You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
466 lines
11 KiB
466 lines
11 KiB
/* crypto/evp/bio_ber.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 <errno.h>
|
|
#include "cryptlib.h"
|
|
#include <openssl/buffer.h>
|
|
#include <openssl/evp.h>
|
|
|
|
static int ber_write(BIO *h,char *buf,int num);
|
|
static int ber_read(BIO *h,char *buf,int size);
|
|
/*static int ber_puts(BIO *h,char *str); */
|
|
/*static int ber_gets(BIO *h,char *str,int size); */
|
|
static long ber_ctrl(BIO *h,int cmd,long arg1,char *arg2);
|
|
static int ber_new(BIO *h);
|
|
static int ber_free(BIO *data);
|
|
static long ber_callback_ctrl(BIO *h,int cmd,void *(*fp)());
|
|
#define BER_BUF_SIZE (32)
|
|
|
|
/* This is used to hold the state of the BER objects being read. */
|
|
typedef struct ber_struct
|
|
{
|
|
int tag;
|
|
int class;
|
|
long length;
|
|
int inf;
|
|
int num_left;
|
|
int depth;
|
|
} BER_CTX;
|
|
|
|
typedef struct bio_ber_struct
|
|
{
|
|
int tag;
|
|
int class;
|
|
long length;
|
|
int inf;
|
|
|
|
/* most of the following are used when doing non-blocking IO */
|
|
/* reading */
|
|
long num_left; /* number of bytes still to read/write in block */
|
|
int depth; /* used with indefinite encoding. */
|
|
int finished; /* No more read data */
|
|
|
|
/* writting */
|
|
char *w_addr;
|
|
int w_offset;
|
|
int w_left;
|
|
|
|
int buf_len;
|
|
int buf_off;
|
|
unsigned char buf[BER_BUF_SIZE];
|
|
} BIO_BER_CTX;
|
|
|
|
static BIO_METHOD methods_ber=
|
|
{
|
|
BIO_TYPE_CIPHER,"cipher",
|
|
ber_write,
|
|
ber_read,
|
|
NULL, /* ber_puts, */
|
|
NULL, /* ber_gets, */
|
|
ber_ctrl,
|
|
ber_new,
|
|
ber_free,
|
|
ber_callback_ctrl,
|
|
};
|
|
|
|
BIO_METHOD *BIO_f_ber(void)
|
|
{
|
|
return(&methods_ber);
|
|
}
|
|
|
|
static int ber_new(BIO *bi)
|
|
{
|
|
BIO_BER_CTX *ctx;
|
|
|
|
ctx=(BIO_BER_CTX *)OPENSSL_malloc(sizeof(BIO_BER_CTX));
|
|
if (ctx == NULL) return(0);
|
|
|
|
memset((char *)ctx,0,sizeof(BIO_BER_CTX));
|
|
|
|
bi->init=0;
|
|
bi->ptr=(char *)ctx;
|
|
bi->flags=0;
|
|
return(1);
|
|
}
|
|
|
|
static int ber_free(BIO *a)
|
|
{
|
|
BIO_BER_CTX *b;
|
|
|
|
if (a == NULL) return(0);
|
|
b=(BIO_BER_CTX *)a->ptr;
|
|
OPENSSL_cleanse(a->ptr,sizeof(BIO_BER_CTX));
|
|
OPENSSL_free(a->ptr);
|
|
a->ptr=NULL;
|
|
a->init=0;
|
|
a->flags=0;
|
|
return(1);
|
|
}
|
|
|
|
int bio_ber_get_header(BIO *bio, BIO_BER_CTX *ctx)
|
|
{
|
|
char buf[64];
|
|
int i,j,n;
|
|
int ret;
|
|
unsigned char *p;
|
|
unsigned long length
|
|
int tag;
|
|
int class;
|
|
long max;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
/* Pack the buffer down if there is a hole at the front */
|
|
if (ctx->buf_off != 0)
|
|
{
|
|
p=ctx->buf;
|
|
j=ctx->buf_off;
|
|
n=ctx->buf_len-j;
|
|
for (i=0; i<n; i++)
|
|
{
|
|
p[0]=p[j];
|
|
p++;
|
|
}
|
|
ctx->buf_len-j;
|
|
ctx->buf_off=0;
|
|
}
|
|
|
|
/* If there is more room, read some more data */
|
|
i=BER_BUF_SIZE-ctx->buf_len;
|
|
if (i)
|
|
{
|
|
i=BIO_read(bio->next_bio,&(ctx->buf[ctx->buf_len]),i);
|
|
if (i <= 0)
|
|
{
|
|
BIO_copy_next_retry(b);
|
|
return(i);
|
|
}
|
|
else
|
|
ctx->buf_len+=i;
|
|
}
|
|
|
|
max=ctx->buf_len;
|
|
p=ctx->buf;
|
|
ret=ASN1_get_object(&p,&length,&tag,&class,max);
|
|
|
|
if (ret & 0x80)
|
|
{
|
|
if ((ctx->buf_len < BER_BUF_SIZE) &&
|
|
(ERR_GET_REASON(ERR_peek_error()) == ASN1_R_TOO_LONG))
|
|
{
|
|
ERR_clear_error(); /* clear the error */
|
|
BIO_set_retry_read(b);
|
|
}
|
|
return(-1);
|
|
}
|
|
|
|
/* We have no error, we have a header, so make use of it */
|
|
|
|
if ((ctx->tag >= 0) && (ctx->tag != tag))
|
|
{
|
|
BIOerr(BIO_F_BIO_BER_GET_HEADER,BIO_R_TAG_MISMATCH);
|
|
sprintf(buf,"tag=%d, got %d",ctx->tag,tag);
|
|
ERR_add_error_data(1,buf);
|
|
return(-1);
|
|
}
|
|
if (ret & 0x01)
|
|
if (ret & V_ASN1_CONSTRUCTED)
|
|
}
|
|
|
|
static int ber_read(BIO *b, char *out, int outl)
|
|
{
|
|
int ret=0,i,n;
|
|
BIO_BER_CTX *ctx;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
|
|
if (out == NULL) return(0);
|
|
ctx=(BIO_BER_CTX *)b->ptr;
|
|
|
|
if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
|
|
|
|
if (ctx->finished) return(0);
|
|
|
|
again:
|
|
/* First see if we are half way through reading a block */
|
|
if (ctx->num_left > 0)
|
|
{
|
|
if (ctx->num_left < outl)
|
|
n=ctx->num_left;
|
|
else
|
|
n=outl;
|
|
i=BIO_read(b->next_bio,out,n);
|
|
if (i <= 0)
|
|
{
|
|
BIO_copy_next_retry(b);
|
|
return(i);
|
|
}
|
|
ctx->num_left-=i;
|
|
outl-=i;
|
|
ret+=i;
|
|
if (ctx->num_left <= 0)
|
|
{
|
|
ctx->depth--;
|
|
if (ctx->depth <= 0)
|
|
ctx->finished=1;
|
|
}
|
|
if (outl <= 0)
|
|
return(ret);
|
|
else
|
|
goto again;
|
|
}
|
|
else /* we need to read another BER header */
|
|
{
|
|
}
|
|
}
|
|
|
|
static int ber_write(BIO *b, char *in, int inl)
|
|
{
|
|
int ret=0,n,i;
|
|
BIO_ENC_CTX *ctx;
|
|
|
|
ctx=(BIO_ENC_CTX *)b->ptr;
|
|
ret=inl;
|
|
|
|
BIO_clear_retry_flags(b);
|
|
n=ctx->buf_len-ctx->buf_off;
|
|
while (n > 0)
|
|
{
|
|
i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
|
|
if (i <= 0)
|
|
{
|
|
BIO_copy_next_retry(b);
|
|
return(i);
|
|
}
|
|
ctx->buf_off+=i;
|
|
n-=i;
|
|
}
|
|
/* at this point all pending data has been written */
|
|
|
|
if ((in == NULL) || (inl <= 0)) return(0);
|
|
|
|
ctx->buf_off=0;
|
|
while (inl > 0)
|
|
{
|
|
n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl;
|
|
EVP_CipherUpdate(&(ctx->cipher),
|
|
(unsigned char *)ctx->buf,&ctx->buf_len,
|
|
(unsigned char *)in,n);
|
|
inl-=n;
|
|
in+=n;
|
|
|
|
ctx->buf_off=0;
|
|
n=ctx->buf_len;
|
|
while (n > 0)
|
|
{
|
|
i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
|
|
if (i <= 0)
|
|
{
|
|
BIO_copy_next_retry(b);
|
|
return(i);
|
|
}
|
|
n-=i;
|
|
ctx->buf_off+=i;
|
|
}
|
|
ctx->buf_len=0;
|
|
ctx->buf_off=0;
|
|
}
|
|
BIO_copy_next_retry(b);
|
|
return(ret);
|
|
}
|
|
|
|
static long ber_ctrl(BIO *b, int cmd, long num, char *ptr)
|
|
{
|
|
BIO *dbio;
|
|
BIO_ENC_CTX *ctx,*dctx;
|
|
long ret=1;
|
|
int i;
|
|
|
|
ctx=(BIO_ENC_CTX *)b->ptr;
|
|
|
|
switch (cmd)
|
|
{
|
|
case BIO_CTRL_RESET:
|
|
ctx->ok=1;
|
|
ctx->finished=0;
|
|
EVP_CipherInit_ex(&(ctx->cipher),NULL,NULL,NULL,NULL,
|
|
ctx->cipher.berrypt);
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
case BIO_CTRL_EOF: /* More to read */
|
|
if (ctx->cont <= 0)
|
|
ret=1;
|
|
else
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
case BIO_CTRL_WPENDING:
|
|
ret=ctx->buf_len-ctx->buf_off;
|
|
if (ret <= 0)
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
case BIO_CTRL_PENDING: /* More to read in buffer */
|
|
ret=ctx->buf_len-ctx->buf_off;
|
|
if (ret <= 0)
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
case BIO_CTRL_FLUSH:
|
|
/* do a final write */
|
|
again:
|
|
while (ctx->buf_len != ctx->buf_off)
|
|
{
|
|
i=ber_write(b,NULL,0);
|
|
if (i < 0)
|
|
{
|
|
ret=i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!ctx->finished)
|
|
{
|
|
ctx->finished=1;
|
|
ctx->buf_off=0;
|
|
ret=EVP_CipherFinal_ex(&(ctx->cipher),
|
|
(unsigned char *)ctx->buf,
|
|
&(ctx->buf_len));
|
|
ctx->ok=(int)ret;
|
|
if (ret <= 0) break;
|
|
|
|
/* push out the bytes */
|
|
goto again;
|
|
}
|
|
|
|
/* Finally flush the underlying BIO */
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
case BIO_C_GET_CIPHER_STATUS:
|
|
ret=(long)ctx->ok;
|
|
break;
|
|
case BIO_C_DO_STATE_MACHINE:
|
|
BIO_clear_retry_flags(b);
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
BIO_copy_next_retry(b);
|
|
break;
|
|
|
|
case BIO_CTRL_DUP:
|
|
dbio=(BIO *)ptr;
|
|
dctx=(BIO_ENC_CTX *)dbio->ptr;
|
|
memcpy(&(dctx->cipher),&(ctx->cipher),sizeof(ctx->cipher));
|
|
dbio->init=1;
|
|
break;
|
|
default:
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
static long ber_callback_ctrl(BIO *b, int cmd, void *(*fp)())
|
|
{
|
|
long ret=1;
|
|
|
|
if (b->next_bio == NULL) return(0);
|
|
switch (cmd)
|
|
{
|
|
default:
|
|
ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
|
|
break;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
/*
|
|
void BIO_set_cipher_ctx(b,c)
|
|
BIO *b;
|
|
EVP_CIPHER_ctx *c;
|
|
{
|
|
if (b == NULL) return;
|
|
|
|
if ((b->callback != NULL) &&
|
|
(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
|
|
return;
|
|
|
|
b->init=1;
|
|
ctx=(BIO_ENC_CTX *)b->ptr;
|
|
memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
|
|
|
|
if (b->callback != NULL)
|
|
b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
|
|
}
|
|
*/
|
|
|
|
void BIO_set_cipher(BIO *b, EVP_CIPHER *c, unsigned char *k, unsigned char *i,
|
|
int e)
|
|
{
|
|
BIO_ENC_CTX *ctx;
|
|
|
|
if (b == NULL) return;
|
|
|
|
if ((b->callback != NULL) &&
|
|
(b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
|
|
return;
|
|
|
|
b->init=1;
|
|
ctx=(BIO_ENC_CTX *)b->ptr;
|
|
EVP_CipherInit_ex(&(ctx->cipher),c,NULL,k,i,e);
|
|
|
|
if (b->callback != NULL)
|
|
b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
|
|
}
|
|
|
|
|