| 1 | /* -*- c -*- |
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| 2 | * |
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| 3 | * ---------------------------------------------------------------------- |
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| 4 | * TRI's Simple Stream encryption system implementation |
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| 5 | * ---------------------------------------------------------------------- |
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| 6 | * Created : Fri Apr 14 14:20:00 1995 tri |
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| 7 | * Last modified: Wed Jul 12 21:59:05 1995 ylo |
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| 8 | * ---------------------------------------------------------------------- |
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| 9 | * Copyright (c) 1995 |
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| 10 | * Timo J. Rinne <tri@iki.fi> and Cirion oy. |
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| 11 | * |
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| 12 | * Address: Cirion oy, PO-BOX 250, 00121 HELSINKI, Finland |
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| 13 | * |
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| 14 | * Even though this code is copyrighted property of the author, it can |
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| 15 | * still be used for non-commercial purposes under following conditions: |
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| 16 | * |
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| 17 | * 1) This copyright notice is not removed. |
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| 18 | * 2) Source code follows any distribution of the software |
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| 19 | * if possible. |
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| 20 | * 3) Copyright notice above is found in the documentation |
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| 21 | * of the distributed software. |
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| 22 | * |
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| 23 | * For possibility to use this source code for commercial product, |
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| 24 | * please contact address above. |
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| 25 | * |
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| 26 | * Any express or implied warranties are disclaimed. In no event |
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| 27 | * shall the author be liable for any damages caused (directly or |
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| 28 | * otherwise) by the use of this software. |
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| 29 | * |
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| 30 | * Permission granted to Mr. Tatu Ylonen <ylo@cs.hut.fi> to include this |
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| 31 | * code into SSH (Secure Shell). Permission is granted to anyone to |
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| 32 | * use and distribute this code for any purpose as part of that product. |
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| 33 | * ---------------------------------------------------------------------- |
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| 34 | */ |
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| 35 | #ifndef __TSS_H__ |
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| 36 | #define __TSS_H__ 1 |
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| 37 | |
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| 38 | /* |
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| 39 | * TSS_POOL_BYTES has to be 2^n and even multiple of 16. |
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| 40 | * 16k pool (0x4000) is standard and big enough. |
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| 41 | */ |
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| 42 | #define TSS_POOL_BYTES 0x4000 |
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| 43 | #define TSS_POOL_MASK (TSS_POOL_BYTES - 1) |
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| 44 | /* |
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| 45 | * TSS_SALT_BYTES has to be more than 0x10 but it should not be too big. |
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| 46 | * 0x20 is standard and OK. |
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| 47 | */ |
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| 48 | #define TSS_SALT_BYTES 0x20 |
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| 49 | |
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| 50 | struct tss_context { |
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| 51 | unsigned char key[TSS_POOL_BYTES]; |
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| 52 | unsigned char salt[TSS_SALT_BYTES]; |
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| 53 | int keyidx; |
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| 54 | }; |
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| 55 | |
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| 56 | /* |
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| 57 | * Inits TSS context with given key. |
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| 58 | */ |
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| 59 | int TSS_Init(struct tss_context *context, |
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| 60 | const unsigned char *key, |
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| 61 | int keylen); |
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| 62 | |
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| 63 | /* |
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| 64 | * Encrypts (decrypts) one data block within TSS context. |
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| 65 | */ |
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| 66 | int TSS_Encrypt(struct tss_context *context, |
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| 67 | unsigned char *data, |
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| 68 | unsigned int len); |
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| 69 | int TSS_Decrypt(struct tss_context *context, |
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| 70 | unsigned char *data, |
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| 71 | unsigned int len); |
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| 72 | |
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| 73 | #endif /* not __TSS_H__ */ |
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| 74 | |
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| 75 | /* EOF (tss.h) */ |
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