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Changes of Revision 2

ffmpeg-support-kid-key.patch Added

@@ -0,0 +1,454 @@
+--- a/doc/demuxers.texi
++++ b/doc/demuxers.texi
+@@ -281,7 +281,11 @@
+ @table @option
+ 
+ @item cenc_decryption_key
+-16-byte key, in hex, to decrypt files encrypted using ISO Common Encryption (CENC/AES-128 CTR; ISO/IEC 23001-7).
++Default 16-byte key, in hex, to decrypt files encrypted using ISO Common Encryption (CENC/AES-128 CTR; ISO/IEC 23001-7).
++
++ at item cenc_decryption_keys
++Dictionary of 16-byte key ID => 16-byte key, both in hex, to decrypt files encrypted using ISO Common Encryption
++(CENC/AES-128 CTR; ISO/IEC 23001-7).
+ 
+ @end table
+ 
+@@ -931,7 +935,11 @@
+ specify.
+ 
+ @item decryption_key
+-16-byte key, in hex, to decrypt files encrypted using ISO Common Encryption (CENC/AES-128 CTR; ISO/IEC 23001-7).
++Default 16-byte key, in hex, to decrypt files encrypted using ISO Common Encryption (CENC/AES-128 CTR; ISO/IEC 23001-7).
++
++ at item decryption_keys
++Dictionary of 16-byte key ID => 16-byte key, both in hex, to decrypt files encrypted using ISO Common Encryption
++(CENC/AES-128 CTR; ISO/IEC 23001-7).
+ 
+ @item max_stts_delta
+ Very high sample deltas written in a trak's stts box may occasionally be intended but usually they are written in
+--- a/libavformat/dashdec.c
++++ b/libavformat/dashdec.c
+@@ -153,6 +153,7 @@
+     AVDictionary *avio_opts;
+     int max_url_size;
+     char *cenc_decryption_key;
++    char *cenc_decryption_keys;
+ 
+     /* Flags for init section*/
+     int is_init_section_common_video;
+@@ -1906,6 +1907,8 @@
+ 
+     if (c->cenc_decryption_key)
+         av_dict_set(&in_fmt_opts, "decryption_key", c->cenc_decryption_key, 0);
++    if (c->cenc_decryption_keys)
++        av_dict_set(&in_fmt_opts, "decryption_keys", c->cenc_decryption_keys, 0);
+ 
+     // provide additional information from mpd if available
+     ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url
+@@ -2347,7 +2350,8 @@
+         OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
+         {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
+         INT_MIN, INT_MAX, FLAGS},
+-    { "cenc_decryption_key", "Media decryption key (hex)", OFFSET(cenc_decryption_key), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
++    { "cenc_decryption_key", "Media default decryption key (hex)", OFFSET(cenc_decryption_key), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
++    { "cenc_decryption_keys", "Media decryption keys by KID (hex)", OFFSET(cenc_decryption_keys), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
+     {NULL}
+ };
+ 
+--- a/libavformat/isom.h
++++ b/libavformat/isom.h
+@@ -340,8 +340,8 @@
+     void *audible_iv;
+     int audible_iv_size;
+     struct AVAES *aes_decrypt;
+-    uint8_t *decryption_key;
+-    int decryption_key_len;
++    uint8_t *decryption_default_key;
++    int decryption_default_key_len;
+     int enable_drefs;
+     int32_t movie_display_matrix33; ///< display matrix from mvhd
+     int have_read_mfra_size;
+@@ -356,6 +356,7 @@
+     int thmb_item_id;
+     int64_t idat_offset;
+     int interleaved_read;
++    AVDictionary* decryption_keys;
+ } MOVContext;
+ 
+ int ff_mp4_read_descr_len(AVIOContext *pb);
+--- a/libavformat/mov.c
++++ b/libavformat/mov.c
+@@ -7414,19 +7414,62 @@
+     return 0;
+ }
+ 
++static int get_key_from_kid(uint8_t* out, int len, MOVContext *c, AVEncryptionInfo *sample) {
++    AVDictionaryEntry *key_entry_hex;
++    char kid_hex16*2+1;
++
++    if (c->decryption_default_key && c->decryption_default_key_len != len) {
++        av_log(c->fc, AV_LOG_ERROR, "invalid default decryption key length: got %d, expected %d\n", c->decryption_default_key_len, len);
++        return -1;
++    }
++
++    if (!c->decryption_keys) {
++        av_assert0(c->decryption_default_key);
++        memcpy(out, c->decryption_default_key, len);
++        return 0;
++    }
++
++    if (sample->key_id_size != 16) {
++        av_log(c->fc, AV_LOG_ERROR, "invalid key ID size: got %u, expected 16\n", sample->key_id_size);
++        return -1;
++    }
++
++    ff_data_to_hex(kid_hex, sample->key_id, 16, 1);
++    key_entry_hex = av_dict_get(c->decryption_keys, kid_hex, NULL, AV_DICT_DONT_STRDUP_KEY|AV_DICT_DONT_STRDUP_VAL);
++    if (!key_entry_hex) {
++        if (!c->decryption_default_key) {
++            av_log(c->fc, AV_LOG_ERROR, "unable to find KID %s\n", kid_hex);
++            return -1;
++        }
++        memcpy(out, c->decryption_default_key, len);
++        return 0;
++    }
++    if (strlen(key_entry_hex->value) != len*2) {
++        return -1;
++    }
++    ff_hex_to_data(out, key_entry_hex->value);
++    return 0;
++}
++
+ static int cenc_scheme_decrypt(MOVContext *c, MOVStreamContext *sc, AVEncryptionInfo *sample, uint8_t *input, int size)
+ {
+     int i, ret;
+     int bytes_of_protected_data;
++    uint8_t decryption_keyAES_CTR_KEY_SIZE;
+ 
+     if (!sc->cenc.aes_ctr) {
++        ret = get_key_from_kid(decryption_key, sizeof(decryption_key), c, sample);
++        if (ret < 0) {
++            return ret;
++        }
++
+         /* initialize the cipher */
+         sc->cenc.aes_ctr = av_aes_ctr_alloc();
+         if (!sc->cenc.aes_ctr) {
+             return AVERROR(ENOMEM);
+         }
+ 
+-        ret = av_aes_ctr_init(sc->cenc.aes_ctr, c->decryption_key);
++        ret = av_aes_ctr_init(sc->cenc.aes_ctr, decryption_key);
+         if (ret < 0) {
+             return ret;
+         }
+@@ -7472,15 +7515,21 @@
+     int i, ret;
+     int num_of_encrypted_blocks;
+     uint8_t iv16;
++    uint8_t decryption_key16;
+ 
+     if (!sc->cenc.aes_ctx) {
++        ret = get_key_from_kid(decryption_key, sizeof(decryption_key), c, sample);
++        if (ret < 0) {
++            return ret;
++        }
++
+         /* initialize the cipher */
+         sc->cenc.aes_ctx = av_aes_alloc();
+         if (!sc->cenc.aes_ctx) {
+             return AVERROR(ENOMEM);
+         }
+ 
+-        ret = av_aes_init(sc->cenc.aes_ctx, c->decryption_key, 16 * 8, 1);
++        ret = av_aes_init(sc->cenc.aes_ctx, decryption_key, 16 * 8, 1);
+         if (ret < 0) {
+             return ret;
+         }
+@@ -7531,15 +7580,21 @@
+ {
+     int i, ret, rem_bytes;
+     uint8_t *data;
++    uint8_t decryption_keyAES_CTR_KEY_SIZE;
+ 
+     if (!sc->cenc.aes_ctr) {
++        ret = get_key_from_kid(decryption_key, sizeof(decryption_key), c, sample);
++        if (ret < 0) {
++            return ret;
++        }
++
+         /* initialize the cipher */
+         sc->cenc.aes_ctr = av_aes_ctr_alloc();
+         if (!sc->cenc.aes_ctr) {
+             return AVERROR(ENOMEM);
+         }
+ 
+-        ret = av_aes_ctr_init(sc->cenc.aes_ctr, c->decryption_key);
++        ret = av_aes_ctr_init(sc->cenc.aes_ctr, decryption_key);
+         if (ret < 0) {
+             return ret;
+         }
+@@ -7597,15 +7652,21 @@
+     int i, ret, rem_bytes;
+     uint8_t iv16;
+     uint8_t *data;
++    uint8_t decryption_key16;
+ 
+     if (!sc->cenc.aes_ctx) {
++        ret = get_key_from_kid(decryption_key, sizeof(decryption_key), c, sample);
++        if (ret < 0) {