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391 lines
12 KiB
391 lines
12 KiB
/* crypto/bio/bf_buff.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/bio.h> |
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#include <openssl/evp.h> |
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static int linebuffer_write(BIO *h, const char *buf, int num); |
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static int linebuffer_read(BIO *h, char *buf, int size); |
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static int linebuffer_puts(BIO *h, const char *str); |
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static int linebuffer_gets(BIO *h, char *str, int size); |
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static long linebuffer_ctrl(BIO *h, int cmd, long arg1, void *arg2); |
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static int linebuffer_new(BIO *h); |
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static int linebuffer_free(BIO *data); |
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static long linebuffer_callback_ctrl(BIO *h, int cmd, bio_info_cb *fp); |
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/* A 10k maximum should be enough for most purposes */ |
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#define DEFAULT_LINEBUFFER_SIZE 1024*10 |
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/* #define DEBUG */ |
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static BIO_METHOD methods_linebuffer = { |
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BIO_TYPE_LINEBUFFER, |
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"linebuffer", |
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linebuffer_write, |
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linebuffer_read, |
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linebuffer_puts, |
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linebuffer_gets, |
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linebuffer_ctrl, |
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linebuffer_new, |
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linebuffer_free, |
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linebuffer_callback_ctrl, |
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}; |
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BIO_METHOD *BIO_f_linebuffer(void) |
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{ |
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return (&methods_linebuffer); |
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} |
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typedef struct bio_linebuffer_ctx_struct { |
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char *obuf; /* the output char array */ |
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int obuf_size; /* how big is the output buffer */ |
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int obuf_len; /* how many bytes are in it */ |
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} BIO_LINEBUFFER_CTX; |
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static int linebuffer_new(BIO *bi) |
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{ |
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BIO_LINEBUFFER_CTX *ctx; |
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ctx = (BIO_LINEBUFFER_CTX *)OPENSSL_malloc(sizeof(BIO_LINEBUFFER_CTX)); |
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if (ctx == NULL) |
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return (0); |
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ctx->obuf = (char *)OPENSSL_malloc(DEFAULT_LINEBUFFER_SIZE); |
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if (ctx->obuf == NULL) { |
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OPENSSL_free(ctx); |
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return (0); |
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} |
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ctx->obuf_size = DEFAULT_LINEBUFFER_SIZE; |
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ctx->obuf_len = 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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return (1); |
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} |
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static int linebuffer_free(BIO *a) |
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{ |
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BIO_LINEBUFFER_CTX *b; |
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if (a == NULL) |
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return (0); |
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b = (BIO_LINEBUFFER_CTX *)a->ptr; |
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if (b->obuf != NULL) |
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OPENSSL_free(b->obuf); |
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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 linebuffer_read(BIO *b, char *out, int outl) |
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{ |
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int ret = 0; |
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if (out == NULL) |
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return (0); |
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if (b->next_bio == NULL) |
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return (0); |
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ret = BIO_read(b->next_bio, out, outl); |
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BIO_clear_retry_flags(b); |
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BIO_copy_next_retry(b); |
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return (ret); |
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} |
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static int linebuffer_write(BIO *b, const char *in, int inl) |
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{ |
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int i, num = 0, foundnl; |
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BIO_LINEBUFFER_CTX *ctx; |
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if ((in == NULL) || (inl <= 0)) |
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return (0); |
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ctx = (BIO_LINEBUFFER_CTX *)b->ptr; |
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if ((ctx == NULL) || (b->next_bio == NULL)) |
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return (0); |
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BIO_clear_retry_flags(b); |
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do { |
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const char *p; |
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for (p = in; p < in + inl && *p != '\n'; p++) ; |
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if (*p == '\n') { |
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p++; |
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foundnl = 1; |
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} else |
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foundnl = 0; |
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/* |
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* If a NL was found and we already have text in the save buffer, |
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* concatenate them and write |
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*/ |
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while ((foundnl || p - in > ctx->obuf_size - ctx->obuf_len) |
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&& ctx->obuf_len > 0) { |
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int orig_olen = ctx->obuf_len; |
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i = ctx->obuf_size - ctx->obuf_len; |
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if (p - in > 0) { |
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if (i >= p - in) { |
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memcpy(&(ctx->obuf[ctx->obuf_len]), in, p - in); |
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ctx->obuf_len += p - in; |
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inl -= p - in; |
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num += p - in; |
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in = p; |
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} else { |
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memcpy(&(ctx->obuf[ctx->obuf_len]), in, i); |
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ctx->obuf_len += i; |
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inl -= i; |
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in += i; |
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num += i; |
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} |
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} |
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#if 0 |
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BIO_write(b->next_bio, "<*<", 3); |
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#endif |
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i = BIO_write(b->next_bio, ctx->obuf, ctx->obuf_len); |
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if (i <= 0) { |
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ctx->obuf_len = orig_olen; |
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BIO_copy_next_retry(b); |
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#if 0 |
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BIO_write(b->next_bio, ">*>", 3); |
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#endif |
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if (i < 0) |
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return ((num > 0) ? num : i); |
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if (i == 0) |
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return (num); |
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} |
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#if 0 |
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BIO_write(b->next_bio, ">*>", 3); |
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#endif |
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if (i < ctx->obuf_len) |
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memmove(ctx->obuf, ctx->obuf + i, ctx->obuf_len - i); |
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ctx->obuf_len -= i; |
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} |
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/* |
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* Now that the save buffer is emptied, let's write the input buffer |
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* if a NL was found and there is anything to write. |
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*/ |
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if ((foundnl || p - in > ctx->obuf_size) && p - in > 0) { |
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#if 0 |
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BIO_write(b->next_bio, "<*<", 3); |
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#endif |
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i = BIO_write(b->next_bio, in, p - in); |
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if (i <= 0) { |
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BIO_copy_next_retry(b); |
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#if 0 |
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BIO_write(b->next_bio, ">*>", 3); |
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#endif |
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if (i < 0) |
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return ((num > 0) ? num : i); |
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if (i == 0) |
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return (num); |
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} |
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#if 0 |
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BIO_write(b->next_bio, ">*>", 3); |
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#endif |
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num += i; |
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in += i; |
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inl -= i; |
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} |
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} |
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while (foundnl && inl > 0); |
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/* |
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* We've written as much as we can. The rest of the input buffer, if |
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* any, is text that doesn't and with a NL and therefore needs to be |
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* saved for the next trip. |
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*/ |
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if (inl > 0) { |
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memcpy(&(ctx->obuf[ctx->obuf_len]), in, inl); |
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ctx->obuf_len += inl; |
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num += inl; |
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} |
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return num; |
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} |
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static long linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr) |
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{ |
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BIO *dbio; |
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BIO_LINEBUFFER_CTX *ctx; |
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long ret = 1; |
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char *p; |
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int r; |
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int obs; |
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ctx = (BIO_LINEBUFFER_CTX *)b->ptr; |
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switch (cmd) { |
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case BIO_CTRL_RESET: |
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ctx->obuf_len = 0; |
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if (b->next_bio == NULL) |
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return (0); |
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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_INFO: |
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ret = (long)ctx->obuf_len; |
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break; |
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case BIO_CTRL_WPENDING: |
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ret = (long)ctx->obuf_len; |
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if (ret == 0) { |
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if (b->next_bio == NULL) |
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return (0); |
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
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} |
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break; |
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case BIO_C_SET_BUFF_SIZE: |
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obs = (int)num; |
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p = ctx->obuf; |
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if ((obs > DEFAULT_LINEBUFFER_SIZE) && (obs != ctx->obuf_size)) { |
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p = (char *)OPENSSL_malloc((int)num); |
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if (p == NULL) |
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goto malloc_error; |
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} |
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if (ctx->obuf != p) { |
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if (ctx->obuf_len > obs) { |
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ctx->obuf_len = obs; |
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} |
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memcpy(p, ctx->obuf, ctx->obuf_len); |
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OPENSSL_free(ctx->obuf); |
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ctx->obuf = p; |
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ctx->obuf_size = obs; |
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} |
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break; |
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case BIO_C_DO_STATE_MACHINE: |
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if (b->next_bio == NULL) |
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return (0); |
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BIO_clear_retry_flags(b); |
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
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BIO_copy_next_retry(b); |
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break; |
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case BIO_CTRL_FLUSH: |
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if (b->next_bio == NULL) |
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return (0); |
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if (ctx->obuf_len <= 0) { |
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
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break; |
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} |
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for (;;) { |
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BIO_clear_retry_flags(b); |
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if (ctx->obuf_len > 0) { |
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r = BIO_write(b->next_bio, ctx->obuf, ctx->obuf_len); |
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#if 0 |
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fprintf(stderr, "FLUSH %3d -> %3d\n", ctx->obuf_len, r); |
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#endif |
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BIO_copy_next_retry(b); |
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if (r <= 0) |
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return ((long)r); |
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if (r < ctx->obuf_len) |
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memmove(ctx->obuf, ctx->obuf + r, ctx->obuf_len - r); |
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ctx->obuf_len -= r; |
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} else { |
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ctx->obuf_len = 0; |
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ret = 1; |
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break; |
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} |
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} |
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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_DUP: |
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dbio = (BIO *)ptr; |
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if (!BIO_set_write_buffer_size(dbio, ctx->obuf_size)) |
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ret = 0; |
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break; |
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default: |
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if (b->next_bio == NULL) |
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return (0); |
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ret = BIO_ctrl(b->next_bio, cmd, num, ptr); |
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break; |
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} |
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return (ret); |
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malloc_error: |
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BIOerr(BIO_F_LINEBUFFER_CTRL, ERR_R_MALLOC_FAILURE); |
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return (0); |
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} |
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static long linebuffer_callback_ctrl(BIO *b, int cmd, bio_info_cb *fp) |
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{ |
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long ret = 1; |
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if (b->next_bio == NULL) |
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return (0); |
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switch (cmd) { |
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default: |
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ret = BIO_callback_ctrl(b->next_bio, cmd, fp); |
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break; |
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} |
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return (ret); |
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} |
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static int linebuffer_gets(BIO *b, char *buf, int size) |
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{ |
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if (b->next_bio == NULL) |
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return (0); |
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return (BIO_gets(b->next_bio, buf, size)); |
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} |
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static int linebuffer_puts(BIO *b, const char *str) |
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{ |
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return (linebuffer_write(b, str, strlen(str))); |
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}
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