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Diffstat (limited to 'third_party/git/sha1dc/sha1.h')
| -rw-r--r-- | third_party/git/sha1dc/sha1.h | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/third_party/git/sha1dc/sha1.h b/third_party/git/sha1dc/sha1.h deleted file mode 100644 index 1e4e94be54a6..000000000000 --- a/third_party/git/sha1dc/sha1.h +++ /dev/null @@ -1,110 +0,0 @@ -/*** -* Copyright 2017 Marc Stevens <marc@marc-stevens.nl>, Dan Shumow <danshu@microsoft.com> -* Distributed under the MIT Software License. -* See accompanying file LICENSE.txt or copy at -* https://opensource.org/licenses/MIT -***/ - -#ifndef SHA1DC_SHA1_H -#define SHA1DC_SHA1_H - -#if defined(__cplusplus) -extern "C" { -#endif - -#ifndef SHA1DC_NO_STANDARD_INCLUDES -#include <stdint.h> -#endif - -/* sha-1 compression function that takes an already expanded message, and additionally store intermediate states */ -/* only stores states ii (the state between step ii-1 and step ii) when DOSTORESTATEii is defined in ubc_check.h */ -void sha1_compression_states(uint32_t[5], const uint32_t[16], uint32_t[80], uint32_t[80][5]); - -/* -// Function type for sha1_recompression_step_T (uint32_t ihvin[5], uint32_t ihvout[5], const uint32_t me2[80], const uint32_t state[5]). -// Where 0 <= T < 80 -// me2 is an expanded message (the expansion of an original message block XOR'ed with a disturbance vector's message block difference.) -// state is the internal state (a,b,c,d,e) before step T of the SHA-1 compression function while processing the original message block. -// The function will return: -// ihvin: The reconstructed input chaining value. -// ihvout: The reconstructed output chaining value. -*/ -typedef void(*sha1_recompression_type)(uint32_t*, uint32_t*, const uint32_t*, const uint32_t*); - -/* A callback function type that can be set to be called when a collision block has been found: */ -/* void collision_block_callback(uint64_t byteoffset, const uint32_t ihvin1[5], const uint32_t ihvin2[5], const uint32_t m1[80], const uint32_t m2[80]) */ -typedef void(*collision_block_callback)(uint64_t, const uint32_t*, const uint32_t*, const uint32_t*, const uint32_t*); - -/* The SHA-1 context. */ -typedef struct { - uint64_t total; - uint32_t ihv[5]; - unsigned char buffer[64]; - int found_collision; - int safe_hash; - int detect_coll; - int ubc_check; - int reduced_round_coll; - collision_block_callback callback; - - uint32_t ihv1[5]; - uint32_t ihv2[5]; - uint32_t m1[80]; - uint32_t m2[80]; - uint32_t states[80][5]; -} SHA1_CTX; - -/* Initialize SHA-1 context. */ -void SHA1DCInit(SHA1_CTX*); - -/* - Function to enable safe SHA-1 hashing: - Collision attacks are thwarted by hashing a detected near-collision block 3 times. - Think of it as extending SHA-1 from 80-steps to 240-steps for such blocks: - The best collision attacks against SHA-1 have complexity about 2^60, - thus for 240-steps an immediate lower-bound for the best cryptanalytic attacks would be 2^180. - An attacker would be better off using a generic birthday search of complexity 2^80. - - Enabling safe SHA-1 hashing will result in the correct SHA-1 hash for messages where no collision attack was detected, - but it will result in a different SHA-1 hash for messages where a collision attack was detected. - This will automatically invalidate SHA-1 based digital signature forgeries. - Enabled by default. -*/ -void SHA1DCSetSafeHash(SHA1_CTX*, int); - -/* - Function to disable or enable the use of Unavoidable Bitconditions (provides a significant speed up). - Enabled by default - */ -void SHA1DCSetUseUBC(SHA1_CTX*, int); - -/* - Function to disable or enable the use of Collision Detection. - Enabled by default. - */ -void SHA1DCSetUseDetectColl(SHA1_CTX*, int); - -/* function to disable or enable the detection of reduced-round SHA-1 collisions */ -/* disabled by default */ -void SHA1DCSetDetectReducedRoundCollision(SHA1_CTX*, int); - -/* function to set a callback function, pass NULL to disable */ -/* by default no callback set */ -void SHA1DCSetCallback(SHA1_CTX*, collision_block_callback); - -/* update SHA-1 context with buffer contents */ -void SHA1DCUpdate(SHA1_CTX*, const char*, size_t); - -/* obtain SHA-1 hash from SHA-1 context */ -/* returns: 0 = no collision detected, otherwise = collision found => warn user for active attack */ -int SHA1DCFinal(unsigned char[20], SHA1_CTX*); - -#if defined(__cplusplus) -} -#endif - -#ifdef SHA1DC_CUSTOM_TRAILING_INCLUDE_SHA1_H -#include SHA1DC_CUSTOM_TRAILING_INCLUDE_SHA1_H -#endif - -#endif |