add crc32

src/headers/tomcrypt_custom.h

@@ -432,6 +432,8 @@
 
 #define LTC_ADLER32
 
+#define LTC_CRC32
+
 #endif /* LTC_NO_MISC */
 
 /* cleanup */

src/headers/tomcrypt_misc.h

@@ -81,6 +81,18 @@ void adler32_finish(adler32_state *ctx, void *hash, unsigned long size);
 int adler32_test(void);
 #endif
 
+#ifdef LTC_CRC32
+typedef struct crc32_state_s
+{
+   ulong32 crc;
+} crc32_state;
+
+void crc32_init(crc32_state *ctx);
+void crc32_update(crc32_state *ctx, const unsigned char *input, unsigned long length);
+void crc32_finish(crc32_state *ctx, void *hash, unsigned long size);
+int crc32_test(void);
+#endif
+
 /* yeah it's not exactly in misc in the library, but in testprof/x86_prof.c */
 #if defined(LTC_TEST) && defined(LTC_TEST_DBG)
 void print_hex(const char* what, const unsigned char* p, const unsigned long l);