/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2021, Daniel Stenberg, , et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ #include "curl_setup.h" #if defined(USE_CURL_NTLM_CORE) /* * NTLM details: * * https://davenport.sourceforge.io/ntlm.html * https://www.innovation.ch/java/ntlm.html */ /* Please keep the SSL backend-specific #if branches in this order: 1. USE_OPENSSL 2. USE_GNUTLS 3. USE_NSS 4. USE_MBEDTLS 5. USE_SECTRANSP 6. USE_OS400CRYPTO 7. USE_WIN32_CRYPTO This ensures that: - the same SSL branch gets activated throughout this source file even if multiple backends are enabled at the same time. - OpenSSL and NSS have higher priority than Windows Crypt, due to issues with the latter supporting NTLM2Session responses in NTLM type-3 messages. */ #if defined(USE_OPENSSL) #include #if !defined(OPENSSL_NO_DES) && !defined(OPENSSL_NO_DEPRECATED_3_0) #define USE_OPENSSL_DES #endif #endif #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL) #ifdef USE_WOLFSSL #include #endif # include # include # include # include # if (defined(OPENSSL_VERSION_NUMBER) && \ (OPENSSL_VERSION_NUMBER < 0x00907001L)) && !defined(USE_WOLFSSL) # define DES_key_schedule des_key_schedule # define DES_cblock des_cblock # define DES_set_odd_parity des_set_odd_parity # define DES_set_key des_set_key # define DES_ecb_encrypt des_ecb_encrypt # define DESKEY(x) x # define DESKEYARG(x) x # else # define DESKEYARG(x) *x # define DESKEY(x) &x # endif #elif defined(USE_GNUTLS) # include #elif defined(USE_NSS) # include # include # include #elif defined(USE_MBEDTLS) # include #elif defined(USE_SECTRANSP) # include # include #elif defined(USE_OS400CRYPTO) # include "cipher.mih" /* mih/cipher */ #elif defined(USE_WIN32_CRYPTO) # include #else # error "Can't compile NTLM support without a crypto library with DES." #endif #include "urldata.h" #include "non-ascii.h" #include "strcase.h" #include "curl_ntlm_core.h" #include "curl_md5.h" #include "curl_hmac.h" #include "warnless.h" #include "curl_endian.h" #include "curl_des.h" #include "curl_md4.h" /* The last 3 #include files should be in this order */ #include "curl_printf.h" #include "curl_memory.h" #include "memdebug.h" #define NTLMv2_BLOB_SIGNATURE "\x01\x01\x00\x00" #define NTLMv2_BLOB_LEN (44 -16 + ntlm->target_info_len + 4) /* * Turns a 56-bit key into being 64-bit wide. */ static void extend_key_56_to_64(const unsigned char *key_56, char *key) { key[0] = key_56[0]; key[1] = (unsigned char)(((key_56[0] << 7) & 0xFF) | (key_56[1] >> 1)); key[2] = (unsigned char)(((key_56[1] << 6) & 0xFF) | (key_56[2] >> 2)); key[3] = (unsigned char)(((key_56[2] << 5) & 0xFF) | (key_56[3] >> 3)); key[4] = (unsigned char)(((key_56[3] << 4) & 0xFF) | (key_56[4] >> 4)); key[5] = (unsigned char)(((key_56[4] << 3) & 0xFF) | (key_56[5] >> 5)); key[6] = (unsigned char)(((key_56[5] << 2) & 0xFF) | (key_56[6] >> 6)); key[7] = (unsigned char) ((key_56[6] << 1) & 0xFF); } #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL) /* * Turns a 56 bit key into the 64 bit, odd parity key and sets the key. The * key schedule ks is also set. */ static void setup_des_key(const unsigned char *key_56, DES_key_schedule DESKEYARG(ks)) { DES_cblock key; /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, (char *) &key); /* Set the key parity to odd */ DES_set_odd_parity(&key); /* Set the key */ DES_set_key_unchecked(&key, ks); } #elif defined(USE_GNUTLS) static void setup_des_key(const unsigned char *key_56, struct des_ctx *des) { char key[8]; /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, key); /* Set the key parity to odd */ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); /* Set the key */ des_set_key(des, (const uint8_t *) key); } #elif defined(USE_NSS) /* * Expands a 56 bit key KEY_56 to 64 bit and encrypts 64 bit of data, using * the expanded key. The caller is responsible for giving 64 bit of valid * data is IN and (at least) 64 bit large buffer as OUT. */ static bool encrypt_des(const unsigned char *in, unsigned char *out, const unsigned char *key_56) { const CK_MECHANISM_TYPE mech = CKM_DES_ECB; /* DES cipher in ECB mode */ char key[8]; /* expanded 64 bit key */ SECItem key_item; PK11SymKey *symkey = NULL; SECItem *param = NULL; PK11Context *ctx = NULL; int out_len; /* not used, required by NSS */ bool rv = FALSE; /* use internal slot for DES encryption (requires NSS to be initialized) */ PK11SlotInfo *slot = PK11_GetInternalKeySlot(); if(!slot) return FALSE; /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, key); /* Set the key parity to odd */ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); /* Import the key */ key_item.data = (unsigned char *)key; key_item.len = sizeof(key); symkey = PK11_ImportSymKey(slot, mech, PK11_OriginUnwrap, CKA_ENCRYPT, &key_item, NULL); if(!symkey) goto fail; /* Create the DES encryption context */ param = PK11_ParamFromIV(mech, /* no IV in ECB mode */ NULL); if(!param) goto fail; ctx = PK11_CreateContextBySymKey(mech, CKA_ENCRYPT, symkey, param); if(!ctx) goto fail; /* Perform the encryption */ if(SECSuccess == PK11_CipherOp(ctx, out, &out_len, /* outbuflen */ 8, (unsigned char *)in, /* inbuflen */ 8) && SECSuccess == PK11_Finalize(ctx)) rv = /* all OK */ TRUE; fail: /* cleanup */ if(ctx) PK11_DestroyContext(ctx, PR_TRUE); if(symkey) PK11_FreeSymKey(symkey); if(param) SECITEM_FreeItem(param, PR_TRUE); PK11_FreeSlot(slot); return rv; } #elif defined(USE_MBEDTLS) static bool encrypt_des(const unsigned char *in, unsigned char *out, const unsigned char *key_56) { mbedtls_des_context ctx; char key[8]; /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, key); /* Set the key parity to odd */ mbedtls_des_key_set_parity((unsigned char *) key); /* Perform the encryption */ mbedtls_des_init(&ctx); mbedtls_des_setkey_enc(&ctx, (unsigned char *) key); return mbedtls_des_crypt_ecb(&ctx, in, out) == 0; } #elif defined(USE_SECTRANSP) static bool encrypt_des(const unsigned char *in, unsigned char *out, const unsigned char *key_56) { char key[8]; size_t out_len; CCCryptorStatus err; /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, key); /* Set the key parity to odd */ Curl_des_set_odd_parity((unsigned char *) key, sizeof(key)); /* Perform the encryption */ err = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode, key, kCCKeySizeDES, NULL, in, 8 /* inbuflen */, out, 8 /* outbuflen */, &out_len); return err == kCCSuccess; } #elif defined(USE_OS400CRYPTO) static bool encrypt_des(const unsigned char *in, unsigned char *out, const unsigned char *key_56) { char key[8]; _CIPHER_Control_T ctl; /* Setup the cipher control structure */ ctl.Func_ID = ENCRYPT_ONLY; ctl.Data_Len = sizeof(key); /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, ctl.Crypto_Key); /* Set the key parity to odd */ Curl_des_set_odd_parity((unsigned char *) ctl.Crypto_Key, ctl.Data_Len); /* Perform the encryption */ _CIPHER((_SPCPTR *) &out, &ctl, (_SPCPTR *) &in); return TRUE; } #elif defined(USE_WIN32_CRYPTO) static bool encrypt_des(const unsigned char *in, unsigned char *out, const unsigned char *key_56) { HCRYPTPROV hprov; HCRYPTKEY hkey; struct { BLOBHEADER hdr; unsigned int len; char key[8]; } blob; DWORD len = 8; /* Acquire the crypto provider */ if(!CryptAcquireContext(&hprov, NULL, NULL, PROV_RSA_FULL, CRYPT_VERIFYCONTEXT | CRYPT_SILENT)) return FALSE; /* Setup the key blob structure */ memset(&blob, 0, sizeof(blob)); blob.hdr.bType = PLAINTEXTKEYBLOB; blob.hdr.bVersion = 2; blob.hdr.aiKeyAlg = CALG_DES; blob.len = sizeof(blob.key); /* Expand the 56-bit key to 64-bits */ extend_key_56_to_64(key_56, blob.key); /* Set the key parity to odd */ Curl_des_set_odd_parity((unsigned char *) blob.key, sizeof(blob.key)); /* Import the key */ if(!CryptImportKey(hprov, (BYTE *) &blob, sizeof(blob), 0, 0, &hkey)) { CryptReleaseContext(hprov, 0); return FALSE; } memcpy(out, in, 8); /* Perform the encryption */ CryptEncrypt(hkey, 0, FALSE, 0, out, &len, len); CryptDestroyKey(hkey); CryptReleaseContext(hprov, 0); return TRUE; } #endif /* defined(USE_WIN32_CRYPTO) */ /* * takes a 21 byte array and treats it as 3 56-bit DES keys. The * 8 byte plaintext is encrypted with each key and the resulting 24 * bytes are stored in the results array. */ void Curl_ntlm_core_lm_resp(const unsigned char *keys, const unsigned char *plaintext, unsigned char *results) { #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL) DES_key_schedule ks; setup_des_key(keys, DESKEY(ks)); DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) results, DESKEY(ks), DES_ENCRYPT); setup_des_key(keys + 7, DESKEY(ks)); DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 8), DESKEY(ks), DES_ENCRYPT); setup_des_key(keys + 14, DESKEY(ks)); DES_ecb_encrypt((DES_cblock*) plaintext, (DES_cblock*) (results + 16), DESKEY(ks), DES_ENCRYPT); #elif defined(USE_GNUTLS) struct des_ctx des; setup_des_key(keys, &des); des_encrypt(&des, 8, results, plaintext); setup_des_key(keys + 7, &des); des_encrypt(&des, 8, results + 8, plaintext); setup_des_key(keys + 14, &des); des_encrypt(&des, 8, results + 16, plaintext); #elif defined(USE_NSS) || defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \ || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO) encrypt_des(plaintext, results, keys); encrypt_des(plaintext, results + 8, keys + 7); encrypt_des(plaintext, results + 16, keys + 14); #endif } /* * Set up lanmanager hashed password */ CURLcode Curl_ntlm_core_mk_lm_hash(struct Curl_easy *data, const char *password, unsigned char *lmbuffer /* 21 bytes */) { CURLcode result; unsigned char pw[14]; static const unsigned char magic[] = { 0x4B, 0x47, 0x53, 0x21, 0x40, 0x23, 0x24, 0x25 /* i.e. KGS!@#$% */ }; size_t len = CURLMIN(strlen(password), 14); Curl_strntoupper((char *)pw, password, len); memset(&pw[len], 0, 14 - len); /* * The LanManager hashed password needs to be created using the * password in the network encoding not the host encoding. */ result = Curl_convert_to_network(data, (char *)pw, 14); if(result) return result; { /* Create LanManager hashed password. */ #if defined(USE_OPENSSL_DES) || defined(USE_WOLFSSL) DES_key_schedule ks; setup_des_key(pw, DESKEY(ks)); DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)lmbuffer, DESKEY(ks), DES_ENCRYPT); setup_des_key(pw + 7, DESKEY(ks)); DES_ecb_encrypt((DES_cblock *)magic, (DES_cblock *)(lmbuffer + 8), DESKEY(ks), DES_ENCRYPT); #elif defined(USE_GNUTLS) struct des_ctx des; setup_des_key(pw, &des); des_encrypt(&des, 8, lmbuffer, magic); setup_des_key(pw + 7, &des); des_encrypt(&des, 8, lmbuffer + 8, magic); #elif defined(USE_NSS) || defined(USE_MBEDTLS) || defined(USE_SECTRANSP) \ || defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO) encrypt_des(magic, lmbuffer, pw); encrypt_des(magic, lmbuffer + 8, pw + 7); #endif memset(lmbuffer + 16, 0, 21 - 16); } return CURLE_OK; } #ifdef USE_NTRESPONSES static void ascii_to_unicode_le(unsigned char *dest, const char *src, size_t srclen) { size_t i; for(i = 0; i < srclen; i++) { dest[2 * i] = (unsigned char)src[i]; dest[2 * i + 1] = '\0'; } } #if defined(USE_NTLM_V2) && !defined(USE_WINDOWS_SSPI) static void ascii_uppercase_to_unicode_le(unsigned char *dest, const char *src, size_t srclen) { size_t i; for(i = 0; i < srclen; i++) { dest[2 * i] = (unsigned char)(Curl_raw_toupper(src[i])); dest[2 * i + 1] = '\0'; } } #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */ /* * Set up nt hashed passwords * @unittest: 1600 */ CURLcode Curl_ntlm_core_mk_nt_hash(struct Curl_easy *data, const char *password, unsigned char *ntbuffer /* 21 bytes */) { size_t len = strlen(password); unsigned char *pw; CURLcode result; if(len > SIZE_T_MAX/2) /* avoid integer overflow */ return CURLE_OUT_OF_MEMORY; pw = len ? malloc(len * 2) : (unsigned char *)strdup(""); if(!pw) return CURLE_OUT_OF_MEMORY; ascii_to_unicode_le(pw, password, len); /* * The NT hashed password needs to be created using the password in the * network encoding not the host encoding. */ result = Curl_convert_to_network(data, (char *)pw, len * 2); if(!result) { /* Create NT hashed password. */ Curl_md4it(ntbuffer, pw, 2 * len); memset(ntbuffer + 16, 0, 21 - 16); } free(pw); return result; } #if defined(USE_NTLM_V2) && !defined(USE_WINDOWS_SSPI) /* Timestamp in tenths of a microsecond since January 1, 1601 00:00:00 UTC. */ struct ms_filetime { unsigned int dwLowDateTime; unsigned int dwHighDateTime; }; /* Convert a time_t to an MS FILETIME (MS-DTYP section 2.3.3). */ static void time2filetime(struct ms_filetime *ft, time_t t) { #if SIZEOF_TIME_T > 4 t = (t + CURL_OFF_T_C(11644473600)) * 10000000; ft->dwLowDateTime = (unsigned int) (t & 0xFFFFFFFF); ft->dwHighDateTime = (unsigned int) (t >> 32); #else unsigned int r, s; unsigned int i; ft->dwLowDateTime = t & 0xFFFFFFFF; ft->dwHighDateTime = 0; # ifndef HAVE_TIME_T_UNSIGNED /* Extend sign if needed. */ if(ft->dwLowDateTime & 0x80000000) ft->dwHighDateTime = ~0; # endif /* Bias seconds to Jan 1, 1601. 134774 days = 11644473600 seconds = 0x2B6109100 */ r = ft->dwLowDateTime; ft->dwLowDateTime = (ft->dwLowDateTime + 0xB6109100U) & 0xFFFFFFFF; ft->dwHighDateTime += ft->dwLowDateTime < r? 0x03: 0x02; /* Convert to tenths of microseconds. */ ft->dwHighDateTime *= 10000000; i = 32; do { i -= 8; s = ((ft->dwLowDateTime >> i) & 0xFF) * (10000000 - 1); r = (s << i) & 0xFFFFFFFF; s >>= 1; /* Split shift to avoid width overflow. */ s >>= 31 - i; ft->dwLowDateTime = (ft->dwLowDateTime + r) & 0xFFFFFFFF; if(ft->dwLowDateTime < r) s++; ft->dwHighDateTime += s; } while(i); ft->dwHighDateTime &= 0xFFFFFFFF; #endif } /* This creates the NTLMv2 hash by using NTLM hash as the key and Unicode * (uppercase UserName + Domain) as the data */ CURLcode Curl_ntlm_core_mk_ntlmv2_hash(const char *user, size_t userlen, const char *domain, size_t domlen, unsigned char *ntlmhash, unsigned char *ntlmv2hash) { /* Unicode representation */ size_t identity_len; unsigned char *identity; CURLcode result = CURLE_OK; if((userlen > CURL_MAX_INPUT_LENGTH) || (domlen > CURL_MAX_INPUT_LENGTH)) return CURLE_OUT_OF_MEMORY; identity_len = (userlen + domlen) * 2; identity = malloc(identity_len + 1); if(!identity) return CURLE_OUT_OF_MEMORY; ascii_uppercase_to_unicode_le(identity, user, userlen); ascii_to_unicode_le(identity + (userlen << 1), domain, domlen); result = Curl_hmacit(Curl_HMAC_MD5, ntlmhash, 16, identity, identity_len, ntlmv2hash); free(identity); return result; } /* * Curl_ntlm_core_mk_ntlmv2_resp() * * This creates the NTLMv2 response as set in the ntlm type-3 message. * * Parameters: * * ntlmv2hash [in] - The ntlmv2 hash (16 bytes) * challenge_client [in] - The client nonce (8 bytes) * ntlm [in] - The ntlm data struct being used to read TargetInfo and Server challenge received in the type-2 message * ntresp [out] - The address where a pointer to newly allocated * memory holding the NTLMv2 response. * ntresp_len [out] - The length of the output message. * * Returns CURLE_OK on success. */ CURLcode Curl_ntlm_core_mk_ntlmv2_resp(unsigned char *ntlmv2hash, unsigned char *challenge_client, struct ntlmdata *ntlm, unsigned char **ntresp, unsigned int *ntresp_len) { /* NTLMv2 response structure : ------------------------------------------------------------------------------ 0 HMAC MD5 16 bytes ------BLOB-------------------------------------------------------------------- 16 Signature 0x01010000 20 Reserved long (0x00000000) 24 Timestamp LE, 64-bit signed value representing the number of tenths of a microsecond since January 1, 1601. 32 Client Nonce 8 bytes 40 Unknown 4 bytes 44 Target Info N bytes (from the type-2 message) 44+N Unknown 4 bytes ------------------------------------------------------------------------------ */ unsigned int len = 0; unsigned char *ptr = NULL; unsigned char hmac_output[HMAC_MD5_LENGTH]; struct ms_filetime tw; CURLcode result = CURLE_OK; /* Calculate the timestamp */ #ifdef DEBUGBUILD char *force_timestamp = getenv("CURL_FORCETIME"); if(force_timestamp) time2filetime(&tw, (time_t) 0); else #endif time2filetime(&tw, time(NULL)); /* Calculate the response len */ len = HMAC_MD5_LENGTH + NTLMv2_BLOB_LEN; /* Allocate the response */ ptr = calloc(1, len); if(!ptr) return CURLE_OUT_OF_MEMORY; /* Create the BLOB structure */ msnprintf((char *)ptr + HMAC_MD5_LENGTH, NTLMv2_BLOB_LEN, "%c%c%c%c" /* NTLMv2_BLOB_SIGNATURE */ "%c%c%c%c" /* Reserved = 0 */ "%c%c%c%c%c%c%c%c", /* Timestamp */ NTLMv2_BLOB_SIGNATURE[0], NTLMv2_BLOB_SIGNATURE[1], NTLMv2_BLOB_SIGNATURE[2], NTLMv2_BLOB_SIGNATURE[3], 0, 0, 0, 0, LONGQUARTET(tw.dwLowDateTime), LONGQUARTET(tw.dwHighDateTime)); memcpy(ptr + 32, challenge_client, 8); memcpy(ptr + 44, ntlm->target_info, ntlm->target_info_len); /* Concatenate the Type 2 challenge with the BLOB and do HMAC MD5 */ memcpy(ptr + 8, &ntlm->nonce[0], 8); result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, HMAC_MD5_LENGTH, ptr + 8, NTLMv2_BLOB_LEN + 8, hmac_output); if(result) { free(ptr); return result; } /* Concatenate the HMAC MD5 output with the BLOB */ memcpy(ptr, hmac_output, HMAC_MD5_LENGTH); /* Return the response */ *ntresp = ptr; *ntresp_len = len; return result; } /* * Curl_ntlm_core_mk_lmv2_resp() * * This creates the LMv2 response as used in the ntlm type-3 message. * * Parameters: * * ntlmv2hash [in] - The ntlmv2 hash (16 bytes) * challenge_client [in] - The client nonce (8 bytes) * challenge_client [in] - The server challenge (8 bytes) * lmresp [out] - The LMv2 response (24 bytes) * * Returns CURLE_OK on success. */ CURLcode Curl_ntlm_core_mk_lmv2_resp(unsigned char *ntlmv2hash, unsigned char *challenge_client, unsigned char *challenge_server, unsigned char *lmresp) { unsigned char data[16]; unsigned char hmac_output[16]; CURLcode result = CURLE_OK; memcpy(&data[0], challenge_server, 8); memcpy(&data[8], challenge_client, 8); result = Curl_hmacit(Curl_HMAC_MD5, ntlmv2hash, 16, &data[0], 16, hmac_output); if(result) return result; /* Concatenate the HMAC MD5 output with the client nonce */ memcpy(lmresp, hmac_output, 16); memcpy(lmresp + 16, challenge_client, 8); return result; } #endif /* USE_NTLM_V2 && !USE_WINDOWS_SSPI */ #endif /* USE_NTRESPONSES */ #endif /* USE_CURL_NTLM_CORE */