X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=src%2Fsha1.h;h=a5d695d65a633d5e01428d56659b3067ea1e0f89;hb=9dffaa1a9f8a067ac9e9ac2bad19851b604f8545;hp=69398ceb0f59b2c5c12481d9a3b75c7a1f56b992;hpb=604aaba2df983e5490ac76f58a8803dc352b85f3;p=wimlib

diff --git a/src/sha1.h b/src/sha1.h
index 69398ceb..a5d695d6 100644
--- a/src/sha1.h
+++ b/src/sha1.h
@@ -5,27 +5,77 @@
 #include <stdio.h>
 #include <stddef.h>
 #include "string.h"
+#include "util.h"
 
 #define SHA1_HASH_SIZE 20
 
-extern const u8 empty_file_sha1sum[SHA1_HASH_SIZE];
+static inline void copy_hash(u8 dest[SHA1_HASH_SIZE],
+			     const u8 src[SHA1_HASH_SIZE])
+{
+	memcpy(dest, src, SHA1_HASH_SIZE);
+}
 
-static inline bool is_empty_file_hash(const u8 hash[SHA1_HASH_SIZE])
+static inline void random_hash(u8 hash[SHA1_HASH_SIZE])
 {
-	return memcmp(hash, empty_file_sha1sum, SHA1_HASH_SIZE) == 0;
+	randomize_byte_array(hash, SHA1_HASH_SIZE);
 }
 
+static inline bool hashes_equal(const u8 h1[SHA1_HASH_SIZE],
+				const u8 h2[SHA1_HASH_SIZE])
+{
+	return memcmp(h1, h2, SHA1_HASH_SIZE) == 0;
+}
+static inline int hashes_cmp(const u8 h1[SHA1_HASH_SIZE],
+			     const u8 h2[SHA1_HASH_SIZE])
+{
+	return memcmp(h1, h2, SHA1_HASH_SIZE);
+}
 
-extern int sha1sum(const char *filename, void *md);
+/* Prints a hash code field. */
+static inline void print_hash(const u8 hash[SHA1_HASH_SIZE])
+{
+	print_byte_field(hash, SHA1_HASH_SIZE);
+}
 
-#ifdef WITH_LIBCRYPTO
-#include <openssl/sha.h>
-static inline void sha1_buffer(const void *buffer, size_t len, void *md)
+static inline bool is_zero_hash(const u8 hash[SHA1_HASH_SIZE])
+{
+	for (u8 i = 0; i < SHA1_HASH_SIZE / 4; i++)
+		if (((u32*)hash)[i])
+			return false;
+	return true;
+}
+
+static void zero_hash(u8 hash[SHA1_HASH_SIZE])
 {
-	SHA1(buffer, len, md);
+	memset(hash, 0, SHA1_HASH_SIZE);
 }
-#else
-extern void sha1_buffer(const void *buffer, size_t len, void *md);
-#endif
+
+
+#ifdef WITH_LIBCRYPTO
+
+#include <openssl/sha.h>
+#define sha1_buffer   SHA1
+#define sha1_init     SHA1_Init
+#define sha1_update   SHA1_Update
+#define sha1_final    SHA1_Final
+
+#else /* WITH_LIBCRYPTO */
+
+typedef struct {
+    u32 state[5];
+    u32 count[2];
+    u8  buffer[64];
+} SHA_CTX;
+
+extern void sha1_buffer(const u8 buffer[], size_t len, u8 hash[SHA1_HASH_SIZE]);
+extern void sha1_init(SHA_CTX *ctx);
+extern void sha1_update(SHA_CTX *ctx, const u8 data[], size_t len);
+extern void sha1_final(u8 hash[SHA1_HASH_SIZE], SHA_CTX *ctx);
+
+#endif /* !WITH_LIBCRYPTO */
+
+extern int sha1sum(const char *filename, u8 hash[SHA1_HASH_SIZE]);
+
+
 
 #endif /* _WIMLIB_SHA1_H */