Refactor headers

[wimlib] / include / wimlib / sha1.h

diff --git a/include/wimlib/sha1.h b/include/wimlib/sha1.h
new file mode 100644 (file)
index 0000000..1f7c50f
--- /dev/null
+++ b/include/wimlib/sha1.h
@@ -0,0 +1,95 @@
+#ifndef _WIMLIB_SHA1_H
+#define _WIMLIB_SHA1_H
+
+#include "wimlib/types.h"
+#include "wimlib/util.h"
+
+#include <string.h>
+
+#define SHA1_HASH_SIZE 20
+
+extern const u8 zero_hash[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 void
+random_hash(u8 hash[SHA1_HASH_SIZE])
+{
+       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);
+}
+
+static inline void
+print_hash(const u8 hash[SHA1_HASH_SIZE], FILE *out)
+{
+       print_byte_field(hash, SHA1_HASH_SIZE, out);
+}
+
+static inline bool
+is_zero_hash(const u8 hash[SHA1_HASH_SIZE])
+{
+       if (hash)
+               for (u8 i = 0; i < SHA1_HASH_SIZE / 4; i++)
+                       if (((const u32*)hash)[i])
+                               return false;
+       return true;
+}
+
+static inline void
+zero_out_hash(u8 hash[SHA1_HASH_SIZE])
+{
+       memset(hash, 0, SHA1_HASH_SIZE);
+}
+
+
+#ifdef WITH_LIBCRYPTO
+
+#include <openssl/sha.h>
+static inline void
+sha1_buffer(const void *buffer, size_t len, u8 hash[SHA1_HASH_SIZE])
+{
+       SHA1(buffer, len, hash);
+}
+#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 void *buffer, size_t len, u8 hash[SHA1_HASH_SIZE]);
+
+extern void
+sha1_init(SHA_CTX *ctx);
+
+extern void
+sha1_update(SHA_CTX *ctx, const void *data, size_t len);
+
+extern void
+sha1_final(u8 hash[SHA1_HASH_SIZE], SHA_CTX *ctx);
+
+#endif /* !WITH_LIBCRYPTO */
+
+#endif /* _WIMLIB_SHA1_H */