Annotation of embedaddon/strongswan/src/libimcv/pts/pts_meas_algo.c, revision 1.1
1.1 ! misho 1: /*
! 2: * Copyright (C) 2011-2014 Andreas Steffen
! 3: * HSR Hochschule fuer Technik Rapperswil
! 4: *
! 5: * This program is free software; you can redistribute it and/or modify it
! 6: * under the terms of the GNU General Public License as published by the
! 7: * Free Software Foundation; either version 2 of the License, or (at your
! 8: * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
! 9: *
! 10: * This program is distributed in the hope that it will be useful, but
! 11: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
! 12: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
! 13: * for more details.
! 14: */
! 15:
! 16: #include "pts_meas_algo.h"
! 17:
! 18: #include <utils/debug.h>
! 19:
! 20: ENUM_BEGIN(pts_meas_algorithm_names, PTS_MEAS_ALGO_NONE, PTS_MEAS_ALGO_NONE,
! 21: "None");
! 22: ENUM_NEXT(pts_meas_algorithm_names, PTS_MEAS_ALGO_SHA384, PTS_MEAS_ALGO_SHA384,
! 23: PTS_MEAS_ALGO_NONE,
! 24: "SHA384");
! 25: ENUM_NEXT(pts_meas_algorithm_names, PTS_MEAS_ALGO_SHA256, PTS_MEAS_ALGO_SHA256,
! 26: PTS_MEAS_ALGO_SHA384,
! 27: "SHA256");
! 28: ENUM_NEXT(pts_meas_algorithm_names, PTS_MEAS_ALGO_SHA1, PTS_MEAS_ALGO_SHA1,
! 29: PTS_MEAS_ALGO_SHA256,
! 30: "SHA1");
! 31: ENUM_END(pts_meas_algorithm_names, PTS_MEAS_ALGO_SHA1);
! 32:
! 33: /**
! 34: * Described in header.
! 35: */
! 36: bool pts_meas_algo_probe(pts_meas_algorithms_t *algorithms)
! 37: {
! 38: enumerator_t *enumerator;
! 39: hash_algorithm_t hash_alg;
! 40: const char *plugin_name;
! 41: char format1[] = " %s PTS measurement algorithm %N[%s] available";
! 42: char format2[] = " %s PTS measurement algorithm %N not available";
! 43:
! 44: *algorithms = 0;
! 45:
! 46: enumerator = lib->crypto->create_hasher_enumerator(lib->crypto);
! 47: while (enumerator->enumerate(enumerator, &hash_alg, &plugin_name))
! 48: {
! 49: if (hash_alg == HASH_SHA1)
! 50: {
! 51: *algorithms |= PTS_MEAS_ALGO_SHA1;
! 52: DBG2(DBG_PTS, format1, "mandatory", hash_algorithm_names, hash_alg,
! 53: plugin_name);
! 54: }
! 55: else if (hash_alg == HASH_SHA256)
! 56: {
! 57: *algorithms |= PTS_MEAS_ALGO_SHA256;
! 58: DBG2(DBG_PTS, format1, "mandatory", hash_algorithm_names, hash_alg,
! 59: plugin_name);
! 60: }
! 61: else if (hash_alg == HASH_SHA384)
! 62: {
! 63: *algorithms |= PTS_MEAS_ALGO_SHA384;
! 64: DBG2(DBG_PTS, format1, "optional ", hash_algorithm_names, hash_alg,
! 65: plugin_name);
! 66: }
! 67: }
! 68: enumerator->destroy(enumerator);
! 69:
! 70: if (!(*algorithms & PTS_MEAS_ALGO_SHA384))
! 71: {
! 72: DBG1(DBG_PTS, format2, "optional ", hash_algorithm_names, HASH_SHA384);
! 73: }
! 74: if ((*algorithms & PTS_MEAS_ALGO_SHA1) &&
! 75: (*algorithms & PTS_MEAS_ALGO_SHA256))
! 76: {
! 77: return TRUE;
! 78: }
! 79: if (!(*algorithms & PTS_MEAS_ALGO_SHA1))
! 80: {
! 81: DBG1(DBG_PTS, format2, "mandatory", hash_algorithm_names, HASH_SHA1);
! 82: }
! 83: if (!(*algorithms & PTS_MEAS_ALGO_SHA256))
! 84: {
! 85: DBG1(DBG_PTS, format2, "mandatory", hash_algorithm_names, HASH_SHA256);
! 86: }
! 87: return FALSE;
! 88: }
! 89:
! 90: /**
! 91: * Described in header.
! 92: */
! 93: bool pts_meas_algo_update(char *hash_alg, pts_meas_algorithms_t *algorithms)
! 94: {
! 95: if (strcaseeq(hash_alg, "sha384") || strcaseeq(hash_alg, "sha2_384"))
! 96: {
! 97: /* nothing to update, all algorithms are supported */
! 98: return TRUE;
! 99: }
! 100: if (strcaseeq(hash_alg, "sha256") || strcaseeq(hash_alg, "sha2_256"))
! 101: {
! 102: /* remove SHA384algorithm */
! 103: *algorithms &= ~PTS_MEAS_ALGO_SHA384;
! 104: return TRUE;
! 105: }
! 106: if (strcaseeq(hash_alg, "sha1"))
! 107: {
! 108: /* remove SHA384 and SHA256 algorithms */
! 109: *algorithms &= ~(PTS_MEAS_ALGO_SHA384 | PTS_MEAS_ALGO_SHA256);
! 110: return TRUE;
! 111: }
! 112: DBG1(DBG_PTS, "unknown hash algorithm '%s' configured", hash_alg);
! 113: return FALSE;
! 114: }
! 115:
! 116: /**
! 117: * Described in header.
! 118: */
! 119: pts_meas_algorithms_t pts_meas_algo_select(pts_meas_algorithms_t supported_algos,
! 120: pts_meas_algorithms_t offered_algos)
! 121: {
! 122: if ((supported_algos & PTS_MEAS_ALGO_SHA384) &&
! 123: (offered_algos & PTS_MEAS_ALGO_SHA384))
! 124: {
! 125: return PTS_MEAS_ALGO_SHA384;
! 126: }
! 127: if ((supported_algos & PTS_MEAS_ALGO_SHA256) &&
! 128: (offered_algos & PTS_MEAS_ALGO_SHA256))
! 129: {
! 130: return PTS_MEAS_ALGO_SHA256;
! 131: }
! 132: if ((supported_algos & PTS_MEAS_ALGO_SHA1) &&
! 133: (offered_algos & PTS_MEAS_ALGO_SHA1))
! 134: {
! 135: return PTS_MEAS_ALGO_SHA1;
! 136: }
! 137: return PTS_MEAS_ALGO_NONE;
! 138: }
! 139:
! 140: /**
! 141: * Described in header.
! 142: */
! 143: hash_algorithm_t pts_meas_algo_to_hash(pts_meas_algorithms_t algorithm)
! 144: {
! 145: switch (algorithm)
! 146: {
! 147: case PTS_MEAS_ALGO_SHA1:
! 148: return HASH_SHA1;
! 149: case PTS_MEAS_ALGO_SHA256:
! 150: return HASH_SHA256;
! 151: case PTS_MEAS_ALGO_SHA384:
! 152: return HASH_SHA384;
! 153: default:
! 154: return HASH_UNKNOWN;
! 155: }
! 156: }
! 157:
! 158: /**
! 159: * Described in header.
! 160: */
! 161: pts_meas_algorithms_t pts_meas_algo_from_hash(hash_algorithm_t algorithm)
! 162: {
! 163: switch (algorithm)
! 164: {
! 165: case HASH_SHA1:
! 166: return PTS_MEAS_ALGO_SHA1;
! 167: case HASH_SHA256:
! 168: return PTS_MEAS_ALGO_SHA256;
! 169: case HASH_SHA384:
! 170: return PTS_MEAS_ALGO_SHA384;
! 171: default:
! 172: return PTS_MEAS_ALGO_NONE;
! 173: }
! 174: }
! 175:
! 176: /**
! 177: * Described in header.
! 178: */
! 179: size_t pts_meas_algo_hash_size(pts_meas_algorithms_t algorithm)
! 180: {
! 181: switch (algorithm)
! 182: {
! 183: case PTS_MEAS_ALGO_SHA1:
! 184: return HASH_SIZE_SHA1;
! 185: case PTS_MEAS_ALGO_SHA256:
! 186: return HASH_SIZE_SHA256;
! 187: case PTS_MEAS_ALGO_SHA384:
! 188: return HASH_SIZE_SHA384;
! 189: case PTS_MEAS_ALGO_NONE:
! 190: default:
! 191: return 0;
! 192: }
! 193: }
! 194:
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