-=-=-=-=-=-=-=-=-=-=-=-=-= -Begin work on Navigation Meshes (simple pathfinding for now, will improve soon) -More doc on theme overriding -Upgraded OpenSSL to version without bugs -Misc bugfixes
599 lines
14 KiB
C
599 lines
14 KiB
C
/* crypto/evp/bio_b64.c */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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#include <stdio.h>
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#include <errno.h>
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#include "cryptlib.h"
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#include <openssl/buffer.h>
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#include <openssl/evp.h>
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static int b64_write(BIO *h, const char *buf, int num);
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static int b64_read(BIO *h, char *buf, int size);
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static int b64_puts(BIO *h, const char *str);
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/*static int b64_gets(BIO *h, char *str, int size); */
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static long b64_ctrl(BIO *h, int cmd, long arg1, void *arg2);
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static int b64_new(BIO *h);
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static int b64_free(BIO *data);
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static long b64_callback_ctrl(BIO *h,int cmd,bio_info_cb *fp);
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#define B64_BLOCK_SIZE 1024
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#define B64_BLOCK_SIZE2 768
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#define B64_NONE 0
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#define B64_ENCODE 1
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#define B64_DECODE 2
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typedef struct b64_struct
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{
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/*BIO *bio; moved to the BIO structure */
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int buf_len;
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int buf_off;
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int tmp_len; /* used to find the start when decoding */
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int tmp_nl; /* If true, scan until '\n' */
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int encode;
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int start; /* have we started decoding yet? */
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int cont; /* <= 0 when finished */
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EVP_ENCODE_CTX base64;
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char buf[EVP_ENCODE_LENGTH(B64_BLOCK_SIZE)+10];
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char tmp[B64_BLOCK_SIZE];
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} BIO_B64_CTX;
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static BIO_METHOD methods_b64=
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{
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BIO_TYPE_BASE64,"base64 encoding",
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b64_write,
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b64_read,
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b64_puts,
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NULL, /* b64_gets, */
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b64_ctrl,
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b64_new,
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b64_free,
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b64_callback_ctrl,
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};
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BIO_METHOD *BIO_f_base64(void)
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{
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return(&methods_b64);
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}
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static int b64_new(BIO *bi)
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{
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BIO_B64_CTX *ctx;
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ctx=(BIO_B64_CTX *)OPENSSL_malloc(sizeof(BIO_B64_CTX));
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if (ctx == NULL) return(0);
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ctx->buf_len=0;
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ctx->tmp_len=0;
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ctx->tmp_nl=0;
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ctx->buf_off=0;
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ctx->cont=1;
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ctx->start=1;
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ctx->encode=0;
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bi->init=1;
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bi->ptr=(char *)ctx;
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bi->flags=0;
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bi->num = 0;
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return(1);
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}
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static int b64_free(BIO *a)
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{
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if (a == NULL) return(0);
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OPENSSL_free(a->ptr);
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a->ptr=NULL;
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a->init=0;
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a->flags=0;
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return(1);
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}
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static int b64_read(BIO *b, char *out, int outl)
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{
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int ret=0,i,ii,j,k,x,n,num,ret_code=0;
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BIO_B64_CTX *ctx;
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unsigned char *p,*q;
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if (out == NULL) return(0);
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ctx=(BIO_B64_CTX *)b->ptr;
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if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
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BIO_clear_retry_flags(b);
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if (ctx->encode != B64_DECODE)
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{
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ctx->encode=B64_DECODE;
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ctx->buf_len=0;
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ctx->buf_off=0;
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ctx->tmp_len=0;
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EVP_DecodeInit(&(ctx->base64));
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}
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/* First check if there are bytes decoded/encoded */
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if (ctx->buf_len > 0)
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{
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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i=ctx->buf_len-ctx->buf_off;
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if (i > outl) i=outl;
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OPENSSL_assert(ctx->buf_off+i < (int)sizeof(ctx->buf));
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memcpy(out,&(ctx->buf[ctx->buf_off]),i);
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ret=i;
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out+=i;
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outl-=i;
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ctx->buf_off+=i;
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if (ctx->buf_len == ctx->buf_off)
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{
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ctx->buf_len=0;
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ctx->buf_off=0;
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}
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}
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/* At this point, we have room of outl bytes and an empty
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* buffer, so we should read in some more. */
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ret_code=0;
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while (outl > 0)
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{
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if (ctx->cont <= 0)
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break;
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i=BIO_read(b->next_bio,&(ctx->tmp[ctx->tmp_len]),
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B64_BLOCK_SIZE-ctx->tmp_len);
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if (i <= 0)
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{
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ret_code=i;
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/* Should we continue next time we are called? */
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if (!BIO_should_retry(b->next_bio))
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{
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ctx->cont=i;
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/* If buffer empty break */
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if(ctx->tmp_len == 0)
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break;
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/* Fall through and process what we have */
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else
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i = 0;
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}
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/* else we retry and add more data to buffer */
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else
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break;
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}
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i+=ctx->tmp_len;
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ctx->tmp_len = i;
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/* We need to scan, a line at a time until we
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* have a valid line if we are starting. */
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if (ctx->start && (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL))
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{
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/* ctx->start=1; */
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ctx->tmp_len=0;
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}
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else if (ctx->start)
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{
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q=p=(unsigned char *)ctx->tmp;
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num = 0;
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for (j=0; j<i; j++)
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{
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if (*(q++) != '\n') continue;
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/* due to a previous very long line,
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* we need to keep on scanning for a '\n'
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* before we even start looking for
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* base64 encoded stuff. */
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if (ctx->tmp_nl)
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{
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p=q;
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ctx->tmp_nl=0;
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continue;
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}
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k=EVP_DecodeUpdate(&(ctx->base64),
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(unsigned char *)ctx->buf,
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&num,p,q-p);
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if ((k <= 0) && (num == 0) && (ctx->start))
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EVP_DecodeInit(&ctx->base64);
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else
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{
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if (p != (unsigned char *)
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&(ctx->tmp[0]))
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{
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i-=(p- (unsigned char *)
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&(ctx->tmp[0]));
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for (x=0; x < i; x++)
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ctx->tmp[x]=p[x];
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}
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EVP_DecodeInit(&ctx->base64);
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ctx->start=0;
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break;
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}
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p=q;
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}
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/* we fell off the end without starting */
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if ((j == i) && (num == 0))
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{
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/* Is this is one long chunk?, if so, keep on
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* reading until a new line. */
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if (p == (unsigned char *)&(ctx->tmp[0]))
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{
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/* Check buffer full */
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if (i == B64_BLOCK_SIZE)
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{
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ctx->tmp_nl=1;
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ctx->tmp_len=0;
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}
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}
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else if (p != q) /* finished on a '\n' */
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{
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n=q-p;
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for (ii=0; ii<n; ii++)
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ctx->tmp[ii]=p[ii];
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ctx->tmp_len=n;
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}
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/* else finished on a '\n' */
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continue;
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}
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else
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{
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ctx->tmp_len=0;
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}
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}
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else if ((i < B64_BLOCK_SIZE) && (ctx->cont > 0))
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{
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/* If buffer isn't full and we can retry then
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* restart to read in more data.
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*/
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continue;
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}
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if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
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{
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int z,jj;
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#if 0
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jj=(i>>2)<<2;
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#else
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jj = i & ~3; /* process per 4 */
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#endif
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z=EVP_DecodeBlock((unsigned char *)ctx->buf,
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(unsigned char *)ctx->tmp,jj);
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if (jj > 2)
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{
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if (ctx->tmp[jj-1] == '=')
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{
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z--;
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if (ctx->tmp[jj-2] == '=')
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z--;
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}
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}
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/* z is now number of output bytes and jj is the
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* number consumed */
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if (jj != i)
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{
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memmove(ctx->tmp, &ctx->tmp[jj], i-jj);
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ctx->tmp_len=i-jj;
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}
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ctx->buf_len=0;
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if (z > 0)
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{
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ctx->buf_len=z;
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}
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i=z;
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}
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else
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{
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i=EVP_DecodeUpdate(&(ctx->base64),
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(unsigned char *)ctx->buf,&ctx->buf_len,
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(unsigned char *)ctx->tmp,i);
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ctx->tmp_len = 0;
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}
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ctx->buf_off=0;
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if (i < 0)
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{
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ret_code=0;
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ctx->buf_len=0;
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break;
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}
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if (ctx->buf_len <= outl)
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i=ctx->buf_len;
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else
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i=outl;
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memcpy(out,ctx->buf,i);
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ret+=i;
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ctx->buf_off=i;
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if (ctx->buf_off == ctx->buf_len)
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{
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ctx->buf_len=0;
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ctx->buf_off=0;
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}
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outl-=i;
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out+=i;
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}
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/* BIO_clear_retry_flags(b); */
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BIO_copy_next_retry(b);
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return((ret == 0)?ret_code:ret);
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}
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static int b64_write(BIO *b, const char *in, int inl)
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{
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int ret=0;
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int n;
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int i;
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BIO_B64_CTX *ctx;
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ctx=(BIO_B64_CTX *)b->ptr;
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BIO_clear_retry_flags(b);
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if (ctx->encode != B64_ENCODE)
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{
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ctx->encode=B64_ENCODE;
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ctx->buf_len=0;
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ctx->buf_off=0;
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ctx->tmp_len=0;
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EVP_EncodeInit(&(ctx->base64));
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}
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OPENSSL_assert(ctx->buf_off < (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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n=ctx->buf_len-ctx->buf_off;
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while (n > 0)
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{
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i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
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if (i <= 0)
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{
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BIO_copy_next_retry(b);
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return(i);
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}
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OPENSSL_assert(i <= n);
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ctx->buf_off+=i;
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OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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n-=i;
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}
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/* at this point all pending data has been written */
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ctx->buf_off=0;
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ctx->buf_len=0;
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if ((in == NULL) || (inl <= 0)) return(0);
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while (inl > 0)
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{
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n=(inl > B64_BLOCK_SIZE)?B64_BLOCK_SIZE:inl;
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if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
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{
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if (ctx->tmp_len > 0)
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{
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OPENSSL_assert(ctx->tmp_len <= 3);
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n=3-ctx->tmp_len;
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/* There's a theoretical possibility for this */
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if (n > inl)
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n=inl;
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memcpy(&(ctx->tmp[ctx->tmp_len]),in,n);
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ctx->tmp_len+=n;
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ret += n;
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if (ctx->tmp_len < 3)
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break;
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ctx->buf_len=EVP_EncodeBlock((unsigned char *)ctx->buf,(unsigned char *)ctx->tmp,ctx->tmp_len);
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OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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/* Since we're now done using the temporary
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buffer, the length should be 0'd */
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ctx->tmp_len=0;
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}
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else
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{
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if (n < 3)
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{
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memcpy(ctx->tmp,in,n);
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ctx->tmp_len=n;
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ret += n;
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break;
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}
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n-=n%3;
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ctx->buf_len=EVP_EncodeBlock((unsigned char *)ctx->buf,(const unsigned char *)in,n);
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OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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ret += n;
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}
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}
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else
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{
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EVP_EncodeUpdate(&(ctx->base64),
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(unsigned char *)ctx->buf,&ctx->buf_len,
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(unsigned char *)in,n);
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OPENSSL_assert(ctx->buf_len <= (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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ret += n;
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}
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inl-=n;
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in+=n;
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ctx->buf_off=0;
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n=ctx->buf_len;
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while (n > 0)
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{
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i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
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if (i <= 0)
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{
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BIO_copy_next_retry(b);
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return((ret == 0)?i:ret);
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}
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OPENSSL_assert(i <= n);
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n-=i;
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ctx->buf_off+=i;
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OPENSSL_assert(ctx->buf_off <= (int)sizeof(ctx->buf));
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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}
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ctx->buf_len=0;
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ctx->buf_off=0;
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}
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return(ret);
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}
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static long b64_ctrl(BIO *b, int cmd, long num, void *ptr)
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{
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BIO_B64_CTX *ctx;
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long ret=1;
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int i;
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ctx=(BIO_B64_CTX *)b->ptr;
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switch (cmd)
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{
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case BIO_CTRL_RESET:
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ctx->cont=1;
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ctx->start=1;
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ctx->encode=B64_NONE;
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ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
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break;
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case BIO_CTRL_EOF: /* More to read */
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if (ctx->cont <= 0)
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ret=1;
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else
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ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
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break;
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case BIO_CTRL_WPENDING: /* More to write in buffer */
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OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
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ret=ctx->buf_len-ctx->buf_off;
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if ((ret == 0) && (ctx->encode != B64_NONE)
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&& (ctx->base64.num != 0))
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ret=1;
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else if (ret <= 0)
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ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
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break;
|
|
case BIO_CTRL_PENDING: /* More to read in buffer */
|
|
OPENSSL_assert(ctx->buf_len >= ctx->buf_off);
|
|
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=b64_write(b,NULL,0);
|
|
if (i < 0)
|
|
return i;
|
|
}
|
|
if (BIO_get_flags(b) & BIO_FLAGS_BASE64_NO_NL)
|
|
{
|
|
if (ctx->tmp_len != 0)
|
|
{
|
|
ctx->buf_len=EVP_EncodeBlock(
|
|
(unsigned char *)ctx->buf,
|
|
(unsigned char *)ctx->tmp,
|
|
ctx->tmp_len);
|
|
ctx->buf_off=0;
|
|
ctx->tmp_len=0;
|
|
goto again;
|
|
}
|
|
}
|
|
else if (ctx->encode != B64_NONE && ctx->base64.num != 0)
|
|
{
|
|
ctx->buf_off=0;
|
|
EVP_EncodeFinal(&(ctx->base64),
|
|
(unsigned char *)ctx->buf,
|
|
&(ctx->buf_len));
|
|
/* push out the bytes */
|
|
goto again;
|
|
}
|
|
/* Finally flush the underlying BIO */
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
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:
|
|
break;
|
|
case BIO_CTRL_INFO:
|
|
case BIO_CTRL_GET:
|
|
case BIO_CTRL_SET:
|
|
default:
|
|
ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
|
|
break;
|
|
}
|
|
return(ret);
|
|
}
|
|
|
|
static long b64_callback_ctrl(BIO *b, int cmd, bio_info_cb *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);
|
|
}
|
|
|
|
static int b64_puts(BIO *b, const char *str)
|
|
{
|
|
return b64_write(b,str,strlen(str));
|
|
}
|