Merge branch 'master' of gitlab-gepasp.in.tum.de:gra22s/team199 into feat/-1
This commit is contained in:
commit
e965a9aca7
11 changed files with 196 additions and 18 deletions
2
Implementierung/.gitignore
vendored
2
Implementierung/.gitignore
vendored
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@ -1,3 +1,3 @@
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build
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md2
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testfile*
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t
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@ -1,10 +1,12 @@
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SRC = src/main.c src/helper.c src/io.c src/md2.c src/md2_impls/md2_common.c src/md2_impls/md2_0.c src/md2_impls/md2_2.c src/md2_impls/md2_1.c
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SRC = src/main.c src/helper.c src/io.c src/md2.c src/md2_impls/md2_common.c src/md2_impls/md2_0.c src/md2_impls/md2_1.c src/md2_impls/md2_2.c src/md2_impls/md2_3.c
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OBJ = ${subst src,build,${SRC:.c=.o}}
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CC = gcc
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CFLAGS = -Ilib -ggdb -std=c11 -g -Wall -Wextra -no-pie -O3
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LDFLAGS =
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CFLAGS = -Ilib -ggdb -std=c11 -g -Wall -Wextra -no-pie -O3
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LDFLAGS = -pthread
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TESTFILES = t/10000 t/1 t/10 t/100 t/1000 #t/2000 t/5000 t/10000
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TESTFILES_SIZES = ${subst t/,,${TESTFILES}}
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all: md2
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@ -18,9 +20,7 @@ help:
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@echo - all: build everything
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@echo - clean: clean distfiles
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@echo - help: show this help
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build:
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mkdir build
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@echo - benchmarks: run benchmarks (only works on linux!)
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build/%.o: src/%.c
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@mkdir -p build/md2_impls
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@ -29,4 +29,33 @@ build/%.o: src/%.c
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md2: ${OBJ}
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${CC} -o $@ $(OBJ) ${LDFLAGS}
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.PHONY: all clean help
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t/%:
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@echo
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@echo "=== Generating ${subst t/,,$@}MB of random data... ==="
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dd if=/dev/random of=$@ bs=1M count=${subst t/,,$@} status=progress
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@echo "=== done ==="
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@echo
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benchmarks.csv: md2 ${TESTFILES}
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@rm -f $@
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@for i in 0 2 3; do \
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echo ;\
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echo "=== Testing implementation $$i ===";\
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for t in $(TESTFILES_SIZES); do \
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echo -n "- with $${t}MB ... "; \
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if ! rr=$$(./md2 t/$${t} -B1 -V$${i}); then \
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echo; \
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echo "ERROR!"; \
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exit 1; \
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fi; \
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r=$$(echo $$rr | xargs | sed -e 's/.*took \(.*\) seconds.*/\1/'); \
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echo "$${r}s"; \
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echo "$${i};$${t};$${r}" >> $@; \
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done; \
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echo "=== done ===";\
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echo;\
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done
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benchmarks: benchmarks.csv
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.PHONY: all clean help benchmarks
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@ -9,6 +9,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/sysinfo.h>
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/**
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* @brief Open a file and load its stats
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@ -18,6 +18,5 @@
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* @param out
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*/
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void md2_hash_2(size_t len, const uint8_t buf[len], uint8_t out[16]);
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void md2_checksum_2(size_t len, uint8_t* buf);
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#endif // MD2_2_H
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22
Implementierung/lib/md2_impls/md2_3.h
Normal file
22
Implementierung/lib/md2_impls/md2_3.h
Normal file
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@ -0,0 +1,22 @@
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#ifndef MD2_3_H
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#define MD2_3_H
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#include <pthread.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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/**
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* @brief Diese Implementierung benutzt Threads zum Berechnen des Hashs
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*
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* @param len
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* @param buf
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* @param out
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*/
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void md2_hash_3(size_t len, const uint8_t buf[len], uint8_t out[16]);
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#endif // MD2_3_H
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@ -1,6 +1,7 @@
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#ifndef MD2_COMMON_H
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#define MD2_COMMON_H
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#include <errno.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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@ -33,9 +33,17 @@ uint8_t* read_file(const char* path, size_t* size) {
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return NULL;
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}
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struct sysinfo info;
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int r = sysinfo(&info);
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if (r != 0 || info.freeram < (unsigned long)statOfFile.st_size * 2) {
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errno = ENOMEM;
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return NULL;
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}
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uint8_t* data = malloc(statOfFile.st_size);
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if (data == NULL) {
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return;
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fclose(f);
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return NULL;
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}
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size_t bytesRead =
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@ -5,7 +5,6 @@
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#include "../lib/io.h"
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#include "../lib/md2.h"
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// Returns true when val is approx. equal to exp.
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static bool runTest(struct configuration* c, const char* message,
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const char* expectedHash) {
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uint8_t out[16];
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@ -140,8 +139,10 @@ int main(int argc, char** argv) {
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char hash[32];
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if (!calculate_hash(c, hash)) {
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if (errno != 0) {
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fprintf(stderr, "\n\033[0;31mAn error occured: %s\033[0m\n",
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fprintf(stderr, "\n\033[1;31mAn error occured: %s\033[0m\n",
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strerror(errno));
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if (errno == ENOMEM)
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fprintf(stderr, "\033[1;36mPlease try to use -V2!\033[0m\n");
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}
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return EXIT_FAILURE;
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}
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@ -4,6 +4,7 @@
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#include "../lib/md2_impls/md2_0.h"
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#include "../lib/md2_impls/md2_1.h"
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#include "../lib/md2_impls/md2_2.h"
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#include "../lib/md2_impls/md2_3.h"
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md2_hash_func md2_hash;
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md2_checksum_func md2_checksum;
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@ -31,7 +32,12 @@ bool md2_choose_implementation(int i) {
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case 2:
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md2_hash = md2_hash_2;
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md2_checksum = md2_checksum_2;
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md2_checksum = NULL;
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return true;
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case 3:
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md2_hash = md2_hash_3;
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md2_checksum = NULL;
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return true;
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default:
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@ -38,9 +38,6 @@ void apply_padding(size_t len, uint8_t buf[16]) {
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}
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}
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// unused!
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void md2_checksum_2(size_t, uint8_t*) {}
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void md2_hash_2(size_t len, const uint8_t buf[len], uint8_t out[16]) {
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FILE* file;
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struct stat file_stat;
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while (bytes_left_to_read != 0) {
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bytes_left_to_process = bytes_left_to_read >= 16 ? 16 : bytes_left_to_read;
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fread(data, 1, bytes_left_to_process, file);
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if (ferror(file) || feof(file)) {
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size_t size = fread(data, 1, bytes_left_to_process, file);
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if (size == 0 || ferror(file) || feof(file)) {
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if (errno == 0) errno = EIO;
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return;
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}
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114
Implementierung/src/md2_impls/md2_3.c
Normal file
114
Implementierung/src/md2_impls/md2_3.c
Normal file
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#include "../../lib/md2_impls/md2_3.h"
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#include "../../lib/md2_impls/md2_common.h"
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struct thread_args {
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size_t len;
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const uint8_t* buf;
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};
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void process_nothread_hash(size_t len, const uint8_t buf[len],
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uint8_t messageDigestBuf[48]) {
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for (size_t i = 0; i < (len + 16) / 16 - 1; i++) {
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for (int j = 0; j < 16; j++) {
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messageDigestBuf[16 + j] = buf[i * 16 + j];
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messageDigestBuf[32 + j] =
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(messageDigestBuf[16 + j] ^ messageDigestBuf[j]);
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}
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u_int8_t t = 0;
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for (int j = 0; j < 18; j++) {
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for (int k = 0; k < 48; k++) {
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t = messageDigestBuf[k] = messageDigestBuf[k] ^ MD2_PI_SUBST[t];
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}
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t = (t + j) % 256;
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}
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}
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}
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void* process_hash(void* threadArgs) {
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struct thread_args* args = (struct thread_args*)threadArgs;
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uint8_t* messageDigestBuf = calloc(48, sizeof(uint8_t));
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if (messageDigestBuf == NULL) {
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return NULL;
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}
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process_nothread_hash(args->len, args->buf, messageDigestBuf);
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pthread_exit(messageDigestBuf);
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}
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void* process_checksum(void* threasdArgs) {
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struct thread_args* args = (struct thread_args*)threasdArgs;
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uint8_t* checksum = calloc(16, sizeof(uint8_t));
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if (checksum == NULL) {
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return NULL;
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}
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uint8_t l = 0;
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for (size_t i = 0; i < args->len / 16; i++) {
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for (int j = 0; j < 16; j++) {
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u_int8_t c = args->buf[i * 16 + j];
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// reference is wrong. It says: Set C[j] to S[c xor L]. But it should be:
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l = checksum[j] ^= MD2_PI_SUBST[c ^ l];
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}
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}
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pthread_exit(checksum);
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}
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void md2_hash_3(size_t len, const uint8_t buf[len], uint8_t out[16]) {
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int paddingNeeded = 16 - (len % 16);
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uint8_t originalPadding = paddingNeeded;
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len += paddingNeeded;
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uint8_t* newBuf = calloc(len + 16, sizeof(uint8_t));
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if (newBuf == NULL) {
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return;
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}
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memcpy(newBuf, buf, len - paddingNeeded);
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while (paddingNeeded > 0) {
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newBuf[len - paddingNeeded] = originalPadding;
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paddingNeeded--;
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}
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pthread_t thread_1, thread_2;
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struct thread_args thread_args = {len, newBuf};
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if (pthread_create(&thread_1, NULL, process_hash, (void*)&thread_args) != 0) {
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printf("Error creating thread 1\n");
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if (errno == 0) errno = EAGAIN;
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return;
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}
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if (pthread_create(&thread_2, NULL, process_checksum, (void*)&thread_args) !=
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0) {
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printf("Error creating thread 2\n");
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if (errno == 0) errno = EAGAIN;
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return;
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}
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u_int8_t* messageDigestBuf;
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u_int8_t* checksum;
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if (pthread_join(thread_1, (void**)&messageDigestBuf) != 0) {
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printf("Error joining thread 1\n");
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if (errno == 0) errno = EINVAL;
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return;
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}
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if (pthread_join(thread_2, (void**)&checksum) != 0) {
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printf("Error joining thread 2\n");
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if (errno == 0) errno = EINVAL;
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return;
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}
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process_nothread_hash(16, checksum, messageDigestBuf);
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memcpy(out, messageDigestBuf, 16);
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free(messageDigestBuf);
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free(checksum);
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}
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