1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/os/ossrv/ssl/libcrypto/src/crypto/evp/bio_enc.c Fri Jun 15 03:10:57 2012 +0200
1.3 @@ -0,0 +1,451 @@
1.4 +/* crypto/evp/bio_enc.c */
1.5 +/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
1.6 + * All rights reserved.
1.7 + *
1.8 + * This package is an SSL implementation written
1.9 + * by Eric Young (eay@cryptsoft.com).
1.10 + * The implementation was written so as to conform with Netscapes SSL.
1.11 + *
1.12 + * This library is free for commercial and non-commercial use as long as
1.13 + * the following conditions are aheared to. The following conditions
1.14 + * apply to all code found in this distribution, be it the RC4, RSA,
1.15 + * lhash, DES, etc., code; not just the SSL code. The SSL documentation
1.16 + * included with this distribution is covered by the same copyright terms
1.17 + * except that the holder is Tim Hudson (tjh@cryptsoft.com).
1.18 + *
1.19 + * Copyright remains Eric Young's, and as such any Copyright notices in
1.20 + * the code are not to be removed.
1.21 + * If this package is used in a product, Eric Young should be given attribution
1.22 + * as the author of the parts of the library used.
1.23 + * This can be in the form of a textual message at program startup or
1.24 + * in documentation (online or textual) provided with the package.
1.25 + *
1.26 + * Redistribution and use in source and binary forms, with or without
1.27 + * modification, are permitted provided that the following conditions
1.28 + * are met:
1.29 + * 1. Redistributions of source code must retain the copyright
1.30 + * notice, this list of conditions and the following disclaimer.
1.31 + * 2. Redistributions in binary form must reproduce the above copyright
1.32 + * notice, this list of conditions and the following disclaimer in the
1.33 + * documentation and/or other materials provided with the distribution.
1.34 + * 3. All advertising materials mentioning features or use of this software
1.35 + * must display the following acknowledgement:
1.36 + * "This product includes cryptographic software written by
1.37 + * Eric Young (eay@cryptsoft.com)"
1.38 + * The word 'cryptographic' can be left out if the rouines from the library
1.39 + * being used are not cryptographic related :-).
1.40 + * 4. If you include any Windows specific code (or a derivative thereof) from
1.41 + * the apps directory (application code) you must include an acknowledgement:
1.42 + * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
1.43 + *
1.44 + * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
1.45 + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1.46 + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1.47 + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1.48 + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
1.49 + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
1.50 + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
1.51 + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
1.52 + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
1.53 + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
1.54 + * SUCH DAMAGE.
1.55 + *
1.56 + * The licence and distribution terms for any publically available version or
1.57 + * derivative of this code cannot be changed. i.e. this code cannot simply be
1.58 + * copied and put under another distribution licence
1.59 + * [including the GNU Public Licence.]
1.60 + */
1.61 +/*
1.62 + © Portions copyright (c) 2006 Nokia Corporation. All rights reserved.
1.63 + */
1.64 +
1.65 +#include <stdio.h>
1.66 +#include <errno.h>
1.67 +#include "cryptlib.h"
1.68 +#include <openssl/buffer.h>
1.69 +#include <openssl/evp.h>
1.70 +#if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))
1.71 +#include "libcrypto_wsd_macros.h"
1.72 +#include "libcrypto_wsd.h"
1.73 +#endif
1.74 +
1.75 +static int enc_write(BIO *h, const char *buf, int num);
1.76 +static int enc_read(BIO *h, char *buf, int size);
1.77 +/*static int enc_puts(BIO *h, const char *str); */
1.78 +/*static int enc_gets(BIO *h, char *str, int size); */
1.79 +static long enc_ctrl(BIO *h, int cmd, long arg1, void *arg2);
1.80 +static int enc_new(BIO *h);
1.81 +static int enc_free(BIO *data);
1.82 +static long enc_callback_ctrl(BIO *h, int cmd, bio_info_cb *fps);
1.83 +#define ENC_BLOCK_SIZE (1024*4)
1.84 +#define BUF_OFFSET (EVP_MAX_BLOCK_LENGTH*2)
1.85 +
1.86 +typedef struct enc_struct
1.87 + {
1.88 + int buf_len;
1.89 + int buf_off;
1.90 + int cont; /* <= 0 when finished */
1.91 + int finished;
1.92 + int ok; /* bad decrypt */
1.93 + EVP_CIPHER_CTX cipher;
1.94 + /* buf is larger than ENC_BLOCK_SIZE because EVP_DecryptUpdate
1.95 + * can return up to a block more data than is presented to it
1.96 + */
1.97 + char buf[ENC_BLOCK_SIZE+BUF_OFFSET+2];
1.98 + } BIO_ENC_CTX;
1.99 +
1.100 +#ifndef EMULATOR
1.101 +static BIO_METHOD methods_enc=
1.102 + {
1.103 + BIO_TYPE_CIPHER,"cipher",
1.104 + enc_write,
1.105 + enc_read,
1.106 + NULL, /* enc_puts, */
1.107 + NULL, /* enc_gets, */
1.108 + enc_ctrl,
1.109 + enc_new,
1.110 + enc_free,
1.111 + enc_callback_ctrl,
1.112 + };
1.113 +#else
1.114 +GET_STATIC_VAR_FROM_TLS(methods_enc,bio_enc,BIO_METHOD)
1.115 +#define methods_enc (*GET_WSD_VAR_NAME(methods_enc,bio_enc, s)())
1.116 +const BIO_METHOD temp_s_methods_enc=
1.117 + {
1.118 + BIO_TYPE_CIPHER,"cipher",
1.119 + enc_write,
1.120 + enc_read,
1.121 + NULL, /* enc_puts, */
1.122 + NULL, /* enc_gets, */
1.123 + enc_ctrl,
1.124 + enc_new,
1.125 + enc_free,
1.126 + enc_callback_ctrl,
1.127 + };
1.128 +
1.129 +#endif
1.130 +
1.131 +EXPORT_C BIO_METHOD *BIO_f_cipher(void)
1.132 + {
1.133 + return(&methods_enc);
1.134 + }
1.135 +
1.136 +static int enc_new(BIO *bi)
1.137 + {
1.138 + BIO_ENC_CTX *ctx;
1.139 +
1.140 + ctx=(BIO_ENC_CTX *)OPENSSL_malloc(sizeof(BIO_ENC_CTX));
1.141 + if (ctx == NULL) return(0);
1.142 + EVP_CIPHER_CTX_init(&ctx->cipher);
1.143 +
1.144 + ctx->buf_len=0;
1.145 + ctx->buf_off=0;
1.146 + ctx->cont=1;
1.147 + ctx->finished=0;
1.148 + ctx->ok=1;
1.149 +
1.150 + bi->init=0;
1.151 + bi->ptr=(char *)ctx;
1.152 + bi->flags=0;
1.153 + return(1);
1.154 + }
1.155 +
1.156 +static int enc_free(BIO *a)
1.157 + {
1.158 + BIO_ENC_CTX *b;
1.159 +
1.160 + if (a == NULL) return(0);
1.161 + b=(BIO_ENC_CTX *)a->ptr;
1.162 + EVP_CIPHER_CTX_cleanup(&(b->cipher));
1.163 + OPENSSL_cleanse(a->ptr,sizeof(BIO_ENC_CTX));
1.164 + OPENSSL_free(a->ptr);
1.165 + a->ptr=NULL;
1.166 + a->init=0;
1.167 + a->flags=0;
1.168 + return(1);
1.169 + }
1.170 +
1.171 +static int enc_read(BIO *b, char *out, int outl)
1.172 + {
1.173 + int ret=0,i;
1.174 + BIO_ENC_CTX *ctx;
1.175 +
1.176 + if (out == NULL) return(0);
1.177 + ctx=(BIO_ENC_CTX *)b->ptr;
1.178 +
1.179 + if ((ctx == NULL) || (b->next_bio == NULL)) return(0);
1.180 +
1.181 + /* First check if there are bytes decoded/encoded */
1.182 + if (ctx->buf_len > 0)
1.183 + {
1.184 + i=ctx->buf_len-ctx->buf_off;
1.185 + if (i > outl) i=outl;
1.186 + memcpy(out,&(ctx->buf[ctx->buf_off]),i);
1.187 + ret=i;
1.188 + out+=i;
1.189 + outl-=i;
1.190 + ctx->buf_off+=i;
1.191 + if (ctx->buf_len == ctx->buf_off)
1.192 + {
1.193 + ctx->buf_len=0;
1.194 + ctx->buf_off=0;
1.195 + }
1.196 + }
1.197 +
1.198 + /* At this point, we have room of outl bytes and an empty
1.199 + * buffer, so we should read in some more. */
1.200 +
1.201 + while (outl > 0)
1.202 + {
1.203 + if (ctx->cont <= 0) break;
1.204 +
1.205 + /* read in at IV offset, read the EVP_Cipher
1.206 + * documentation about why */
1.207 + i=BIO_read(b->next_bio,&(ctx->buf[BUF_OFFSET]),ENC_BLOCK_SIZE);
1.208 +
1.209 + if (i <= 0)
1.210 + {
1.211 + /* Should be continue next time we are called? */
1.212 + if (!BIO_should_retry(b->next_bio))
1.213 + {
1.214 + ctx->cont=i;
1.215 + i=EVP_CipherFinal_ex(&(ctx->cipher),
1.216 + (unsigned char *)ctx->buf,
1.217 + &(ctx->buf_len));
1.218 + ctx->ok=i;
1.219 + ctx->buf_off=0;
1.220 + }
1.221 + else
1.222 + {
1.223 + ret=(ret == 0)?i:ret;
1.224 + break;
1.225 + }
1.226 + }
1.227 + else
1.228 + {
1.229 + EVP_CipherUpdate(&(ctx->cipher),
1.230 + (unsigned char *)ctx->buf,&ctx->buf_len,
1.231 + (unsigned char *)&(ctx->buf[BUF_OFFSET]),i);
1.232 + ctx->cont=1;
1.233 + /* Note: it is possible for EVP_CipherUpdate to
1.234 + * decrypt zero bytes because this is or looks like
1.235 + * the final block: if this happens we should retry
1.236 + * and either read more data or decrypt the final
1.237 + * block
1.238 + */
1.239 + if(ctx->buf_len == 0) continue;
1.240 + }
1.241 +
1.242 + if (ctx->buf_len <= outl)
1.243 + i=ctx->buf_len;
1.244 + else
1.245 + i=outl;
1.246 + if (i <= 0) break;
1.247 + memcpy(out,ctx->buf,i);
1.248 + ret+=i;
1.249 + ctx->buf_off=i;
1.250 + outl-=i;
1.251 + out+=i;
1.252 + }
1.253 +
1.254 + BIO_clear_retry_flags(b);
1.255 + BIO_copy_next_retry(b);
1.256 + return((ret == 0)?ctx->cont:ret);
1.257 + }
1.258 +
1.259 +static int enc_write(BIO *b, const char *in, int inl)
1.260 + {
1.261 + int ret=0,n,i;
1.262 + BIO_ENC_CTX *ctx;
1.263 +
1.264 + ctx=(BIO_ENC_CTX *)b->ptr;
1.265 + ret=inl;
1.266 +
1.267 + BIO_clear_retry_flags(b);
1.268 + n=ctx->buf_len-ctx->buf_off;
1.269 + while (n > 0)
1.270 + {
1.271 + i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
1.272 + if (i <= 0)
1.273 + {
1.274 + BIO_copy_next_retry(b);
1.275 + return(i);
1.276 + }
1.277 + ctx->buf_off+=i;
1.278 + n-=i;
1.279 + }
1.280 + /* at this point all pending data has been written */
1.281 +
1.282 + if ((in == NULL) || (inl <= 0)) return(0);
1.283 +
1.284 + ctx->buf_off=0;
1.285 + while (inl > 0)
1.286 + {
1.287 + n=(inl > ENC_BLOCK_SIZE)?ENC_BLOCK_SIZE:inl;
1.288 + EVP_CipherUpdate(&(ctx->cipher),
1.289 + (unsigned char *)ctx->buf,&ctx->buf_len,
1.290 + (unsigned char *)in,n);
1.291 + inl-=n;
1.292 + in+=n;
1.293 +
1.294 + ctx->buf_off=0;
1.295 + n=ctx->buf_len;
1.296 + while (n > 0)
1.297 + {
1.298 + i=BIO_write(b->next_bio,&(ctx->buf[ctx->buf_off]),n);
1.299 + if (i <= 0)
1.300 + {
1.301 + BIO_copy_next_retry(b);
1.302 + return (ret == inl) ? i : ret - inl;
1.303 + }
1.304 + n-=i;
1.305 + ctx->buf_off+=i;
1.306 + }
1.307 + ctx->buf_len=0;
1.308 + ctx->buf_off=0;
1.309 + }
1.310 + BIO_copy_next_retry(b);
1.311 + return(ret);
1.312 + }
1.313 +
1.314 +static long enc_ctrl(BIO *b, int cmd, long num, void *ptr)
1.315 + {
1.316 + BIO *dbio;
1.317 + BIO_ENC_CTX *ctx,*dctx;
1.318 + long ret=1;
1.319 + int i;
1.320 + EVP_CIPHER_CTX **c_ctx;
1.321 +
1.322 + ctx=(BIO_ENC_CTX *)b->ptr;
1.323 +
1.324 + switch (cmd)
1.325 + {
1.326 + case BIO_CTRL_RESET:
1.327 + ctx->ok=1;
1.328 + ctx->finished=0;
1.329 + EVP_CipherInit_ex(&(ctx->cipher),NULL,NULL,NULL,NULL,
1.330 + ctx->cipher.encrypt);
1.331 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.332 + break;
1.333 + case BIO_CTRL_EOF: /* More to read */
1.334 + if (ctx->cont <= 0)
1.335 + ret=1;
1.336 + else
1.337 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.338 + break;
1.339 + case BIO_CTRL_WPENDING:
1.340 + ret=ctx->buf_len-ctx->buf_off;
1.341 + if (ret <= 0)
1.342 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.343 + break;
1.344 + case BIO_CTRL_PENDING: /* More to read in buffer */
1.345 + ret=ctx->buf_len-ctx->buf_off;
1.346 + if (ret <= 0)
1.347 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.348 + break;
1.349 + case BIO_CTRL_FLUSH:
1.350 + /* do a final write */
1.351 +again:
1.352 + while (ctx->buf_len != ctx->buf_off)
1.353 + {
1.354 + i=enc_write(b,NULL,0);
1.355 + if (i < 0)
1.356 + return i;
1.357 + }
1.358 +
1.359 + if (!ctx->finished)
1.360 + {
1.361 + ctx->finished=1;
1.362 + ctx->buf_off=0;
1.363 + ret=EVP_CipherFinal_ex(&(ctx->cipher),
1.364 + (unsigned char *)ctx->buf,
1.365 + &(ctx->buf_len));
1.366 + ctx->ok=(int)ret;
1.367 + if (ret <= 0) break;
1.368 +
1.369 + /* push out the bytes */
1.370 + goto again;
1.371 + }
1.372 +
1.373 + /* Finally flush the underlying BIO */
1.374 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.375 + break;
1.376 + case BIO_C_GET_CIPHER_STATUS:
1.377 + ret=(long)ctx->ok;
1.378 + break;
1.379 + case BIO_C_DO_STATE_MACHINE:
1.380 + BIO_clear_retry_flags(b);
1.381 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.382 + BIO_copy_next_retry(b);
1.383 + break;
1.384 + case BIO_C_GET_CIPHER_CTX:
1.385 + c_ctx=(EVP_CIPHER_CTX **)ptr;
1.386 + (*c_ctx)= &(ctx->cipher);
1.387 + b->init=1;
1.388 + break;
1.389 + case BIO_CTRL_DUP:
1.390 + dbio=(BIO *)ptr;
1.391 + dctx=(BIO_ENC_CTX *)dbio->ptr;
1.392 + memcpy(&(dctx->cipher),&(ctx->cipher),sizeof(ctx->cipher));
1.393 + dbio->init=1;
1.394 + break;
1.395 + default:
1.396 + ret=BIO_ctrl(b->next_bio,cmd,num,ptr);
1.397 + break;
1.398 + }
1.399 + return(ret);
1.400 + }
1.401 +
1.402 +static long enc_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp)
1.403 + {
1.404 + long ret=1;
1.405 +
1.406 + if (b->next_bio == NULL) return(0);
1.407 + switch (cmd)
1.408 + {
1.409 + default:
1.410 + ret=BIO_callback_ctrl(b->next_bio,cmd,fp);
1.411 + break;
1.412 + }
1.413 + return(ret);
1.414 + }
1.415 +
1.416 +/*
1.417 +void BIO_set_cipher_ctx(b,c)
1.418 +BIO *b;
1.419 +EVP_CIPHER_ctx *c;
1.420 + {
1.421 + if (b == NULL) return;
1.422 +
1.423 + if ((b->callback != NULL) &&
1.424 + (b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,0L) <= 0))
1.425 + return;
1.426 +
1.427 + b->init=1;
1.428 + ctx=(BIO_ENC_CTX *)b->ptr;
1.429 + memcpy(ctx->cipher,c,sizeof(EVP_CIPHER_CTX));
1.430 +
1.431 + if (b->callback != NULL)
1.432 + b->callback(b,BIO_CB_CTRL,(char *)c,BIO_CTRL_SET,e,1L);
1.433 + }
1.434 +*/
1.435 +
1.436 +EXPORT_C void BIO_set_cipher(BIO *b, const EVP_CIPHER *c, const unsigned char *k,
1.437 + const unsigned char *i, int e)
1.438 + {
1.439 + BIO_ENC_CTX *ctx;
1.440 +
1.441 + if (b == NULL) return;
1.442 +
1.443 + if ((b->callback != NULL) &&
1.444 + (b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,0L) <= 0))
1.445 + return;
1.446 +
1.447 + b->init=1;
1.448 + ctx=(BIO_ENC_CTX *)b->ptr;
1.449 + EVP_CipherInit_ex(&(ctx->cipher),c,NULL, k,i,e);
1.450 +
1.451 + if (b->callback != NULL)
1.452 + b->callback(b,BIO_CB_CTRL,(const char *)c,BIO_CTRL_SET,e,1L);
1.453 + }
1.454 +