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-rw-r--r--lib/util/digest_openssl.c152
1 files changed, 152 insertions, 0 deletions
diff --git a/lib/util/digest_openssl.c b/lib/util/digest_openssl.c
new file mode 100644
index 0000000..20be734
--- /dev/null
+++ b/lib/util/digest_openssl.c
@@ -0,0 +1,152 @@
+/*
+ * SPDX-License-Identifier: ISC
+ *
+ * Copyright (c) 2013-2021 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>
+#include <errno.h>
+
+#if defined(HAVE_WOLFSSL)
+# include <wolfssl/options.h>
+#endif
+#include <openssl/evp.h>
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_digest.h"
+
+struct sudo_digest {
+ EVP_MD_CTX *ctx;
+ const EVP_MD *md;
+};
+
+static const EVP_MD *
+sudo_digest_type_to_md(int digest_type)
+{
+ const EVP_MD *md = NULL;
+ debug_decl(sudo_digest_type_to_md, SUDO_DEBUG_UTIL);
+
+ switch (digest_type) {
+ case SUDO_DIGEST_SHA224:
+ md = EVP_sha224();
+ break;
+ case SUDO_DIGEST_SHA256:
+ md = EVP_sha256();
+ break;
+ case SUDO_DIGEST_SHA384:
+ md = EVP_sha384();
+ break;
+ case SUDO_DIGEST_SHA512:
+ md = EVP_sha512();
+ break;
+ default:
+ errno = EINVAL;
+ break;
+ }
+ debug_return_const_ptr(md);
+}
+
+struct sudo_digest *
+sudo_digest_alloc_v1(int digest_type)
+{
+ struct sudo_digest *dig;
+ EVP_MD_CTX *mdctx = NULL;
+ const EVP_MD *md;
+ debug_decl(sudo_digest_alloc, SUDO_DEBUG_UTIL);
+
+ md = sudo_digest_type_to_md(digest_type);
+ if (md == NULL)
+ goto bad;
+
+ mdctx = EVP_MD_CTX_new();
+ if (mdctx == NULL || !EVP_DigestInit_ex(mdctx, md, NULL))
+ goto bad;
+
+ if ((dig = malloc(sizeof(*dig))) == NULL)
+ goto bad;
+ dig->md = md;
+ dig->ctx = mdctx;
+
+ debug_return_ptr(dig);
+bad:
+ EVP_MD_CTX_free(mdctx);
+ debug_return_ptr(NULL);
+}
+
+void
+sudo_digest_free_v1(struct sudo_digest *dig)
+{
+ debug_decl(sudo_digest_free, SUDO_DEBUG_UTIL);
+
+ if (dig != NULL) {
+ EVP_MD_CTX_free(dig->ctx);
+ free(dig);
+ }
+
+ debug_return;
+}
+
+void
+sudo_digest_reset_v1(struct sudo_digest *dig)
+{
+ debug_decl(sudo_digest_reset, SUDO_DEBUG_UTIL);
+
+ /* These cannot fail. */
+ EVP_MD_CTX_reset(dig->ctx);
+ EVP_DigestInit_ex(dig->ctx, dig->md, NULL);
+
+ debug_return;
+}
+
+int
+sudo_digest_getlen_v1(int digest_type)
+{
+ const EVP_MD *md;
+ debug_decl(sudo_digest_getlen, SUDO_DEBUG_UTIL);
+
+ md = sudo_digest_type_to_md(digest_type);
+ if (md == NULL)
+ debug_return_int(-1);
+
+ debug_return_int(EVP_MD_size(md));
+}
+
+void
+sudo_digest_update_v1(struct sudo_digest *dig, const void *data, size_t len)
+{
+ debug_decl(sudo_digest_update, SUDO_DEBUG_UTIL);
+
+ EVP_DigestUpdate(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);
+
+ EVP_DigestFinal_ex(dig->ctx, md, NULL);
+
+ debug_return;
+}