netwerk/srtp/src/crypto/include/rand_source.h@6474c204b198 (annotated)
netwerk/srtp/src/crypto/include/rand_source.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 | * rand_source.h |
| michael@0 | 3 | * |
| michael@0 | 4 | * implements a random source based on /dev/random |
| 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 | |
| michael@0 | 46 | #ifndef RAND_SOURCE |
| michael@0 | 47 | #define RAND_SOURCE |
| michael@0 | 48 | |
| michael@0 | 49 | #include "err.h" |
| michael@0 | 50 | #include "datatypes.h" |
| michael@0 | 51 | |
| michael@0 | 52 | err_status_t |
| michael@0 | 53 | rand_source_init(void); |
| michael@0 | 54 | |
| michael@0 | 55 | /* |
| michael@0 | 56 | * rand_source_get_octet_string() writes a random octet string. |
| michael@0 | 57 | * |
| michael@0 | 58 | * The function call rand_source_get_octet_string(dest, len) writes |
| michael@0 | 59 | * len octets of random data to the location to which dest points, |
| michael@0 | 60 | * and returns an error code. This error code should be checked, |
| michael@0 | 61 | * and if a failure is reported, the data in the buffer MUST NOT |
| michael@0 | 62 | * be used. |
| michael@0 | 63 | * |
| michael@0 | 64 | * warning: If the return code is not checked, then non-random |
| michael@0 | 65 | * data may inadvertently be used. |
| michael@0 | 66 | * |
| michael@0 | 67 | * returns: |
| michael@0 | 68 | * - err_status_ok if no problems occured. |
| michael@0 | 69 | * - [other] a problem occured, and no assumptions should |
| michael@0 | 70 | * be made about the contents of the destination |
| michael@0 | 71 | * buffer. |
| michael@0 | 72 | */ |
| michael@0 | 73 | |
| michael@0 | 74 | err_status_t |
| michael@0 | 75 | rand_source_get_octet_string(void *dest, uint32_t length); |
| michael@0 | 76 | |
| michael@0 | 77 | err_status_t |
| michael@0 | 78 | rand_source_deinit(void); |
| michael@0 | 79 | |
| michael@0 | 80 | /* |
| michael@0 | 81 | * function prototype for a random source function |
| michael@0 | 82 | * |
| michael@0 | 83 | * A rand_source_func_t writes num_octets at the location indicated by |
| michael@0 | 84 | * dest and returns err_status_ok. Any other return value indicates |
| michael@0 | 85 | * failure. |
| michael@0 | 86 | */ |
| michael@0 | 87 | |
| michael@0 | 88 | typedef err_status_t (*rand_source_func_t) |
| michael@0 | 89 | (void *dest, uint32_t num_octets); |
| michael@0 | 90 | |
| michael@0 | 91 | #endif /* RAND_SOURCE */ |
