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virtualx-engine/drivers/builtin_openssl/crypto/pem/pem_lib.c
Juan Linietsky 87f37bc5a3 -Added OpenSSL and HTTPS support 
-Built-in version of the library for Windows, Android and iOS (other OSs use system one)
-Small fixes all around
2014-04-28 21:56:43 -03:00

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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 <ctype.h>
#include "cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/objects.h>
#include <openssl/evp.h>
#include <openssl/rand.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
#include "asn1_locl.h"
#ifndef OPENSSL_NO_DES
#include <openssl/des.h>
#endif
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
const char PEM_version[]="PEM" OPENSSL_VERSION_PTEXT;
#define MIN_LENGTH 4
static int load_iv(char **fromp,unsigned char *to, int num);
static int check_pem(const char *nm, const char *name);
int pem_check_suffix(const char *pem_str, const char *suffix);
int PEM_def_callback(char *buf, int num, int w, void *key)
{
#ifdef OPENSSL_NO_FP_API
/* We should not ever call the default callback routine from
* windows. */
PEMerr(PEM_F_PEM_DEF_CALLBACK,ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED);
return(-1);
#else
int i,j;
const char *prompt;
if(key) {
i=strlen(key);
i=(i > num)?num:i;
memcpy(buf,key,i);
return(i);
}
prompt=EVP_get_pw_prompt();
if (prompt == NULL)
prompt="Enter PEM pass phrase:";
for (;;)
{
i=EVP_read_pw_string_min(buf,MIN_LENGTH,num,prompt,w);
if (i != 0)
{
PEMerr(PEM_F_PEM_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(char *buf, int type)
{
const 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";
BUF_strlcat(buf,"Proc-Type: 4,",PEM_BUFSIZE);
BUF_strlcat(buf,str,PEM_BUFSIZE);
BUF_strlcat(buf,"\n",PEM_BUFSIZE);
}
void PEM_dek_info(char *buf, const char *type, int len, char *str)
{
static const unsigned char map[17]="0123456789ABCDEF";
long i;
int j;
BUF_strlcat(buf,"DEK-Info: ",PEM_BUFSIZE);
BUF_strlcat(buf,type,PEM_BUFSIZE);
BUF_strlcat(buf,",",PEM_BUFSIZE);
j=strlen(buf);
if (j + (len * 2) + 1 > PEM_BUFSIZE)
return;
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 OPENSSL_NO_FP_API
void *PEM_ASN1_read(d2i_of_void *d2i, const char *name, FILE *fp, void **x,
pem_password_cb *cb, void *u)
{
BIO *b;
void *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,u);
BIO_free(b);
return(ret);
}
#endif
static int check_pem(const char *nm, const char *name)
{
/* Normal matching nm and name */
if (!strcmp(nm,name)) return 1;
/* Make PEM_STRING_EVP_PKEY match any private key */
if(!strcmp(name,PEM_STRING_EVP_PKEY))
{
int slen;
const EVP_PKEY_ASN1_METHOD *ameth;
if(!strcmp(nm,PEM_STRING_PKCS8))
return 1;
if(!strcmp(nm,PEM_STRING_PKCS8INF))
return 1;
slen = pem_check_suffix(nm, "PRIVATE KEY");
if (slen > 0)
{
/* NB: ENGINE implementations wont contain
* a deprecated old private key decode function
* so don't look for them.
*/
ameth = EVP_PKEY_asn1_find_str(NULL, nm, slen);
if (ameth && ameth->old_priv_decode)
return 1;
}
return 0;
}
if(!strcmp(name,PEM_STRING_PARAMETERS))
{
int slen;
const EVP_PKEY_ASN1_METHOD *ameth;
slen = pem_check_suffix(nm, "PARAMETERS");
if (slen > 0)
{
ENGINE *e;
ameth = EVP_PKEY_asn1_find_str(&e, nm, slen);
if (ameth)
{
int r;
if (ameth->param_decode)
r = 1;
else
r = 0;
#ifndef OPENSSL_NO_ENGINE
if (e)
ENGINE_finish(e);
#endif
return r;
}
}
return 0;
}
/* Permit older strings */
if(!strcmp(nm,PEM_STRING_X509_OLD) &&
!strcmp(name,PEM_STRING_X509)) return 1;
if(!strcmp(nm,PEM_STRING_X509_REQ_OLD) &&
!strcmp(name,PEM_STRING_X509_REQ)) return 1;
/* Allow normal certs to be read as trusted certs */
if(!strcmp(nm,PEM_STRING_X509) &&
!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
if(!strcmp(nm,PEM_STRING_X509_OLD) &&
!strcmp(name,PEM_STRING_X509_TRUSTED)) return 1;
/* Some CAs use PKCS#7 with CERTIFICATE headers */
if(!strcmp(nm, PEM_STRING_X509) &&
!strcmp(name, PEM_STRING_PKCS7)) return 1;
if(!strcmp(nm, PEM_STRING_PKCS7_SIGNED) &&
!strcmp(name, PEM_STRING_PKCS7)) return 1;
#ifndef OPENSSL_NO_CMS
if(!strcmp(nm, PEM_STRING_X509) &&
!strcmp(name, PEM_STRING_CMS)) return 1;
/* Allow CMS to be read from PKCS#7 headers */
if(!strcmp(nm, PEM_STRING_PKCS7) &&
!strcmp(name, PEM_STRING_CMS)) return 1;
#endif
return 0;
}
int PEM_bytes_read_bio(unsigned char **pdata, long *plen, char **pnm, const char *name, BIO *bp,
pem_password_cb *cb, void *u)
{
EVP_CIPHER_INFO cipher;
char *nm=NULL,*header=NULL;
unsigned char *data=NULL;
long len;
int ret = 0;
for (;;)
{
if (!PEM_read_bio(bp,&nm,&header,&data,&len)) {
if(ERR_GET_REASON(ERR_peek_error()) ==
PEM_R_NO_START_LINE)
ERR_add_error_data(2, "Expecting: ", name);
return 0;
}
if(check_pem(nm, name)) break;
OPENSSL_free(nm);
OPENSSL_free(header);
OPENSSL_free(data);
}
if (!PEM_get_EVP_CIPHER_INFO(header,&cipher)) goto err;
if (!PEM_do_header(&cipher,data,&len,cb,u)) goto err;
*pdata = data;
*plen = len;
if (pnm)
*pnm = nm;
ret = 1;
err:
if (!ret || !pnm) OPENSSL_free(nm);
OPENSSL_free(header);
if (!ret) OPENSSL_free(data);
return ret;
}
#ifndef OPENSSL_NO_FP_API
int PEM_ASN1_write(i2d_of_void *i2d, const char *name, FILE *fp,
void *x, const EVP_CIPHER *enc, unsigned char *kstr,
int klen, pem_password_cb *callback, void *u)
{
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,u);
BIO_free(b);
return(ret);
}
#endif
int PEM_ASN1_write_bio(i2d_of_void *i2d, const char *name, BIO *bp,
void *x, const EVP_CIPHER *enc, unsigned char *kstr,
int klen, pem_password_cb *callback, void *u)
{
EVP_CIPHER_CTX ctx;
int dsize=0,i,j,ret=0;
unsigned char *p,*data=NULL;
const char *objstr=NULL;
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_ASN1_LIB);
dsize=0;
goto err;
}
/* dzise + 8 bytes are needed */
/* actually it needs the cipher block size extra... */
data=(unsigned char *)OPENSSL_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=PEM_def_callback(buf,PEM_BUFSIZE,1,u);
else
klen=(*callback)(buf,PEM_BUFSIZE,1,u);
if (klen <= 0)
{
PEMerr(PEM_F_PEM_ASN1_WRITE_BIO,PEM_R_READ_KEY);
goto err;
}
#ifdef CHARSET_EBCDIC
/* Convert the pass phrase from EBCDIC */
ebcdic2ascii(buf, buf, klen);
#endif
kstr=(unsigned char *)buf;
}
RAND_add(data,i,0);/* put in the RSA key. */
OPENSSL_assert(enc->iv_len <= (int)sizeof(iv));
if (RAND_pseudo_bytes(iv,enc->iv_len) < 0) /* Generate a salt */
goto err;
/* The 'iv' is used as the iv and as a salt. It is
* NOT taken from the BytesToKey function */
if (!EVP_BytesToKey(enc,EVP_md5(),iv,kstr,klen,1,key,NULL))
goto err;
if (kstr == (unsigned char *)buf) OPENSSL_cleanse(buf,PEM_BUFSIZE);
OPENSSL_assert(strlen(objstr)+23+2*enc->iv_len+13 <= sizeof buf);
buf[0]='\0';
PEM_proc_type(buf,PEM_TYPE_ENCRYPTED);
PEM_dek_info(buf,objstr,enc->iv_len,(char *)iv);
/* k=strlen(buf); */
EVP_CIPHER_CTX_init(&ctx);
ret = 1;
if (!EVP_EncryptInit_ex(&ctx,enc,NULL,key,iv)
|| !EVP_EncryptUpdate(&ctx,data,&j,data,i)
|| !EVP_EncryptFinal_ex(&ctx,&(data[j]),&i))
ret = 0;
EVP_CIPHER_CTX_cleanup(&ctx);
if (ret == 0)
goto err;
i+=j;
}
else
{
ret=1;
buf[0]='\0';
}
i=PEM_write_bio(bp,name,buf,data,i);
if (i <= 0) ret=0;
err:
OPENSSL_cleanse(key,sizeof(key));
OPENSSL_cleanse(iv,sizeof(iv));
OPENSSL_cleanse((char *)&ctx,sizeof(ctx));
OPENSSL_cleanse(buf,PEM_BUFSIZE);
if (data != NULL)
{
OPENSSL_cleanse(data,(unsigned int)dsize);
OPENSSL_free(data);
}
return(ret);
}
int PEM_do_header(EVP_CIPHER_INFO *cipher, unsigned char *data, long *plen,
pem_password_cb *callback,void *u)
{
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=PEM_def_callback(buf,PEM_BUFSIZE,0,u);
else
klen=callback(buf,PEM_BUFSIZE,0,u);
if (klen <= 0)
{
PEMerr(PEM_F_PEM_DO_HEADER,PEM_R_BAD_PASSWORD_READ);
return(0);
}
#ifdef CHARSET_EBCDIC
/* Convert the pass phrase from EBCDIC */
ebcdic2ascii(buf, buf, klen);
#endif
if (!EVP_BytesToKey(cipher->cipher,EVP_md5(),&(cipher->iv[0]),
(unsigned char *)buf,klen,1,key,NULL))
return 0;
j=(int)len;
EVP_CIPHER_CTX_init(&ctx);
o = EVP_DecryptInit_ex(&ctx,cipher->cipher,NULL, key,&(cipher->iv[0]));
if (o)
o = EVP_DecryptUpdate(&ctx,data,&i,data,j);
if (o)
o = EVP_DecryptFinal_ex(&ctx,&(data[i]),&j);
EVP_CIPHER_CTX_cleanup(&ctx);
OPENSSL_cleanse((char *)buf,sizeof(buf));
OPENSSL_cleanse((char *)key,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(char *header, EVP_CIPHER_INFO *cipher)
{
const EVP_CIPHER *enc=NULL;
char *p,c;
char **header_pp = &header;
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;
#ifndef CHARSET_EBCDIC
if (!( ((c >= 'A') && (c <= 'Z')) || (c == '-') ||
((c >= '0') && (c <= '9'))))
break;
#else
if (!( isupper(c) || (c == '-') ||
isdigit(c)))
break;
#endif
header++;
}
*header='\0';
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(header_pp,&(cipher->iv[0]),enc->iv_len))
return(0);
return(1);
}
static int load_iv(char **fromp, unsigned char *to, int num)
{
int v,i;
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 OPENSSL_NO_FP_API
int PEM_write(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(BIO *bp, const char *name, char *header, unsigned char *data,
long len)
{
int nlen,n,i,j,outl;
unsigned char *buf = NULL;
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 = OPENSSL_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;
OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
OPENSSL_free(buf);
buf = NULL;
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:
if (buf) {
OPENSSL_cleanse(buf, PEM_BUFSIZE*8);
OPENSSL_free(buf);
}
PEMerr(PEM_F_PEM_WRITE_BIO,reason);
return(0);
}
#ifndef OPENSSL_NO_FP_API
int PEM_read(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(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))
{
BUF_MEM_free(nameB);
BUF_MEM_free(headerB);
BUF_MEM_free(dataB);
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;
}
memcpy(nameB->data,&(buf[11]),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;
}
memcpy(&(headerB->data[hl]),buf,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_clean(dataB,i+bl+9))
{
PEMerr(PEM_F_PEM_READ_BIO,ERR_R_MALLOC_FAILURE);
goto err;
}
memcpy(&(dataB->data[bl]),buf,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]),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;
OPENSSL_free(nameB);
OPENSSL_free(headerB);
OPENSSL_free(dataB);
return(1);
err:
BUF_MEM_free(nameB);
BUF_MEM_free(headerB);
BUF_MEM_free(dataB);
return(0);
}
/* Check pem string and return prefix length.
* If for example the pem_str == "RSA PRIVATE KEY" and suffix = "PRIVATE KEY"
* the return value is 3 for the string "RSA".
*/
int pem_check_suffix(const char *pem_str, const char *suffix)
{
int pem_len = strlen(pem_str);
int suffix_len = strlen(suffix);
const char *p;
if (suffix_len + 1 >= pem_len)
return 0;
p = pem_str + pem_len - suffix_len;
if (strcmp(p, suffix))
return 0;
p--;
if (*p != ' ')
return 0;
return p - pem_str;
}
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