Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* |
| 2 | * sha1.h |
| 3 | * |
| 4 | * interface to the Secure Hash Algorithm v.1 (SHA-1), specified in |
| 5 | * FIPS 180-1 |
| 6 | * |
| 7 | * David A. McGrew |
| 8 | * Cisco Systems, Inc. |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * |
| 13 | * Copyright (c) 2001-2006, Cisco Systems, Inc. |
| 14 | * All rights reserved. |
| 15 | * |
| 16 | * Redistribution and use in source and binary forms, with or without |
| 17 | * modification, are permitted provided that the following conditions |
| 18 | * are met: |
| 19 | * |
| 20 | * Redistributions of source code must retain the above copyright |
| 21 | * notice, this list of conditions and the following disclaimer. |
| 22 | * |
| 23 | * Redistributions in binary form must reproduce the above |
| 24 | * copyright notice, this list of conditions and the following |
| 25 | * disclaimer in the documentation and/or other materials provided |
| 26 | * with the distribution. |
| 27 | * |
| 28 | * Neither the name of the Cisco Systems, Inc. nor the names of its |
| 29 | * contributors may be used to endorse or promote products derived |
| 30 | * from this software without specific prior written permission. |
| 31 | * |
| 32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 35 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 36 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, |
| 37 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 38 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 39 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 40 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 41 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 42 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 43 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 44 | * |
| 45 | */ |
| 46 | |
| 47 | #ifndef SHA1_H |
| 48 | #define SHA1_H |
| 49 | |
| 50 | #include "err.h" |
| 51 | #include "datatypes.h" |
| 52 | |
| 53 | typedef struct { |
| 54 | uint32_t H[5]; /* state vector */ |
| 55 | uint32_t M[16]; /* message buffer */ |
| 56 | int octets_in_buffer; /* octets of message in buffer */ |
| 57 | uint32_t num_bits_in_msg; /* total number of bits in message */ |
| 58 | } sha1_ctx_t; |
| 59 | |
| 60 | /* |
| 61 | * sha1(&ctx, msg, len, output) hashes the len octets starting at msg |
| 62 | * into the SHA1 context, then writes the result to the 20 octets at |
| 63 | * output |
| 64 | * |
| 65 | */ |
| 66 | |
| 67 | void |
| 68 | sha1(const uint8_t *message, int octets_in_msg, uint32_t output[5]); |
| 69 | |
| 70 | /* |
| 71 | * sha1_init(&ctx) initializes the SHA1 context ctx |
| 72 | * |
| 73 | * sha1_update(&ctx, msg, len) hashes the len octets starting at msg |
| 74 | * into the SHA1 context |
| 75 | * |
| 76 | * sha1_final(&ctx, output) performs the final processing of the SHA1 |
| 77 | * context and writes the result to the 20 octets at output |
| 78 | * |
| 79 | */ |
| 80 | |
| 81 | void |
| 82 | sha1_init(sha1_ctx_t *ctx); |
| 83 | |
| 84 | void |
| 85 | sha1_update(sha1_ctx_t *ctx, const uint8_t *M, int octets_in_msg); |
| 86 | |
| 87 | void |
| 88 | sha1_final(sha1_ctx_t *ctx, uint32_t output[5]); |
| 89 | |
| 90 | /* |
| 91 | * The sha1_core function is INTERNAL to SHA-1, but it is declared |
| 92 | * here because it is also used by the cipher SEAL 3.0 in its key |
| 93 | * setup algorithm. |
| 94 | */ |
| 95 | |
| 96 | /* |
| 97 | * sha1_core(M, H) computes the core sha1 compression function, where M is |
| 98 | * the next part of the message and H is the intermediate state {H0, |
| 99 | * H1, ...} |
| 100 | * |
| 101 | * this function does not do any of the padding required in the |
| 102 | * complete sha1 function |
| 103 | */ |
| 104 | |
| 105 | void |
| 106 | sha1_core(const uint32_t M[16], uint32_t hash_value[5]); |
| 107 | |
| 108 | #endif /* SHA1_H */ |