1 /* -*- mode: c; c-basic-offset: 4; indent-tabs-mode: nil -*- */ 2 /* plugins/preauth/pkinit/pkinit_kdf_test.c */ 3 /* 4 * Copyright (C) 2011 by the Massachusetts Institute of Technology. 5 * All rights reserved. 6 * 7 * Export of this software from the United States of America may 8 * require a specific license from the United States Government. 9 * It is the responsibility of any person or organization contemplating 10 * export to obtain such a license before exporting. 11 * 12 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 13 * distribute this software and its documentation for any purpose and 14 * without fee is hereby granted, provided that the above copyright 15 * notice appear in all copies and that both that copyright notice and 16 * this permission notice appear in supporting documentation, and that 17 * the name of M.I.T. not be used in advertising or publicity pertaining 18 * to distribution of the software without specific, written prior 19 * permission. Furthermore if you modify this software you must label 20 * your software as modified software and not distribute it in such a 21 * fashion that it might be confused with the original M.I.T. software. 22 * M.I.T. makes no representations about the suitability of 23 * this software for any purpose. It is provided "as is" without express 24 * or implied warranty. 25 */ 26 27 /* Verify the correctness of pkinit_kdf() in pkinit_crypto_openssl, which 28 * implements the key derivation function from RFC 8636. */ 29 30 #include "k5-platform.h" 31 #include "pkinit.h" 32 33 /** 34 * Initialize a krb5_data from @a s, a constant string. Note @a s is evaluated 35 * multiple times; this is acceptable for constants. 36 */ 37 #define DATA_FROM_STRING(s) \ 38 {0, sizeof(s)-1, (char *) s} 39 40 41 /* values from test vectors in the pkinit-alg-agility draft */ 42 int secret_len = 256; 43 char twenty_as[10]; 44 char eighteen_bs[9]; 45 char party_u_name[] = "lha@SU.SE"; 46 char party_v_name[] = "krbtgt/SU.SE@SU.SE"; 47 int enctype_aes = ENCTYPE_AES256_CTS_HMAC_SHA1_96; 48 int enctype_des3 = ENCTYPE_DES3_CBC_SHA1; 49 const krb5_data lha_data = DATA_FROM_STRING("lha"); 50 51 krb5_octet key1_hex[] = 52 {0xe6, 0xAB, 0x38, 0xC9, 0x41, 0x3E, 0x03, 0x5B, 53 0xB0, 0x79, 0x20, 0x1E, 0xD0, 0xB6, 0xB7, 0x3D, 54 0x8D, 0x49, 0xA8, 0x14, 0xA7, 0x37, 0xC0, 0x4E, 55 0xE6, 0x64, 0x96, 0x14, 0x20, 0x6F, 0x73, 0xAD}; 56 57 krb5_octet key2_hex[] = 58 {0x77, 0xEF, 0x4E, 0x48, 0xC4, 0x20, 0xAE, 0x3F, 59 0xEC, 0x75, 0x10, 0x9D, 0x79, 0x81, 0x69, 0x7E, 60 0xED, 0x5D, 0x29, 0x5C, 0x90, 0xc6, 0x25, 0x64, 61 0xF7, 0xBF, 0xD1, 0x01, 0xFA, 0x9b, 0xC1, 0xD5}; 62 63 krb5_octet key3_hex[] = 64 {0xD3, 0xC7, 0x8A, 0x79, 0xD6, 0x52, 0x13, 0xEF, 65 0xE9, 0xA8, 0x26, 0xF7, 0x5D, 0xFB, 0x01, 0xF7, 66 0x23, 0x62, 0xFB, 0x16, 0xFB, 0x01, 0xDA, 0xD6}; 67 68 int 69 main(int argc, char **argv) 70 { 71 krb5_context context = 0; 72 krb5_data secret; 73 krb5_algorithm_identifier alg_id; 74 krb5_data as_req; 75 krb5_data pk_as_rep; 76 krb5_keyblock key_block; 77 78 /* other local variables */ 79 int retval = 0; 80 krb5_enctype enctype = 0; 81 krb5_principal u_principal = NULL; 82 krb5_principal v_principal = NULL; 83 84 /* initialize variables that get malloc'ed, so cleanup is safe */ 85 krb5_init_context (&context); 86 memset(&alg_id, 0, sizeof(alg_id)); 87 memset(&as_req, 0, sizeof(as_req)); 88 memset(&pk_as_rep, 0, sizeof(pk_as_rep)); 89 memset(&key_block, 0, sizeof(key_block)); 90 91 /* set up a 256-byte, ALL-ZEROS secret */ 92 if (NULL == (secret.data = malloc(secret_len))) { 93 printf("ERROR in pkinit_kdf_test: Memory allocation failed."); 94 retval = ENOMEM; 95 goto cleanup; 96 } 97 secret.length = secret_len; 98 memset(secret.data, 0, secret_len); 99 100 /* set-up the partyUInfo and partyVInfo principals */ 101 if ((0 != (retval = krb5_parse_name(context, party_u_name, 102 &u_principal))) || 103 (0 != (retval = krb5_parse_name(context, party_v_name, 104 &v_principal)))) { 105 printf("ERROR in pkinit_kdf_test: Error parsing names, retval = %d", 106 retval); 107 goto cleanup; 108 } 109 110 /* The test vectors in RFC 8636 implicitly use NT-PRINCIPAL names. */ 111 u_principal->type = KRB5_NT_PRINCIPAL; 112 v_principal->type = KRB5_NT_PRINCIPAL; 113 114 /* set-up the as_req and and pk_as_rep data */ 115 memset(twenty_as, 0xaa, sizeof(twenty_as)); 116 memset(eighteen_bs, 0xbb, sizeof(eighteen_bs)); 117 as_req.length = sizeof(twenty_as); 118 as_req.data = twenty_as; 119 120 pk_as_rep.length = sizeof(eighteen_bs); 121 pk_as_rep.data = eighteen_bs; 122 123 /* TEST 1: SHA-1/AES */ 124 /* set up algorithm id */ 125 alg_id.algorithm = kdf_sha1_id; 126 127 enctype = enctype_aes; 128 129 retval = pkinit_kdf(context, &secret, &alg_id.algorithm, u_principal, 130 v_principal, enctype, &as_req, &pk_as_rep, &key_block); 131 if (retval) { 132 printf("ERROR in pkinit_kdf_test: kdf call failed, retval = %d\n", 133 retval); 134 goto cleanup; 135 } 136 137 /* compare key to expected key value */ 138 139 if ((key_block.length == sizeof(key1_hex)) && 140 (0 == memcmp(key_block.contents, key1_hex, key_block.length))) { 141 printf("SUCCESS: TEST 1 (SHA-1/AES), Correct key value generated.\n"); 142 retval = 0; 143 /* free the keyblock contents, so we can use it for the next test */ 144 krb5_free_keyblock_contents(context, &key_block); 145 } else { 146 printf("FAILURE: TEST 1 (SHA-1/AES), Incorrect key value generated!\n"); 147 retval = 1; 148 goto cleanup; 149 } 150 151 /* TEST 2: SHA-256/AES */ 152 /* set up algorithm id */ 153 alg_id.algorithm = kdf_sha256_id; 154 155 enctype = enctype_aes; 156 157 retval = pkinit_kdf(context, &secret, &alg_id.algorithm, u_principal, 158 v_principal, enctype, &as_req, &pk_as_rep, &key_block); 159 if (retval) { 160 printf("ERROR in pkinit_kdf_test: kdf call failed, retval = %d\n", 161 retval); 162 goto cleanup; 163 } 164 165 /* compare key to expected key value */ 166 167 if ((key_block.length == sizeof(key2_hex)) && 168 (0 == memcmp(key_block.contents, key2_hex, key_block.length))) { 169 printf("SUCCESS: TEST 2 (SHA-256/AES), Correct key value generated.\n"); 170 retval = 0; 171 /* free the keyblock contents, so we can use it for the next test */ 172 krb5_free_keyblock_contents(context, &key_block); 173 } else { 174 printf("FAILURE: TEST 2 (SHA-256/AES), Incorrect key value generated!\n"); 175 retval = 1; 176 goto cleanup; 177 } 178 179 /* TEST 3: SHA-512/DES3 */ 180 /* set up algorithm id */ 181 alg_id.algorithm = kdf_sha512_id; 182 183 enctype = enctype_des3; 184 185 retval = pkinit_kdf(context, &secret, &alg_id.algorithm, u_principal, 186 v_principal, enctype, &as_req, &pk_as_rep, &key_block); 187 if (retval) { 188 printf("ERROR in pkinit_kdf_test: kdf call failed, retval = %d\n", 189 retval); 190 goto cleanup; 191 } 192 193 /* compare key to expected key value */ 194 195 if ((key_block.length == sizeof(key3_hex)) && 196 (0 == memcmp(key_block.contents, key3_hex, key_block.length))) { 197 printf("SUCCESS: TEST 3 (SHA-512/DES3), Correct key value generated.\n"); 198 retval = 0; 199 } else { 200 printf("FAILURE: TEST 2 (SHA-512/DES3), Incorrect key value generated!\n"); 201 retval = 1; 202 goto cleanup; 203 } 204 205 cleanup: 206 /* release all allocated resources, whether good or bad return */ 207 free(secret.data); 208 krb5_free_principal(context, u_principal); 209 krb5_free_principal(context, v_principal); 210 krb5_free_keyblock_contents(context, &key_block); 211 krb5_free_context(context); 212 return retval ? 1 : 0; 213 } 214