1 files changed, 190 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/picotls/lib/uecc.c b/web/server/h2o/libh2o/deps/picotls/lib/uecc.c
new file mode 100644
index 00000000..10f32520
--- /dev/null
+++ b/web/server/h2o/libh2o/deps/picotls/lib/uecc.c
@@ -0,0 +1,190 @@
+/*
+ * Copyright (c) 2016 DeNA Co., Ltd., Kazuho Oku
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef _WINDOWS
+#include "wincompat.h"
+#else
+#include <unistd.h>
+#endif
+#include "sha2.h"
+#include "uECC.h"
+#include "uECC_vli.h"
+#include "picotls.h"
+#include "picotls/minicrypto.h"
+
+#define TYPE_UNCOMPRESSED_PUBLIC_KEY 4
+
+struct st_secp256r1_key_exhchange_t {
+    ptls_key_exchange_context_t super;
+    uint8_t priv[SECP256R1_PRIVATE_KEY_SIZE];
+    uint8_t pub[SECP256R1_PUBLIC_KEY_SIZE];
+};
+
+static int secp256r1_on_exchange(ptls_key_exchange_context_t **_ctx, ptls_iovec_t *secret, ptls_iovec_t peerkey)
+{
+    struct st_secp256r1_key_exhchange_t *ctx = (struct st_secp256r1_key_exhchange_t *)*_ctx;
+    uint8_t *secbytes = NULL;
+    int ret;
+
+    *_ctx = NULL;
+
+    if (secret == NULL) {
+        ret = 0;
+        goto Exit;
+    }
+
+    if (peerkey.len != SECP256R1_PUBLIC_KEY_SIZE || peerkey.base[0] != TYPE_UNCOMPRESSED_PUBLIC_KEY) {
+        ret = PTLS_ALERT_DECRYPT_ERROR;
+        goto Exit;
+    }
+    if ((secbytes = (uint8_t *)malloc(SECP256R1_SHARED_SECRET_SIZE)) == NULL) {
+        ret = PTLS_ERROR_NO_MEMORY;
+        goto Exit;
+    }
+    if (!uECC_shared_secret(peerkey.base + 1, ctx->priv, secbytes, uECC_secp256r1())) {
+        ret = PTLS_ALERT_DECRYPT_ERROR;
+        goto Exit;
+    }
+    *secret = ptls_iovec_init(secbytes, SECP256R1_SHARED_SECRET_SIZE);
+    ret = 0;
+
+Exit:
+    if (ret != 0)
+        free(secbytes);
+    ptls_clear_memory(ctx->priv, sizeof(ctx->priv));
+    free(ctx);
+    return ret;
+}
+
+static int secp256r1_create_key_exchange(ptls_key_exchange_context_t **_ctx, ptls_iovec_t *pubkey)
+{
+    struct st_secp256r1_key_exhchange_t *ctx;
+
+    if ((ctx = (struct st_secp256r1_key_exhchange_t *)malloc(sizeof(*ctx))) == NULL)
+        return PTLS_ERROR_NO_MEMORY;
+    ctx->super = (ptls_key_exchange_context_t){secp256r1_on_exchange};
+    ctx->pub[0] = TYPE_UNCOMPRESSED_PUBLIC_KEY;
+    uECC_make_key(ctx->pub + 1, ctx->priv, uECC_secp256r1());
+
+    *_ctx = &ctx->super;
+    *pubkey = ptls_iovec_init(ctx->pub, sizeof(ctx->pub));
+    return 0;
+}
+
+static int secp256r1_key_exchange(ptls_iovec_t *pubkey, ptls_iovec_t *secret, ptls_iovec_t peerkey)
+{
+    uint8_t priv[SECP256R1_PRIVATE_KEY_SIZE], *pub = NULL, *secbytes = NULL;
+    int ret;
+
+    if (peerkey.len != SECP256R1_PUBLIC_KEY_SIZE || peerkey.base[0] != TYPE_UNCOMPRESSED_PUBLIC_KEY) {
+        ret = PTLS_ALERT_DECRYPT_ERROR;
+        goto Exit;
+    }
+    if ((pub = malloc(SECP256R1_PUBLIC_KEY_SIZE)) == NULL) {
+        ret = PTLS_ERROR_NO_MEMORY;
+        goto Exit;
+    }
+    if ((secbytes = malloc(SECP256R1_SHARED_SECRET_SIZE)) == NULL) {
+        ret = PTLS_ERROR_NO_MEMORY;
+        goto Exit;
+    }
+
+    pub[0] = TYPE_UNCOMPRESSED_PUBLIC_KEY;
+    uECC_make_key(pub + 1, priv, uECC_secp256r1());
+    if (!uECC_shared_secret(peerkey.base + 1, priv, secbytes, uECC_secp256r1())) {
+        ret = PTLS_ALERT_DECRYPT_ERROR;
+        goto Exit;
+    }
+    *pubkey = ptls_iovec_init(pub, SECP256R1_PUBLIC_KEY_SIZE);
+    *secret = ptls_iovec_init(secbytes, SECP256R1_SHARED_SECRET_SIZE);
+    ret = 0;
+
+Exit:
+    ptls_clear_memory(priv, sizeof(priv));
+    if (ret != 0) {
+        free(secbytes);
+        free(pub);
+    }
+    return ret;
+}
+
+static int secp256r1sha256_sign(ptls_sign_certificate_t *_self, ptls_t *tls, uint16_t *selected_algorithm, ptls_buffer_t *outbuf,
+                                ptls_iovec_t input, const uint16_t *algorithms, size_t num_algorithms)
+{
+    ptls_minicrypto_secp256r1sha256_sign_certificate_t *self = (ptls_minicrypto_secp256r1sha256_sign_certificate_t *)_self;
+    uint8_t hash[32], sig[64];
+    size_t i;
+    int ret;
+
+    /* check algorithm */
+    for (i = 0; i != num_algorithms; ++i)
+        if (algorithms[i] == PTLS_SIGNATURE_ECDSA_SECP256R1_SHA256)
+            break;
+    if (i == num_algorithms)
+        return PTLS_ALERT_HANDSHAKE_FAILURE;
+
+    { /* calc hash */
+        cf_sha256_context ctx;
+        cf_sha256_init(&ctx);
+        cf_sha256_update(&ctx, input.base, input.len);
+        cf_sha256_digest_final(&ctx, hash);
+        ptls_clear_memory(&ctx, sizeof(ctx));
+    }
+
+    /* sign */
+    uECC_sign(self->key, hash, sizeof(hash), sig, uECC_secp256r1());
+
+    /* encode using DER */
+    ptls_buffer_push_asn1_sequence(outbuf, {
+        if ((ret = ptls_buffer_push_asn1_ubigint(outbuf, sig, 32)) != 0)
+            goto Exit;
+        if ((ret = ptls_buffer_push_asn1_ubigint(outbuf, sig + 32, 32)) != 0)
+            goto Exit;
+    });
+
+    *selected_algorithm = PTLS_SIGNATURE_ECDSA_SECP256R1_SHA256;
+    ret = 0;
+
+Exit:
+    ptls_clear_memory(hash, sizeof(hash));
+    ptls_clear_memory(sig, sizeof(sig));
+    return ret;
+}
+
+int ptls_minicrypto_init_secp256r1sha256_sign_certificate(ptls_minicrypto_secp256r1sha256_sign_certificate_t *self,
+                                                          ptls_iovec_t key)
+{
+    if (key.len != sizeof(self->key))
+        return PTLS_ERROR_INCOMPATIBLE_KEY;
+
+    self->super.cb = secp256r1sha256_sign;
+    memcpy(self->key, key.base, sizeof(self->key));
+
+    return 0;
+}
+
+ptls_key_exchange_algorithm_t ptls_minicrypto_secp256r1 = {PTLS_GROUP_SECP256R1, secp256r1_create_key_exchange,
+                                                           secp256r1_key_exchange};
+ptls_key_exchange_algorithm_t *ptls_minicrypto_key_exchanges[] = {&ptls_minicrypto_secp256r1, NULL};