Adding upstream version 1:9.2p1.upstream/1%9.2p1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 207 insertions, 0 deletions

diff --git a/digest-openssl.c b/digest-openssl.c
new file mode 100644
index 0000000..e073a80
--- /dev/null
+++ b/digest-openssl.c
@@ -0,0 +1,207 @@
+/* $OpenBSD: digest-openssl.c,v 1.9 2020/10/29 02:52:43 djm Exp $ */
+/*
+ * Copyright (c) 2013 Damien Miller <djm@mindrot.org>
+ *
+ * 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 "includes.h"
+
+#ifdef WITH_OPENSSL
+
+#include <sys/types.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <openssl/evp.h>
+
+#include "openbsd-compat/openssl-compat.h"
+
+#include "sshbuf.h"
+#include "digest.h"
+#include "ssherr.h"
+
+#ifndef HAVE_EVP_SHA256
+# define EVP_sha256 NULL
+#endif
+#ifndef HAVE_EVP_SHA384
+# define EVP_sha384 NULL
+#endif
+#ifndef HAVE_EVP_SHA512
+# define EVP_sha512 NULL
+#endif
+
+struct ssh_digest_ctx {
+	int alg;
+	EVP_MD_CTX *mdctx;
+};
+
+struct ssh_digest {
+	int id;
+	const char *name;
+	size_t digest_len;
+	const EVP_MD *(*mdfunc)(void);
+};
+
+/* NB. Indexed directly by algorithm number */
+const struct ssh_digest digests[] = {
+	{ SSH_DIGEST_MD5,	"MD5",		16,	EVP_md5 },
+	{ SSH_DIGEST_SHA1,	"SHA1",		20,	EVP_sha1 },
+	{ SSH_DIGEST_SHA256,	"SHA256",	32,	EVP_sha256 },
+	{ SSH_DIGEST_SHA384,	"SHA384",	48,	EVP_sha384 },
+	{ SSH_DIGEST_SHA512,	"SHA512",	64,	EVP_sha512 },
+	{ -1,			NULL,		0,	NULL },
+};
+
+static const struct ssh_digest *
+ssh_digest_by_alg(int alg)
+{
+	if (alg < 0 || alg >= SSH_DIGEST_MAX)
+		return NULL;
+	if (digests[alg].id != alg) /* sanity */
+		return NULL;
+	if (digests[alg].mdfunc == NULL)
+		return NULL;
+	return &(digests[alg]);
+}
+
+int
+ssh_digest_alg_by_name(const char *name)
+{
+	int alg;
+
+	for (alg = 0; digests[alg].id != -1; alg++) {
+		if (strcasecmp(name, digests[alg].name) == 0)
+			return digests[alg].id;
+	}
+	return -1;
+}
+
+const char *
+ssh_digest_alg_name(int alg)
+{
+	const struct ssh_digest *digest = ssh_digest_by_alg(alg);
+
+	return digest == NULL ? NULL : digest->name;
+}
+
+size_t
+ssh_digest_bytes(int alg)
+{
+	const struct ssh_digest *digest = ssh_digest_by_alg(alg);
+
+	return digest == NULL ? 0 : digest->digest_len;
+}
+
+size_t
+ssh_digest_blocksize(struct ssh_digest_ctx *ctx)
+{
+	return EVP_MD_CTX_block_size(ctx->mdctx);
+}
+
+struct ssh_digest_ctx *
+ssh_digest_start(int alg)
+{
+	const struct ssh_digest *digest = ssh_digest_by_alg(alg);
+	struct ssh_digest_ctx *ret;
+
+	if (digest == NULL || ((ret = calloc(1, sizeof(*ret))) == NULL))
+		return NULL;
+	ret->alg = alg;
+	if ((ret->mdctx = EVP_MD_CTX_new()) == NULL) {
+		free(ret);
+		return NULL;
+	}
+	if (EVP_DigestInit_ex(ret->mdctx, digest->mdfunc(), NULL) != 1) {
+		ssh_digest_free(ret);
+		return NULL;
+	}
+	return ret;
+}
+
+int
+ssh_digest_copy_state(struct ssh_digest_ctx *from, struct ssh_digest_ctx *to)
+{
+	if (from->alg != to->alg)
+		return SSH_ERR_INVALID_ARGUMENT;
+	/* we have bcopy-style order while openssl has memcpy-style */
+	if (!EVP_MD_CTX_copy_ex(to->mdctx, from->mdctx))
+		return SSH_ERR_LIBCRYPTO_ERROR;
+	return 0;
+}
+
+int
+ssh_digest_update(struct ssh_digest_ctx *ctx, const void *m, size_t mlen)
+{
+	if (EVP_DigestUpdate(ctx->mdctx, m, mlen) != 1)
+		return SSH_ERR_LIBCRYPTO_ERROR;
+	return 0;
+}
+
+int
+ssh_digest_update_buffer(struct ssh_digest_ctx *ctx, const struct sshbuf *b)
+{
+	return ssh_digest_update(ctx, sshbuf_ptr(b), sshbuf_len(b));
+}
+
+int
+ssh_digest_final(struct ssh_digest_ctx *ctx, u_char *d, size_t dlen)
+{
+	const struct ssh_digest *digest = ssh_digest_by_alg(ctx->alg);
+	u_int l = dlen;
+
+	if (digest == NULL || dlen > UINT_MAX)
+		return SSH_ERR_INVALID_ARGUMENT;
+	if (dlen < digest->digest_len) /* No truncation allowed */
+		return SSH_ERR_INVALID_ARGUMENT;
+	if (EVP_DigestFinal_ex(ctx->mdctx, d, &l) != 1)
+		return SSH_ERR_LIBCRYPTO_ERROR;
+	if (l != digest->digest_len) /* sanity */
+		return SSH_ERR_INTERNAL_ERROR;
+	return 0;
+}
+
+void
+ssh_digest_free(struct ssh_digest_ctx *ctx)
+{
+	if (ctx == NULL)
+		return;
+	EVP_MD_CTX_free(ctx->mdctx);
+	freezero(ctx, sizeof(*ctx));
+}
+
+int
+ssh_digest_memory(int alg, const void *m, size_t mlen, u_char *d, size_t dlen)
+{
+	const struct ssh_digest *digest = ssh_digest_by_alg(alg);
+	u_int mdlen;
+
+	if (digest == NULL)
+		return SSH_ERR_INVALID_ARGUMENT;
+	if (dlen > UINT_MAX)
+		return SSH_ERR_INVALID_ARGUMENT;
+	if (dlen < digest->digest_len)
+		return SSH_ERR_INVALID_ARGUMENT;
+	mdlen = dlen;
+	if (!EVP_Digest(m, mlen, d, &mdlen, digest->mdfunc(), NULL))
+		return SSH_ERR_LIBCRYPTO_ERROR;
+	return 0;
+}
+
+int
+ssh_digest_buffer(int alg, const struct sshbuf *b, u_char *d, size_t dlen)
+{
+	return ssh_digest_memory(alg, sshbuf_ptr(b), sshbuf_len(b), d, dlen);
+}
+#endif /* WITH_OPENSSL */