| 1 | /*************************************************************************** |
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| 2 | * Copyright (c) 2003-2009, Broadcom Corporation |
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| 3 | * All Rights Reserved |
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| 4 | * Confidential Property of Broadcom Corporation |
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| 5 | * |
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| 6 | * THIS SOFTWARE MAY ONLY BE USED SUBJECT TO AN EXECUTED SOFTWARE LICENSE |
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| 7 | * AGREEMENT BETWEEN THE USER AND BROADCOM. YOU HAVE NO RIGHT TO USE OR |
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| 8 | * EXPLOIT THIS MATERIAL EXCEPT SUBJECT TO THE TERMS OF SUCH AN AGREEMENT. |
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| 9 | * |
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| 10 | * $brcm_Workfile: bsettop_stream_encryption.c $ |
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| 11 | * $brcm_Revision: 4 $ |
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| 12 | * $brcm_Date: 1/7/09 4:04p $ |
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| 13 | * |
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| 14 | * Module Description: |
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| 15 | * |
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| 16 | * Revision History: |
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| 17 | * |
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| 18 | * $brcm_Log: /BSEAV/api/src/nexus/bsettop_stream_encryption.c $ |
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| 19 | * |
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| 20 | * 4 1/7/09 4:04p mphillip |
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| 21 | * PR50093: Add Multi2 support to the nexus shim |
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| 22 | * |
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| 23 | * 3 12/24/08 11:57a jgarrett |
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| 24 | * PR 50703: Allowing security module to be absent |
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| 25 | * |
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| 26 | * 2 7/23/08 9:48a erickson |
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| 27 | * PR45058: fix static array overrun bug |
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| 28 | * |
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| 29 | * 1 7/2/08 5:11p vishk |
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| 30 | * PR 40020: bsettop_stream (crypto, network decryption): Develop |
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| 31 | * SettopAPI-to-Nexus shim layer |
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| 32 | * |
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| 33 | ***************************************************************************/ |
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| 34 | |
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| 35 | #include "bsettop_impl.h" |
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| 36 | #include <string.h> |
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| 37 | |
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| 38 | |
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| 39 | BDBG_MODULE(stream_encryption); |
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| 40 | |
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| 41 | |
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| 42 | void bencryption_params_init(bencryption_params *encryption) |
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| 43 | { |
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| 44 | if (encryption) { |
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| 45 | BKNI_Memset(encryption, 0, sizeof(*encryption)); |
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| 46 | encryption->pid = 0x1fff; /* default for bstream_set_encryption usage is to apply to all pids unless the pid is set */ |
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| 47 | } |
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| 48 | } |
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| 49 | |
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| 50 | bresult bstream_p_lookup_pid_info(bstream_t stream, unsigned short pid, unsigned *pid_channel, NEXUS_KeySlotHandle *KeySlotHandle, unsigned int *index) |
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| 51 | { |
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| 52 | int i; |
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| 53 | NEXUS_PidChannelStatus Status; |
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| 54 | |
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| 55 | for (i=0;i<BSETTOP_MAX_PIDS;i++) { |
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| 56 | /* Check the implementation of pid != 0xFFFF */ |
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| 57 | if (stream->pids[i].pid == pid) { |
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| 58 | *pid_channel = stream->pids[i].pidchannel; |
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| 59 | *KeySlotHandle = stream->pids[i].KeySlotHandle; |
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| 60 | return b_ok; |
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| 61 | } |
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| 62 | } |
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| 63 | |
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| 64 | for (i=0;i<BSETTOP_MAX_PIDS;i++) { |
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| 65 | if(!(stream->pids[i].pid)){ |
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| 66 | break; |
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| 67 | } |
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| 68 | } |
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| 69 | if (i == BSETTOP_MAX_PIDS) { |
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| 70 | goto error; |
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| 71 | } |
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| 72 | |
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| 73 | *index = i; |
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| 74 | |
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| 75 | if (!NEXUS_PidChannel_GetStatus(stream->consumers.decode->video_decode->nPidChannel, &Status)){ |
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| 76 | if(Status.pid == pid) { |
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| 77 | *pid_channel = Status.pidChannelIndex ; |
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| 78 | *KeySlotHandle = NULL; |
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| 79 | stream->pids[i].pid = Status.pid; |
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| 80 | stream->pids[i].pidchannel = Status.pidChannelIndex ; |
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| 81 | return b_ok; |
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| 82 | } |
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| 83 | } |
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| 84 | |
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| 85 | if (!NEXUS_PidChannel_GetStatus(stream->consumers.decode->audio_decode->nPidChannel, &Status)){ |
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| 86 | if(Status.pid == pid) { |
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| 87 | *pid_channel = Status.pidChannelIndex ; |
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| 88 | *KeySlotHandle = NULL; |
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| 89 | stream->pids[i].pid = Status.pid; |
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| 90 | stream->pids[i].pidchannel = Status.pidChannelIndex ; |
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| 91 | return b_ok; |
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| 92 | } |
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| 93 | } |
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| 94 | |
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| 95 | error: |
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| 96 | *pid_channel = 0xFFFFFFFF; /* bad number */ |
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| 97 | BDBG_WRN(("Unable to find pid 0x%x on pidparser %p", pid, *pid_channel)); |
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| 98 | return BSETTOP_ERROR(berr_not_available); |
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| 99 | } |
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| 100 | |
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| 101 | bresult bstream_p_reset_pid_info(bstream_t stream, unsigned short pid) |
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| 102 | { |
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| 103 | int i; |
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| 104 | for (i=0;i<BSETTOP_MAX_PIDS;i++) { |
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| 105 | if (stream->pids[i].pid == pid) { |
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| 106 | stream->pids[i].pid = 0; |
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| 107 | stream->pids[i].pidchannel = 0xFFFFFFFF; |
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| 108 | stream->pids[i].KeySlotHandle = NULL; /* Should i do this here? or does the free key slot handle take care of it? */ |
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| 109 | return 0; |
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| 110 | } |
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| 111 | } |
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| 112 | return BSETTOP_ERROR(b_ok); |
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| 113 | } |
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| 114 | |
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| 115 | /* |
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| 116 | * There is special handling of stream->storage.mpeg.encryption for the purposes of this function. |
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| 117 | * It is assumed that the algorithm will be the same for odd and even keys for video vs. audio. |
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| 118 | * |
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| 119 | */ |
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| 120 | |
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| 121 | bresult bstream_set_encryption(bstream_t stream, const bencryption_params *encryption) |
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| 122 | { |
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| 123 | #if NEXUS_HAS_SECURITY |
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| 124 | NEXUS_KeySlotHandle KeySlotHandle = NULL; |
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| 125 | NEXUS_SecurityClearKey ClearKey; |
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| 126 | NEXUS_SecurityKeySlotSettings Settings; |
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| 127 | unsigned int pid_channel, index=0; |
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| 128 | bool call_configure = false; |
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| 129 | NEXUS_SecurityAlgorithmSettings config_algorithm; |
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| 130 | NEXUS_Error rc; |
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| 131 | |
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| 132 | if (encryption->pid == 0x1fff) { |
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| 133 | bresult rc = b_ok; |
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| 134 | if (stream->consumers.decode) { |
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| 135 | bencryption_params per_pid_encryption; |
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| 136 | BKNI_Memcpy(&per_pid_encryption, encryption, sizeof(bencryption_params)); |
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| 137 | per_pid_encryption.pid = stream->mpeg.video[stream->consumers.decode->video_program].pid; |
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| 138 | rc = bstream_set_encryption(stream,&per_pid_encryption); |
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| 139 | if (rc == b_ok) { |
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| 140 | per_pid_encryption.pid = stream->mpeg.audio[stream->consumers.decode->audio_program].pid; |
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| 141 | rc = bstream_set_encryption(stream,&per_pid_encryption); |
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| 142 | } |
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| 143 | } else { |
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| 144 | bencryption_params per_pid_encryption; |
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| 145 | BKNI_Memcpy(&per_pid_encryption, encryption, sizeof(bencryption_params)); |
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| 146 | per_pid_encryption.pid = stream->mpeg.video[0].pid; |
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| 147 | rc = bstream_set_encryption(stream,&per_pid_encryption); |
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| 148 | if (rc == b_ok && stream->mpeg.audio[0].pid) { |
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| 149 | per_pid_encryption.pid = stream->mpeg.audio[0].pid; |
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| 150 | rc = bstream_set_encryption(stream,&per_pid_encryption); |
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| 151 | } |
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| 152 | if (rc == b_ok && stream->mpeg.audio[1].pid) { |
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| 153 | per_pid_encryption.pid = stream->mpeg.audio[1].pid; |
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| 154 | rc = bstream_set_encryption(stream,&per_pid_encryption); |
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| 155 | } |
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| 156 | } |
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| 157 | return rc; |
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| 158 | } |
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| 159 | |
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| 160 | if (encryption->type == bencryption_type_none) { |
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| 161 | KeySlotHandle = NULL; |
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| 162 | BDBG_MSG(("bstream_set_encryption: clearing encryption for %02x", encryption->pid)); |
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| 163 | |
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| 164 | if (!bstream_p_lookup_pid_info(stream, encryption->pid, &pid_channel, &KeySlotHandle, &index)) { |
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| 165 | if(KeySlotHandle) { |
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| 166 | rc = NEXUS_Security_RemovePidChannelFromKeySlot(KeySlotHandle, pid_channel); |
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| 167 | if (rc != 0) { |
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| 168 | BDBG_MSG(("NEXUS_Security_RemovePidChannelFromKeySlot: failed ")); |
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| 169 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 170 | } |
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| 171 | NEXUS_Security_FreeKeySlot(KeySlotHandle); |
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| 172 | bstream_p_reset_pid_info(stream, encryption->pid); |
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| 173 | } |
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| 174 | } |
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| 175 | /* using stream->mpeg.encryption to store configuration information */ |
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| 176 | stream->mpeg.encryption.type = bencryption_type_none; |
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| 177 | stream->mpeg.encryption.odd = false; |
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| 178 | stream->mpeg.encryption.even = false; |
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| 179 | stream->ca_state.video_odd_key_config = 0; |
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| 180 | stream->ca_state.video_even_key_config = 0; |
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| 181 | stream->ca_state.audio_odd_key_config = 0; |
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| 182 | stream->ca_state.audio_even_key_config = 0; |
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| 183 | } |
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| 184 | else |
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| 185 | { |
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| 186 | if (encryption->key_ladder) { |
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| 187 | BDBG_ERR(("bstream_set_encryption: keyladder is not supported")); |
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| 188 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 189 | } |
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| 190 | |
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| 191 | if (bstream_p_lookup_pid_info(stream, encryption->pid, &pid_channel, &KeySlotHandle, &index)) { |
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| 192 | BDBG_ERR(("bstream_set_encryption: failed to look up pid channel for pid: %02x",encryption->pid)); |
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| 193 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 194 | } |
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| 195 | |
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| 196 | if (!KeySlotHandle) { |
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| 197 | NEXUS_Security_GetDefaultKeySlotSettings(&Settings); |
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| 198 | Settings.keySlotEngine = NEXUS_SecurityEngine_eCa; |
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| 199 | BDBG_MSG(("bstream_set_encryption: Allocating new key slot (type: %d)")); |
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| 200 | |
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| 201 | KeySlotHandle = NEXUS_Security_AllocateKeySlot(&Settings); |
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| 202 | stream->pids[index].KeySlotHandle = KeySlotHandle; |
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| 203 | } |
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| 204 | |
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| 205 | /* BKNI_Memset(&config_algorithm, 0, sizeof(NEXUS_SecurityAlgorithmSettings)); */ |
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| 206 | NEXUS_Security_GetDefaultAlgorithmSettings(&config_algorithm); |
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| 207 | |
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| 208 | switch (encryption->residue) { |
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| 209 | case bencryption_residue_none: |
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| 210 | BDBG_MSG(("bstream_set_encryption: configuring no residue")); |
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| 211 | config_algorithm.terminationMode = NEXUS_SecurityTerminationMode_eClear; |
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| 212 | break; |
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| 213 | case bencryption_residue_block_term: |
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| 214 | BDBG_MSG(("bstream_set_encryption: configuring block termination mode")); |
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| 215 | config_algorithm.terminationMode = NEXUS_SecurityTerminationMode_eBlock; |
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| 216 | break; |
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| 217 | case bencryption_residue_cipher_text: |
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| 218 | BDBG_MSG(("bstream_set_encryption: configuring cipher text stealing")); |
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| 219 | config_algorithm.terminationMode = NEXUS_SecurityTerminationMode_eCipherStealing; |
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| 220 | break; |
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| 221 | } |
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| 222 | |
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| 223 | switch (encryption->type) { |
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| 224 | case bencryption_type_dvb: |
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| 225 | BDBG_MSG(("bstream_set_encryption: configuring DVB for %s",stream->mpeg.mpeg_type == bstream_mpeg_type_pes ? "PES" : "TS")); |
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| 226 | config_algorithm.algorithm = NEXUS_SecurityAlgorithm_eDvb; |
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| 227 | config_algorithm.dvbScramLevel = stream->mpeg.mpeg_type == bstream_mpeg_type_pes ? NEXUS_SecurityDvbScrambleLevel_ePes : NEXUS_SecurityDvbScrambleLevel_eTs; |
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| 228 | ClearKey.keySize = 8; /* 8 bytes (64 bits) */ |
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| 229 | break; |
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| 230 | case bencryption_type_aes: |
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| 231 | BDBG_MSG(("bstream_set_encryption: configuring AES for %s",encryption->blockmode == bcrypto_blockmode_cbc ? "CBC" : "ECB")); |
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| 232 | config_algorithm.algorithm = NEXUS_SecurityAlgorithm_eAes; |
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| 233 | config_algorithm.algorithmVar = encryption->blockmode == bcrypto_blockmode_cbc ? NEXUS_SecurityAlgorithmVariant_eCbc : NEXUS_SecurityAlgorithmVariant_eEcb; |
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| 234 | ClearKey.keySize = 16; /* 16 bytes (128 bits) */ |
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| 235 | break; |
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| 236 | case bencryption_type_des: |
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| 237 | BDBG_MSG(("bstream_set_encryption: configuring DES for %s",encryption->blockmode == bcrypto_blockmode_cbc ? "CBC" : "ECB")); |
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| 238 | config_algorithm.algorithm = NEXUS_SecurityAlgorithm_eDes; |
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| 239 | config_algorithm.algorithmVar = encryption->blockmode == bcrypto_blockmode_cbc ? NEXUS_SecurityAlgorithmVariant_eCbc : NEXUS_SecurityAlgorithmVariant_eEcb; |
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| 240 | ClearKey.keySize = 8; /* 8 bytes (64 bits) */ |
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| 241 | break; |
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| 242 | case bencryption_type_3des: |
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| 243 | BDBG_MSG(("bstream_set_encryption: configuring 3DES for %s",encryption->blockmode == bcrypto_blockmode_cbc ? "CBC" : "ECB")); |
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| 244 | config_algorithm.algorithm = NEXUS_SecurityAlgorithm_e3DesAba; |
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| 245 | config_algorithm.algorithmVar = encryption->blockmode == bcrypto_blockmode_cbc ? NEXUS_SecurityAlgorithmVariant_eCbc : NEXUS_SecurityAlgorithmVariant_eEcb; |
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| 246 | ClearKey.keySize = 16; /* 16 bytes (128 bits) */ |
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| 247 | break; |
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| 248 | case bencryption_type_multi2: |
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| 249 | BDBG_MSG(("bstream_set_encryption: configuring multi2 for %s",encryption->blockmode == bcrypto_blockmode_cbc ? "CBC" : "ECB")); |
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| 250 | config_algorithm.algorithm = NEXUS_SecurityAlgorithm_eMulti2; |
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| 251 | config_algorithm.algorithmVar = encryption->blockmode == bcrypto_blockmode_cbc ? NEXUS_SecurityAlgorithmVariant_eCbc : NEXUS_SecurityAlgorithmVariant_eEcb; |
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| 252 | config_algorithm.multi2KeySelect = encryption->m2_key_select; |
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| 253 | ClearKey.keySize = 8; /* 8 bytes (64 bits) */ |
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| 254 | break; |
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| 255 | default: |
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| 256 | BDBG_ERR(("bstream_set_encryption: unsupported CA algorithm")); |
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| 257 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 258 | } |
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| 259 | |
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| 260 | if (encryption->use_cps) { |
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| 261 | call_configure = true; |
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| 262 | } else { |
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| 263 | if (stream->consumers.decode) { |
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| 264 | if (encryption->pid == stream->mpeg.video[stream->consumers.decode->video_program].pid) { |
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| 265 | if (encryption->odd && (encryption->pid != stream->ca_state.video_odd_key_config) ) { |
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| 266 | stream->ca_state.video_odd_key_config = encryption->pid; |
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| 267 | stream->ca_state.video_even_key_config = encryption->pid; |
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| 268 | call_configure = true; |
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| 269 | } |
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| 270 | if (encryption->even && (encryption->pid != stream->ca_state.video_odd_key_config) ) { |
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| 271 | stream->ca_state.video_odd_key_config = encryption->pid; |
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| 272 | stream->ca_state.video_even_key_config = encryption->pid; |
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| 273 | call_configure = true; |
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| 274 | } |
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| 275 | } |
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| 276 | if (encryption->pid == stream->mpeg.audio[stream->consumers.decode->audio_program].pid) { |
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| 277 | if (encryption->odd && (encryption->pid != stream->ca_state.audio_odd_key_config) ) { |
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| 278 | stream->ca_state.audio_odd_key_config = encryption->pid; |
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| 279 | stream->ca_state.audio_even_key_config = encryption->pid; |
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| 280 | call_configure = true; |
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| 281 | } |
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| 282 | if (encryption->even && (encryption->pid != stream->ca_state.audio_odd_key_config) ) { |
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| 283 | stream->ca_state.audio_odd_key_config = encryption->pid; |
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| 284 | stream->ca_state.audio_even_key_config = encryption->pid; |
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| 285 | call_configure = true; |
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| 286 | } |
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| 287 | } |
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| 288 | } else { |
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| 289 | if (encryption->pid == stream->mpeg.video[0].pid) { |
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| 290 | if (encryption->odd && (encryption->pid != stream->ca_state.video_odd_key_config)) { |
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| 291 | stream->ca_state.video_odd_key_config = encryption->pid; |
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| 292 | call_configure = true; |
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| 293 | } |
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| 294 | if (encryption->even && (encryption->pid != stream->ca_state.video_even_key_config)) { |
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| 295 | stream->ca_state.video_even_key_config = encryption->pid; |
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| 296 | call_configure = true; |
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| 297 | } |
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| 298 | } |
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| 299 | if (encryption->pid == stream->mpeg.audio[0].pid || |
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| 300 | encryption->pid == stream->mpeg.audio[1].pid ) { |
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| 301 | if (encryption->odd && (encryption->pid != stream->ca_state.audio_odd_key_config)) { |
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| 302 | stream->ca_state.audio_odd_key_config = encryption->pid; |
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| 303 | call_configure = true; |
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| 304 | } |
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| 305 | if (encryption->even && (encryption->pid != stream->ca_state.audio_even_key_config)) { |
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| 306 | stream->ca_state.audio_even_key_config = encryption->pid; |
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| 307 | call_configure = true; |
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| 308 | } |
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| 309 | } |
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| 310 | } |
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| 311 | } |
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| 312 | |
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| 313 | if (call_configure) { |
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| 314 | |
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| 315 | rc = NEXUS_Security_ConfigAlgorithm( KeySlotHandle, &config_algorithm); |
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| 316 | if (rc != 0) { |
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| 317 | BDBG_MSG(("bstream_set_encryption: failed to configure algorithm")); |
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| 318 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 319 | } |
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| 320 | stream->mpeg.encryption.type = encryption->type; |
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| 321 | |
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| 322 | rc = NEXUS_Security_AddPidChannelToKeySlot(KeySlotHandle, pid_channel); |
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| 323 | if (rc != 0) { |
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| 324 | BDBG_ERR(("bstream_set_encryption: failed to configure pid key pointer table")); |
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| 325 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 326 | } |
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| 327 | } |
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| 328 | |
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| 329 | if (encryption->key_ladder) { |
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| 330 | BDBG_ERR(("bstream_set_encryption: Keyladder is not supported")); |
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| 331 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 332 | } |
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| 333 | else { |
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| 334 | if (encryption->type == bencryption_type_multi2) { |
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| 335 | NEXUS_SecurityMulti2Settings config_multi2; |
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| 336 | |
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| 337 | NEXUS_Security_GetDefaultMulti2Settings(&config_multi2); |
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| 338 | config_multi2.multi2KeySelect = encryption->m2_key_select; |
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| 339 | config_multi2.multi2Rounds = encryption->m2_round; |
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| 340 | memcpy(config_multi2.multi2SysKey, encryption->m2_sys_key, 32); |
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| 341 | |
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| 342 | if ( NEXUS_Security_ConfigMulti2(KeySlotHandle, &config_multi2) != 0 ) |
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| 343 | { |
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| 344 | BDBG_ERR(("bstream_set_encryption: multi2 configuration failed")); |
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| 345 | return BSETTOP_ERROR(berr_external_error); |
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| 346 | } |
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| 347 | } |
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| 348 | |
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| 349 | /* Route a clear key */ |
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| 350 | BKNI_Memcpy(ClearKey.keyData,encryption->key,encryption->key_length/8); |
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| 351 | ClearKey.keyEntryType = encryption->odd ? NEXUS_SecurityKeyType_eOdd : NEXUS_SecurityKeyType_eEven; |
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| 352 | BDBG_MSG(("NEXUS_Security_LoadClearKey called if odd key is set")); |
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| 353 | |
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| 354 | rc = NEXUS_Security_LoadClearKey( KeySlotHandle, &ClearKey); |
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| 355 | if (rc != 0) { |
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| 356 | BDBG_MSG(("bstream_set_encryption: failed to route user key")); |
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| 357 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 358 | } |
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| 359 | if (encryption->odd && encryption->even) { |
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| 360 | ClearKey.keyEntryType = NEXUS_SecurityKeyType_eEven; |
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| 361 | BDBG_MSG(("NEXUS_Security_LoadClearKey called if odd n even key are set")); |
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| 362 | |
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| 363 | rc = NEXUS_Security_LoadClearKey( KeySlotHandle, &ClearKey); |
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| 364 | if (rc != 0) { |
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| 365 | BDBG_MSG(("bstream_set_encryption: failed to route user key")); |
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| 366 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 367 | } |
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| 368 | } |
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| 369 | if (encryption->blockmode == bcrypto_blockmode_cbc) { |
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| 370 | ClearKey.keySize = 16; /* 16 bytes */ |
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| 371 | BKNI_Memcpy(ClearKey.keyData,encryption->iv,16); |
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| 372 | ClearKey.keyEntryType = NEXUS_SecurityKeyType_eIv; |
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| 373 | BDBG_MSG(("NEXUS_Security_LoadClearKey called for IV")); |
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| 374 | |
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| 375 | rc = NEXUS_Security_LoadClearKey( KeySlotHandle, &ClearKey); |
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| 376 | if (rc != 0) { |
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| 377 | BDBG_MSG(("bstream_set_encryption: failed to load IV")); |
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| 378 | return BSETTOP_ERROR(berr_invalid_parameter); |
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| 379 | } |
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| 380 | } |
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| 381 | } |
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| 382 | } |
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| 383 | #else |
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| 384 | BSTD_UNUSED(stream); |
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| 385 | BSTD_UNUSED(encryption); |
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| 386 | #endif /* NEXUS_HAS_SECURITY */ |
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| 387 | return b_ok; |
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| 388 | } |
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| 389 | |
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