#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];
+extern const u8 zero_hash[SHA1_HASH_SIZE];
-static inline bool is_empty_file_hash(const u8 hash[SHA1_HASH_SIZE])
+static inline void copy_hash(u8 dest[SHA1_HASH_SIZE],
+ const u8 src[SHA1_HASH_SIZE])
{
- return memcmp(hash, empty_file_sha1sum, SHA1_HASH_SIZE) == 0;
+ memcpy(dest, src, SHA1_HASH_SIZE);
}
-/* Compute SHA1 message digest for bytes read from STREAM. The
- resulting message digest number will be written into the 20 bytes
- beginning at RESBLOCK. */
-extern int sha1_stream(FILE * stream, void *resblock);
+static inline void random_hash(u8 hash[SHA1_HASH_SIZE])
+{
+ randomize_byte_array(hash, SHA1_HASH_SIZE);
+}
-#ifdef WITH_LIBCRYPTO
-#include <openssl/sha.h>
-static inline void *sha1_buffer(const char *buffer, size_t len, void *resblock)
+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);
+}
+
+/* Prints a hash code field. */
+static inline void print_hash(const u8 hash[SHA1_HASH_SIZE])
+{
+ print_byte_field(hash, SHA1_HASH_SIZE);
+}
+
+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 (((u32*)hash)[i])
+ return false;
+ return true;
+}
+
+static inline void zero_out_hash(u8 hash[SHA1_HASH_SIZE])
{
- return SHA1(buffer, len, resblock);
+ memset(hash, 0, SHA1_HASH_SIZE);
}
-#else
-/* Compute SHA1 message digest for LEN bytes beginning at BUFFER. The
- result is always in little endian byte order, so that a byte-wise
- output yields to the wanted ASCII representation of the message
- digest. */
-extern void *sha1_buffer(const char *buffer, size_t len, void *resblock);
-#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 */