/* crypto interfaces * Copyright (C) 1998-2001 D. Hugh Redelmeier * Copyright (C) 2007 Andreas Steffen * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. See . * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * RCSID $Id: crypto.c 3252 2007-10-06 21:24:50Z andreas $ */ #include #include #include #include #include #define HEADER_DES_LOCL_H /* stupid trick to force prototype decl in */ #include #include #include "constants.h" #include "defs.h" #include "state.h" #include "log.h" #include "md5.h" #include "sha1.h" #include "crypto.h" /* requires sha1.h and md5.h */ #include "alg_info.h" #include "ike_alg.h" /* moduli and generator. */ static MP_INT modp1024_modulus, modp1536_modulus, modp2048_modulus, modp3072_modulus, modp4096_modulus, modp6144_modulus, modp8192_modulus; MP_INT groupgenerator; /* MODP group generator (2) */ static void do_3des(u_int8_t *buf, size_t buf_len, u_int8_t *key, size_t key_size, u_int8_t *iv, bool enc); static struct encrypt_desc crypto_encryptor_3des = { algo_type: IKE_ALG_ENCRYPT, algo_id: OAKLEY_3DES_CBC, algo_next: NULL, enc_ctxsize: sizeof(des_key_schedule) * 3, enc_blocksize: DES_CBC_BLOCK_SIZE, keydeflen: DES_CBC_BLOCK_SIZE * 3 * BITS_PER_BYTE, keyminlen: DES_CBC_BLOCK_SIZE * 3 * BITS_PER_BYTE, keymaxlen: DES_CBC_BLOCK_SIZE * 3 * BITS_PER_BYTE, do_crypt: do_3des, }; /* MD5 hash test vectors * from RFC 1321 "MD5 Message-Digest Algorithm" * April 1992, R. Rivest, RSA Data Security */ static const u_char md5_test0_msg[] = { }; static const u_char md5_test0_msg_digest[] = { 0xd4, 0x1d, 0x8c, 0xd9, 0x8f, 0x00, 0xb2, 0x04, 0xe9, 0x80, 0x09, 0x98, 0xec, 0xf8, 0x42, 0x7e }; static const u_char md5_test1_msg[] = { 0x61 }; static const u_char md5_test1_msg_digest[] = { 0x0c, 0xc1, 0x75, 0xb9, 0xc0, 0xf1, 0xb6, 0xa8, 0x31, 0xc3, 0x99, 0xe2, 0x69, 0x77, 0x26, 0x61 }; static const u_char md5_test2_msg[] = { 0x61, 0x62, 0x63 }; static const u_char md5_test2_msg_digest[] = { 0x90, 0x01, 0x50, 0x98, 0x3c, 0xd2, 0x4f, 0xb0, 0xd6, 0x96, 0x3f, 0x7d, 0x28, 0xe1, 0x7f, 0x72 }; static const u_char md5_test3_msg[] = { 0x6d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x20, 0x64, 0x69, 0x67, 0x65, 0x73, 0x74 }; static const u_char md5_test3_msg_digest[] = { 0xf9, 0x6b, 0x69, 0x7d, 0x7c, 0xb7, 0x93, 0x8d, 0x52, 0x5a, 0x2f, 0x31, 0xaa, 0xf1, 0x61, 0xd0 }; static const u_char md5_test4_msg[] = { 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a }; static const u_char md5_test4_msg_digest[] = { 0xc3, 0xfc, 0xd3, 0xd7, 0x61, 0x92, 0xe4, 0x00, 0x7d, 0xfb, 0x49, 0x6c, 0xca, 0x67, 0xe1, 0x3b }; static const u_char md5_test5_msg[] = { 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 }; static const u_char md5_test5_msg_digest[] = { 0xd1, 0x74, 0xab, 0x98, 0xd2, 0x77, 0xd9, 0xf5, 0xa5, 0x61, 0x1c, 0x2c, 0x9f, 0x41, 0x9d, 0x9f }; static const u_char md5_test6_msg[] = { 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x30 }; static const u_char md5_test6_msg_digest[] = { 0x57, 0xed, 0xf4, 0xa2, 0x2b, 0xe3, 0xc9, 0x55, 0xac, 0x49, 0xda, 0x2e, 0x21, 0x07, 0xb6, 0x7a }; static const hash_testvector_t md5_hash_testvectors[] = { { sizeof(md5_test0_msg), md5_test0_msg, md5_test0_msg_digest }, { sizeof(md5_test1_msg), md5_test1_msg, md5_test1_msg_digest }, { sizeof(md5_test2_msg), md5_test2_msg, md5_test2_msg_digest }, { sizeof(md5_test3_msg), md5_test3_msg, md5_test3_msg_digest }, { sizeof(md5_test4_msg), md5_test4_msg, md5_test4_msg_digest }, { sizeof(md5_test5_msg), md5_test5_msg, md5_test5_msg_digest }, { sizeof(md5_test6_msg), md5_test6_msg, md5_test6_msg_digest }, { 0, NULL, NULL } }; /* MD5 hmac test vectors * from RFC 2202 "Test Cases for HMAC-MD5 and HMAC-SHA-1" * September 1997, P. Cheng, IBM & R. Glenn, NIST */ static const u_char md5_hmac1_key[] = { 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b }; static const u_char md5_hmac1_msg[] = { 0x48, 0x69, 0x20, 0x54, 0x68, 0x65, 0x72, 0x65 }; static const u_char md5_hmac1[] = { 0x92, 0x94, 0x72, 0x7a, 0x36, 0x38, 0xbb, 0x1c, 0x13, 0xf4, 0x8e, 0xf8, 0x15, 0x8b, 0xfc, 0x9d }; static const u_char md5_hmac2_key[] = { 0x4a, 0x65, 0x66, 0x65 }; static const u_char md5_hmac2_msg[] = { 0x77, 0x68, 0x61, 0x74, 0x20, 0x64, 0x6f, 0x20, 0x79, 0x61, 0x20, 0x77, 0x61, 0x6e, 0x74, 0x20, 0x66, 0x6f, 0x72, 0x20, 0x6e, 0x6f, 0x74, 0x68, 0x69, 0x6e, 0x67, 0x3f }; static const u_char md5_hmac2[] = { 0x75, 0x0c, 0x78, 0x3e, 0x6a, 0xb0, 0xb5, 0x03, 0xea, 0xa8, 0x6e, 0x31, 0x0a, 0x5d, 0xb7, 0x38 }; static const u_char md5_hmac3_key[] = { 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa }; static const u_char md5_hmac3_msg[] = { 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd, 0xdd }; static const u_char md5_hmac3[] = { 0x56, 0xbe, 0x34, 0x52, 0x1d, 0x14, 0x4c, 0x88, 0xdb, 0xb8, 0xc7, 0x33, 0xf0, 0xe8, 0xb3, 0xf6 }; static const u_char md5_hmac4_key[] = { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19 }; static const u_char md5_hmac4_msg[] = { 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd, 0xcd }; static const u_char md5_hmac4[] = { 0x69, 0x7e, 0xaf, 0x0a, 0xca, 0x3a, 0x3a, 0xea, 0x3a, 0x75, 0x16, 0x47, 0x46, 0xff, 0xaa, 0x79 }; static const u_char md5_hmac6_key[] = { 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, }; static const u_char md5_hmac6_msg[] = { 0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x69, 0x6e, 0x67, 0x20, 0x4c, 0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x54, 0x68, 0x61, 0x6e, 0x20, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x53, 0x69, 0x7a, 0x65, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x2d, 0x20, 0x48, 0x61, 0x73, 0x68, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x46, 0x69, 0x72, 0x73, 0x74 }; static const u_char md5_hmac6[] = { 0x6b, 0x1a, 0xb7, 0xfe, 0x4b, 0xd7, 0xbf, 0x8f, 0x0b, 0x62, 0xe6, 0xce, 0x61, 0xb9, 0xd0, 0xcd }; static const u_char md5_hmac7_msg[] = { 0x54, 0x65, 0x73, 0x74, 0x20, 0x55, 0x73, 0x69, 0x6e, 0x67, 0x20, 0x4c, 0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x54, 0x68, 0x61, 0x6e, 0x20, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x53, 0x69, 0x7a, 0x65, 0x20, 0x4b, 0x65, 0x79, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x4c, 0x61, 0x72, 0x67, 0x65, 0x72, 0x20, 0x54, 0x68, 0x61, 0x6e, 0x20, 0x4f, 0x6e, 0x65, 0x20, 0x42, 0x6c, 0x6f, 0x63, 0x6b, 0x2d, 0x53, 0x69, 0x7a, 0x65, 0x20, 0x44, 0x61, 0x74, 0x61 }; static const u_char md5_hmac7[] = { 0x6f, 0x63, 0x0f, 0xad, 0x67, 0xcd, 0xa0, 0xee, 0x1f, 0xb1, 0xf5, 0x62, 0xdb, 0x3a, 0xa5, 0x3e }; static const hmac_testvector_t md5_hmac_testvectors[] = { { sizeof(md5_hmac1_key), md5_hmac1_key, sizeof(md5_hmac1_msg), md5_hmac1_msg, md5_hmac1 }, { sizeof(md5_hmac2_key), md5_hmac2_key, sizeof(md5_hmac2_msg), md5_hmac2_msg, md5_hmac2 }, { sizeof(md5_hmac3_key), md5_hmac3_key, sizeof(md5_hmac3_msg), md5_hmac3_msg, md5_hmac3 }, { sizeof(md5_hmac4_key), md5_hmac4_key, sizeof(md5_hmac4_msg), md5_hmac4_msg, md5_hmac4 }, { sizeof(md5_hmac6_key), md5_hmac6_key, sizeof(md5_hmac6_msg), md5_hmac6_msg, md5_hmac6 }, { sizeof(md5_hmac6_key), md5_hmac6_key, sizeof(md5_hmac7_msg), md5_hmac7_msg, md5_hmac7 }, { 0, NULL, 0, NULL, NULL } }; static struct hash_desc crypto_hasher_md5 = { algo_type: IKE_ALG_HASH, algo_id: OAKLEY_MD5, algo_next: NULL, hash_ctx_size: sizeof(MD5_CTX), hash_block_size: MD5_BLOCK_SIZE, hash_digest_size: MD5_DIGEST_SIZE, hash_testvectors: md5_hash_testvectors, hmac_testvectors: md5_hmac_testvectors, hash_init: (void (*)(void *)) MD5Init, hash_update: (void (*)(void *, const u_int8_t *, size_t)) MD5Update, hash_final: (void (*)(u_char *, void *)) MD5Final }; /* SHA-1 test vectors * from "The Secure Hash Algorithm Validation System (SHAVS)" * July 22, 2004, Lawrence E. Bassham III, NIST */ static const u_char sha1_short2_msg[] = { 0x5e }; static const u_char sha1_short2_msg_digest[] = { 0x5e, 0x6f, 0x80, 0xa3, 0x4a, 0x97, 0x98, 0xca, 0xfc, 0x6a, 0x5d, 0xb9, 0x6c, 0xc5, 0x7b, 0xa4, 0xc4, 0xdb, 0x59, 0xc2 }; static const u_char sha1_short4_msg[] = { 0x9a, 0x7d, 0xfd, 0xf1, 0xec, 0xea, 0xd0, 0x6e, 0xd6, 0x46, 0xaa, 0x55, 0xfe, 0x75, 0x71, 0x46 }; static const u_char sha1_short4_msg_digest[] = { 0x82, 0xab, 0xff, 0x66, 0x05, 0xdb, 0xe1, 0xc1, 0x7d, 0xef, 0x12, 0xa3, 0x94, 0xfa, 0x22, 0xa8, 0x2b, 0x54, 0x4a, 0x35 }; static const u_char sha1_long2_msg[] = { 0xf7, 0x8f, 0x92, 0x14, 0x1b, 0xcd, 0x17, 0x0a, 0xe8, 0x9b, 0x4f, 0xba, 0x15, 0xa1, 0xd5, 0x9f, 0x3f, 0xd8, 0x4d, 0x22, 0x3c, 0x92, 0x51, 0xbd, 0xac, 0xbb, 0xae, 0x61, 0xd0, 0x5e, 0xd1, 0x15, 0xa0, 0x6a, 0x7c, 0xe1, 0x17, 0xb7, 0xbe, 0xea, 0xd2, 0x44, 0x21, 0xde, 0xd9, 0xc3, 0x25, 0x92, 0xbd, 0x57, 0xed, 0xea, 0xe3, 0x9c, 0x39, 0xfa, 0x1f, 0xe8, 0x94, 0x6a, 0x84, 0xd0, 0xcf, 0x1f, 0x7b, 0xee, 0xad, 0x17, 0x13, 0xe2, 0xe0, 0x95, 0x98, 0x97, 0x34, 0x7f, 0x67, 0xc8, 0x0b, 0x04, 0x00, 0xc2, 0x09, 0x81, 0x5d, 0x6b, 0x10, 0xa6, 0x83, 0x83, 0x6f, 0xd5, 0x56, 0x2a, 0x56, 0xca, 0xb1, 0xa2, 0x8e, 0x81, 0xb6, 0x57, 0x66, 0x54, 0x63, 0x1c, 0xf1, 0x65, 0x66, 0xb8, 0x6e, 0x3b, 0x33, 0xa1, 0x08, 0xb0, 0x53, 0x07, 0xc0, 0x0a, 0xff, 0x14, 0xa7, 0x68, 0xed, 0x73, 0x50, 0x60, 0x6a, 0x0f, 0x85, 0xe6, 0xa9, 0x1d, 0x39, 0x6f, 0x5b, 0x5c, 0xbe, 0x57, 0x7f, 0x9b, 0x38, 0x80, 0x7c, 0x7d, 0x52, 0x3d, 0x6d, 0x79, 0x2f, 0x6e, 0xbc, 0x24, 0xa4, 0xec, 0xf2, 0xb3, 0xa4, 0x27, 0xcd, 0xbb, 0xfb }; static const u_char sha1_long2_msg_digest[] = { 0xcb, 0x00, 0x82, 0xc8, 0xf1, 0x97, 0xd2, 0x60, 0x99, 0x1b, 0xa6, 0xa4, 0x60, 0xe7, 0x6e, 0x20, 0x2b, 0xad, 0x27, 0xb3 }; static const hash_testvector_t sha1_hash_testvectors[] = { { sizeof(sha1_short2_msg), sha1_short2_msg, sha1_short2_msg_digest }, { sizeof(sha1_short4_msg), sha1_short4_msg, sha1_short4_msg_digest }, { sizeof(sha1_long2_msg), sha1_long2_msg, sha1_long2_msg_digest }, { 0, NULL, NULL } }; /* SHA-1 hmac test vectors * from RFC 2202 "Test Cases for HMAC-MD5 and HMAC-SHA-1" * September 1997, P. Cheng, IBM & R. Glenn, NIST */ static const u_char sha1_hmac1_key[] = { 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b, 0x0b }; static const u_char sha1_hmac1[] = { 0xb6, 0x17, 0x31, 0x86, 0x55, 0x05, 0x72, 0x64, 0xe2, 0x8b, 0xc0, 0xb6, 0xfb, 0x37, 0x8c, 0x8e, 0xf1, 0x46, 0xbe, 0x00 }; static const u_char sha1_hmac2[] = { 0xef, 0xfc, 0xdf, 0x6a, 0xe5, 0xeb, 0x2f, 0xa2, 0xd2, 0x74, 0x16, 0xd5, 0xf1, 0x84, 0xdf, 0x9c, 0x25, 0x9a, 0x7c, 0x79 }; static const u_char sha1_hmac3_key[] = { 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa }; static const u_char sha1_hmac3[] = { 0x12, 0x5d, 0x73, 0x42, 0xb9, 0xac, 0x11, 0xcd, 0x91, 0xa3, 0x9a, 0xf4, 0x8a, 0xa1, 0x7b, 0x4f, 0x63, 0xf1, 0x75, 0xd3 }; static const u_char sha1_hmac4[] = { 0x4c, 0x90, 0x07, 0xf4, 0x02, 0x62, 0x50, 0xc6, 0xbc, 0x84, 0x14, 0xf9, 0xbf, 0x50, 0xc8, 0x6c, 0x2d, 0x72, 0x35, 0xda }; static const u_char sha1_hmac6[] = { 0xaa, 0x4a, 0xe5, 0xe1, 0x52, 0x72, 0xd0, 0x0e, 0x95, 0x70, 0x56, 0x37, 0xce, 0x8a, 0x3b, 0x55, 0xed, 0x40, 0x21, 0x12 }; static const u_char sha1_hmac7[] = { 0xe8, 0xe9, 0x9d, 0x0f, 0x45, 0x23, 0x7d, 0x78, 0x6d, 0x6b, 0xba, 0xa7, 0x96, 0x5c, 0x78, 0x08, 0xbb, 0xff, 0x1a, 0x91 }; static const hmac_testvector_t sha1_hmac_testvectors[] = { { sizeof(sha1_hmac1_key), sha1_hmac1_key, sizeof(md5_hmac1_msg), md5_hmac1_msg, sha1_hmac1 }, { sizeof(md5_hmac2_key), md5_hmac2_key, sizeof(md5_hmac2_msg), md5_hmac2_msg, sha1_hmac2 }, { sizeof(sha1_hmac3_key), sha1_hmac3_key, sizeof(md5_hmac3_msg), md5_hmac3_msg, sha1_hmac3 }, { sizeof(md5_hmac4_key), md5_hmac4_key, sizeof(md5_hmac4_msg), md5_hmac4_msg, sha1_hmac4 }, { sizeof(md5_hmac6_key), md5_hmac6_key, sizeof(md5_hmac6_msg), md5_hmac6_msg, sha1_hmac6 }, { sizeof(md5_hmac6_key), md5_hmac6_key, sizeof(md5_hmac7_msg), md5_hmac7_msg, sha1_hmac7 }, { 0, NULL, 0, NULL, NULL } }; static struct hash_desc crypto_hasher_sha1 = { algo_type: IKE_ALG_HASH, algo_id: OAKLEY_SHA, algo_next: NULL, hash_ctx_size: sizeof(SHA1_CTX), hash_block_size: SHA1_BLOCK_SIZE, hash_digest_size: SHA1_DIGEST_SIZE, hash_testvectors: sha1_hash_testvectors, hmac_testvectors: sha1_hmac_testvectors, hash_init: (void (*)(void *)) SHA1Init, hash_update: (void (*)(void *, const u_int8_t *, size_t)) SHA1Update, hash_final: (void (*)(u_char *, void *)) SHA1Final }; void init_crypto(void) { if (mpz_init_set_str(&groupgenerator, MODP_GENERATOR, 10) != 0 || mpz_init_set_str(&modp1024_modulus, MODP1024_MODULUS, 16) != 0 || mpz_init_set_str(&modp1536_modulus, MODP1536_MODULUS, 16) != 0 || mpz_init_set_str(&modp2048_modulus, MODP2048_MODULUS, 16) != 0 || mpz_init_set_str(&modp3072_modulus, MODP3072_MODULUS, 16) != 0 || mpz_init_set_str(&modp4096_modulus, MODP4096_MODULUS, 16) != 0 || mpz_init_set_str(&modp6144_modulus, MODP6144_MODULUS, 16) != 0 || mpz_init_set_str(&modp8192_modulus, MODP8192_MODULUS, 16) != 0) exit_log("mpz_init_set_str() failed in init_crypto()"); ike_alg_add((struct ike_alg *) &crypto_encryptor_3des); ike_alg_add((struct ike_alg *) &crypto_hasher_sha1); ike_alg_add((struct ike_alg *) &crypto_hasher_md5); ike_alg_init(); ike_alg_test(); } /* Oakley group description * * See RFC2409 "The Internet key exchange (IKE)" 6. */ const struct oakley_group_desc unset_group = {0, NULL, 0}; /* magic signifier */ const struct oakley_group_desc oakley_group[OAKLEY_GROUP_SIZE] = { # define BYTES(bits) (((bits) + BITS_PER_BYTE - 1) / BITS_PER_BYTE) { OAKLEY_GROUP_MODP1024, &modp1024_modulus, BYTES(1024) }, { OAKLEY_GROUP_MODP1536, &modp1536_modulus, BYTES(1536) }, { OAKLEY_GROUP_MODP2048, &modp2048_modulus, BYTES(2048) }, { OAKLEY_GROUP_MODP3072, &modp3072_modulus, BYTES(3072) }, { OAKLEY_GROUP_MODP4096, &modp4096_modulus, BYTES(4096) }, { OAKLEY_GROUP_MODP6144, &modp6144_modulus, BYTES(6144) }, { OAKLEY_GROUP_MODP8192, &modp8192_modulus, BYTES(8192) }, # undef BYTES }; const struct oakley_group_desc * lookup_group(u_int16_t group) { int i; for (i = 0; i != elemsof(oakley_group); i++) if (group == oakley_group[i].group) return &oakley_group[i]; return NULL; } /* Encryption Routines * * Each uses and updates the state object's st_new_iv. * This must already be initialized. */ /* encrypt or decrypt part of an IKE message using DES * See RFC 2409 "IKE" Appendix B */ static void __attribute__ ((unused)) do_des(bool enc, void *buf, size_t buf_len, struct state *st) { des_key_schedule ks; (void) des_set_key((des_cblock *)st->st_enc_key.ptr, ks); passert(st->st_new_iv_len >= DES_CBC_BLOCK_SIZE); st->st_new_iv_len = DES_CBC_BLOCK_SIZE; /* truncate */ des_ncbc_encrypt((des_cblock *)buf, (des_cblock *)buf, buf_len, ks, (des_cblock *)st->st_new_iv, enc); } /* encrypt or decrypt part of an IKE message using 3DES * See RFC 2409 "IKE" Appendix B */ static void do_3des(u_int8_t *buf, size_t buf_len, u_int8_t *key, size_t key_size, u_int8_t *iv, bool enc) { des_key_schedule ks[3]; passert (!key_size || (key_size==(DES_CBC_BLOCK_SIZE * 3))) (void) des_set_key((des_cblock *)key + 0, ks[0]); (void) des_set_key((des_cblock *)key + 1, ks[1]); (void) des_set_key((des_cblock *)key + 2, ks[2]); des_ede3_cbc_encrypt((des_cblock *)buf, (des_cblock *)buf, buf_len, ks[0], ks[1], ks[2], (des_cblock *)iv, enc); } /* hash and prf routines */ void crypto_cbc_encrypt(const struct encrypt_desc *e, bool enc, u_int8_t *buf, size_t size, struct state *st) { passert(st->st_new_iv_len >= e->enc_blocksize); st->st_new_iv_len = e->enc_blocksize; /* truncate */ e->do_crypt(buf, size, st->st_enc_key.ptr, st->st_enc_key.len, st->st_new_iv, enc); /* e->set_key(&ctx, st->st_enc_key.ptr, st->st_enc_key.len); e->cbc_crypt(&ctx, buf, size, st->st_new_iv, enc); */ } /* HMAC package * rfc2104.txt specifies how HMAC works. */ void hmac_init(struct hmac_ctx *ctx, const struct hash_desc *h, const u_char *key, size_t key_len) { int k; ctx->h = h; ctx->hmac_digest_size = h->hash_digest_size; /* Prepare the two pads for the HMAC */ memset(ctx->buf1, '\0', h->hash_block_size); if (key_len <= h->hash_block_size) { memcpy(ctx->buf1, key, key_len); } else { h->hash_init(&ctx->hash_ctx); h->hash_update(&ctx->hash_ctx, key, key_len); h->hash_final(ctx->buf1, &ctx->hash_ctx); } memcpy(ctx->buf2, ctx->buf1, h->hash_block_size); for (k = 0; k < h->hash_block_size; k++) { ctx->buf1[k] ^= HMAC_IPAD; ctx->buf2[k] ^= HMAC_OPAD; } hmac_reinit(ctx); } void hmac_reinit(struct hmac_ctx *ctx) { ctx->h->hash_init(&ctx->hash_ctx); ctx->h->hash_update(&ctx->hash_ctx, ctx->buf1, ctx->h->hash_block_size); } void hmac_update(struct hmac_ctx *ctx, const u_char *data, size_t data_len) { ctx->h->hash_update(&ctx->hash_ctx, data, data_len); } void hmac_final(u_char *output, struct hmac_ctx *ctx) { const struct hash_desc *h = ctx->h; h->hash_final(output, &ctx->hash_ctx); h->hash_init(&ctx->hash_ctx); h->hash_update(&ctx->hash_ctx, ctx->buf2, h->hash_block_size); h->hash_update(&ctx->hash_ctx, output, h->hash_digest_size); h->hash_final(output, &ctx->hash_ctx); }