netwerk/srtp/src/crypto/include/prng.h@6474c204b198 (annotated)
netwerk/srtp/src/crypto/include/prng.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* |
| michael@0 | 2 | * prng.h |
| michael@0 | 3 | * |
| michael@0 | 4 | * pseudorandom source |
| michael@0 | 5 | * |
| michael@0 | 6 | * David A. McGrew |
| michael@0 | 7 | * Cisco Systems, Inc. |
| michael@0 | 8 | */ |
| michael@0 | 9 | /* |
| michael@0 | 10 | * |
| michael@0 | 11 | * Copyright (c) 2001-2006, Cisco Systems, Inc. |
| michael@0 | 12 | * All rights reserved. |
| michael@0 | 13 | * |
| michael@0 | 14 | * Redistribution and use in source and binary forms, with or without |
| michael@0 | 15 | * modification, are permitted provided that the following conditions |
| michael@0 | 16 | * are met: |
| michael@0 | 17 | * |
| michael@0 | 18 | * Redistributions of source code must retain the above copyright |
| michael@0 | 19 | * notice, this list of conditions and the following disclaimer. |
| michael@0 | 20 | * |
| michael@0 | 21 | * Redistributions in binary form must reproduce the above |
| michael@0 | 22 | * copyright notice, this list of conditions and the following |
| michael@0 | 23 | * disclaimer in the documentation and/or other materials provided |
| michael@0 | 24 | * with the distribution. |
| michael@0 | 25 | * |
| michael@0 | 26 | * Neither the name of the Cisco Systems, Inc. nor the names of its |
| michael@0 | 27 | * contributors may be used to endorse or promote products derived |
| michael@0 | 28 | * from this software without specific prior written permission. |
| michael@0 | 29 | * |
| michael@0 | 30 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 31 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 32 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| michael@0 | 33 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| michael@0 | 34 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| michael@0 | 35 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| michael@0 | 36 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| michael@0 | 37 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| michael@0 | 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| michael@0 | 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| michael@0 | 40 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| michael@0 | 41 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 42 | * |
| michael@0 | 43 | */ |
| michael@0 | 44 | |
| michael@0 | 45 | #ifndef PRNG_H |
| michael@0 | 46 | #define PRNG_H |
| michael@0 | 47 | |
| michael@0 | 48 | #include "rand_source.h" /* for rand_source_func_t definition */ |
| michael@0 | 49 | #include "aes.h" /* for aes */ |
| michael@0 | 50 | #include "aes_icm.h" /* for aes ctr */ |
| michael@0 | 51 | |
| michael@0 | 52 | #define MAX_PRNG_OUT_LEN 0xffffffffU |
| michael@0 | 53 | |
| michael@0 | 54 | /* |
| michael@0 | 55 | * x917_prng is an ANSI X9.17-like AES-based PRNG |
| michael@0 | 56 | */ |
| michael@0 | 57 | |
| michael@0 | 58 | typedef struct { |
| michael@0 | 59 | v128_t state; /* state data */ |
| michael@0 | 60 | aes_expanded_key_t key; /* secret key */ |
| michael@0 | 61 | uint32_t octet_count; /* number of octets output since last init */ |
| michael@0 | 62 | rand_source_func_t rand; /* random source for re-initialization */ |
| michael@0 | 63 | } x917_prng_t; |
| michael@0 | 64 | |
| michael@0 | 65 | err_status_t |
| michael@0 | 66 | x917_prng_init(rand_source_func_t random_source); |
| michael@0 | 67 | |
| michael@0 | 68 | err_status_t |
| michael@0 | 69 | x917_prng_get_octet_string(uint8_t *dest, uint32_t len); |
| michael@0 | 70 | |
| michael@0 | 71 | |
| michael@0 | 72 | /* |
| michael@0 | 73 | * ctr_prng is an AES-CTR based PRNG |
| michael@0 | 74 | */ |
| michael@0 | 75 | |
| michael@0 | 76 | typedef struct { |
| michael@0 | 77 | uint32_t octet_count; /* number of octets output since last init */ |
| michael@0 | 78 | aes_icm_ctx_t state; /* state data */ |
| michael@0 | 79 | rand_source_func_t rand; /* random source for re-initialization */ |
| michael@0 | 80 | } ctr_prng_t; |
| michael@0 | 81 | |
| michael@0 | 82 | err_status_t |
| michael@0 | 83 | ctr_prng_init(rand_source_func_t random_source); |
| michael@0 | 84 | |
| michael@0 | 85 | err_status_t |
| michael@0 | 86 | ctr_prng_get_octet_string(void *dest, uint32_t len); |
| michael@0 | 87 | |
| michael@0 | 88 | |
| michael@0 | 89 | #endif |
