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GeezerVison is showing github.com — cpython/Modules/_hashopenssl.c at 3.13 · python/cpython Expand file tree/ Copy path_hashopenssl.cMore file actions 2412 lines (2047 loc) · 63.6 KB / Copy path_hashopenssl.cFile metadata and controls2412 lines (2047 loc) · 63.6 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* Module that wraps all OpenSSL hash algorithms */ /* * Copyright (C) 2005-2010 Gregory P. Smith ([email protected]) * Licensed to PSF under a Contributor Agreement. * * Derived from a skeleton of shamodule.c containing work performed by: * * Andrew Kuchling ([email protected]) * Greg Stein ([email protected]) * */ /* Don't warn about deprecated functions, */ #ifndef OPENSSL_API_COMPAT // 0x10101000L == 1.1.1, 30000 == 3.0.0 #define OPENSSL_API_COMPAT 0x10101000L #endif #define OPENSSL_NO_DEPRECATED 1 #ifndef Py_BUILD_CORE_BUILTIN # define Py_BUILD_CORE_MODULE 1 #endif #include "Python.h" #include "pycore_hashtable.h" #include "pycore_pyhash.h" // _Py_HashBytes() #include "pycore_strhex.h" // _Py_strhex() #include "pycore_pyatomic_ft_wrappers.h" // FT_ATOMIC_LOAD_PTR_RELAXED #include "hashlib.h" /* EVP is the preferred interface to hashing in OpenSSL */ #include <openssl/evp.h> #include <openssl/hmac.h> #include <openssl/crypto.h> // FIPS_mode() /* We use the object interface to discover what hashes OpenSSL supports. */ #include <openssl/objects.h> #include <openssl/err.h> #include <stdbool.h> #ifndef OPENSSL_THREADS # error "OPENSSL_THREADS is not defined, Python requires thread-safe OpenSSL" #endif #define MUNCH_SIZE INT_MAX #define PY_OPENSSL_HAS_SCRYPT 1 #if defined(NID_sha3_224) && defined(NID_sha3_256) && defined(NID_sha3_384) && defined(NID_sha3_512) #define PY_OPENSSL_HAS_SHA3 1 #endif #if defined(NID_shake128) || defined(NID_shake256) #define PY_OPENSSL_HAS_SHAKE 1 #endif #if defined(NID_blake2s256) || defined(NID_blake2b512) #define PY_OPENSSL_HAS_BLAKE2 1 #endif #if OPENSSL_VERSION_NUMBER >= 0x30000000L #define PY_EVP_MD EVP_MD #define PY_EVP_MD_fetch(algorithm, properties) EVP_MD_fetch(NULL, algorithm, properties) #define PY_EVP_MD_up_ref(md) EVP_MD_up_ref(md) #define PY_EVP_MD_free(md) EVP_MD_free(md) #else #define PY_EVP_MD const EVP_MD #define PY_EVP_MD_fetch(algorithm, properties) EVP_get_digestbyname(algorithm) #define PY_EVP_MD_up_ref(md) do {} while(0) #define PY_EVP_MD_free(md) do {} while(0) #endif /* hash alias map and fast lookup * * Map between Python's preferred names and OpenSSL internal names. Maintain * cache of fetched EVP MD objects. The EVP_get_digestbyname() and * EVP_MD_fetch() API calls have a performance impact. * * The py_hashentry_t items are stored in a _Py_hashtable_t with py_name and * py_alias as keys. */ enum Py_hash_type { Py_ht_evp, // usedforsecurity=True / default Py_ht_evp_nosecurity, // usedforsecurity=False Py_ht_mac, // HMAC Py_ht_pbkdf2, // PKBDF2 }; typedef struct { const char *py_name; const char *py_alias; const char *ossl_name; int ossl_nid; int refcnt; PY_EVP_MD *evp; PY_EVP_MD *evp_nosecurity; } py_hashentry_t; // Fundamental to TLS, assumed always present in any libcrypto: #define Py_hash_md5 "md5" #define Py_hash_sha1 "sha1" #define Py_hash_sha224 "sha224" #define Py_hash_sha256 "sha256" #define Py_hash_sha384 "sha384" #define Py_hash_sha512 "sha512" // Not all OpenSSL-like libcrypto libraries provide these: #if defined(NID_sha512_224) # define Py_hash_sha512_224 "sha512_224" #endif #if defined(NID_sha512_256) # define Py_hash_sha512_256 "sha512_256" #endif #if defined(NID_sha3_224) # define Py_hash_sha3_224 "sha3_224" #endif #if defined(NID_sha3_256) # define Py_hash_sha3_256 "sha3_256" #endif #if defined(NID_sha3_384) # define Py_hash_sha3_384 "sha3_384" #endif #if defined(NID_sha3_512) # define Py_hash_sha3_512 "sha3_512" #endif #if defined(NID_shake128) # define Py_hash_shake_128 "shake_128" #endif #if defined(NID_shake256) # define Py_hash_shake_256 "shake_256" #endif #if defined(NID_blake2s256) # define Py_hash_blake2s "blake2s" #endif #if defined(NID_blake2b512) # define Py_hash_blake2b "blake2b" #endif #define PY_HASH_ENTRY(py_name, py_alias, ossl_name, ossl_nid) \ {py_name, py_alias, ossl_name, ossl_nid, 0, NULL, NULL} static const py_hashentry_t py_hashes[] = { /* md5 */ PY_HASH_ENTRY(Py_hash_md5, "MD5", SN_md5, NID_md5), /* sha1 */ PY_HASH_ENTRY(Py_hash_sha1, "SHA1", SN_sha1, NID_sha1), /* sha2 family */ PY_HASH_ENTRY(Py_hash_sha224, "SHA224", SN_sha224, NID_sha224), PY_HASH_ENTRY(Py_hash_sha256, "SHA256", SN_sha256, NID_sha256), PY_HASH_ENTRY(Py_hash_sha384, "SHA384", SN_sha384, NID_sha384), PY_HASH_ENTRY(Py_hash_sha512, "SHA512", SN_sha512, NID_sha512), /* truncated sha2 */ #ifdef Py_hash_sha512_224 PY_HASH_ENTRY(Py_hash_sha512_224, "SHA512_224", SN_sha512_224, NID_sha512_224), #endif #ifdef Py_hash_sha512_256 PY_HASH_ENTRY(Py_hash_sha512_256, "SHA512_256", SN_sha512_256, NID_sha512_256), #endif /* sha3 */ #ifdef Py_hash_sha3_224 PY_HASH_ENTRY(Py_hash_sha3_224, NULL, SN_sha3_224, NID_sha3_224), #endif #ifdef Py_hash_sha3_256 PY_HASH_ENTRY(Py_hash_sha3_256, NULL, SN_sha3_256, NID_sha3_256), #endif #ifdef Py_hash_sha3_384 PY_HASH_ENTRY(Py_hash_sha3_384, NULL, SN_sha3_384, NID_sha3_384), #endif #ifdef Py_hash_sha3_512 PY_HASH_ENTRY(Py_hash_sha3_512, NULL, SN_sha3_512, NID_sha3_512), #endif /* sha3 shake */ #ifdef Py_hash_shake_128 PY_HASH_ENTRY(Py_hash_shake_128, NULL, SN_shake128, NID_shake128), #endif #ifdef Py_hash_shake_256 PY_HASH_ENTRY(Py_hash_shake_256, NULL, SN_shake256, NID_shake256), #endif /* blake2 digest */ #ifdef Py_hash_blake2s PY_HASH_ENTRY(Py_hash_blake2s, "blake2s256", SN_blake2s256, NID_blake2s256), #endif #ifdef Py_hash_blake2b PY_HASH_ENTRY(Py_hash_blake2b, "blake2b512", SN_blake2b512, NID_blake2b512), #endif PY_HASH_ENTRY(NULL, NULL, NULL, 0), }; static Py_uhash_t py_hashentry_t_hash_name(const void *key) { return _Py_HashBytes(key, strlen((const char *)key)); } static int py_hashentry_t_compare_name(const void *key1, const void *key2) { return strcmp((const char *)key1, (const char *)key2) == 0; } static void py_hashentry_t_destroy_value(void *entry) { py_hashentry_t *h = (py_hashentry_t *)entry; if (--(h->refcnt) == 0) { if (h->evp != NULL) { PY_EVP_MD_free(h->evp); h->evp = NULL; } if (h->evp_nosecurity != NULL) { PY_EVP_MD_free(h->evp_nosecurity); h->evp_nosecurity = NULL; } PyMem_Free(entry); } } static _Py_hashtable_t * py_hashentry_table_new(void) { _Py_hashtable_t *ht = _Py_hashtable_new_full( py_hashentry_t_hash_name, py_hashentry_t_compare_name, NULL, py_hashentry_t_destroy_value, NULL ); if (ht == NULL) { return NULL; } for (const py_hashentry_t *h = py_hashes; h->py_name != NULL; h++) { py_hashentry_t *entry = (py_hashentry_t *)PyMem_Malloc(sizeof(py_hashentry_t)); if (entry == NULL) { goto error; } memcpy(entry, h, sizeof(py_hashentry_t)); if (_Py_hashtable_set(ht, (const void*)entry->py_name, (void*)entry) < 0) { PyMem_Free(entry); goto error; } entry->refcnt = 1; if (h->py_alias != NULL) { if (_Py_hashtable_set(ht, (const void*)entry->py_alias, (void*)entry) < 0) { /* entry is already in ht, will be freed by _Py_hashtable_destroy() */ goto error; } entry->refcnt++; } } return ht; error: _Py_hashtable_destroy(ht); return NULL; } /* Module state */ static PyModuleDef _hashlibmodule; typedef struct { PyTypeObject *EVPtype; PyTypeObject *HMACtype; #ifdef PY_OPENSSL_HAS_SHAKE PyTypeObject *EVPXOFtype; #endif PyObject *constructs; PyObject *unsupported_digestmod_error; _Py_hashtable_t *hashtable; } _hashlibstate; static inline _hashlibstate* get_hashlib_state(PyObject *module) { void *state = PyModule_GetState(module); assert(state != NULL); return (_hashlibstate *)state; } typedef struct { PyObject_HEAD EVP_MD_CTX *ctx; /* OpenSSL message digest context */ // Prevents undefined behavior via multiple threads entering the C API. bool use_mutex; PyMutex mutex; /* OpenSSL context lock */ } EVPobject; typedef struct { PyObject_HEAD HMAC_CTX *ctx; /* OpenSSL hmac context */ // Prevents undefined behavior via multiple threads entering the C API. bool use_mutex; PyMutex mutex; /* HMAC context lock */ } HMACobject; #include "clinic/_hashopenssl.c.h" /*[clinic input] module _hashlib class _hashlib.HASH "EVPobject *" "((_hashlibstate *)PyModule_GetState(module))->EVPtype" class _hashlib.HASHXOF "EVPobject *" "((_hashlibstate *)PyModule_GetState(module))->EVPXOFtype" class _hashlib.HMAC "HMACobject *" "((_hashlibstate *)PyModule_GetState(module))->HMACtype" [clinic start generated code]*/ /*[clinic end generated code: output=da39a3ee5e6b4b0d input=7df1bcf6f75cb8ef]*/ /* LCOV_EXCL_START */ /* Set an exception of given type using the given OpenSSL error code. */ static void set_ssl_exception_from_errcode(PyObject *exc, unsigned long errcode) { assert(errcode != 0); /* ERR_ERROR_STRING(3) ensures that the messages below are ASCII */ const char *lib = ERR_lib_error_string(errcode); const char *func = ERR_func_error_string(errcode); const char *reason = ERR_reason_error_string(errcode); if (lib && func) { PyErr_Format(exc, "[%s: %s] %s", lib, func, reason); } else if (lib) { PyErr_Format(exc, "[%s] %s", lib, reason); } else { PyErr_SetString(exc, reason); } } /* * Set an exception of given type. * * By default, the exception's message is constructed by using the last SSL * error that occurred. If no error occurred, the 'fallback_format' is used * to create a C-style formatted fallback message. */ static void raise_ssl_error(PyObject *exc, const char *fallback_format, ...) { assert(fallback_format != NULL); unsigned long errcode = ERR_peek_last_error(); if (errcode) { ERR_clear_error(); set_ssl_exception_from_errcode(exc, errcode); } else { va_list vargs; va_start(vargs, fallback_format); PyErr_FormatV(exc, fallback_format, vargs); va_end(vargs); } } /* * Set an exception with a generic default message after an error occurred. * * It can also be used without previous calls to SSL built-in functions, * in which case a generic error message is provided. */ static inline void notify_ssl_error_occurred(void) { raise_ssl_error(PyExc_ValueError, "no reason supplied"); } /* LCOV_EXCL_STOP */ static PyObject* py_digest_name(const EVP_MD *md) { assert(md != NULL); int nid = EVP_MD_nid(md); const char *name = NULL; const py_hashentry_t *h; for (h = py_hashes; h->py_name != NULL; h++) { if (h->ossl_nid == nid) { name = h->py_name; break; } } if (name == NULL) { /* Ignore aliased names and only use long, lowercase name. The aliases * pollute the list and OpenSSL appears to have its own definition of * alias as the resulting list still contains duplicate and alternate * names for several algorithms. */ name = OBJ_nid2ln(nid); if (name == NULL) name = OBJ_nid2sn(nid); } return PyUnicode_FromString(name); } /* Get EVP_MD by HID and purpose */ static PY_EVP_MD* py_digest_by_name(PyObject *module, const char *name, enum Py_hash_type py_ht) { PY_EVP_MD *digest = NULL; PY_EVP_MD *other_digest = NULL; _hashlibstate *state = get_hashlib_state(module); py_hashentry_t *entry = (py_hashentry_t *)_Py_hashtable_get( state->hashtable, (const void*)name ); if (entry != NULL) { switch (py_ht) { case Py_ht_evp: case Py_ht_mac: case Py_ht_pbkdf2: digest = FT_ATOMIC_LOAD_PTR_RELAXED(entry->evp); if (digest == NULL) { digest = PY_EVP_MD_fetch(entry->ossl_name, NULL); #ifdef Py_GIL_DISABLED // exchange just in case another thread did same thing at same time other_digest = _Py_atomic_exchange_ptr(&entry->evp, (void *)digest); #else entry->evp = digest; #endif } break; case Py_ht_evp_nosecurity: digest = FT_ATOMIC_LOAD_PTR_RELAXED(entry->evp_nosecurity); if (digest == NULL) { digest = PY_EVP_MD_fetch(entry->ossl_name, "-fips"); #ifdef Py_GIL_DISABLED // exchange just in case another thread did same thing at same time other_digest = _Py_atomic_exchange_ptr(&entry->evp_nosecurity, (void *)digest); #else entry->evp_nosecurity = digest; #endif } break; } // if another thread same thing at same time make sure we got same ptr assert(other_digest == NULL || other_digest == digest); if (digest != NULL) { if (other_digest == NULL) { PY_EVP_MD_up_ref(digest); } } } else { // Fall back for looking up an unindexed OpenSSL specific name. switch (py_ht) { case Py_ht_evp: case Py_ht_mac: case Py_ht_pbkdf2: digest = PY_EVP_MD_fetch(name, NULL); break; case Py_ht_evp_nosecurity: digest = PY_EVP_MD_fetch(name, "-fips"); break; } } if (digest == NULL) { raise_ssl_error(state->unsupported_digestmod_error, "unsupported hash type %s", name); return NULL; } return digest; } /* Get digest EVP from object * * * string * * _hashopenssl builtin function * * on error returns NULL with exception set. */ static PY_EVP_MD* py_digest_by_digestmod(PyObject *module, PyObject *digestmod, enum Py_hash_type py_ht) { PyObject *name_obj = NULL; const char *name; if (PyUnicode_Check(digestmod)) { name_obj = digestmod; } else { _hashlibstate *state = get_hashlib_state(module); // borrowed ref name_obj = PyDict_GetItemWithError(state->constructs, digestmod); } if (name_obj == NULL) { if (!PyErr_Occurred()) { _hashlibstate *state = get_hashlib_state(module); PyErr_Format( state->unsupported_digestmod_error, "Unsupported digestmod %R", digestmod); } return NULL; } name = PyUnicode_AsUTF8(name_obj); if (name == NULL) { return NULL; } return py_digest_by_name(module, name, py_ht); } static EVPobject * newEVPobject(PyTypeObject *type) { EVPobject *retval = (EVPobject *)PyObject_New(EVPobject, type); if (retval == NULL) { return NULL; } HASHLIB_INIT_MUTEX(retval); retval->ctx = EVP_MD_CTX_new(); if (retval->ctx == NULL) { Py_DECREF(retval); PyErr_NoMemory(); return NULL; } return retval; } static int EVP_hash(EVPobject *self, const void *vp, Py_ssize_t len) { unsigned int process; const unsigned char *cp = (const unsigned char *)vp; while (0 < len) { if (len > (Py_ssize_t)MUNCH_SIZE) process = MUNCH_SIZE; else process = Py_SAFE_DOWNCAST(len, Py_ssize_t, unsigned int); if (!EVP_DigestUpdate(self->ctx, (const void*)cp, process)) { notify_ssl_error_occurred(); return -1; } len -= process; cp += process; } return 0; } /* Internal methods for a hash object */ static void EVP_dealloc(EVPobject *self) { PyTypeObject *tp = Py_TYPE(self); EVP_MD_CTX_free(self->ctx); PyObject_Free(self); Py_DECREF(tp); } static int locked_EVP_MD_CTX_copy(EVP_MD_CTX *new_ctx_p, EVPobject *self) { int result; ENTER_HASHLIB(self); result = EVP_MD_CTX_copy(new_ctx_p, self->ctx); LEAVE_HASHLIB(self); return result; } /* External methods for a hash object */ /*[clinic input] _hashlib.HASH.copy as EVP_copy Return a copy of the hash object. [clinic start generated code]*/ static PyObject * EVP_copy_impl(EVPobject *self) /*[clinic end generated code: output=b370c21cdb8ca0b4 input=31455b6a3e638069]*/ { EVPobject *newobj; if ((newobj = newEVPobject(Py_TYPE(self))) == NULL) return NULL; if (!locked_EVP_MD_CTX_copy(newobj->ctx, self)) { Py_DECREF(newobj); notify_ssl_error_occurred(); return NULL; } return (PyObject *)newobj; } /*[clinic input] _hashlib.HASH.digest as EVP_digest Return the digest value as a bytes object. [clinic start generated code]*/ static PyObject * EVP_digest_impl(EVPobject *self) /*[clinic end generated code: output=0f6a3a0da46dc12d input=03561809a419bf00]*/ { unsigned char digest[EVP_MAX_MD_SIZE]; EVP_MD_CTX *temp_ctx; PyObject *retval; unsigned int digest_size; temp_ctx = EVP_MD_CTX_new(); if (temp_ctx == NULL) { PyErr_NoMemory(); return NULL; } if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) { goto error; } digest_size = EVP_MD_CTX_size(temp_ctx); if (!EVP_DigestFinal(temp_ctx, digest, NULL)) { goto error; } retval = PyBytes_FromStringAndSize((const char *)digest, digest_size); EVP_MD_CTX_free(temp_ctx); return retval; error: EVP_MD_CTX_free(temp_ctx); notify_ssl_error_occurred(); return NULL; } /*[clinic input] _hashlib.HASH.hexdigest as EVP_hexdigest Return the digest value as a string of hexadecimal digits. [clinic start generated code]*/ static PyObject * EVP_hexdigest_impl(EVPobject *self) /*[clinic end generated code: output=18e6decbaf197296 input=aff9cf0e4c741a9a]*/ { unsigned char digest[EVP_MAX_MD_SIZE]; EVP_MD_CTX *temp_ctx; unsigned int digest_size; temp_ctx = EVP_MD_CTX_new(); if (temp_ctx == NULL) { PyErr_NoMemory(); return NULL; } /* Get the raw (binary) digest value */ if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) { goto error; } digest_size = EVP_MD_CTX_size(temp_ctx); if (!EVP_DigestFinal(temp_ctx, digest, NULL)) { goto error; } EVP_MD_CTX_free(temp_ctx); return _Py_strhex((const char *)digest, (Py_ssize_t)digest_size); error: EVP_MD_CTX_free(temp_ctx); notify_ssl_error_occurred(); return NULL; } /*[clinic input] _hashlib.HASH.update as EVP_update obj: object / Update this hash object's state with the provided string. [clinic start generated code]*/ static PyObject * EVP_update(EVPobject *self, PyObject *obj) /*[clinic end generated code: output=ec1d55ed2432e966 input=9b30ec848f015501]*/ { int result; Py_buffer view; GET_BUFFER_VIEW_OR_ERROUT(obj, &view); if (!self->use_mutex && view.len >= HASHLIB_GIL_MINSIZE) { self->use_mutex = true; } if (self->use_mutex) { Py_BEGIN_ALLOW_THREADS PyMutex_Lock(&self->mutex); result = EVP_hash(self, view.buf, view.len); PyMutex_Unlock(&self->mutex); Py_END_ALLOW_THREADS } else { result = EVP_hash(self, view.buf, view.len); } PyBuffer_Release(&view); if (result == -1) return NULL; Py_RETURN_NONE; } static PyMethodDef EVP_methods[] = { EVP_UPDATE_METHODDEF EVP_DIGEST_METHODDEF EVP_HEXDIGEST_METHODDEF EVP_COPY_METHODDEF {NULL, NULL} /* sentinel */ }; static PyObject * EVP_get_block_size(EVPobject *self, void *closure) { long block_size; block_size = EVP_MD_CTX_block_size(self->ctx); return PyLong_FromLong(block_size); } static PyObject * EVP_get_digest_size(EVPobject *self, void *closure) { long size; size = EVP_MD_CTX_size(self->ctx); return PyLong_FromLong(size); } static PyObject * EVP_get_name(EVPobject *self, void *closure) { const EVP_MD *md = EVP_MD_CTX_md(self->ctx); if (md == NULL) { notify_ssl_error_occurred(); return NULL; } return py_digest_name(md); } static PyGetSetDef EVP_getseters[] = { {"digest_size", (getter)EVP_get_digest_size, NULL, NULL, NULL}, {"block_size", (getter)EVP_get_block_size, NULL, NULL, NULL}, {"name", (getter)EVP_get_name, NULL, NULL, PyDoc_STR("algorithm name.")}, {NULL} /* Sentinel */ }; static PyObject * EVP_repr(EVPobject *self) { PyObject *name_obj, *repr; name_obj = py_digest_name(EVP_MD_CTX_md(self->ctx)); if (!name_obj) { return NULL; } repr = PyUnicode_FromFormat("<%U %s object @ %p>", name_obj, Py_TYPE(self)->tp_name, self); Py_DECREF(name_obj); return repr; } PyDoc_STRVAR(hashtype_doc, "HASH(name, string=b\'\')\n" "--\n" "\n" "A hash is an object used to calculate a checksum of a string of information.\n" "\n" "Methods:\n" "\n" "update() -- updates the current digest with an additional string\n" "digest() -- return the current digest value\n" "hexdigest() -- return the current digest as a string of hexadecimal digits\n" "copy() -- return a copy of the current hash object\n" "\n" "Attributes:\n" "\n" "name -- the hash algorithm being used by this object\n" "digest_size -- number of bytes in this hashes output"); static PyType_Slot EVPtype_slots[] = { {Py_tp_dealloc, EVP_dealloc}, {Py_tp_repr, EVP_repr}, {Py_tp_doc, (char *)hashtype_doc}, {Py_tp_methods, EVP_methods}, {Py_tp_getset, EVP_getseters}, {0, 0}, }; static PyType_Spec EVPtype_spec = { "_hashlib.HASH", /*tp_name*/ sizeof(EVPobject), /*tp_basicsize*/ 0, /*tp_itemsize*/ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_DISALLOW_INSTANTIATION | Py_TPFLAGS_IMMUTABLETYPE, EVPtype_slots }; #ifdef PY_OPENSSL_HAS_SHAKE /*[clinic input] _hashlib.HASHXOF.digest as EVPXOF_digest length: Py_ssize_t Return the digest value as a bytes object. [clinic start generated code]*/ static PyObject * EVPXOF_digest_impl(EVPobject *self, Py_ssize_t length) /*[clinic end generated code: output=ef9320c23280efad input=816a6537cea3d1db]*/ { EVP_MD_CTX *temp_ctx; PyObject *retval = PyBytes_FromStringAndSize(NULL, length); if (retval == NULL) { return NULL; } temp_ctx = EVP_MD_CTX_new(); if (temp_ctx == NULL) { Py_DECREF(retval); PyErr_NoMemory(); return NULL; } if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) { goto error; } if (!EVP_DigestFinalXOF(temp_ctx, (unsigned char*)PyBytes_AS_STRING(retval), length)) { goto error; } EVP_MD_CTX_free(temp_ctx); return retval; error: Py_DECREF(retval); EVP_MD_CTX_free(temp_ctx); notify_ssl_error_occurred(); return NULL; } /*[clinic input] _hashlib.HASHXOF.hexdigest as EVPXOF_hexdigest length: Py_ssize_t Return the digest value as a string of hexadecimal digits. [clinic start generated code]*/ static PyObject * EVPXOF_hexdigest_impl(EVPobject *self, Py_ssize_t length) /*[clinic end generated code: output=eb3e6ee7788bf5b2 input=5f9d6a8f269e34df]*/ { unsigned char *digest; EVP_MD_CTX *temp_ctx; PyObject *retval; digest = (unsigned char*)PyMem_Malloc(length); if (digest == NULL) { PyErr_NoMemory(); return NULL; } temp_ctx = EVP_MD_CTX_new(); if (temp_ctx == NULL) { PyMem_Free(digest); PyErr_NoMemory(); return NULL; } /* Get the raw (binary) digest value */ if (!locked_EVP_MD_CTX_copy(temp_ctx, self)) { goto error; } if (!EVP_DigestFinalXOF(temp_ctx, digest, length)) { goto error; } EVP_MD_CTX_free(temp_ctx); retval = _Py_strhex((const char *)digest, length); PyMem_Free(digest); return retval; error: PyMem_Free(digest); EVP_MD_CTX_free(temp_ctx); notify_ssl_error_occurred(); return NULL; } static PyMethodDef EVPXOF_methods[] = { EVPXOF_DIGEST_METHODDEF EVPXOF_HEXDIGEST_METHODDEF {NULL, NULL} /* sentinel */ }; static PyObject * EVPXOF_get_digest_size(EVPobject *self, void *closure) { return PyLong_FromLong(0); } static PyGetSetDef EVPXOF_getseters[] = { {"digest_size", (getter)EVPXOF_get_digest_size, NULL, NULL, NULL}, {NULL} /* Sentinel */ }; PyDoc_STRVAR(hashxoftype_doc, "HASHXOF(name, string=b\'\')\n" "--\n" "\n" "A hash is an object used to calculate a checksum of a string of information.\n" "\n" "Methods:\n" "\n" "update() -- updates the current digest with an additional string\n" "digest(length) -- return the current digest value\n" "hexdigest(length) -- return the current digest as a string of hexadecimal digits\n" "copy() -- return a copy of the current hash object\n" "\n" "Attributes:\n" "\n" "name -- the hash algorithm being used by this object\n" "digest_size -- number of bytes in this hashes output"); static PyType_Slot EVPXOFtype_slots[] = { {Py_tp_doc, (char *)hashxoftype_doc}, {Py_tp_methods, EVPXOF_methods}, {Py_tp_getset, EVPXOF_getseters}, {0, 0}, }; static PyType_Spec EVPXOFtype_spec = { "_hashlib.HASHXOF", /*tp_name*/ sizeof(EVPobject), /*tp_basicsize*/ 0, /*tp_itemsize*/ Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_DISALLOW_INSTANTIATION | Py_TPFLAGS_IMMUTABLETYPE, EVPXOFtype_slots }; #endif static PyObject * _hashlib_HASH(PyObject *module, const char *digestname, PyObject *data_obj, int usedforsecurity) { Py_buffer view = { 0 }; PY_EVP_MD *digest = NULL; PyTypeObject *type; EVPobject *self = NULL; if (data_obj != NULL) { GET_BUFFER_VIEW_OR_ERROUT(data_obj, &view); } digest = py_digest_by_name( module, digestname, usedforsecurity ? Py_ht_evp : Py_ht_evp_nosecurity ); if (digest == NULL) { goto exit; } if ((EVP_MD_flags(digest) & EVP_MD_FLAG_XOF) == EVP_MD_FLAG_XOF) { type = get_hashlib_state(module)->EVPXOFtype; } else { type = get_hashlib_state(module)->EVPtype; } self = newEVPobject(type); if (self == NULL) { goto exit; } #if defined(EVP_MD_CTX_FLAG_NON_FIPS_ALLOW) && OPENSSL_VERSION_NUMBER < 0x30000000L // In OpenSSL 1.1.1 the non FIPS allowed flag is context specific while // in 3.0.0 it is a different EVP_MD provider. if (!usedforsecurity) { EVP_MD_CTX_set_flags(self->ctx, EVP_MD_CTX_FLAG_NON_FIPS_ALLOW); } #endif int result = EVP_DigestInit_ex(self->ctx, digest, NULL); if (!result) { notify_ssl_error_occurred(); Py_CLEAR(self); goto exit; } if (view.buf && view.len) { |
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