X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=include%2Fwimlib%2Fsha1.h;h=91f84d9168baca324b879127a1b1be722c314a49;hb=HEAD;hp=05650e06d4a5bca0f541bf2b6b11485cf7bed293;hpb=f18b7fc3361c4daac0ddd104af65a8eff8466fec;p=wimlib

diff --git a/include/wimlib/sha1.h b/include/wimlib/sha1.h
index 05650e06..91f84d91 100644
--- a/include/wimlib/sha1.h
+++ b/include/wimlib/sha1.h
@@ -1,8 +1,28 @@
 /*
  * sha1.h
  *
- * The author dedicates this file to the public domain.
- * You can do whatever you want with this file.
+ * Copyright 2022-2023 Eric Biggers
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
  */
 
 #ifndef _WIMLIB_SHA1_H
@@ -13,12 +33,32 @@
 #include "wimlib/types.h"
 #include "wimlib/util.h"
 
-#define SHA1_HASH_SIZE 20
+#define SHA1_HASH_SIZE	20
+#define SHA1_BLOCK_SIZE	64
+
+struct sha1_ctx {
+	u64 bytecount;
+	u32 h[5];
+	u8 buffer[SHA1_BLOCK_SIZE];
+};
+
+void
+sha1_init(struct sha1_ctx *ctx);
+
+void
+sha1_update(struct sha1_ctx *ctx, const void *data, size_t len);
+
+void
+sha1_final(struct sha1_ctx *ctx, u8 hash[SHA1_HASH_SIZE]);
+
+void
+sha1(const void *data, size_t len, u8 hash[SHA1_HASH_SIZE]);
 
 extern const u8 zero_hash[SHA1_HASH_SIZE];
 
-extern void
-sprint_hash(const u8 hash[SHA1_HASH_SIZE], tchar strbuf[SHA1_HASH_SIZE * 2 + 1]);
+#define SHA1_HASH_STRING_LEN	(2 * SHA1_HASH_SIZE + 1)
+void
+sprint_hash(const u8 hash[SHA1_HASH_SIZE], tchar strbuf[SHA1_HASH_STRING_LEN]);
 
 static inline void
 copy_hash(u8 dest[SHA1_HASH_SIZE], const u8 src[SHA1_HASH_SIZE])
@@ -26,12 +66,6 @@ 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 int
 hashes_cmp(const u8 h1[SHA1_HASH_SIZE], const u8 h2[SHA1_HASH_SIZE])
 {
@@ -47,49 +81,7 @@ hashes_equal(const u8 h1[SHA1_HASH_SIZE], const u8 h2[SHA1_HASH_SIZE])
 static inline bool
 is_zero_hash(const u8 *hash)
 {
-	return (hash == zero_hash || hashes_equal(hash, zero_hash));
-}
-
-static inline void
-zero_out_hash(u8 hash[SHA1_HASH_SIZE])
-{
-	copy_hash(hash, zero_hash);
-}
-
-#ifdef WITH_LIBCRYPTO
-
-#include <openssl/sha.h>
-
-#define sha1_init     SHA1_Init
-#define sha1_update   SHA1_Update
-#define sha1_final    SHA1_Final
-
-static inline void
-sha1_buffer(const void *buffer, size_t len, u8 hash[SHA1_HASH_SIZE])
-{
-	SHA1(buffer, len, hash);
+	return hash == zero_hash || hashes_equal(hash, zero_hash);
 }
 
-#else /* WITH_LIBCRYPTO */
-
-typedef struct {
-	u64 bytecount;
-	u32 state[5];
-	u8 buffer[64];
-} SHA_CTX;
-
-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);
-
-extern void
-sha1_buffer(const void *buffer, size_t len, u8 hash[SHA1_HASH_SIZE]);
-
-#endif /* !WITH_LIBCRYPTO */
-
 #endif /* _WIMLIB_SHA1_H */