[331] | 1 | /***************************************************************************
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| 2 | * _ _ ____ _
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| 3 | * Project ___| | | | _ \| |
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| 4 | * / __| | | | |_) | |
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| 5 | * | (__| |_| | _ <| |___
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| 6 | * \___|\___/|_| \_\_____|
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| 7 | *
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| 8 | * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
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| 9 | *
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| 10 | * This software is licensed as described in the file COPYING, which
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| 11 | * you should have received as part of this distribution. The terms
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| 12 | * are also available at https://curl.haxx.se/docs/copyright.html.
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| 13 | *
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| 14 | * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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| 15 | * copies of the Software, and permit persons to whom the Software is
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| 16 | * furnished to do so, under the terms of the COPYING file.
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| 17 | *
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| 18 | * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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| 19 | * KIND, either express or implied.
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| 20 | *
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| 21 | ***************************************************************************/
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| 22 |
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| 23 | #include "curl_setup.h"
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| 24 |
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| 25 | #if defined(USE_NTLM) && !defined(USE_WINDOWS_SSPI)
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| 26 |
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| 27 | /*
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| 28 | * NTLM details:
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| 29 | *
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| 30 | * https://davenport.sourceforge.io/ntlm.html
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| 31 | * https://www.innovation.ch/java/ntlm.html
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| 32 | */
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| 33 |
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| 34 | #define DEBUG_ME 0
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| 35 |
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| 36 | #include "urldata.h"
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| 37 | #include "non-ascii.h"
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| 38 | #include "sendf.h"
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| 39 | #include "curl_base64.h"
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| 40 | #include "curl_ntlm_core.h"
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| 41 | #include "curl_gethostname.h"
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| 42 | #include "curl_multibyte.h"
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| 43 | #include "warnless.h"
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| 44 | #include "rand.h"
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| 45 | #include "vtls/vtls.h"
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| 46 |
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| 47 | /* SSL backend-specific #if branches in this file must be kept in the order
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| 48 | documented in curl_ntlm_core. */
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| 49 | #if defined(NTLM_NEEDS_NSS_INIT)
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| 50 | #include "vtls/nssg.h" /* for Curl_nss_force_init() */
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| 51 | #endif
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| 52 |
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| 53 | #define BUILDING_CURL_NTLM_MSGS_C
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| 54 | #include "vauth/vauth.h"
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| 55 | #include "vauth/ntlm.h"
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| 56 | #include "curl_endian.h"
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| 57 | #include "curl_printf.h"
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| 58 |
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| 59 | /* The last #include files should be: */
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| 60 | #include "curl_memory.h"
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| 61 | #include "memdebug.h"
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| 62 |
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| 63 | /* "NTLMSSP" signature is always in ASCII regardless of the platform */
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| 64 | #define NTLMSSP_SIGNATURE "\x4e\x54\x4c\x4d\x53\x53\x50"
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| 65 |
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| 66 | #define SHORTPAIR(x) ((x) & 0xff), (((x) >> 8) & 0xff)
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| 67 | #define LONGQUARTET(x) ((x) & 0xff), (((x) >> 8) & 0xff), \
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| 68 | (((x) >> 16) & 0xff), (((x) >> 24) & 0xff)
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| 69 |
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| 70 | #if DEBUG_ME
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| 71 | # define DEBUG_OUT(x) x
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| 72 | static void ntlm_print_flags(FILE *handle, unsigned long flags)
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| 73 | {
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| 74 | if(flags & NTLMFLAG_NEGOTIATE_UNICODE)
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| 75 | fprintf(handle, "NTLMFLAG_NEGOTIATE_UNICODE ");
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| 76 | if(flags & NTLMFLAG_NEGOTIATE_OEM)
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| 77 | fprintf(handle, "NTLMFLAG_NEGOTIATE_OEM ");
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| 78 | if(flags & NTLMFLAG_REQUEST_TARGET)
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| 79 | fprintf(handle, "NTLMFLAG_REQUEST_TARGET ");
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| 80 | if(flags & (1<<3))
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| 81 | fprintf(handle, "NTLMFLAG_UNKNOWN_3 ");
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| 82 | if(flags & NTLMFLAG_NEGOTIATE_SIGN)
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| 83 | fprintf(handle, "NTLMFLAG_NEGOTIATE_SIGN ");
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| 84 | if(flags & NTLMFLAG_NEGOTIATE_SEAL)
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| 85 | fprintf(handle, "NTLMFLAG_NEGOTIATE_SEAL ");
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| 86 | if(flags & NTLMFLAG_NEGOTIATE_DATAGRAM_STYLE)
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| 87 | fprintf(handle, "NTLMFLAG_NEGOTIATE_DATAGRAM_STYLE ");
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| 88 | if(flags & NTLMFLAG_NEGOTIATE_LM_KEY)
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| 89 | fprintf(handle, "NTLMFLAG_NEGOTIATE_LM_KEY ");
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| 90 | if(flags & NTLMFLAG_NEGOTIATE_NETWARE)
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| 91 | fprintf(handle, "NTLMFLAG_NEGOTIATE_NETWARE ");
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| 92 | if(flags & NTLMFLAG_NEGOTIATE_NTLM_KEY)
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| 93 | fprintf(handle, "NTLMFLAG_NEGOTIATE_NTLM_KEY ");
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| 94 | if(flags & (1<<10))
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| 95 | fprintf(handle, "NTLMFLAG_UNKNOWN_10 ");
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| 96 | if(flags & NTLMFLAG_NEGOTIATE_ANONYMOUS)
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| 97 | fprintf(handle, "NTLMFLAG_NEGOTIATE_ANONYMOUS ");
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| 98 | if(flags & NTLMFLAG_NEGOTIATE_DOMAIN_SUPPLIED)
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| 99 | fprintf(handle, "NTLMFLAG_NEGOTIATE_DOMAIN_SUPPLIED ");
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| 100 | if(flags & NTLMFLAG_NEGOTIATE_WORKSTATION_SUPPLIED)
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| 101 | fprintf(handle, "NTLMFLAG_NEGOTIATE_WORKSTATION_SUPPLIED ");
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| 102 | if(flags & NTLMFLAG_NEGOTIATE_LOCAL_CALL)
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| 103 | fprintf(handle, "NTLMFLAG_NEGOTIATE_LOCAL_CALL ");
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| 104 | if(flags & NTLMFLAG_NEGOTIATE_ALWAYS_SIGN)
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| 105 | fprintf(handle, "NTLMFLAG_NEGOTIATE_ALWAYS_SIGN ");
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| 106 | if(flags & NTLMFLAG_TARGET_TYPE_DOMAIN)
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| 107 | fprintf(handle, "NTLMFLAG_TARGET_TYPE_DOMAIN ");
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| 108 | if(flags & NTLMFLAG_TARGET_TYPE_SERVER)
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| 109 | fprintf(handle, "NTLMFLAG_TARGET_TYPE_SERVER ");
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| 110 | if(flags & NTLMFLAG_TARGET_TYPE_SHARE)
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| 111 | fprintf(handle, "NTLMFLAG_TARGET_TYPE_SHARE ");
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| 112 | if(flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY)
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| 113 | fprintf(handle, "NTLMFLAG_NEGOTIATE_NTLM2_KEY ");
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| 114 | if(flags & NTLMFLAG_REQUEST_INIT_RESPONSE)
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| 115 | fprintf(handle, "NTLMFLAG_REQUEST_INIT_RESPONSE ");
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| 116 | if(flags & NTLMFLAG_REQUEST_ACCEPT_RESPONSE)
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| 117 | fprintf(handle, "NTLMFLAG_REQUEST_ACCEPT_RESPONSE ");
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| 118 | if(flags & NTLMFLAG_REQUEST_NONNT_SESSION_KEY)
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| 119 | fprintf(handle, "NTLMFLAG_REQUEST_NONNT_SESSION_KEY ");
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| 120 | if(flags & NTLMFLAG_NEGOTIATE_TARGET_INFO)
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| 121 | fprintf(handle, "NTLMFLAG_NEGOTIATE_TARGET_INFO ");
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| 122 | if(flags & (1<<24))
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| 123 | fprintf(handle, "NTLMFLAG_UNKNOWN_24 ");
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| 124 | if(flags & (1<<25))
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| 125 | fprintf(handle, "NTLMFLAG_UNKNOWN_25 ");
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| 126 | if(flags & (1<<26))
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| 127 | fprintf(handle, "NTLMFLAG_UNKNOWN_26 ");
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| 128 | if(flags & (1<<27))
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| 129 | fprintf(handle, "NTLMFLAG_UNKNOWN_27 ");
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| 130 | if(flags & (1<<28))
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| 131 | fprintf(handle, "NTLMFLAG_UNKNOWN_28 ");
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| 132 | if(flags & NTLMFLAG_NEGOTIATE_128)
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| 133 | fprintf(handle, "NTLMFLAG_NEGOTIATE_128 ");
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| 134 | if(flags & NTLMFLAG_NEGOTIATE_KEY_EXCHANGE)
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| 135 | fprintf(handle, "NTLMFLAG_NEGOTIATE_KEY_EXCHANGE ");
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| 136 | if(flags & NTLMFLAG_NEGOTIATE_56)
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| 137 | fprintf(handle, "NTLMFLAG_NEGOTIATE_56 ");
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| 138 | }
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| 139 |
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| 140 | static void ntlm_print_hex(FILE *handle, const char *buf, size_t len)
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| 141 | {
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| 142 | const char *p = buf;
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| 143 |
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| 144 | (void) handle;
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| 145 |
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| 146 | fprintf(stderr, "0x");
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| 147 | while(len-- > 0)
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| 148 | fprintf(stderr, "%02.2x", (unsigned int)*p++);
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| 149 | }
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| 150 | #else
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| 151 | # define DEBUG_OUT(x) Curl_nop_stmt
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| 152 | #endif
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| 153 |
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| 154 | /*
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| 155 | * ntlm_decode_type2_target()
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| 156 | *
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| 157 | * This is used to decode the "target info" in the NTLM type-2 message
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| 158 | * received.
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| 159 | *
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| 160 | * Parameters:
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| 161 | *
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| 162 | * data [in] - The session handle.
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| 163 | * buffer [in] - The decoded type-2 message.
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| 164 | * size [in] - The input buffer size, at least 32 bytes.
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| 165 | * ntlm [in/out] - The NTLM data struct being used and modified.
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| 166 | *
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| 167 | * Returns CURLE_OK on success.
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| 168 | */
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| 169 | static CURLcode ntlm_decode_type2_target(struct Curl_easy *data,
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| 170 | unsigned char *buffer,
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| 171 | size_t size,
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| 172 | struct ntlmdata *ntlm)
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| 173 | {
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| 174 | unsigned short target_info_len = 0;
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| 175 | unsigned int target_info_offset = 0;
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| 176 |
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| 177 | #if defined(CURL_DISABLE_VERBOSE_STRINGS)
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| 178 | (void) data;
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| 179 | #endif
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| 180 |
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| 181 | if(size >= 48) {
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| 182 | target_info_len = Curl_read16_le(&buffer[40]);
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| 183 | target_info_offset = Curl_read32_le(&buffer[44]);
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| 184 | if(target_info_len > 0) {
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| 185 | if(((target_info_offset + target_info_len) > size) ||
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| 186 | (target_info_offset < 48)) {
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| 187 | infof(data, "NTLM handshake failure (bad type-2 message). "
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| 188 | "Target Info Offset Len is set incorrect by the peer\n");
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| 189 | return CURLE_BAD_CONTENT_ENCODING;
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| 190 | }
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| 191 |
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| 192 | ntlm->target_info = malloc(target_info_len);
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| 193 | if(!ntlm->target_info)
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| 194 | return CURLE_OUT_OF_MEMORY;
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| 195 |
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| 196 | memcpy(ntlm->target_info, &buffer[target_info_offset], target_info_len);
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| 197 | }
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| 198 | }
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| 199 |
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| 200 | ntlm->target_info_len = target_info_len;
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| 201 |
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| 202 | return CURLE_OK;
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| 203 | }
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| 204 |
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| 205 | /*
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| 206 | NTLM message structure notes:
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| 207 |
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| 208 | A 'short' is a 'network short', a little-endian 16-bit unsigned value.
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| 209 |
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| 210 | A 'long' is a 'network long', a little-endian, 32-bit unsigned value.
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| 211 |
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| 212 | A 'security buffer' represents a triplet used to point to a buffer,
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| 213 | consisting of two shorts and one long:
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| 214 |
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| 215 | 1. A 'short' containing the length of the buffer content in bytes.
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| 216 | 2. A 'short' containing the allocated space for the buffer in bytes.
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| 217 | 3. A 'long' containing the offset to the start of the buffer in bytes,
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| 218 | from the beginning of the NTLM message.
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| 219 | */
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| 220 |
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| 221 | /*
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| 222 | * Curl_auth_is_ntlm_supported()
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| 223 | *
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| 224 | * This is used to evaluate if NTLM is supported.
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| 225 | *
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| 226 | * Parameters: None
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| 227 | *
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| 228 | * Returns TRUE as NTLM as handled by libcurl.
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| 229 | */
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| 230 | bool Curl_auth_is_ntlm_supported(void)
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| 231 | {
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| 232 | return TRUE;
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| 233 | }
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| 234 |
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| 235 | /*
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| 236 | * Curl_auth_decode_ntlm_type2_message()
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| 237 | *
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| 238 | * This is used to decode an already encoded NTLM type-2 message. The message
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| 239 | * is first decoded from a base64 string into a raw NTLM message and checked
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| 240 | * for validity before the appropriate data for creating a type-3 message is
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| 241 | * written to the given NTLM data structure.
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| 242 | *
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| 243 | * Parameters:
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| 244 | *
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| 245 | * data [in] - The session handle.
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| 246 | * type2msg [in] - The base64 encoded type-2 message.
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| 247 | * ntlm [in/out] - The NTLM data struct being used and modified.
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| 248 | *
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| 249 | * Returns CURLE_OK on success.
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| 250 | */
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| 251 | CURLcode Curl_auth_decode_ntlm_type2_message(struct Curl_easy *data,
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| 252 | const char *type2msg,
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| 253 | struct ntlmdata *ntlm)
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| 254 | {
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| 255 | static const char type2_marker[] = { 0x02, 0x00, 0x00, 0x00 };
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| 256 |
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| 257 | /* NTLM type-2 message structure:
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| 258 |
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| 259 | Index Description Content
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| 260 | 0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
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| 261 | (0x4e544c4d53535000)
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| 262 | 8 NTLM Message Type long (0x02000000)
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| 263 | 12 Target Name security buffer
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| 264 | 20 Flags long
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| 265 | 24 Challenge 8 bytes
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| 266 | (32) Context 8 bytes (two consecutive longs) (*)
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| 267 | (40) Target Information security buffer (*)
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| 268 | (48) OS Version Structure 8 bytes (*)
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| 269 | 32 (48) (56) Start of data block (*)
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| 270 | (*) -> Optional
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| 271 | */
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| 272 |
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| 273 | CURLcode result = CURLE_OK;
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| 274 | unsigned char *type2 = NULL;
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| 275 | size_t type2_len = 0;
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| 276 |
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| 277 | #if defined(NTLM_NEEDS_NSS_INIT)
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| 278 | /* Make sure the crypto backend is initialized */
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| 279 | result = Curl_nss_force_init(data);
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| 280 | if(result)
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| 281 | return result;
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| 282 | #elif defined(CURL_DISABLE_VERBOSE_STRINGS)
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| 283 | (void)data;
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| 284 | #endif
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| 285 |
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| 286 | /* Decode the base-64 encoded type-2 message */
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| 287 | if(strlen(type2msg) && *type2msg != '=') {
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| 288 | result = Curl_base64_decode(type2msg, &type2, &type2_len);
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| 289 | if(result)
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| 290 | return result;
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| 291 | }
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| 292 |
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| 293 | /* Ensure we have a valid type-2 message */
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| 294 | if(!type2) {
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| 295 | infof(data, "NTLM handshake failure (empty type-2 message)\n");
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| 296 | return CURLE_BAD_CONTENT_ENCODING;
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| 297 | }
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| 298 |
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| 299 | ntlm->flags = 0;
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| 300 |
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| 301 | if((type2_len < 32) ||
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| 302 | (memcmp(type2, NTLMSSP_SIGNATURE, 8) != 0) ||
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| 303 | (memcmp(type2 + 8, type2_marker, sizeof(type2_marker)) != 0)) {
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| 304 | /* This was not a good enough type-2 message */
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| 305 | free(type2);
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| 306 | infof(data, "NTLM handshake failure (bad type-2 message)\n");
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| 307 | return CURLE_BAD_CONTENT_ENCODING;
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| 308 | }
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| 309 |
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| 310 | ntlm->flags = Curl_read32_le(&type2[20]);
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| 311 | memcpy(ntlm->nonce, &type2[24], 8);
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| 312 |
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| 313 | if(ntlm->flags & NTLMFLAG_NEGOTIATE_TARGET_INFO) {
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| 314 | result = ntlm_decode_type2_target(data, type2, type2_len, ntlm);
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| 315 | if(result) {
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| 316 | free(type2);
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| 317 | infof(data, "NTLM handshake failure (bad type-2 message)\n");
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| 318 | return result;
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| 319 | }
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| 320 | }
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| 321 |
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| 322 | DEBUG_OUT({
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| 323 | fprintf(stderr, "**** TYPE2 header flags=0x%08.8lx ", ntlm->flags);
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| 324 | ntlm_print_flags(stderr, ntlm->flags);
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| 325 | fprintf(stderr, "\n nonce=");
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| 326 | ntlm_print_hex(stderr, (char *)ntlm->nonce, 8);
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| 327 | fprintf(stderr, "\n****\n");
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| 328 | fprintf(stderr, "**** Header %s\n ", header);
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| 329 | });
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| 330 |
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| 331 | free(type2);
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| 332 |
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| 333 | return result;
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| 334 | }
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| 335 |
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| 336 | /* copy the source to the destination and fill in zeroes in every
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| 337 | other destination byte! */
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| 338 | static void unicodecpy(unsigned char *dest, const char *src, size_t length)
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| 339 | {
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| 340 | size_t i;
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| 341 | for(i = 0; i < length; i++) {
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| 342 | dest[2 * i] = (unsigned char)src[i];
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| 343 | dest[2 * i + 1] = '\0';
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| 344 | }
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| 345 | }
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| 346 |
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| 347 | /*
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| 348 | * Curl_auth_create_ntlm_type1_message()
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| 349 | *
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| 350 | * This is used to generate an already encoded NTLM type-1 message ready for
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| 351 | * sending to the recipient using the appropriate compile time crypto API.
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| 352 | *
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| 353 | * Parameters:
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| 354 | *
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| 355 | * data [in] - The session handle.
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| 356 | * userp [in] - The user name in the format User or Domain\User.
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| 357 | * passdwp [in] - The user's password.
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| 358 | * ntlm [in/out] - The NTLM data struct being used and modified.
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| 359 | * outptr [in/out] - The address where a pointer to newly allocated memory
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| 360 | * holding the result will be stored upon completion.
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| 361 | * outlen [out] - The length of the output message.
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| 362 | *
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| 363 | * Returns CURLE_OK on success.
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| 364 | */
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| 365 | CURLcode Curl_auth_create_ntlm_type1_message(struct Curl_easy *data,
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| 366 | const char *userp,
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| 367 | const char *passwdp,
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| 368 | struct ntlmdata *ntlm,
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| 369 | char **outptr, size_t *outlen)
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| 370 | {
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| 371 | /* NTLM type-1 message structure:
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| 372 |
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| 373 | Index Description Content
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| 374 | 0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
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| 375 | (0x4e544c4d53535000)
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| 376 | 8 NTLM Message Type long (0x01000000)
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| 377 | 12 Flags long
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| 378 | (16) Supplied Domain security buffer (*)
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| 379 | (24) Supplied Workstation security buffer (*)
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| 380 | (32) OS Version Structure 8 bytes (*)
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| 381 | (32) (40) Start of data block (*)
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| 382 | (*) -> Optional
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| 383 | */
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| 384 |
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| 385 | size_t size;
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| 386 |
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| 387 | unsigned char ntlmbuf[NTLM_BUFSIZE];
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| 388 | const char *host = ""; /* empty */
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| 389 | const char *domain = ""; /* empty */
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| 390 | size_t hostlen = 0;
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| 391 | size_t domlen = 0;
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| 392 | size_t hostoff = 0;
|
---|
| 393 | size_t domoff = hostoff + hostlen; /* This is 0: remember that host and
|
---|
| 394 | domain are empty */
|
---|
| 395 | (void)userp;
|
---|
| 396 | (void)passwdp;
|
---|
| 397 |
|
---|
| 398 | /* Clean up any former leftovers and initialise to defaults */
|
---|
| 399 | Curl_auth_ntlm_cleanup(ntlm);
|
---|
| 400 |
|
---|
| 401 | #if defined(USE_NTRESPONSES) && defined(USE_NTLM2SESSION)
|
---|
| 402 | #define NTLM2FLAG NTLMFLAG_NEGOTIATE_NTLM2_KEY
|
---|
| 403 | #else
|
---|
| 404 | #define NTLM2FLAG 0
|
---|
| 405 | #endif
|
---|
| 406 | snprintf((char *)ntlmbuf, NTLM_BUFSIZE,
|
---|
| 407 | NTLMSSP_SIGNATURE "%c"
|
---|
| 408 | "\x01%c%c%c" /* 32-bit type = 1 */
|
---|
| 409 | "%c%c%c%c" /* 32-bit NTLM flag field */
|
---|
| 410 | "%c%c" /* domain length */
|
---|
| 411 | "%c%c" /* domain allocated space */
|
---|
| 412 | "%c%c" /* domain name offset */
|
---|
| 413 | "%c%c" /* 2 zeroes */
|
---|
| 414 | "%c%c" /* host length */
|
---|
| 415 | "%c%c" /* host allocated space */
|
---|
| 416 | "%c%c" /* host name offset */
|
---|
| 417 | "%c%c" /* 2 zeroes */
|
---|
| 418 | "%s" /* host name */
|
---|
| 419 | "%s", /* domain string */
|
---|
| 420 | 0, /* trailing zero */
|
---|
| 421 | 0, 0, 0, /* part of type-1 long */
|
---|
| 422 |
|
---|
| 423 | LONGQUARTET(NTLMFLAG_NEGOTIATE_OEM |
|
---|
| 424 | NTLMFLAG_REQUEST_TARGET |
|
---|
| 425 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
| 426 | NTLM2FLAG |
|
---|
| 427 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN),
|
---|
| 428 | SHORTPAIR(domlen),
|
---|
| 429 | SHORTPAIR(domlen),
|
---|
| 430 | SHORTPAIR(domoff),
|
---|
| 431 | 0, 0,
|
---|
| 432 | SHORTPAIR(hostlen),
|
---|
| 433 | SHORTPAIR(hostlen),
|
---|
| 434 | SHORTPAIR(hostoff),
|
---|
| 435 | 0, 0,
|
---|
| 436 | host, /* this is empty */
|
---|
| 437 | domain /* this is empty */);
|
---|
| 438 |
|
---|
| 439 | /* Initial packet length */
|
---|
| 440 | size = 32 + hostlen + domlen;
|
---|
| 441 |
|
---|
| 442 | DEBUG_OUT({
|
---|
| 443 | fprintf(stderr, "* TYPE1 header flags=0x%02.2x%02.2x%02.2x%02.2x "
|
---|
| 444 | "0x%08.8x ",
|
---|
| 445 | LONGQUARTET(NTLMFLAG_NEGOTIATE_OEM |
|
---|
| 446 | NTLMFLAG_REQUEST_TARGET |
|
---|
| 447 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
| 448 | NTLM2FLAG |
|
---|
| 449 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN),
|
---|
| 450 | NTLMFLAG_NEGOTIATE_OEM |
|
---|
| 451 | NTLMFLAG_REQUEST_TARGET |
|
---|
| 452 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
| 453 | NTLM2FLAG |
|
---|
| 454 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN);
|
---|
| 455 | ntlm_print_flags(stderr,
|
---|
| 456 | NTLMFLAG_NEGOTIATE_OEM |
|
---|
| 457 | NTLMFLAG_REQUEST_TARGET |
|
---|
| 458 | NTLMFLAG_NEGOTIATE_NTLM_KEY |
|
---|
| 459 | NTLM2FLAG |
|
---|
| 460 | NTLMFLAG_NEGOTIATE_ALWAYS_SIGN);
|
---|
| 461 | fprintf(stderr, "\n****\n");
|
---|
| 462 | });
|
---|
| 463 |
|
---|
| 464 | /* Return with binary blob encoded into base64 */
|
---|
| 465 | return Curl_base64_encode(data, (char *)ntlmbuf, size, outptr, outlen);
|
---|
| 466 | }
|
---|
| 467 |
|
---|
| 468 | /*
|
---|
| 469 | * Curl_auth_create_ntlm_type3_message()
|
---|
| 470 | *
|
---|
| 471 | * This is used to generate an already encoded NTLM type-3 message ready for
|
---|
| 472 | * sending to the recipient using the appropriate compile time crypto API.
|
---|
| 473 | *
|
---|
| 474 | * Parameters:
|
---|
| 475 | *
|
---|
| 476 | * data [in] - The session handle.
|
---|
| 477 | * userp [in] - The user name in the format User or Domain\User.
|
---|
| 478 | * passdwp [in] - The user's password.
|
---|
| 479 | * ntlm [in/out] - The NTLM data struct being used and modified.
|
---|
| 480 | * outptr [in/out] - The address where a pointer to newly allocated memory
|
---|
| 481 | * holding the result will be stored upon completion.
|
---|
| 482 | * outlen [out] - The length of the output message.
|
---|
| 483 | *
|
---|
| 484 | * Returns CURLE_OK on success.
|
---|
| 485 | */
|
---|
| 486 | CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
|
---|
| 487 | const char *userp,
|
---|
| 488 | const char *passwdp,
|
---|
| 489 | struct ntlmdata *ntlm,
|
---|
| 490 | char **outptr, size_t *outlen)
|
---|
| 491 |
|
---|
| 492 | {
|
---|
| 493 | /* NTLM type-3 message structure:
|
---|
| 494 |
|
---|
| 495 | Index Description Content
|
---|
| 496 | 0 NTLMSSP Signature Null-terminated ASCII "NTLMSSP"
|
---|
| 497 | (0x4e544c4d53535000)
|
---|
| 498 | 8 NTLM Message Type long (0x03000000)
|
---|
| 499 | 12 LM/LMv2 Response security buffer
|
---|
| 500 | 20 NTLM/NTLMv2 Response security buffer
|
---|
| 501 | 28 Target Name security buffer
|
---|
| 502 | 36 User Name security buffer
|
---|
| 503 | 44 Workstation Name security buffer
|
---|
| 504 | (52) Session Key security buffer (*)
|
---|
| 505 | (60) Flags long (*)
|
---|
| 506 | (64) OS Version Structure 8 bytes (*)
|
---|
| 507 | 52 (64) (72) Start of data block
|
---|
| 508 | (*) -> Optional
|
---|
| 509 | */
|
---|
| 510 |
|
---|
| 511 | CURLcode result = CURLE_OK;
|
---|
| 512 | size_t size;
|
---|
| 513 | unsigned char ntlmbuf[NTLM_BUFSIZE];
|
---|
| 514 | int lmrespoff;
|
---|
| 515 | unsigned char lmresp[24]; /* fixed-size */
|
---|
| 516 | #ifdef USE_NTRESPONSES
|
---|
| 517 | int ntrespoff;
|
---|
| 518 | unsigned int ntresplen = 24;
|
---|
| 519 | unsigned char ntresp[24]; /* fixed-size */
|
---|
| 520 | unsigned char *ptr_ntresp = &ntresp[0];
|
---|
| 521 | unsigned char *ntlmv2resp = NULL;
|
---|
| 522 | #endif
|
---|
| 523 | bool unicode = (ntlm->flags & NTLMFLAG_NEGOTIATE_UNICODE) ? TRUE : FALSE;
|
---|
| 524 | char host[HOSTNAME_MAX + 1] = "";
|
---|
| 525 | const char *user;
|
---|
| 526 | const char *domain = "";
|
---|
| 527 | size_t hostoff = 0;
|
---|
| 528 | size_t useroff = 0;
|
---|
| 529 | size_t domoff = 0;
|
---|
| 530 | size_t hostlen = 0;
|
---|
| 531 | size_t userlen = 0;
|
---|
| 532 | size_t domlen = 0;
|
---|
| 533 |
|
---|
| 534 | user = strchr(userp, '\\');
|
---|
| 535 | if(!user)
|
---|
| 536 | user = strchr(userp, '/');
|
---|
| 537 |
|
---|
| 538 | if(user) {
|
---|
| 539 | domain = userp;
|
---|
| 540 | domlen = (user - domain);
|
---|
| 541 | user++;
|
---|
| 542 | }
|
---|
| 543 | else
|
---|
| 544 | user = userp;
|
---|
| 545 |
|
---|
| 546 | userlen = strlen(user);
|
---|
| 547 |
|
---|
| 548 | /* Get the machine's un-qualified host name as NTLM doesn't like the fully
|
---|
| 549 | qualified domain name */
|
---|
| 550 | if(Curl_gethostname(host, sizeof(host))) {
|
---|
| 551 | infof(data, "gethostname() failed, continuing without!\n");
|
---|
| 552 | hostlen = 0;
|
---|
| 553 | }
|
---|
| 554 | else {
|
---|
| 555 | hostlen = strlen(host);
|
---|
| 556 | }
|
---|
| 557 |
|
---|
| 558 | #if defined(USE_NTRESPONSES) && defined(USE_NTLM_V2)
|
---|
| 559 | if(ntlm->target_info_len) {
|
---|
| 560 | unsigned char ntbuffer[0x18];
|
---|
| 561 | unsigned char entropy[8];
|
---|
| 562 | unsigned char ntlmv2hash[0x18];
|
---|
| 563 |
|
---|
| 564 | result = Curl_rand(data, entropy, 8);
|
---|
| 565 | if(result)
|
---|
| 566 | return result;
|
---|
| 567 |
|
---|
| 568 | result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
|
---|
| 569 | if(result)
|
---|
| 570 | return result;
|
---|
| 571 |
|
---|
| 572 | result = Curl_ntlm_core_mk_ntlmv2_hash(user, userlen, domain, domlen,
|
---|
| 573 | ntbuffer, ntlmv2hash);
|
---|
| 574 | if(result)
|
---|
| 575 | return result;
|
---|
| 576 |
|
---|
| 577 | /* LMv2 response */
|
---|
| 578 | result = Curl_ntlm_core_mk_lmv2_resp(ntlmv2hash, entropy,
|
---|
| 579 | &ntlm->nonce[0], lmresp);
|
---|
| 580 | if(result)
|
---|
| 581 | return result;
|
---|
| 582 |
|
---|
| 583 | /* NTLMv2 response */
|
---|
| 584 | result = Curl_ntlm_core_mk_ntlmv2_resp(ntlmv2hash, entropy,
|
---|
| 585 | ntlm, &ntlmv2resp, &ntresplen);
|
---|
| 586 | if(result)
|
---|
| 587 | return result;
|
---|
| 588 |
|
---|
| 589 | ptr_ntresp = ntlmv2resp;
|
---|
| 590 | }
|
---|
| 591 | else
|
---|
| 592 | #endif
|
---|
| 593 |
|
---|
| 594 | #if defined(USE_NTRESPONSES) && defined(USE_NTLM2SESSION)
|
---|
| 595 | /* We don't support NTLM2 if we don't have USE_NTRESPONSES */
|
---|
| 596 | if(ntlm->flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY) {
|
---|
| 597 | unsigned char ntbuffer[0x18];
|
---|
| 598 | unsigned char tmp[0x18];
|
---|
| 599 | unsigned char md5sum[MD5_DIGEST_LENGTH];
|
---|
| 600 | unsigned char entropy[8];
|
---|
| 601 |
|
---|
| 602 | /* Need to create 8 bytes random data */
|
---|
| 603 | result = Curl_rand(data, entropy, 8);
|
---|
| 604 | if(result)
|
---|
| 605 | return result;
|
---|
| 606 |
|
---|
| 607 | /* 8 bytes random data as challenge in lmresp */
|
---|
| 608 | memcpy(lmresp, entropy, 8);
|
---|
| 609 |
|
---|
| 610 | /* Pad with zeros */
|
---|
| 611 | memset(lmresp + 8, 0, 0x10);
|
---|
| 612 |
|
---|
| 613 | /* Fill tmp with challenge(nonce?) + entropy */
|
---|
| 614 | memcpy(tmp, &ntlm->nonce[0], 8);
|
---|
| 615 | memcpy(tmp + 8, entropy, 8);
|
---|
| 616 |
|
---|
| 617 | result = Curl_ssl_md5sum(tmp, 16, md5sum, MD5_DIGEST_LENGTH);
|
---|
| 618 | if(!result)
|
---|
| 619 | /* We shall only use the first 8 bytes of md5sum, but the des code in
|
---|
| 620 | Curl_ntlm_core_lm_resp only encrypt the first 8 bytes */
|
---|
| 621 | result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
|
---|
| 622 | if(result)
|
---|
| 623 | return result;
|
---|
| 624 |
|
---|
| 625 | Curl_ntlm_core_lm_resp(ntbuffer, md5sum, ntresp);
|
---|
| 626 |
|
---|
| 627 | /* End of NTLM2 Session code */
|
---|
| 628 |
|
---|
| 629 | }
|
---|
| 630 | else
|
---|
| 631 | #endif
|
---|
| 632 | {
|
---|
| 633 |
|
---|
| 634 | #ifdef USE_NTRESPONSES
|
---|
| 635 | unsigned char ntbuffer[0x18];
|
---|
| 636 | #endif
|
---|
| 637 | unsigned char lmbuffer[0x18];
|
---|
| 638 |
|
---|
| 639 | #ifdef USE_NTRESPONSES
|
---|
| 640 | result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
|
---|
| 641 | if(result)
|
---|
| 642 | return result;
|
---|
| 643 |
|
---|
| 644 | Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], ntresp);
|
---|
| 645 | #endif
|
---|
| 646 |
|
---|
| 647 | result = Curl_ntlm_core_mk_lm_hash(data, passwdp, lmbuffer);
|
---|
| 648 | if(result)
|
---|
| 649 | return result;
|
---|
| 650 |
|
---|
| 651 | Curl_ntlm_core_lm_resp(lmbuffer, &ntlm->nonce[0], lmresp);
|
---|
| 652 |
|
---|
| 653 | /* A safer but less compatible alternative is:
|
---|
| 654 | * Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], lmresp);
|
---|
| 655 | * See https://davenport.sourceforge.io/ntlm.html#ntlmVersion2 */
|
---|
| 656 | }
|
---|
| 657 |
|
---|
| 658 | if(unicode) {
|
---|
| 659 | domlen = domlen * 2;
|
---|
| 660 | userlen = userlen * 2;
|
---|
| 661 | hostlen = hostlen * 2;
|
---|
| 662 | }
|
---|
| 663 |
|
---|
| 664 | lmrespoff = 64; /* size of the message header */
|
---|
| 665 | #ifdef USE_NTRESPONSES
|
---|
| 666 | ntrespoff = lmrespoff + 0x18;
|
---|
| 667 | domoff = ntrespoff + ntresplen;
|
---|
| 668 | #else
|
---|
| 669 | domoff = lmrespoff + 0x18;
|
---|
| 670 | #endif
|
---|
| 671 | useroff = domoff + domlen;
|
---|
| 672 | hostoff = useroff + userlen;
|
---|
| 673 |
|
---|
| 674 | /* Create the big type-3 message binary blob */
|
---|
| 675 | size = snprintf((char *)ntlmbuf, NTLM_BUFSIZE,
|
---|
| 676 | NTLMSSP_SIGNATURE "%c"
|
---|
| 677 | "\x03%c%c%c" /* 32-bit type = 3 */
|
---|
| 678 |
|
---|
| 679 | "%c%c" /* LanManager length */
|
---|
| 680 | "%c%c" /* LanManager allocated space */
|
---|
| 681 | "%c%c" /* LanManager offset */
|
---|
| 682 | "%c%c" /* 2 zeroes */
|
---|
| 683 |
|
---|
| 684 | "%c%c" /* NT-response length */
|
---|
| 685 | "%c%c" /* NT-response allocated space */
|
---|
| 686 | "%c%c" /* NT-response offset */
|
---|
| 687 | "%c%c" /* 2 zeroes */
|
---|
| 688 |
|
---|
| 689 | "%c%c" /* domain length */
|
---|
| 690 | "%c%c" /* domain allocated space */
|
---|
| 691 | "%c%c" /* domain name offset */
|
---|
| 692 | "%c%c" /* 2 zeroes */
|
---|
| 693 |
|
---|
| 694 | "%c%c" /* user length */
|
---|
| 695 | "%c%c" /* user allocated space */
|
---|
| 696 | "%c%c" /* user offset */
|
---|
| 697 | "%c%c" /* 2 zeroes */
|
---|
| 698 |
|
---|
| 699 | "%c%c" /* host length */
|
---|
| 700 | "%c%c" /* host allocated space */
|
---|
| 701 | "%c%c" /* host offset */
|
---|
| 702 | "%c%c" /* 2 zeroes */
|
---|
| 703 |
|
---|
| 704 | "%c%c" /* session key length (unknown purpose) */
|
---|
| 705 | "%c%c" /* session key allocated space (unknown purpose) */
|
---|
| 706 | "%c%c" /* session key offset (unknown purpose) */
|
---|
| 707 | "%c%c" /* 2 zeroes */
|
---|
| 708 |
|
---|
| 709 | "%c%c%c%c", /* flags */
|
---|
| 710 |
|
---|
| 711 | /* domain string */
|
---|
| 712 | /* user string */
|
---|
| 713 | /* host string */
|
---|
| 714 | /* LanManager response */
|
---|
| 715 | /* NT response */
|
---|
| 716 |
|
---|
| 717 | 0, /* zero termination */
|
---|
| 718 | 0, 0, 0, /* type-3 long, the 24 upper bits */
|
---|
| 719 |
|
---|
| 720 | SHORTPAIR(0x18), /* LanManager response length, twice */
|
---|
| 721 | SHORTPAIR(0x18),
|
---|
| 722 | SHORTPAIR(lmrespoff),
|
---|
| 723 | 0x0, 0x0,
|
---|
| 724 |
|
---|
| 725 | #ifdef USE_NTRESPONSES
|
---|
| 726 | SHORTPAIR(ntresplen), /* NT-response length, twice */
|
---|
| 727 | SHORTPAIR(ntresplen),
|
---|
| 728 | SHORTPAIR(ntrespoff),
|
---|
| 729 | 0x0, 0x0,
|
---|
| 730 | #else
|
---|
| 731 | 0x0, 0x0,
|
---|
| 732 | 0x0, 0x0,
|
---|
| 733 | 0x0, 0x0,
|
---|
| 734 | 0x0, 0x0,
|
---|
| 735 | #endif
|
---|
| 736 | SHORTPAIR(domlen),
|
---|
| 737 | SHORTPAIR(domlen),
|
---|
| 738 | SHORTPAIR(domoff),
|
---|
| 739 | 0x0, 0x0,
|
---|
| 740 |
|
---|
| 741 | SHORTPAIR(userlen),
|
---|
| 742 | SHORTPAIR(userlen),
|
---|
| 743 | SHORTPAIR(useroff),
|
---|
| 744 | 0x0, 0x0,
|
---|
| 745 |
|
---|
| 746 | SHORTPAIR(hostlen),
|
---|
| 747 | SHORTPAIR(hostlen),
|
---|
| 748 | SHORTPAIR(hostoff),
|
---|
| 749 | 0x0, 0x0,
|
---|
| 750 |
|
---|
| 751 | 0x0, 0x0,
|
---|
| 752 | 0x0, 0x0,
|
---|
| 753 | 0x0, 0x0,
|
---|
| 754 | 0x0, 0x0,
|
---|
| 755 |
|
---|
| 756 | LONGQUARTET(ntlm->flags));
|
---|
| 757 |
|
---|
| 758 | DEBUGASSERT(size == 64);
|
---|
| 759 | DEBUGASSERT(size == (size_t)lmrespoff);
|
---|
| 760 |
|
---|
| 761 | /* We append the binary hashes */
|
---|
| 762 | if(size < (NTLM_BUFSIZE - 0x18)) {
|
---|
| 763 | memcpy(&ntlmbuf[size], lmresp, 0x18);
|
---|
| 764 | size += 0x18;
|
---|
| 765 | }
|
---|
| 766 |
|
---|
| 767 | DEBUG_OUT({
|
---|
| 768 | fprintf(stderr, "**** TYPE3 header lmresp=");
|
---|
| 769 | ntlm_print_hex(stderr, (char *)&ntlmbuf[lmrespoff], 0x18);
|
---|
| 770 | });
|
---|
| 771 |
|
---|
| 772 | #ifdef USE_NTRESPONSES
|
---|
| 773 | if(size < (NTLM_BUFSIZE - ntresplen)) {
|
---|
| 774 | DEBUGASSERT(size == (size_t)ntrespoff);
|
---|
| 775 | memcpy(&ntlmbuf[size], ptr_ntresp, ntresplen);
|
---|
| 776 | size += ntresplen;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | DEBUG_OUT({
|
---|
| 780 | fprintf(stderr, "\n ntresp=");
|
---|
| 781 | ntlm_print_hex(stderr, (char *)&ntlmbuf[ntrespoff], ntresplen);
|
---|
| 782 | });
|
---|
| 783 |
|
---|
| 784 | free(ntlmv2resp);/* Free the dynamic buffer allocated for NTLMv2 */
|
---|
| 785 |
|
---|
| 786 | #endif
|
---|
| 787 |
|
---|
| 788 | DEBUG_OUT({
|
---|
| 789 | fprintf(stderr, "\n flags=0x%02.2x%02.2x%02.2x%02.2x 0x%08.8x ",
|
---|
| 790 | LONGQUARTET(ntlm->flags), ntlm->flags);
|
---|
| 791 | ntlm_print_flags(stderr, ntlm->flags);
|
---|
| 792 | fprintf(stderr, "\n****\n");
|
---|
| 793 | });
|
---|
| 794 |
|
---|
| 795 | /* Make sure that the domain, user and host strings fit in the
|
---|
| 796 | buffer before we copy them there. */
|
---|
| 797 | if(size + userlen + domlen + hostlen >= NTLM_BUFSIZE) {
|
---|
| 798 | failf(data, "user + domain + host name too big");
|
---|
| 799 | return CURLE_OUT_OF_MEMORY;
|
---|
| 800 | }
|
---|
| 801 |
|
---|
| 802 | DEBUGASSERT(size == domoff);
|
---|
| 803 | if(unicode)
|
---|
| 804 | unicodecpy(&ntlmbuf[size], domain, domlen / 2);
|
---|
| 805 | else
|
---|
| 806 | memcpy(&ntlmbuf[size], domain, domlen);
|
---|
| 807 |
|
---|
| 808 | size += domlen;
|
---|
| 809 |
|
---|
| 810 | DEBUGASSERT(size == useroff);
|
---|
| 811 | if(unicode)
|
---|
| 812 | unicodecpy(&ntlmbuf[size], user, userlen / 2);
|
---|
| 813 | else
|
---|
| 814 | memcpy(&ntlmbuf[size], user, userlen);
|
---|
| 815 |
|
---|
| 816 | size += userlen;
|
---|
| 817 |
|
---|
| 818 | DEBUGASSERT(size == hostoff);
|
---|
| 819 | if(unicode)
|
---|
| 820 | unicodecpy(&ntlmbuf[size], host, hostlen / 2);
|
---|
| 821 | else
|
---|
| 822 | memcpy(&ntlmbuf[size], host, hostlen);
|
---|
| 823 |
|
---|
| 824 | size += hostlen;
|
---|
| 825 |
|
---|
| 826 | /* Convert domain, user, and host to ASCII but leave the rest as-is */
|
---|
| 827 | result = Curl_convert_to_network(data, (char *)&ntlmbuf[domoff],
|
---|
| 828 | size - domoff);
|
---|
| 829 | if(result)
|
---|
| 830 | return CURLE_CONV_FAILED;
|
---|
| 831 |
|
---|
| 832 | /* Return with binary blob encoded into base64 */
|
---|
| 833 | result = Curl_base64_encode(data, (char *)ntlmbuf, size, outptr, outlen);
|
---|
| 834 |
|
---|
| 835 | Curl_auth_ntlm_cleanup(ntlm);
|
---|
| 836 |
|
---|
| 837 | return result;
|
---|
| 838 | }
|
---|
| 839 |
|
---|
| 840 | /*
|
---|
| 841 | * Curl_auth_ntlm_cleanup()
|
---|
| 842 | *
|
---|
| 843 | * This is used to clean up the NTLM specific data.
|
---|
| 844 | *
|
---|
| 845 | * Parameters:
|
---|
| 846 | *
|
---|
| 847 | * ntlm [in/out] - The NTLM data struct being cleaned up.
|
---|
| 848 | *
|
---|
| 849 | */
|
---|
| 850 | void Curl_auth_ntlm_cleanup(struct ntlmdata *ntlm)
|
---|
| 851 | {
|
---|
| 852 | /* Free the target info */
|
---|
| 853 | Curl_safefree(ntlm->target_info);
|
---|
| 854 |
|
---|
| 855 | /* Reset any variables */
|
---|
| 856 | ntlm->target_info_len = 0;
|
---|
| 857 | }
|
---|
| 858 |
|
---|
| 859 | #endif /* USE_NTLM && !USE_WINDOWS_SSPI */
|
---|