1 files changed, 153 insertions, 0 deletions
diff --git a/lib/util/digest_gcrypt.c b/lib/util/digest_gcrypt.c
new file mode 100644
index 0000000..7d12fe2
--- /dev/null
+++ b/lib/util/digest_gcrypt.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (c) 2017-2018 Todd C. Miller <Todd.Miller@sudo.ws>
+ *
+ * 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.
+ */
+
+/*
+ * This is an open source non-commercial project. Dear PVS-Studio, please check it.
+ * PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+ */
+
+#include <config.h>
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif /* HAVE_STRING_H */
+#ifdef HAVE_STRINGS_H
+# include <strings.h>
+#endif /* HAVE_STRINGS_H */
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <gcrypt.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_digest.h"
+
+struct sudo_digest {
+    int gcry_digest_type;
+    unsigned int digest_len;
+    gcry_md_hd_t ctx;
+};
+
+/* Map sudo digest type to gcrypt digest type. */
+static int
+sudo_digest_type_to_gcry(int digest_type)
+{
+    switch (digest_type) {
+    case SUDO_DIGEST_SHA224:
+	return GCRY_MD_SHA224;
+	break;
+    case SUDO_DIGEST_SHA256:
+	return GCRY_MD_SHA256;
+	break;
+    case SUDO_DIGEST_SHA384:
+	return GCRY_MD_SHA384;
+	break;
+    case SUDO_DIGEST_SHA512:
+	return GCRY_MD_SHA512;
+	break;
+    default:
+	return -1;
+    }
+}
+
+struct sudo_digest *
+sudo_digest_alloc_v1(int digest_type)
+{
+    debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL)
+    struct sudo_digest *dig;
+    int gcry_digest_type;
+
+    gcry_digest_type = sudo_digest_type_to_gcry(digest_type);
+    if (gcry_digest_type == -1) {
+	errno = EINVAL;
+	debug_return_ptr(NULL);
+    }
+
+    if ((dig = malloc(sizeof(*dig))) == NULL)
+	debug_return_ptr(NULL);
+    dig->gcry_digest_type = gcry_digest_type;
+    dig->digest_len = gcry_md_get_algo_dlen(gcry_digest_type);
+
+    if (gcry_md_open(&dig->ctx, gcry_digest_type, 0) != 0) {
+	free(dig);
+	debug_return_ptr(NULL);
+    }
+
+    debug_return_ptr(dig);
+}
+
+void
+sudo_digest_free_v1(struct sudo_digest *dig)
+{
+    debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL)
+
+    if (dig != NULL) {
+	gcry_md_close(dig->ctx);
+	free(dig);
+    }
+
+    debug_return;
+}
+
+void
+sudo_digest_reset_v1(struct sudo_digest *dig)
+{
+    debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL)
+
+    gcry_md_reset(dig->ctx);
+
+    debug_return;
+}
+
+int
+sudo_digest_getlen_v1(int digest_type)
+{
+    debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL)
+    int gcry_digest_type;
+
+    gcry_digest_type = sudo_digest_type_to_gcry(digest_type);
+    if (gcry_digest_type == -1)
+	debug_return_int(-1);
+
+    debug_return_int(gcry_md_get_algo_dlen(gcry_digest_type));
+}
+
+void
+sudo_digest_update_v1(struct sudo_digest *dig, const void *data, size_t len)
+{
+    debug_decl(sudo_digest_update, SUDO_DEBUG_UTIL)
+
+    gcry_md_write(dig->ctx, data, len);
+
+    debug_return;
+}
+
+void
+sudo_digest_final_v1(struct sudo_digest *dig, unsigned char *md)
+{
+    debug_decl(sudo_digest_final, SUDO_DEBUG_UTIL)
+
+    gcry_md_final(dig->ctx);
+    memcpy(md, gcry_md_read(dig->ctx, 0), dig->digest_len);
+
+    debug_return;
+}