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157 lines
6.4 KiB
C
157 lines
6.4 KiB
C
/*
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* SRT - Secure, Reliable, Transport
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* Copyright (c) 2018 Haivision Systems Inc.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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*/
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/*****************************************************************************
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written by
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Haivision Systems Inc.
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2011-06-23 (jdube)
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HaiCrypt initial implementation.
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2014-03-11 (jdube)
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Adaptation for SRT.
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*****************************************************************************/
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#ifndef HCRYPT_MSG_H
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#define HCRYPT_MSG_H
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/*
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* HaiCrypt Transport Message Header info
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*/
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#ifndef HCRYPT_DSP
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#include <sys/types.h>
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typedef uint32_t hcrypt_Pki;
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#endif /* HCRYPT_DSP */
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#define HCRYPT_MSG_VERSION 1 /* Current HaiCrypt version */
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#define HCRYPT_MSG_SIGN (('H'-'@')<<10 | ('A'-'@')<<5 | ('I'-'@')) /* Haivision PnP Mfr ID 'HAI' */
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#define HCRYPT_PKI_SZ 4 /* Packet Index size (CTR mode cipher) */
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#define HCRYPT_MSG_PT_MS 1 /* Media stream */
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#define HCRYPT_MSG_PT_KM 2 /* Keying Material */
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#define HCRYPT_MSG_PT_RESV7 7 /* Reserved to dicriminate MPEG-TS packet (SyncByte=0x47) */
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#define HCRYPT_MSG_F_eSEK 0x01 /* Even Stream Encrypting Key */
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#define HCRYPT_MSG_F_oSEK 0x02 /* Odd Stream Encrypting Key */
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#define HCRYPT_MSG_F_xSEK 0x03 /* Both Stream Encrypting Keys */
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typedef struct {
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int hdr_len; // data and control common prefix portion
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int pfx_len; // Message Prefix len. Also payload offset
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unsigned (*getKeyFlags)(unsigned char *msg);
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hcrypt_Pki (*getPki)(unsigned char *msg, int nwko);
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void (*setPki)(unsigned char *msg, hcrypt_Pki);
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void (*resetCache)(unsigned char *pfx_cache, unsigned pkt_type, unsigned flags);
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void (*indexMsg)(unsigned char *msg, unsigned char *pfx_cache);
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int (*parseMsg)(unsigned char *msg);
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}hcrypt_MsgInfo;
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#define hcryptMsg_GetKeyIndex(mi,msg) ((mi)->getKeyFlags(msg)>>1)
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#define hcryptMsg_GetPki(mi,msg,nwko) ((mi)->getPki(msg,nwko))
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#define hcryptMsg_SetPki(mi,msg,pki) (mi)->setPki(msg, pki)
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#define hcryptMsg_HasEvenSek(mi,msg) ((mi)->getKeyFlags(msg) & HCRYPT_MSG_F_eSEK)
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#define hcryptMsg_HasOddSek(mi,msg) ((mi)->getKeyFlags(msg) & HCRYPT_MSG_F_oSEK)
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#define hcryptMsg_HasBothSek(mi,msg) (HCRYPT_MSG_F_xSEK == ((mi)->getKeyFlags(msg) & HCRYPT_MSG_F_xSEK))
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#define hcryptMsg_HasNoSek(mi,msg) (0 == ((mi)->getKeyFlags(msg) & HCRYPT_MSG_F_xSEK))
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#define hcryptMsg_PaddedLen(len, fact) ((((len)+(fact)-1)/(fact))*(fact))
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/*
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* HaiCrypt KMmsg (Keying Material):
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*
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* 0 1 2 3
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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*+0x00 |0|Vers | PT | Sign | resv |KF |
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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*+0x04 | KEKI |
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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*+0x08 | Cipher | Auth | SE | Resv1 |
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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*+0x0C | Resv2 | Slen/4 | Klen/4 |
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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*+0x10 | Salt |
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* | ... |
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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* | Wrap |
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* | ... |
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* +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+
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*/
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#define HCRYPT_MSG_KM_OFS_VERSION 0
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#define HCRYPT_MSG_KM_OFS_PT 0
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#define HCRYPT_MSG_KM_OFS_SIGN 1
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#define HCRYPT_MSG_KM_OFS_KFLGS 3
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#define HCRYPT_MSG_KM_RSH_KFLGS 0 /* Right shift (in byte) */
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#define HCRYPT_MSG_KM_OFS_KEKI 4
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#define HCRYPT_MSG_KM_OFS_CIPHER 8
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#define HCRYPT_MSG_KM_OFS_AUTH 9
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#define HCRYPT_MSG_KM_OFS_SE 10
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#define HCRYPT_MSG_KM_OFS_RESV2 12
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#define HCRYPT_MSG_KM_OFS_SLEN 14
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#define HCRYPT_MSG_KM_OFS_KLEN 15
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#define HCRYPT_MSG_KM_OFS_SALT 16
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#define HCRYPT_MSG_KM_MAX_SZ (0 \
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+ HCRYPT_MSG_KM_OFS_SALT \
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+ HAICRYPT_SALT_SZ \
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+ (HAICRYPT_KEY_MAX_SZ * 2) \
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+ HAICRYPT_WRAPKEY_SIGN_SZ)
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#define HCRYPT_CIPHER_NONE 0
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#define HCRYPT_CIPHER_AES_ECB 1
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#define HCRYPT_CIPHER_AES_CTR 2
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#define HCRYPT_CIPHER_AES_CBC 3
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#define HCRYPT_CIPHER_AES_GCM 4
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#define HCRYPT_AUTH_NONE 0
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#define HCRYPT_AUTH_AES_GCM 1
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#define HCRYPT_SE_TSUDP 1
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hcrypt_MsgInfo * hcryptMsg_STA_MsgInfo(void);
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#define HCRYPT_SE_TSSRT 2
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hcrypt_MsgInfo * hcryptMsg_SRT_MsgInfo(void);
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#define hcryptMsg_KM_GetVersion(msg) (((msg)[HCRYPT_MSG_KM_OFS_VERSION]>>4)& 0xF)
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#define hcryptMsg_KM_GetPktType(msg) (((msg)[HCRYPT_MSG_KM_OFS_PT]) & 0xF)
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#define hcryptMsg_KM_GetSign(msg) (((msg)[HCRYPT_MSG_KM_OFS_SIGN]<<8) | (msg)[HCRYPT_MSG_KM_OFS_SIGN+1])
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#define hcryptMsg_KM_GetKeyIndex(msg) (((msg)[HCRYPT_MSG_KM_OFS_KFLGS] & HCRYPT_MSG_F_xSEK)>>1)
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#define hcryptMsg_KM_HasEvenSek(msg) ((msg)[HCRYPT_MSG_KM_OFS_KFLGS] & HCRYPT_MSG_F_eSEK)
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#define hcryptMsg_KM_HasOddSek(msg) ((msg)[HCRYPT_MSG_KM_OFS_KFLGS] & HCRYPT_MSG_F_oSEK)
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#define hcryptMsg_KM_HasBothSek(msg) (HCRYPT_MSG_F_xSEK == ((msg)[HCRYPT_MSG_KM_OFS_KFLGS] & HCRYPT_MSG_F_xSEK))
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#define hcryptMsg_KM_HasNoSek(msg) (0 == ((msg)[HCRYPT_MSG_KM_OFS_KFLGS] & HCRYPT_MSG_F_xSEK))
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#define hcryptMsg_KM_GetCipher(msg) ((msg)[HCRYPT_MSG_KM_OFS_CIPHER])
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#define hcryptMsg_KM_GetAuth(msg) ((msg)[HCRYPT_MSG_KM_OFS_AUTH])
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#define hcryptMsg_KM_GetSE(msg) ((msg)[HCRYPT_MSG_KM_OFS_SE])
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#define hcryptMsg_KM_GetSaltLen(msg) (size_t)((msg)[HCRYPT_MSG_KM_OFS_SLEN] * 4)
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#define hcryptMsg_KM_GetSekLen(msg) (size_t)((msg)[HCRYPT_MSG_KM_OFS_KLEN] * 4)
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#define hcryptMsg_KM_SetSaltLen(msg,len)do {(msg)[HCRYPT_MSG_KM_OFS_SLEN] = (unsigned char)(len)/4;} while(0)
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#define hcryptMsg_KM_SetSekLen(msg,len) do {(msg)[HCRYPT_MSG_KM_OFS_KLEN] = (unsigned char)(len)/4;} while(0)
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#endif /* HCRYPT_MSG_H */
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