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-rw-r--r--crypto/siphash/siphash_pmeth.c205
1 files changed, 205 insertions, 0 deletions
diff --git a/crypto/siphash/siphash_pmeth.c b/crypto/siphash/siphash_pmeth.c
new file mode 100644
index 000000000000..66e552fec5e5
--- /dev/null
+++ b/crypto/siphash/siphash_pmeth.c
@@ -0,0 +1,205 @@
+/*
+ * Copyright 2007-2018 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/x509.h>
+#include <openssl/x509v3.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+#include "internal/siphash.h"
+#include "siphash_local.h"
+#include "internal/evp_int.h"
+
+/* SIPHASH pkey context structure */
+
+typedef struct siphash_pkey_ctx_st {
+ ASN1_OCTET_STRING ktmp; /* Temp storage for key */
+ SIPHASH ctx;
+} SIPHASH_PKEY_CTX;
+
+static int pkey_siphash_init(EVP_PKEY_CTX *ctx)
+{
+ SIPHASH_PKEY_CTX *pctx;
+
+ if ((pctx = OPENSSL_zalloc(sizeof(*pctx))) == NULL) {
+ CRYPTOerr(CRYPTO_F_PKEY_SIPHASH_INIT, ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ pctx->ktmp.type = V_ASN1_OCTET_STRING;
+
+ EVP_PKEY_CTX_set_data(ctx, pctx);
+ EVP_PKEY_CTX_set0_keygen_info(ctx, NULL, 0);
+ return 1;
+}
+
+static void pkey_siphash_cleanup(EVP_PKEY_CTX *ctx)
+{
+ SIPHASH_PKEY_CTX *pctx = EVP_PKEY_CTX_get_data(ctx);
+
+ if (pctx != NULL) {
+ OPENSSL_clear_free(pctx->ktmp.data, pctx->ktmp.length);
+ OPENSSL_clear_free(pctx, sizeof(*pctx));
+ EVP_PKEY_CTX_set_data(ctx, NULL);
+ }
+}
+
+static int pkey_siphash_copy(EVP_PKEY_CTX *dst, EVP_PKEY_CTX *src)
+{
+ SIPHASH_PKEY_CTX *sctx, *dctx;
+
+ /* allocate memory for dst->data and a new SIPHASH_CTX in dst->data->ctx */
+ if (!pkey_siphash_init(dst))
+ return 0;
+ sctx = EVP_PKEY_CTX_get_data(src);
+ dctx = EVP_PKEY_CTX_get_data(dst);
+ if (ASN1_STRING_get0_data(&sctx->ktmp) != NULL &&
+ !ASN1_STRING_copy(&dctx->ktmp, &sctx->ktmp)) {
+ /* cleanup and free the SIPHASH_PKEY_CTX in dst->data */
+ pkey_siphash_cleanup(dst);
+ return 0;
+ }
+ memcpy(&dctx->ctx, &sctx->ctx, sizeof(SIPHASH));
+ return 1;
+}
+
+static int pkey_siphash_keygen(EVP_PKEY_CTX *ctx, EVP_PKEY *pkey)
+{
+ ASN1_OCTET_STRING *key;
+ SIPHASH_PKEY_CTX *pctx = EVP_PKEY_CTX_get_data(ctx);
+
+ if (ASN1_STRING_get0_data(&pctx->ktmp) == NULL)
+ return 0;
+ key = ASN1_OCTET_STRING_dup(&pctx->ktmp);
+ if (key == NULL)
+ return 0;
+ return EVP_PKEY_assign_SIPHASH(pkey, key);
+}
+
+static int int_update(EVP_MD_CTX *ctx, const void *data, size_t count)
+{
+ SIPHASH_PKEY_CTX *pctx = EVP_PKEY_CTX_get_data(EVP_MD_CTX_pkey_ctx(ctx));
+
+ SipHash_Update(&pctx->ctx, data, count);
+ return 1;
+}
+
+static int siphash_signctx_init(EVP_PKEY_CTX *ctx, EVP_MD_CTX *mctx)
+{
+ SIPHASH_PKEY_CTX *pctx = EVP_PKEY_CTX_get_data(ctx);
+ const unsigned char* key;
+ size_t len;
+
+ key = EVP_PKEY_get0_siphash(EVP_PKEY_CTX_get0_pkey(ctx), &len);
+ if (key == NULL || len != SIPHASH_KEY_SIZE)
+ return 0;
+ EVP_MD_CTX_set_flags(mctx, EVP_MD_CTX_FLAG_NO_INIT);
+ EVP_MD_CTX_set_update_fn(mctx, int_update);
+ return SipHash_Init(&pctx->ctx, key, 0, 0);
+}
+static int siphash_signctx(EVP_PKEY_CTX *ctx, unsigned char *sig, size_t *siglen,
+ EVP_MD_CTX *mctx)
+{
+ SIPHASH_PKEY_CTX *pctx = ctx->data;
+
+ *siglen = SipHash_hash_size(&pctx->ctx);
+ if (sig != NULL)
+ return SipHash_Final(&pctx->ctx, sig, *siglen);
+ return 1;
+}
+
+static int pkey_siphash_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
+{
+ SIPHASH_PKEY_CTX *pctx = EVP_PKEY_CTX_get_data(ctx);
+ const unsigned char *key;
+ size_t len;
+
+ switch (type) {
+
+ case EVP_PKEY_CTRL_MD:
+ /* ignore */
+ break;
+
+ case EVP_PKEY_CTRL_SET_DIGEST_SIZE:
+ return SipHash_set_hash_size(&pctx->ctx, p1);
+
+ case EVP_PKEY_CTRL_SET_MAC_KEY:
+ case EVP_PKEY_CTRL_DIGESTINIT:
+ if (type == EVP_PKEY_CTRL_SET_MAC_KEY) {
+ /* user explicitly setting the key */
+ key = p2;
+ len = p1;
+ } else {
+ /* user indirectly setting the key via EVP_DigestSignInit */
+ key = EVP_PKEY_get0_siphash(EVP_PKEY_CTX_get0_pkey(ctx), &len);
+ }
+ if (key == NULL || len != SIPHASH_KEY_SIZE ||
+ !ASN1_OCTET_STRING_set(&pctx->ktmp, key, len))
+ return 0;
+ /* use default rounds (2,4) */
+ return SipHash_Init(&pctx->ctx, ASN1_STRING_get0_data(&pctx->ktmp),
+ 0, 0);
+
+ default:
+ return -2;
+
+ }
+ return 1;
+}
+
+static int pkey_siphash_ctrl_str(EVP_PKEY_CTX *ctx,
+ const char *type, const char *value)
+{
+ if (value == NULL)
+ return 0;
+ if (strcmp(type, "digestsize") == 0) {
+ size_t hash_size = atoi(value);
+
+ return pkey_siphash_ctrl(ctx, EVP_PKEY_CTRL_SET_DIGEST_SIZE, hash_size,
+ NULL);
+ }
+ if (strcmp(type, "key") == 0)
+ return EVP_PKEY_CTX_str2ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, value);
+ if (strcmp(type, "hexkey") == 0)
+ return EVP_PKEY_CTX_hex2ctrl(ctx, EVP_PKEY_CTRL_SET_MAC_KEY, value);
+ return -2;
+}
+
+const EVP_PKEY_METHOD siphash_pkey_meth = {
+ EVP_PKEY_SIPHASH,
+ EVP_PKEY_FLAG_SIGCTX_CUSTOM, /* we don't deal with a separate MD */
+ pkey_siphash_init,
+ pkey_siphash_copy,
+ pkey_siphash_cleanup,
+
+ 0, 0,
+
+ 0,
+ pkey_siphash_keygen,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ siphash_signctx_init,
+ siphash_signctx,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ 0, 0,
+
+ pkey_siphash_ctrl,
+ pkey_siphash_ctrl_str
+};