chasing indexing error

1 files changed, 0 insertions, 170 deletions

diff --git a/ffmpeg/libavformat/crypto.c b/ffmpeg/libavformat/crypto.c
deleted file mode 100644
index a9b6e47..0000000
--- a/ffmpeg/libavformat/crypto.c
+++ /dev/null
@@ -1,170 +0,0 @@
-/*
- * Decryption protocol handler
- * Copyright (c) 2011 Martin Storsjo
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include "avformat.h"
-#include "libavutil/aes.h"
-#include "libavutil/avstring.h"
-#include "libavutil/opt.h"
-#include "internal.h"
-#include "url.h"
-
-#define MAX_BUFFER_BLOCKS 150
-#define BLOCKSIZE 16
-
-typedef struct {
-    const AVClass *class;
-    URLContext *hd;
-    uint8_t inbuffer [BLOCKSIZE*MAX_BUFFER_BLOCKS],
-            outbuffer[BLOCKSIZE*MAX_BUFFER_BLOCKS];
-    uint8_t *outptr;
-    int indata, indata_used, outdata;
-    int eof;
-    uint8_t *key;
-    int keylen;
-    uint8_t *iv;
-    int ivlen;
-    struct AVAES *aes;
-} CryptoContext;
-
-#define OFFSET(x) offsetof(CryptoContext, x)
-#define D AV_OPT_FLAG_DECODING_PARAM
-static const AVOption options[] = {
-    {"key", "AES decryption key", OFFSET(key), AV_OPT_TYPE_BINARY, .flags = D },
-    {"iv",  "AES decryption initialization vector", OFFSET(iv), AV_OPT_TYPE_BINARY, .flags = D },
-    { NULL }
-};
-
-static const AVClass crypto_class = {
-    .class_name     = "crypto",
-    .item_name      = av_default_item_name,
-    .option         = options,
-    .version        = LIBAVUTIL_VERSION_INT,
-};
-
-static int crypto_open2(URLContext *h, const char *uri, int flags, AVDictionary **options)
-{
-    const char *nested_url;
-    int ret = 0;
-    CryptoContext *c = h->priv_data;
-
-    if (!av_strstart(uri, "crypto+", &nested_url) &&
-        !av_strstart(uri, "crypto:", &nested_url)) {
-        av_log(h, AV_LOG_ERROR, "Unsupported url %s\n", uri);
-        ret = AVERROR(EINVAL);
-        goto err;
-    }
-
-    if (c->keylen < BLOCKSIZE || c->ivlen < BLOCKSIZE) {
-        av_log(h, AV_LOG_ERROR, "Key or IV not set\n");
-        ret = AVERROR(EINVAL);
-        goto err;
-    }
-    if (flags & AVIO_FLAG_WRITE) {
-        av_log(h, AV_LOG_ERROR, "Only decryption is supported currently\n");
-        ret = AVERROR(ENOSYS);
-        goto err;
-    }
-    if ((ret = ffurl_open(&c->hd, nested_url, AVIO_FLAG_READ,
-                          &h->interrupt_callback, options)) < 0) {
-        av_log(h, AV_LOG_ERROR, "Unable to open input\n");
-        goto err;
-    }
-    c->aes = av_aes_alloc();
-    if (!c->aes) {
-        ret = AVERROR(ENOMEM);
-        goto err;
-    }
-
-    av_aes_init(c->aes, c->key, 128, 1);
-
-    h->is_streamed = 1;
-
-err:
-    return ret;
-}
-
-static int crypto_read(URLContext *h, uint8_t *buf, int size)
-{
-    CryptoContext *c = h->priv_data;
-    int blocks;
-retry:
-    if (c->outdata > 0) {
-        size = FFMIN(size, c->outdata);
-        memcpy(buf, c->outptr, size);
-        c->outptr  += size;
-        c->outdata -= size;
-        return size;
-    }
-    // We avoid using the last block until we've found EOF,
-    // since we'll remove PKCS7 padding at the end. So make
-    // sure we've got at least 2 blocks, so we can decrypt
-    // at least one.
-    while (c->indata - c->indata_used < 2*BLOCKSIZE) {
-        int n = ffurl_read(c->hd, c->inbuffer + c->indata,
-                           sizeof(c->inbuffer) - c->indata);
-        if (n <= 0) {
-            c->eof = 1;
-            break;
-        }
-        c->indata += n;
-    }
-    blocks = (c->indata - c->indata_used) / BLOCKSIZE;
-    if (!blocks)
-        return AVERROR_EOF;
-    if (!c->eof)
-        blocks--;
-    av_aes_crypt(c->aes, c->outbuffer, c->inbuffer + c->indata_used, blocks,
-                 c->iv, 1);
-    c->outdata      = BLOCKSIZE * blocks;
-    c->outptr       = c->outbuffer;
-    c->indata_used += BLOCKSIZE * blocks;
-    if (c->indata_used >= sizeof(c->inbuffer)/2) {
-        memmove(c->inbuffer, c->inbuffer + c->indata_used,
-                c->indata - c->indata_used);
-        c->indata     -= c->indata_used;
-        c->indata_used = 0;
-    }
-    if (c->eof) {
-        // Remove PKCS7 padding at the end
-        int padding = c->outbuffer[c->outdata - 1];
-        c->outdata -= padding;
-    }
-    goto retry;
-}
-
-static int crypto_close(URLContext *h)
-{
-    CryptoContext *c = h->priv_data;
-    if (c->hd)
-        ffurl_close(c->hd);
-    av_freep(&c->aes);
-    return 0;
-}
-
-URLProtocol ff_crypto_protocol = {
-    .name            = "crypto",
-    .url_open2       = crypto_open2,
-    .url_read        = crypto_read,
-    .url_close       = crypto_close,
-    .priv_data_size  = sizeof(CryptoContext),
-    .priv_data_class = &crypto_class,
-    .flags           = URL_PROTOCOL_FLAG_NESTED_SCHEME,
-};