support --without-openssl at configure time

Disables and removes dependency on OpenSSL. Many features don't
work and the set of crypto options is greatly restricted. This
will only work on system with native arc4random or /dev/urandom.

Considered highly experimental for now.

1 files changed, 58 insertions, 0 deletions

diff --git a/openbsd-compat/sha1.h b/openbsd-compat/sha1.h
new file mode 100644
index 000000000..327d94cd5
--- /dev/null
+++ b/openbsd-compat/sha1.h
@@ -0,0 +1,58 @@
+/*      $OpenBSD: sha1.h,v 1.24 2012/12/05 23:19:57 deraadt Exp $       */
+
+/*
+ * SHA-1 in C
+ * By Steve Reid <steve@edmweb.com>
+ * 100% Public Domain
+ */
+
+#ifndef _SHA1_H
+#define _SHA1_H
+
+#ifndef WITH_OPENSSL
+
+#define SHA1_BLOCK_LENGTH               64
+#define SHA1_DIGEST_LENGTH              20
+#define SHA1_DIGEST_STRING_LENGTH       (SHA1_DIGEST_LENGTH * 2 + 1)
+
+typedef struct {
+    u_int32_t state[5];
+    u_int64_t count;
+    u_int8_t buffer[SHA1_BLOCK_LENGTH];
+} SHA1_CTX;
+
+void SHA1Init(SHA1_CTX *);
+void SHA1Pad(SHA1_CTX *);
+void SHA1Transform(u_int32_t [5], const u_int8_t [SHA1_BLOCK_LENGTH])
+        __attribute__((__bounded__(__minbytes__,1,5)))
+        __attribute__((__bounded__(__minbytes__,2,SHA1_BLOCK_LENGTH)));
+void SHA1Update(SHA1_CTX *, const u_int8_t *, size_t)
+        __attribute__((__bounded__(__string__,2,3)));
+void SHA1Final(u_int8_t [SHA1_DIGEST_LENGTH], SHA1_CTX *)
+        __attribute__((__bounded__(__minbytes__,1,SHA1_DIGEST_LENGTH)));
+char *SHA1End(SHA1_CTX *, char *)
+        __attribute__((__bounded__(__minbytes__,2,SHA1_DIGEST_STRING_LENGTH)));
+char *SHA1File(const char *, char *)
+        __attribute__((__bounded__(__minbytes__,2,SHA1_DIGEST_STRING_LENGTH)));
+char *SHA1FileChunk(const char *, char *, off_t, off_t)
+        __attribute__((__bounded__(__minbytes__,2,SHA1_DIGEST_STRING_LENGTH)));
+char *SHA1Data(const u_int8_t *, size_t, char *)
+        __attribute__((__bounded__(__string__,1,2)))
+        __attribute__((__bounded__(__minbytes__,3,SHA1_DIGEST_STRING_LENGTH)));
+
+#define HTONDIGEST(x) do {                                              \
+        x[0] = htonl(x[0]);                                             \
+        x[1] = htonl(x[1]);                                             \
+        x[2] = htonl(x[2]);                                             \
+        x[3] = htonl(x[3]);                                             \
+        x[4] = htonl(x[4]); } while (0)
+
+#define NTOHDIGEST(x) do {                                              \
+        x[0] = ntohl(x[0]);                                             \
+        x[1] = ntohl(x[1]);                                             \
+        x[2] = ntohl(x[2]);                                             \
+        x[3] = ntohl(x[3]);                                             \
+        x[4] = ntohl(x[4]); } while (0)
+
+#endif /* !WITH_OPENSSL */
+#endif /* _SHA1_H */