) == 0)
ret=d2i(EVP_PKEY_DSA,x,&p,len);
}
else
ret=d2i(x,&p,len);
if (ret == NULL)
PEMerr(PEM_F_PEM_ASN1_READ_BIO,ERR_R_ASN1_LIB);
err:
Free(nm);
Free(header);
Free(data);
return(ret);
}
#ifndef NO_FP_API
int PEM_ASN1_write(i2d,name,fp, x, enc, kstr, klen, callback)
int (*i2d)();
char *name;
FILE *fp;
char *x;
EVP_CIPHER *enc;
unsigned char *kstr;
int klen;
int (*callback)();
{
BIO *b;
int ret;
if ((b=BIO_new(BIO_s_file())) == NULL)
{
PEMerr(PEM_F_PEM_ASN1_WRITE,ERR_R_BUF_LIB);
return(0);
}
BIO_set_fp(b,fp,BIO_NOCLOSE);
ret=PEM_ASN1_write_bio(i2d,name,b,x,enc,kstr,klen,callback);
BIO_free(b);
return(ret);
}
#endif
int PEM_ASN1_write_bio(i2d,name,bp, x, enc, kstr, klen, callback)
int (*i2d)();
char *name;
BIO *bp;
char *x;
EVP_CIPHER *enc;
unsigned char *kstr;
int klen;
int (*callback)();
{
EVP_CIPHER_CTX ctx;
int dsize=0,i,j,ret=0;
unsigned char *p,*data=NULL;
char *objstr=NULL;
#define PEM_BUFSIZE 1024
char buf[PEM_BUFSIZE];
unsigned char key[EVP_MAX_KEY_LENGTH];
unsigned char iv[EVP_MAX_IV_LENGTH];
if (enc != NULL)
{
objstr=OBJ_nid2sn(EVP_CIPHER_nid(enc));
if (objstr == NULL)
{
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_UNSUPPORTED_CIPHER);
goto err;
}
}
if ((dsize=i2d(x,NULL)) < 0)
{
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
dsize=0;
goto err;
}
/* dzise + 8 bytes are needed */
data=(unsigned char *)Malloc((unsigned int)dsize+20);
if (data == NULL)
{
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,ERR_R_MALLOC_FAILURE);
goto err;
}
p=data;
i=i2d(x,&p);
if (enc != NULL)
{
if (kstr == NULL)
{
if (callback == NULL)
klen=def_callback(buf,PEM_BUFSIZE,1);
else
klen=(*callback)(buf,PEM_BUFSIZE,1);
if (klen <= 0)
{
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
goto err;
}
kstr=(unsigned char *)buf;
}
RAND_seed(data,i);/* put in the RSA key. */
RAND_bytes(iv,8); /* Generate a salt */
/* The 'iv' is used as the iv and as a salt. It is
* NOT taken from the BytesToKey function */
EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL);
if (kstr == (unsigned char *)buf) memset(buf,0,PEM_BUFSIZE);
buf[0]='\0';
PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
PEM_dek_info(buf,objstr,8,(char *)iv);
/* k=strlen(buf); */
EVP_EncryptInit(&ctx,enc,key,iv);
EVP_EncryptUpdate(&ctx,data,&j,data,i);
EVP_EncryptFinal(&ctx,&(data[j]),&i);
i+=j;
ret=1;
}
else
{
ret=1;
buf[0]='\0';
}
i=PEM_write_bio(bp,name,buf,data,i);
if (i <= 0) ret=0;
err:
memset(key,0,sizeof(key));
memset(iv,0,sizeof(iv));
memset((char *)&ctx,0,sizeof(ctx));
memset(buf,0,PEM_BUFSIZE);
memset(data,0,(unsigned int)dsize);
Free(data);
return(ret);
}
int PEM_do_header(cipher, data, plen, callback)
EVP_CIPHER_INFO *cipher;
unsigned char *data;
long *plen;
int (*callback)();
{
int i,j,o,klen;
long len;
EVP_CIPHER_CTX ctx;
unsigned char key[EVP_MAX_KEY_LENGTH];
char buf[PEM_BUFSIZE];
len= *plen;
if (cipher->cipher == NULL) return(1);
if (callback == NULL)
klen=def_callback(buf,PEM_BUFSIZE,0);
else
klen=callback(buf,PEM_BUFSIZE,0);
if (klen <= 0)
{
PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
return(0);
}
EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
(unsigned char *)buf,klen,1,key,NULL);
j=(int)len;
EVP_DecryptInit(&ctx,cipher->cipher,key,&(cipher->iv[0]));
EVP_DecryptUpdate(&ctx,data,&i,data,j);
o=EVP_DecryptFinal(&ctx,&(data[i]),&j);
EVP_CIPHER_CTX_cleanup(&ctx);
memset((char *)buf,0,sizeof(buf));
memset((char *)key,0,sizeof(key));
j+=i;
if (!o)
{
PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_DECRYPT);
return(0);
}
*plen=j;
return(1);
}
int PEM_get_EVP_CIPHER_INFO(header,cipher)
char *header;
EVP_CIPHER_INFO *cipher;
{
int o;
EVP_CIPHER *enc=NULL;
char *p,c;
cipher->cipher=NULL;
if ((header == NULL) || (*header == '\0') || (*header == '\n'))
return(1);
if (strncmp(header,"Proc-Type: ",11) != 0)
{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_PROC_TYPE); return(0); }
header+=11;
if (*header != '4') return(0); header++;
if (*header != ',') return(0); header++;
if (strncmp(header,"ENCRYPTED",9) != 0)
{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_ENCRYPTED); return(0); }
for (; (*header != '\n') && (*header != '\0'); header++)
;
if (*header == '\0')
{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_SHORT_HEADER); return(0); }
header++;
if (strncmp(header,"DEK-Info: ",10) != 0)
{ PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_NOT_DEK_INFO); return(0); }
header+=10;
p=header;
for (;;)
{
c= *header;
if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
((c >= '0') && (c <= '9'))))
break;
header++;
}
*header='\0';
o=OBJ_sn2nid(p);
cipher->cipher=enc=EVP_get_cipherbyname(p);
*header=c;
header++;
if (enc == NULL)
{
PEMerr(PEM_F_PEM_GET_EVP_CIPHER_INFO,PEM_R_UNSUPPORTED_ENCRYPTION);
return(0);
}
if (!load_iv((unsigned char **)&header,&(cipher->iv[0]),8)) return(0);
return(1);
}
static int load_iv(fromp,to,num)
unsigned char **fromp,*to;
int num;
{
int v,i;
unsigned char *from;
from= *fromp;
for (i=0; i<num; i++) to[i]=0;
num*=2;
for (i=0; i<num; i++)
{
if ((*from >= '0') && (*from <= '9'))
v= *from-'0';
else if ((*from >= 'A') && (*from <= 'F'))
v= *from-'A'+10;
else if ((*from >= 'a') && (*from <= 'f'))
v= *from-'a'+10;
else
{
PEMerr(PEM_F_LOAD_IV,PEM_R_BAD_IV_CHARS);
return(0);
}
from++;
to[i/2]|=v<<(long)((!(i&1))*4);
}
*fromp=from;
return(1);
}
#ifndef NO_FP_API
int PEM_write(fp, name, header, data,len)
FILE *fp;
char *name;
char *header;
unsigned char *data;
long len;
{
BIO *b;
int ret;
if ((b=BIO_new(BIO_s_file())) == NULL)
{
PEMerr(PEM_F_PEM_WRITE,ERR_R_BUF_LIB);
return(0);
}
BIO_set_fp(b,fp,BIO_NOCLOSE);
ret=PEM_write_bio(b, name, header, data,len);
BIO_free(b);
return(ret);
}
#endif
int PEM_write_bio(bp, name, header, data,len)
BIO *bp;
char *name;
char *header;
unsigned char *data;
long len;
{
int nlen,n,i,j,outl;
unsigned char *buf;
EVP_ENCODE_CTX ctx;
int reason=ERR_R_BUF_LIB;
EVP_EncodeInit(&ctx);
nlen=strlen(name);
if ( (BIO_write(bp,"-----BEGIN ",11) != 11) ||
(BIO_write(bp,name,nlen) != nlen) ||
(BIO_write(bp,"-----\n",6) != 6))
goto err;
i=strlen(header);
if (i > 0)
{
if ( (BIO_write(bp,header,i) != i) ||
(BIO_write(bp,"\n",1) != 1))
goto err;
}
buf=(unsigned char *)Malloc(PEM_BUFSIZE*8);
if (buf == NULL)
{
reason=ERR_R_MALLOC_FAILURE;
goto err;
}
i=j=0;
while (len > 0)
{
n=(int)((len>(PEM_BUFSIZE*5))?(PEM_BUFSIZE*5):len);
EVP_EncodeUpdate(&ctx,buf,&outl,&(data[j]),n);
if ((outl) && (BIO_write(bp,(char *)buf,outl) != outl))
goto err;
i+=outl;
len-=n;
j+=n;
}
EVP_EncodeFinal(&ctx,buf,&outl);
if ((outl > 0) && (BIO_write(bp,(char *)buf,outl) != outl)) goto err;
Free(buf);
if ( (BIO_write(bp,"-----END ",9) != 9) ||
(BIO_write(bp,name,nlen) != nlen) ||
(BIO_write(bp,"-----\n",6) != 6))
goto err;
return(i+outl);
err:
PEMerr(PEM_F_PEM_WRITE_BIO,reason);
return(0);
}
#ifndef NO_FP_API
int PEM_read(fp, name, header, data,len)
FILE *fp;
char **name;
char **header;
unsigned char **data;
long *len;
{
BIO *b;
int ret;
if ((b=BIO_new(BIO_s_file())) == NULL)
{
PEMerr(PEM_F_PEM_READ,ERR_R_BUF_LIB);
return(0);
}
BIO_set_fp(b,fp,BIO_NOCLOSE);
ret=PEM_read_bio(b, name, header, data,len);
BIO_free(b);
return(ret);
}
#endif
int PEM_read_bio(bp, name, header, data, len)
BIO *bp;
char **name;
char **header;
unsigned char **data;
long *len;
{
EVP_ENCODE_CTX ctx;
int end=0,i,k,bl=0,hl=0,nohead=0;
char buf[256];
BUF_MEM *nameB;
BUF_MEM *headerB;
BUF_MEM *dataB,*tmpB;
nameB=BUF_MEM_new();
headerB=BUF_MEM_new();
dataB=BUF_MEM_new();
if ((nameB == NULL) || (headerB == NULL) || (dataB == NULL))
{
PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
return(0);
}
buf[254]='\0';
for (;;)
{
i=BIO_gets(bp,buf,254);
if (i <= 0)
{
PEMerr(PEM_F_PEM_READ_BIO,PEM_R_NO_START_LINE);
goto err;
}
while ((i >= 0) && (buf[i] <= ' ')) i--;
buf[++i]='\n'; buf[++i]='\0';
if (strncmp(buf,"-----BEGIN ",11) == 0)
{
i=strlen(&(buf[11]));
if (strncmp(&(buf[11+i-6]),"-----\n",6) != 0)
continue;
if (!BUF_MEM_grow(nameB,i+9))
{
PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
goto err;
}
strncpy(nameB->data,&(buf[11]),(unsigned int)i-6);
nameB->data[i-6]='\0';
break;
}
}
hl=0;
if (!BUF_MEM_grow(headerB,256))
{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
headerB->data[0]='\0';
for (;;)
{
i=BIO_gets(bp,buf,254);
if (i <= 0) break;
while ((i >= 0) && (buf[i] <= ' ')) i--;
buf[++i]='\n'; buf[++i]='\0';
if (buf[0] == '\n') break;
if (!BUF_MEM_grow(headerB,hl+i+9))
{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
if (strncmp(buf,"-----END ",9) == 0)
{
nohead=1;
break;
}
strncpy(&(headerB->data[hl]),buf,(unsigned int)i);
headerB->data[hl+i]='\0';
hl+=i;
}
bl=0;
if (!BUF_MEM_grow(dataB,1024))
{ PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE); goto err; }
dataB->data[0]='\0';
if (!nohead)
{
for (;;)
{
i=BIO_gets(bp,buf,254);
if (i <= 0) break;
while ((i >= 0) && (buf[i] <= ' ')) i--;
buf[++i]='\n'; buf[++i]='\0';
if (i != 65) end=1;
if (strncmp(buf,"-----END ",9) == 0)
break;
if (i > 65) break;
if (!BUF_MEM_grow(dataB,i+bl+9))
{
PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
goto err;
}
strncpy(&(dataB->data[bl]),buf,(unsigned int)i);
dataB->data[bl+i]='\0';
bl+=i;
if (end)
{
buf[0]='\0';
i=BIO_gets(bp,buf,254);
if (i <= 0) break;
while ((i >= 0) && (buf[i] <= ' ')) i--;
buf[++i]='\n'; buf[++i]='\0';
break;
}
}
}
else
{
tmpB=headerB;
headerB=dataB;
dataB=tmpB;
bl=hl;
}
i=strlen(nameB->data);
if ( (strncmp(buf,"-----END ",9) != 0) ||
(strncmp(nameB->data,&(buf[9]),(unsigned int)i) != 0) ||
(strncmp(&(buf[9+i]),"-----\n",6) != 0))
{
PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_END_LINE);
goto err;
}
EVP_DecodeInit(&ctx);
i=EVP_DecodeUpdate(&ctx,
(unsigned char *)dataB->data,&bl,
(unsigned char *)dataB->data,bl);
if (i < 0)
{
PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
goto err;
}
i=EVP_DecodeFinal(&ctx,(unsigned char *)&(dataB->data[bl]),&k);
if (i < 0)
{
PEMerr(PEM_F_PEM_READ_BIO,PEM_R_BAD_BASE64_DECODE);
goto err;
}
bl+=k;
if (bl == 0) goto err;
*name=nameB->data;
*header=headerB->data;
*data=(unsigned char *)dataB->data;
*len=bl;
Free(nameB);
Free(headerB);
Free(dataB);
return(1);
err:
BUF_MEM_free(nameB);
BUF_MEM_free(headerB);
BUF_MEM_free(dataB);
return(0);
}
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