cryptopals_c

commit 9fa92a533c32c17354fee573638b41920f24551f
parent ebd62e982ee37128d8ddbd85b3c1fca17b209106
Author: anna <anna@brokenlove.online>
Date:   Fri, 26 Jul 2024 23:01:19 +0200

style fixup

Diffstat:
M
.gitignore
 | 
0

M
s1/build.sh
 | 
6
++----
M
s1/c1.c
 | 
65
++++++++++++++++++++++++++++++++---------------------------------
M
s1/c2.c
 | 
7
+++----

4 files changed, 37 insertions(+), 41 deletions(-)
diff --git a/.gitignore b/.gitignore
diff --git a/s1/build.sh b/s1/build.sh
@@ -1,8 +1,6 @@
-#!/bin/zsh
-
-source ~/.zshrc
+#!/bin/sh
 
 for filename in *.c; do
     echo "compiling $filename"
-    cc -o "bin/$(basename $filename .c)" $filename
+    gcc -lba -o "bin/$(basename $filename .c)" $filename
 done
diff --git a/s1/c1.c b/s1/c1.c
@@ -4,44 +4,43 @@
 
 static int hex_to_base64(const char* hex, char** b64)
 {
-    const char b64table[] =
-        "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+	const char b64table[] =
+		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
 
-    int length = strlen(hex);
-    int block_count = length / 6;
-    int res_length = block_count*4;
-    int leftover_length = length % 6;
-    if(leftover_length%2 == 1) {
-        fprintf(stderr, "bad sequence length\n");
-        return -1;
-    }
+	int length = strlen(hex);
+	int block_count = length / 6;
+	int res_length = block_count*4;
+	int leftover_length = length % 6;
+	if (leftover_length%2 == 1) {
+		fprintf(stderr, "bad sequence length\n");
+		return -1;
+	}
 
-    char * res = (char*)(malloc(sizeof(char)*res_length+2));
+	char * res = (char*)(malloc(sizeof(char)*res_length+2));
 
-    for(int i = 0; i < block_count+(leftover_length != 0); i++) {
-        int end_ix = i < block_count ? 6 : leftover_length;
-        char block[6+1];
-        memcpy(block, hex+(6*i), end_ix);
-        block[end_ix] = '\0';
-        
-        int block_hex = strtol(block, NULL, 16);
-        block_hex <<= 4*(6-end_ix);
-        
-        for(int j = 0; j < 4; j++) {
-            char b64 = b64table[(block_hex >> 6*(3-j))& 0x3f];
-            res[4*i+j] = j <= end_ix/2 ? b64 : '=';
-        }
-    }
-    *b64 = res;
-    return 0;
+	for (int i = 0; i < block_count+(leftover_length != 0); i++) {
+		int end_ix = i < block_count ? 6 : leftover_length;
+		char block[6+1];
+		memcpy(block, hex+(6*i), end_ix);
+		block[end_ix] = '\0';
+
+		int block_hex = strtol(block, NULL, 16);
+		block_hex <<= 4*(6-end_ix);
+
+		for (int j = 0; j < 4; j++) {
+			char b64 = b64table[(block_hex >> 6*(3-j))& 0x3f];
+			res[4*i+j] = j <= end_ix/2 ? b64 : '=';
+		}
+	}
+	*b64 = res;
+	return 0;
 }
 
 int main(int argc, char* argv[]) 
 {
-    char* b64;
-    int ret = hex_to_base64(argv[1], &b64);
-    if(ret == 0) {
-        printf("%s\n", b64);
-    }
-    return 0;
+	char* b64;
+	int ret = hex_to_base64(argv[1], &b64);
+	if (ret == 0)
+		printf("%s\n", b64);
+	return 0;
 }
diff --git a/s1/c2.c b/s1/c2.c
@@ -1,14 +1,13 @@
-#include <ba/ba.h> /* see my tools repo for this */
+#include <ba.h> /* see my tools repo for this */
 
 int main(int argc, char* argv[]) {
-    if(argc != 3) {
+    if(argc != 3)
         return -1;
-    }
     ba* a;
     ba* b;
     a = ba_from_hex(argv[1]);
     b = ba_from_hex(argv[2]);
-    if(a == NULL || b == NULL) {
+    if (a == NULL || b == NULL) {
         return -1;
     }
     ba_xor(a, b);