getentropy on Windows. It compiles but has not been thoroughly tested yet.

OK: beck@

diff --git a/lib/libcrypto/arc4random/getentropy_win.c b/lib/libcrypto/arc4random/getentropy_win.c
new file mode 100644 (file)
index 0000000..4dde4a5
--- /dev/null
+++ b/lib/libcrypto/arc4random/getentropy_win.c
@@ -0,0 +1,56 @@
+/*     $OpenBSD: getentropy_win.c,v 1.1 2014/07/12 20:54:49 wouter Exp $       */
+
+/*
+ * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org> 
+ * Copyright (c) 2014, Bob Beck <beck@obtuse.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <windows.h>
+#include <errno.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <wincrypt.h>
+#include <process.h>
+
+int    getentropy(void *buf, size_t len);
+
+/*
+ * On Windows, CryptGenRandom is supposed to be a well-seeded
+ * cryptographically strong random number generator.
+ */
+int
+getentropy(void *buf, size_t len)
+{
+       HCRYPTPROV provider;
+
+       if (len > 256) {
+               errno = EIO;
+               return -1;
+       }
+
+       if (CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
+           CRYPT_VERIFYCONTEXT) != 0)
+               goto fail;
+       if (CryptGenRandom(provider, len, buf) != 0) {
+               CryptReleaseContext(provider, 0);
+               goto fail;
+       }
+       CryptReleaseContext(provider, 0);
+       return (0);
+
+fail:
+       errno = EIO;
+       return (-1);
+}

diff --git a/lib/libcrypto/crypto/getentropy_win.c b/lib/libcrypto/crypto/getentropy_win.c
new file mode 100644 (file)
index 0000000..4dde4a5
--- /dev/null
+++ b/lib/libcrypto/crypto/getentropy_win.c
@@ -0,0 +1,56 @@
+/*     $OpenBSD: getentropy_win.c,v 1.1 2014/07/12 20:54:49 wouter Exp $       */
+
+/*
+ * Copyright (c) 2014, Theo de Raadt <deraadt@openbsd.org> 
+ * Copyright (c) 2014, Bob Beck <beck@obtuse.com>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <windows.h>
+#include <errno.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <wincrypt.h>
+#include <process.h>
+
+int    getentropy(void *buf, size_t len);
+
+/*
+ * On Windows, CryptGenRandom is supposed to be a well-seeded
+ * cryptographically strong random number generator.
+ */
+int
+getentropy(void *buf, size_t len)
+{
+       HCRYPTPROV provider;
+
+       if (len > 256) {
+               errno = EIO;
+               return -1;
+       }
+
+       if (CryptAcquireContext(&provider, NULL, NULL, PROV_RSA_FULL,
+           CRYPT_VERIFYCONTEXT) != 0)
+               goto fail;
+       if (CryptGenRandom(provider, len, buf) != 0) {
+               CryptReleaseContext(provider, 0);
+               goto fail;
+       }
+       CryptReleaseContext(provider, 0);
+       return (0);
+
+fail:
+       errno = EIO;
+       return (-1);
+}