+++ /dev/null
-/* $OpenBSD: bf_lbuf.c,v 1.15 2022/01/14 08:40:57 tb Exp $ */
-/* 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 <errno.h>
-#include <stdio.h>
-
-#include <openssl/bio.h>
-#include <openssl/evp.h>
-
-static int linebuffer_write(BIO *h, const char *buf, int num);
-static int linebuffer_read(BIO *h, char *buf, int size);
-static int linebuffer_puts(BIO *h, const char *str);
-static int linebuffer_gets(BIO *h, char *str, int size);
-static long linebuffer_ctrl(BIO *h, int cmd, long arg1, void *arg2);
-static int linebuffer_new(BIO *h);
-static int linebuffer_free(BIO *data);
-static long linebuffer_callback_ctrl(BIO *h, int cmd, BIO_info_cb *fp);
-
-/* A 10k maximum should be enough for most purposes */
-#define DEFAULT_LINEBUFFER_SIZE 1024*10
-
-/* #define DEBUG */
-
-static BIO_METHOD methods_linebuffer = {
- .type = BIO_TYPE_LINEBUFFER,
- .name = "linebuffer",
- .bwrite = linebuffer_write,
- .bread = linebuffer_read,
- .bputs = linebuffer_puts,
- .bgets = linebuffer_gets,
- .ctrl = linebuffer_ctrl,
- .create = linebuffer_new,
- .destroy = linebuffer_free,
- .callback_ctrl = linebuffer_callback_ctrl
-};
-
-BIO_METHOD *
-BIO_f_linebuffer(void)
-{
- return (&methods_linebuffer);
-}
-
-typedef struct bio_linebuffer_ctx_struct {
- char *obuf; /* the output char array */
- int obuf_size; /* how big is the output buffer */
- int obuf_len; /* how many bytes are in it */
-} BIO_LINEBUFFER_CTX;
-
-static int
-linebuffer_new(BIO *bi)
-{
- BIO_LINEBUFFER_CTX *ctx;
-
- ctx = malloc(sizeof(BIO_LINEBUFFER_CTX));
- if (ctx == NULL)
- return (0);
- ctx->obuf = malloc(DEFAULT_LINEBUFFER_SIZE);
- if (ctx->obuf == NULL) {
- free(ctx);
- return (0);
- }
- ctx->obuf_size = DEFAULT_LINEBUFFER_SIZE;
- ctx->obuf_len = 0;
-
- bi->init = 1;
- bi->ptr = (char *)ctx;
- bi->flags = 0;
- return (1);
-}
-
-static int
-linebuffer_free(BIO *a)
-{
- BIO_LINEBUFFER_CTX *b;
-
- if (a == NULL)
- return (0);
- b = (BIO_LINEBUFFER_CTX *)a->ptr;
- free(b->obuf);
- free(a->ptr);
- a->ptr = NULL;
- a->init = 0;
- a->flags = 0;
- return (1);
-}
-
-static int
-linebuffer_read(BIO *b, char *out, int outl)
-{
- int ret = 0;
-
- if (out == NULL)
- return (0);
- if (b->next_bio == NULL)
- return (0);
- ret = BIO_read(b->next_bio, out, outl);
- BIO_clear_retry_flags(b);
- BIO_copy_next_retry(b);
- return (ret);
-}
-
-static int
-linebuffer_write(BIO *b, const char *in, int inl)
-{
- int i, num = 0, foundnl;
- BIO_LINEBUFFER_CTX *ctx;
-
- if ((in == NULL) || (inl <= 0))
- return (0);
- ctx = (BIO_LINEBUFFER_CTX *)b->ptr;
- if ((ctx == NULL) || (b->next_bio == NULL))
- return (0);
-
- BIO_clear_retry_flags(b);
-
- do {
- const char *p;
-
- for (p = in; p < in + inl && *p != '\n'; p++)
- ;
- if (*p == '\n') {
- p++;
- foundnl = 1;
- } else
- foundnl = 0;
-
- /* If a NL was found and we already have text in the save
- buffer, concatenate them and write */
- while ((foundnl || p - in > ctx->obuf_size - ctx->obuf_len) &&
- ctx->obuf_len > 0) {
- int orig_olen = ctx->obuf_len;
-
- i = ctx->obuf_size - ctx->obuf_len;
- if (p - in > 0) {
- if (i >= p - in) {
- memcpy(&(ctx->obuf[ctx->obuf_len]),
- in, p - in);
- ctx->obuf_len += p - in;
- inl -= p - in;
- num += p - in;
- in = p;
- } else {
- memcpy(&(ctx->obuf[ctx->obuf_len]),
- in, i);
- ctx->obuf_len += i;
- inl -= i;
- in += i;
- num += i;
- }
- }
-
- i = BIO_write(b->next_bio, ctx->obuf, ctx->obuf_len);
- if (i <= 0) {
- ctx->obuf_len = orig_olen;
- BIO_copy_next_retry(b);
- if (i < 0)
- return ((num > 0) ? num : i);
- if (i == 0)
- return (num);
- }
- if (i < ctx->obuf_len)
- memmove(ctx->obuf, ctx->obuf + i,
- ctx->obuf_len - i);
- ctx->obuf_len -= i;
- }
-
- /* Now that the save buffer is emptied, let's write the input
- buffer if a NL was found and there is anything to write. */
- if ((foundnl || p - in > ctx->obuf_size) && p - in > 0) {
- i = BIO_write(b->next_bio, in, p - in);
- if (i <= 0) {
- BIO_copy_next_retry(b);
- if (i < 0)
- return ((num > 0) ? num : i);
- if (i == 0)
- return (num);
- }
- num += i;
- in += i;
- inl -= i;
- }
- } while (foundnl && inl > 0);
- /* We've written as much as we can. The rest of the input buffer, if
- any, is text that doesn't and with a NL and therefore needs to be
- saved for the next trip. */
- if (inl > 0) {
- memcpy(&(ctx->obuf[ctx->obuf_len]), in, inl);
- ctx->obuf_len += inl;
- num += inl;
- }
- return num;
-}
-
-static long
-linebuffer_ctrl(BIO *b, int cmd, long num, void *ptr)
-{
- BIO *dbio;
- BIO_LINEBUFFER_CTX *ctx;
- long ret = 1;
- char *p;
- int r;
- int obs;
-
- ctx = (BIO_LINEBUFFER_CTX *)b->ptr;
-
- switch (cmd) {
- case BIO_CTRL_RESET:
- ctx->obuf_len = 0;
- if (b->next_bio == NULL)
- return (0);
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- break;
- case BIO_CTRL_INFO:
- ret = (long)ctx->obuf_len;
- break;
- case BIO_CTRL_WPENDING:
- ret = (long)ctx->obuf_len;
- if (ret == 0) {
- if (b->next_bio == NULL)
- return (0);
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- }
- break;
- case BIO_C_SET_BUFF_SIZE:
- obs = (int)num;
- p = ctx->obuf;
- if ((obs > DEFAULT_LINEBUFFER_SIZE) && (obs != ctx->obuf_size)) {
- p = malloc(num);
- if (p == NULL)
- goto malloc_error;
- }
- if (ctx->obuf != p) {
- if (ctx->obuf_len > obs) {
- ctx->obuf_len = obs;
- }
- memcpy(p, ctx->obuf, ctx->obuf_len);
- free(ctx->obuf);
- ctx->obuf = p;
- ctx->obuf_size = obs;
- }
- break;
- case BIO_C_DO_STATE_MACHINE:
- if (b->next_bio == NULL)
- return (0);
- BIO_clear_retry_flags(b);
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- BIO_copy_next_retry(b);
- break;
-
- case BIO_CTRL_FLUSH:
- if (b->next_bio == NULL)
- return (0);
- if (ctx->obuf_len <= 0) {
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- break;
- }
-
- for (;;) {
- BIO_clear_retry_flags(b);
- if (ctx->obuf_len > 0) {
- r = BIO_write(b->next_bio,
- ctx->obuf, ctx->obuf_len);
- BIO_copy_next_retry(b);
- if (r <= 0)
- return ((long)r);
- if (r < ctx->obuf_len)
- memmove(ctx->obuf, ctx->obuf + r,
- ctx->obuf_len - r);
- ctx->obuf_len -= r;
- } else {
- ctx->obuf_len = 0;
- ret = 1;
- break;
- }
- }
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- break;
- case BIO_CTRL_DUP:
- dbio = (BIO *)ptr;
- if (!BIO_set_write_buffer_size(dbio, ctx->obuf_size))
- ret = 0;
- break;
- default:
- if (b->next_bio == NULL)
- return (0);
- ret = BIO_ctrl(b->next_bio, cmd, num, ptr);
- break;
- }
- return (ret);
-malloc_error:
- BIOerror(ERR_R_MALLOC_FAILURE);
- return (0);
-}
-
-static long
-linebuffer_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
-linebuffer_gets(BIO *b, char *buf, int size)
-{
- if (b->next_bio == NULL)
- return (0);
- return (BIO_gets(b->next_bio, buf, size));
-}
-
-static int
-linebuffer_puts(BIO *b, const char *str)
-{
- return (linebuffer_write(b, str, strlen(str)));
-}
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