tests: updated SHA1 test

* added new testcase with 128 'a'
* added check that SHA1 functions don't change original strings

tests/test_sha1.c

@@ -4,26 +4,30 @@
 /* gcc -o test_sha1 -I./src tests/test_sha1.c src/sha1.c */
 
 #include <stdio.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "sha1.h"
+#include "test.h"
 
 /* Test Vectors (from FIPS PUB 180-1) */
 static char *test_data[] = {
     "abc",
     "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq",
-    "A million repetitions of 'a'"};
+    "A million repetitions of 'a'",
+    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+                    "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"};
 static char *test_results[] = {
     "A9993E36 4706816A BA3E2571 7850C26C 9CD0D89D",
     "84983E44 1C3BD26E BAAE4AA1 F95129E5 E54670F1",
-    "34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F"};
-    
+    "34AA973C D4C4DAA4 F61EEB2B DBAD2731 6534016F",
+    "AD5B3FDB CB526778 C2839D2F 151EA753 995E26A0"};
 
 static void digest_to_hex(const uint8_t *digest, char *output)
 {
     int i,j;
     char *c = output;
-    
+
     for (i = 0; i < SHA1_DIGEST_SIZE/4; i++) {
         for (j = 0; j < 4; j++) {
             sprintf(c,"%02X", digest[i*4+j]);
@@ -34,17 +38,23 @@ static void digest_to_hex(const uint8_t *digest, char *output)
     }
     *(c - 1) = '\0';
 }
-    
+
 int main(int argc, char** argv)
 {
     int k;
     SHA1_CTX context;
     uint8_t digest[20];
     char output[80];
+    char *copy;
 
     fprintf(stdout, "verifying SHA-1 implementation... ");
-    
-    for (k = 0; k < 2; k++){ 
+
+    for (k = 0; k < ARRAY_SIZE(test_data); k++){
+        if (k == 2) {
+            /* this case will be checked below */
+            continue;
+        }
+        copy = strdup(test_data[k]);
         crypto_SHA1_Init(&context);
         crypto_SHA1_Update(&context, (uint8_t*)test_data[k],
                            strlen(test_data[k]));
@@ -57,7 +67,13 @@ int main(int argc, char** argv)
             fprintf(stderr,"\t%s returned\n", output);
             fprintf(stderr,"\t%s is correct\n", test_results[k]);
             return (1);
-        }    
+        }
+        if (strcmp(copy, test_data[k])) {
+            fprintf(stdout, "FAIL\n");
+            fprintf(stdout, "* original string was changed by SHA1\n");
+            return (1);
+        }
+	free(copy);
     }
     /* million 'a' vector we feed separately */
     crypto_SHA1_Init(&context);