1 files changed, 165 insertions, 0 deletions
diff --git a/lib/util/digest.c b/lib/util/digest.c
new file mode 100644
index 0000000..b48bc48
--- /dev/null
+++ b/lib/util/digest.c
@@ -0,0 +1,165 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2013-2018 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 <stdlib.h>
+#if defined(HAVE_STDINT_H)
+# include <stdint.h>
+#elif defined(HAVE_INTTYPES_H)
+# include <inttypes.h>
+#endif
+#include <unistd.h>
+#include <errno.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_digest.h"
+
+#ifdef HAVE_SHA224UPDATE
+# include <sha2.h>
+#else
+# include "compat/sha2.h"
+#endif
+
+static struct digest_function {
+    const unsigned int digest_len;
+    void (*init)(SHA2_CTX *);
+#ifdef SHA2_VOID_PTR
+    void (*update)(SHA2_CTX *, const void *, size_t);
+    void (*final)(void *, SHA2_CTX *);
+#else
+    void (*update)(SHA2_CTX *, const unsigned char *, size_t);
+    void (*final)(unsigned char *, SHA2_CTX *);
+#endif
+} digest_functions[] = {
+    {
+	SHA224_DIGEST_LENGTH,
+	SHA224Init,
+	SHA224Update,
+	SHA224Final
+    }, {
+	SHA256_DIGEST_LENGTH,
+	SHA256Init,
+	SHA256Update,
+	SHA256Final
+    }, {
+	SHA384_DIGEST_LENGTH,
+	SHA384Init,
+	SHA384Update,
+	SHA384Final
+    }, {
+	SHA512_DIGEST_LENGTH,
+	SHA512Init,
+	SHA512Update,
+	SHA512Final
+    }, {
+	0
+    }
+};
+
+struct sudo_digest {
+    struct digest_function *func;
+    SHA2_CTX ctx;
+};
+
+struct sudo_digest *
+sudo_digest_alloc_v1(int digest_type)
+{
+    debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL);
+    struct digest_function *func = NULL;
+    struct sudo_digest *dig;
+    int i;
+
+    for (i = 0; digest_functions[i].digest_len != 0; i++) {
+	if (digest_type == i) {
+	    func = &digest_functions[i];
+	    break;
+	}
+    }
+    if (func == NULL) {
+	errno = EINVAL;
+	debug_return_ptr(NULL);
+    }
+
+    if ((dig = malloc(sizeof(*dig))) == NULL)
+	debug_return_ptr(NULL);
+    func->init(&dig->ctx);
+    dig->func = func;
+
+    debug_return_ptr(dig);
+}
+
+void
+sudo_digest_free_v1(struct sudo_digest *dig)
+{
+    debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL);
+
+    free(dig);
+
+    debug_return;
+}
+
+void
+sudo_digest_reset_v1(struct sudo_digest *dig)
+{
+    debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL);
+
+    dig->func->init(&dig->ctx);
+
+    debug_return;
+}
+
+int
+sudo_digest_getlen_v1(int digest_type)
+{
+    debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL);
+    int i;
+
+    for (i = 0; digest_functions[i].digest_len != 0; i++) {
+	if (digest_type == i)
+	    debug_return_int(digest_functions[i].digest_len);
+    }
+
+    debug_return_int(-1);
+}
+
+void
+sudo_digest_update_v1(struct sudo_digest *dig, const void *data, size_t len)
+{
+    debug_decl(sudo_digest_update, SUDO_DEBUG_UTIL);
+
+    dig->func->update(&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);
+
+    dig->func->final(md, &dig->ctx);
+
+    debug_return;
+}