ff736a61bb
Because many of the hash-functions implemented by LTC use the length of the input when padding the input out to a block-length, LTC keeps track of the input length in a 64-bit integer. However, it did not previously test for overflow of this value. Since many of the hash-functions implemented by LTC are defined for inputs of length 2^128 bits or more, this means that LTC was incorrectly implementing these hash functions for extremely long inputs. Also, this might have been a minor security problem: A clever attacker might have been able to take a message with a known hash and find another message (longer by 2^64 bits) that would be hashed to the same value by LTC. Fortunately, LTC uses a pre-processor macro to make the actual code for hashing, and so this problem could be fixed by adding an overflow-check to that macro.
91 lines
2.5 KiB
C
91 lines
2.5 KiB
C
#ifndef TOMCRYPT_H_
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#define TOMCRYPT_H_
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <time.h>
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#include <ctype.h>
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#include <limits.h>
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/* use configuration data */
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#include <tomcrypt_custom.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* version */
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#define CRYPT 0x0117
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#define SCRYPT "1.17"
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/* max size of either a cipher/hash block or symmetric key [largest of the two] */
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#define MAXBLOCKSIZE 128
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/* descriptor table size */
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#define TAB_SIZE 32
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/* error codes [will be expanded in future releases] */
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enum {
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CRYPT_OK=0, /* Result OK */
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CRYPT_ERROR, /* Generic Error */
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CRYPT_NOP, /* Not a failure but no operation was performed */
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CRYPT_INVALID_KEYSIZE, /* Invalid key size given */
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CRYPT_INVALID_ROUNDS, /* Invalid number of rounds */
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CRYPT_FAIL_TESTVECTOR, /* Algorithm failed test vectors */
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CRYPT_BUFFER_OVERFLOW, /* Not enough space for output */
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CRYPT_INVALID_PACKET, /* Invalid input packet given */
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CRYPT_INVALID_PRNGSIZE, /* Invalid number of bits for a PRNG */
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CRYPT_ERROR_READPRNG, /* Could not read enough from PRNG */
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CRYPT_INVALID_CIPHER, /* Invalid cipher specified */
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CRYPT_INVALID_HASH, /* Invalid hash specified */
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CRYPT_INVALID_PRNG, /* Invalid PRNG specified */
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CRYPT_MEM, /* Out of memory */
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CRYPT_PK_TYPE_MISMATCH, /* Not equivalent types of PK keys */
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CRYPT_PK_NOT_PRIVATE, /* Requires a private PK key */
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CRYPT_INVALID_ARG, /* Generic invalid argument */
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CRYPT_FILE_NOTFOUND, /* File Not Found */
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CRYPT_PK_INVALID_TYPE, /* Invalid type of PK key */
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CRYPT_PK_INVALID_SYSTEM,/* Invalid PK system specified */
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CRYPT_PK_DUP, /* Duplicate key already in key ring */
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CRYPT_PK_NOT_FOUND, /* Key not found in keyring */
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CRYPT_PK_INVALID_SIZE, /* Invalid size input for PK parameters */
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CRYPT_INVALID_PRIME_SIZE,/* Invalid size of prime requested */
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CRYPT_PK_INVALID_PADDING, /* Invalid padding on input */
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CRYPT_HASH_OVERFLOW /* Hash applied to too many bits */
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};
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#include <tomcrypt_cfg.h>
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#include <tomcrypt_macros.h>
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#include <tomcrypt_cipher.h>
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#include <tomcrypt_hash.h>
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#include <tomcrypt_mac.h>
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#include <tomcrypt_prng.h>
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#include <tomcrypt_pk.h>
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#include <tomcrypt_math.h>
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#include <tomcrypt_misc.h>
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#include <tomcrypt_argchk.h>
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#include <tomcrypt_pkcs.h>
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#ifdef __cplusplus
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}
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#endif
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#endif /* TOMCRYPT_H_ */
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/* $Source$ */
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/* $Revision$ */
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/* $Date$ */
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