diff options
Diffstat (limited to '')
| -rw-r--r-- | web/server/h2o/libh2o/deps/picotls/lib/openssl.c | 1066 |
1 files changed, 1066 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/picotls/lib/openssl.c b/web/server/h2o/libh2o/deps/picotls/lib/openssl.c new file mode 100644 index 00000000..2c9ee700 --- /dev/null +++ b/web/server/h2o/libh2o/deps/picotls/lib/openssl.c @@ -0,0 +1,1066 @@ +/* + * 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. + */ + +#ifdef _WINDOWS +#include "wincompat.h" +#else +#include <unistd.h> +#endif +#include <assert.h> +#include <stdlib.h> +#include <string.h> +#include <openssl/bn.h> +#include <openssl/crypto.h> +#include <openssl/ec.h> +#include <openssl/ecdh.h> +#include <openssl/err.h> +#include <openssl/evp.h> +#include <openssl/objects.h> +#include <openssl/rand.h> +#include <openssl/x509.h> +#include <openssl/x509v3.h> +#include <openssl/x509_vfy.h> +#include "picotls.h" +#include "picotls/openssl.h" + +#if !defined(LIBRESSL_VERSION_NUMBER) && OPENSSL_VERSION_NUMBER >= 0x10100000L +#define OPENSSL_1_1_API 1 +#elif defined(LIBRESSL_VERSION_NUMBER) && LIBRESSL_VERSION_NUMBER >= 0x2070000fL +#define OPENSSL_1_1_API 1 +#else +#define OPENSSL_1_1_API 0 +#endif + +#if !OPENSSL_1_1_API + +#define EVP_PKEY_up_ref(p) CRYPTO_add(&(p)->references, 1, CRYPTO_LOCK_EVP_PKEY) +#define X509_STORE_up_ref(p) CRYPTO_add(&(p)->references, 1, CRYPTO_LOCK_X509_STORE) + +static HMAC_CTX *HMAC_CTX_new(void) +{ + HMAC_CTX *ctx; + + if ((ctx = OPENSSL_malloc(sizeof(*ctx))) == NULL) + return NULL; + HMAC_CTX_init(ctx); + return ctx; +} + +static void HMAC_CTX_free(HMAC_CTX *ctx) +{ + HMAC_CTX_cleanup(ctx); + OPENSSL_free(ctx); +} + +#endif + +void ptls_openssl_random_bytes(void *buf, size_t len) +{ + RAND_bytes(buf, (int)len); +} + +static EC_KEY *ecdh_gerenate_key(EC_GROUP *group) +{ + EC_KEY *key; + + if ((key = EC_KEY_new()) == NULL) + return NULL; + if (!EC_KEY_set_group(key, group) || !EC_KEY_generate_key(key)) { + EC_KEY_free(key); + return NULL; + } + + return key; +} + +static int ecdh_calc_secret(ptls_iovec_t *out, EC_GROUP *group, EC_KEY *privkey, EC_POINT *peer_point) +{ + ptls_iovec_t secret; + int ret; + + secret.len = (EC_GROUP_get_degree(group) + 7) / 8; + if ((secret.base = malloc(secret.len)) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if (ECDH_compute_key(secret.base, secret.len, peer_point, privkey, NULL) <= 0) { + ret = PTLS_ALERT_HANDSHAKE_FAILURE; /* ??? */ + goto Exit; + } + ret = 0; + +Exit: + if (ret == 0) { + *out = secret; + } else { + free(secret.base); + *out = (ptls_iovec_t){NULL}; + } + return ret; +} + +static EC_POINT *x9_62_decode_point(EC_GROUP *group, ptls_iovec_t vec, BN_CTX *bn_ctx) +{ + EC_POINT *point = NULL; + + if ((point = EC_POINT_new(group)) == NULL) + return NULL; + if (!EC_POINT_oct2point(group, point, vec.base, vec.len, bn_ctx)) { + EC_POINT_free(point); + return NULL; + } + + return point; +} + +static ptls_iovec_t x9_62_encode_point(EC_GROUP *group, const EC_POINT *point, BN_CTX *bn_ctx) +{ + ptls_iovec_t vec; + + if ((vec.len = EC_POINT_point2oct(group, point, POINT_CONVERSION_UNCOMPRESSED, NULL, 0, bn_ctx)) == 0) + return (ptls_iovec_t){NULL}; + if ((vec.base = malloc(vec.len)) == NULL) + return (ptls_iovec_t){NULL}; + if (EC_POINT_point2oct(group, point, POINT_CONVERSION_UNCOMPRESSED, vec.base, vec.len, bn_ctx) != vec.len) { + free(vec.base); + return (ptls_iovec_t){NULL}; + } + + return vec; +} + +struct st_x9_62_keyex_context_t { + ptls_key_exchange_context_t super; + BN_CTX *bn_ctx; + EC_GROUP *group; + EC_KEY *privkey; + ptls_iovec_t pubkey; +}; + +static void x9_62_free_context(struct st_x9_62_keyex_context_t *ctx) +{ + free(ctx->pubkey.base); + if (ctx->privkey != NULL) + EC_KEY_free(ctx->privkey); + if (ctx->group != NULL) + EC_GROUP_free(ctx->group); + if (ctx->bn_ctx != NULL) + BN_CTX_free(ctx->bn_ctx); + free(ctx); +} + +static int x9_62_on_exchange(ptls_key_exchange_context_t **_ctx, ptls_iovec_t *secret, ptls_iovec_t peerkey) +{ + struct st_x9_62_keyex_context_t *ctx = (struct st_x9_62_keyex_context_t *)*_ctx; + EC_POINT *peer_point = NULL; + int ret; + + *_ctx = NULL; + + if ((peer_point = x9_62_decode_point(ctx->group, peerkey, ctx->bn_ctx)) == NULL) { + ret = PTLS_ALERT_DECODE_ERROR; + goto Exit; + } + if ((ret = ecdh_calc_secret(secret, ctx->group, ctx->privkey, peer_point)) != 0) + goto Exit; + +Exit: + if (peer_point != NULL) + EC_POINT_free(peer_point); + x9_62_free_context(ctx); + return ret; +} + +static int x9_62_create_key_exchange(ptls_key_exchange_context_t **_ctx, ptls_iovec_t *pubkey, int nid) +{ + struct st_x9_62_keyex_context_t *ctx = NULL; + int ret; + + if ((ctx = (struct st_x9_62_keyex_context_t *)malloc(sizeof(*ctx))) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + *ctx = (struct st_x9_62_keyex_context_t){{x9_62_on_exchange}}; + + if ((ctx->bn_ctx = BN_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if ((ctx->group = EC_GROUP_new_by_curve_name(nid)) == NULL) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if ((ctx->privkey = ecdh_gerenate_key(ctx->group)) == NULL) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + + if ((ctx->pubkey = x9_62_encode_point(ctx->group, EC_KEY_get0_public_key(ctx->privkey), ctx->bn_ctx)).base == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + *pubkey = ctx->pubkey; + ret = 0; + +Exit: + if (ret == 0) { + *_ctx = &ctx->super; + } else { + if (ctx != NULL) + x9_62_free_context(ctx); + *_ctx = NULL; + *pubkey = (ptls_iovec_t){NULL}; + } + + return ret; +} + +static int secp256r1_create_key_exchange(ptls_key_exchange_context_t **ctx, ptls_iovec_t *pubkey) +{ + return x9_62_create_key_exchange(ctx, pubkey, NID_X9_62_prime256v1); +} + +static int x9_62_key_exchange(EC_GROUP *group, ptls_iovec_t *pubkey, ptls_iovec_t *secret, ptls_iovec_t peerkey, BN_CTX *bn_ctx) +{ + EC_POINT *peer_point = NULL; + EC_KEY *privkey = NULL; + int ret; + + *pubkey = (ptls_iovec_t){NULL}; + *secret = (ptls_iovec_t){NULL}; + + /* decode peer key */ + if ((peer_point = x9_62_decode_point(group, peerkey, bn_ctx)) == NULL) { + ret = PTLS_ALERT_DECODE_ERROR; + goto Exit; + } + + /* create private key */ + if ((privkey = ecdh_gerenate_key(group)) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + /* encode public key */ + if ((*pubkey = x9_62_encode_point(group, EC_KEY_get0_public_key(privkey), bn_ctx)).base == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + /* calc secret */ + secret->len = (EC_GROUP_get_degree(group) + 7) / 8; + if ((secret->base = malloc(secret->len)) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + /* ecdh! */ + if (ECDH_compute_key(secret->base, secret->len, peer_point, privkey, NULL) <= 0) { + ret = PTLS_ALERT_HANDSHAKE_FAILURE; /* ??? */ + goto Exit; + } + + ret = 0; + +Exit: + if (peer_point != NULL) + EC_POINT_free(peer_point); + if (privkey != NULL) + EC_KEY_free(privkey); + if (ret != 0) { + free(pubkey->base); + *pubkey = (ptls_iovec_t){NULL}; + free(secret->base); + *secret = (ptls_iovec_t){NULL}; + } + return ret; +} + +static int secp_key_exchange(int nid, ptls_iovec_t *pubkey, ptls_iovec_t *secret, ptls_iovec_t peerkey) +{ + EC_GROUP *group = NULL; + BN_CTX *bn_ctx = NULL; + int ret; + + if ((group = EC_GROUP_new_by_curve_name(nid)) == NULL) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if ((bn_ctx = BN_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + ret = x9_62_key_exchange(group, pubkey, secret, peerkey, bn_ctx); + +Exit: + if (bn_ctx != NULL) + BN_CTX_free(bn_ctx); + if (group != NULL) + EC_GROUP_free(group); + return ret; +} + +static int secp256r1_key_exchange(ptls_iovec_t *pubkey, ptls_iovec_t *secret, ptls_iovec_t peerkey) +{ + return secp_key_exchange(NID_X9_62_prime256v1, pubkey, secret, peerkey); +} + +static int do_sign(EVP_PKEY *key, ptls_buffer_t *outbuf, ptls_iovec_t input, const EVP_MD *md) +{ + EVP_MD_CTX *ctx = NULL; + EVP_PKEY_CTX *pkey_ctx; + size_t siglen; + int ret; + + if ((ctx = EVP_MD_CTX_create()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if (EVP_DigestSignInit(ctx, &pkey_ctx, md, NULL, key) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_PKEY_id(key) == EVP_PKEY_RSA) { + if (EVP_PKEY_CTX_set_rsa_padding(pkey_ctx, RSA_PKCS1_PSS_PADDING) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkey_ctx, -1) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkey_ctx, EVP_sha256()) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + } + if (EVP_DigestSignUpdate(ctx, input.base, input.len) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_DigestSignFinal(ctx, NULL, &siglen) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if ((ret = ptls_buffer_reserve(outbuf, siglen)) != 0) + goto Exit; + if (EVP_DigestSignFinal(ctx, outbuf->base + outbuf->off, &siglen) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + outbuf->off += siglen; + + ret = 0; +Exit: + if (ctx != NULL) + EVP_MD_CTX_destroy(ctx); + return ret; +} + +struct cipher_context_t { + ptls_cipher_context_t super; + EVP_CIPHER_CTX *evp; +}; + +static void cipher_dispose(ptls_cipher_context_t *_ctx) +{ + struct cipher_context_t *ctx = (struct cipher_context_t *)_ctx; + EVP_CIPHER_CTX_free(ctx->evp); +} + +static void cipher_do_init(ptls_cipher_context_t *_ctx, const void *iv) +{ + struct cipher_context_t *ctx = (struct cipher_context_t *)_ctx; + int ret; + ret = EVP_EncryptInit_ex(ctx->evp, NULL, NULL, NULL, iv); + assert(ret); +} + +static int cipher_setup_crypto(ptls_cipher_context_t *_ctx, const void *key, const EVP_CIPHER *cipher, + void (*do_transform)(ptls_cipher_context_t *, void *, const void *, size_t)) +{ + struct cipher_context_t *ctx = (struct cipher_context_t *)_ctx; + + ctx->super.do_dispose = cipher_dispose; + ctx->super.do_init = cipher_do_init; + ctx->super.do_transform = do_transform; + + if ((ctx->evp = EVP_CIPHER_CTX_new()) == NULL) + return PTLS_ERROR_NO_MEMORY; + if (!EVP_EncryptInit_ex(ctx->evp, cipher, NULL, key, NULL)) { + EVP_CIPHER_CTX_free(ctx->evp); + return PTLS_ERROR_LIBRARY; + } + + return 0; +} + +static void cipher_encrypt(ptls_cipher_context_t *_ctx, void *output, const void *input, size_t _len) +{ + struct cipher_context_t *ctx = (struct cipher_context_t *)_ctx; + int len = (int)_len, ret = EVP_EncryptUpdate(ctx->evp, output, &len, input, len); + assert(ret); +} + +static int aes128ctr_setup_crypto(ptls_cipher_context_t *ctx, int is_enc, const void *key) +{ + return cipher_setup_crypto(ctx, key, EVP_aes_128_ctr(), cipher_encrypt); +} + +static int aes256ctr_setup_crypto(ptls_cipher_context_t *ctx, int is_enc, const void *key) +{ + return cipher_setup_crypto(ctx, key, EVP_aes_256_ctr(), cipher_encrypt); +} + +#if defined(PTLS_OPENSSL_HAVE_CHACHA20_POLY1305) + +static int chacha20_setup_crypto(ptls_cipher_context_t *ctx, int is_enc, const void *key) +{ + return cipher_setup_crypto(ctx, key, EVP_chacha20(), cipher_encrypt); +} + +#endif + +struct aead_crypto_context_t { + ptls_aead_context_t super; + EVP_CIPHER_CTX *evp_ctx; +}; + +static void aead_dispose_crypto(ptls_aead_context_t *_ctx) +{ + struct aead_crypto_context_t *ctx = (struct aead_crypto_context_t *)_ctx; + + if (ctx->evp_ctx != NULL) + EVP_CIPHER_CTX_free(ctx->evp_ctx); +} + +static void aead_do_encrypt_init(ptls_aead_context_t *_ctx, const void *iv, const void *aad, size_t aadlen) +{ + struct aead_crypto_context_t *ctx = (struct aead_crypto_context_t *)_ctx; + int ret; + + /* FIXME for performance, preserve the expanded key instead of the raw key */ + ret = EVP_EncryptInit_ex(ctx->evp_ctx, NULL, NULL, NULL, iv); + assert(ret); + + if (aadlen != 0) { + int blocklen; + ret = EVP_EncryptUpdate(ctx->evp_ctx, NULL, &blocklen, aad, (int)aadlen); + assert(ret); + } +} + +static size_t aead_do_encrypt_update(ptls_aead_context_t *_ctx, void *output, const void *input, size_t inlen) +{ + struct aead_crypto_context_t *ctx = (struct aead_crypto_context_t *)_ctx; + int blocklen, ret; + + ret = EVP_EncryptUpdate(ctx->evp_ctx, output, &blocklen, input, (int)inlen); + assert(ret); + + return blocklen; +} + +static size_t aead_do_encrypt_final(ptls_aead_context_t *_ctx, void *_output) +{ + struct aead_crypto_context_t *ctx = (struct aead_crypto_context_t *)_ctx; + uint8_t *output = _output; + size_t off = 0, tag_size = ctx->super.algo->tag_size; + int blocklen, ret; + + ret = EVP_EncryptFinal_ex(ctx->evp_ctx, output + off, &blocklen); + assert(ret); + off += blocklen; + ret = EVP_CIPHER_CTX_ctrl(ctx->evp_ctx, EVP_CTRL_GCM_GET_TAG, (int)tag_size, output + off); + assert(ret); + off += tag_size; + + return off; +} + +static size_t aead_do_decrypt(ptls_aead_context_t *_ctx, void *_output, const void *input, size_t inlen, const void *iv, + const void *aad, size_t aadlen) +{ + struct aead_crypto_context_t *ctx = (struct aead_crypto_context_t *)_ctx; + uint8_t *output = _output; + size_t off = 0, tag_size = ctx->super.algo->tag_size; + int blocklen, ret; + + if (inlen < tag_size) + return SIZE_MAX; + + ret = EVP_DecryptInit_ex(ctx->evp_ctx, NULL, NULL, NULL, iv); + assert(ret); + if (aadlen != 0) { + ret = EVP_DecryptUpdate(ctx->evp_ctx, NULL, &blocklen, aad, (int)aadlen); + assert(ret); + } + ret = EVP_DecryptUpdate(ctx->evp_ctx, output + off, &blocklen, input, (int)(inlen - tag_size)); + assert(ret); + off += blocklen; + if (!EVP_CIPHER_CTX_ctrl(ctx->evp_ctx, EVP_CTRL_GCM_SET_TAG, (int)tag_size, (void *)((uint8_t *)input + inlen - tag_size))) + return SIZE_MAX; + if (!EVP_DecryptFinal_ex(ctx->evp_ctx, output + off, &blocklen)) + return SIZE_MAX; + off += blocklen; + + return off; +} + +static int aead_setup_crypto(ptls_aead_context_t *_ctx, int is_enc, const void *key, const EVP_CIPHER *cipher) +{ + struct aead_crypto_context_t *ctx = (struct aead_crypto_context_t *)_ctx; + int ret; + + ctx->super.dispose_crypto = aead_dispose_crypto; + if (is_enc) { + ctx->super.do_encrypt_init = aead_do_encrypt_init; + ctx->super.do_encrypt_update = aead_do_encrypt_update; + ctx->super.do_encrypt_final = aead_do_encrypt_final; + ctx->super.do_decrypt = NULL; + } else { + ctx->super.do_encrypt_init = NULL; + ctx->super.do_encrypt_update = NULL; + ctx->super.do_encrypt_final = NULL; + ctx->super.do_decrypt = aead_do_decrypt; + } + ctx->evp_ctx = NULL; + + if ((ctx->evp_ctx = EVP_CIPHER_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Error; + } + if (is_enc) { + if (!EVP_EncryptInit_ex(ctx->evp_ctx, cipher, NULL, key, NULL)) { + ret = PTLS_ERROR_LIBRARY; + goto Error; + } + } else { + if (!EVP_DecryptInit_ex(ctx->evp_ctx, cipher, NULL, key, NULL)) { + ret = PTLS_ERROR_LIBRARY; + goto Error; + } + } + if (!EVP_CIPHER_CTX_ctrl(ctx->evp_ctx, EVP_CTRL_GCM_SET_IVLEN, (int)ctx->super.algo->iv_size, NULL)) { + ret = PTLS_ERROR_LIBRARY; + goto Error; + } + + return 0; + +Error: + aead_dispose_crypto(&ctx->super); + return ret; +} + +static int aead_aes128gcm_setup_crypto(ptls_aead_context_t *ctx, int is_enc, const void *key) +{ + return aead_setup_crypto(ctx, is_enc, key, EVP_aes_128_gcm()); +} + +static int aead_aes256gcm_setup_crypto(ptls_aead_context_t *ctx, int is_enc, const void *key) +{ + return aead_setup_crypto(ctx, is_enc, key, EVP_aes_256_gcm()); +} + +#if defined(PTLS_OPENSSL_HAVE_CHACHA20_POLY1305) +static int aead_chacha20poly1305_setup_crypto(ptls_aead_context_t *ctx, int is_enc, const void *key) +{ + return aead_setup_crypto(ctx, is_enc, key, EVP_chacha20_poly1305()); +} +#endif + +#define _sha256_final(ctx, md) SHA256_Final((md), (ctx)) +ptls_define_hash(sha256, SHA256_CTX, SHA256_Init, SHA256_Update, _sha256_final); + +#define _sha384_final(ctx, md) SHA384_Final((md), (ctx)) +ptls_define_hash(sha384, SHA512_CTX, SHA384_Init, SHA384_Update, _sha384_final); + +static int sign_certificate(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_openssl_sign_certificate_t *self = (ptls_openssl_sign_certificate_t *)_self; + const struct st_ptls_openssl_signature_scheme_t *scheme; + + /* select the algorithm */ + for (scheme = self->schemes; scheme->scheme_id != UINT16_MAX; ++scheme) { + size_t i; + for (i = 0; i != num_algorithms; ++i) + if (algorithms[i] == scheme->scheme_id) + goto Found; + } + return PTLS_ALERT_HANDSHAKE_FAILURE; + +Found: + *selected_algorithm = scheme->scheme_id; + return do_sign(self->key, outbuf, input, scheme->scheme_md); +} + +static X509 *to_x509(ptls_iovec_t vec) +{ + const uint8_t *p = vec.base; + return d2i_X509(NULL, &p, vec.len); +} + +static int verify_sign(void *verify_ctx, ptls_iovec_t data, ptls_iovec_t signature) +{ + EVP_PKEY *key = verify_ctx; + EVP_MD_CTX *ctx = NULL; + EVP_PKEY_CTX *pkey_ctx = NULL; + int ret = 0; + + if (data.base == NULL) + goto Exit; + + if ((ctx = EVP_MD_CTX_create()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if (EVP_DigestVerifyInit(ctx, &pkey_ctx, EVP_sha256(), NULL, key) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_PKEY_id(key) == EVP_PKEY_RSA) { + if (EVP_PKEY_CTX_set_rsa_padding(pkey_ctx, RSA_PKCS1_PSS_PADDING) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_PKEY_CTX_set_rsa_pss_saltlen(pkey_ctx, -1) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_PKEY_CTX_set_rsa_mgf1_md(pkey_ctx, EVP_sha256()) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + } + if (EVP_DigestVerifyUpdate(ctx, data.base, data.len) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (EVP_DigestVerifyFinal(ctx, signature.base, signature.len) != 1) { + ret = PTLS_ALERT_DECRYPT_ERROR; + goto Exit; + } + ret = 0; + +Exit: + if (ctx != NULL) + EVP_MD_CTX_destroy(ctx); + EVP_PKEY_free(key); + return ret; +} + +int ptls_openssl_init_sign_certificate(ptls_openssl_sign_certificate_t *self, EVP_PKEY *key) +{ + *self = (ptls_openssl_sign_certificate_t){{sign_certificate}}; + size_t scheme_index = 0; + +#define PUSH_SCHEME(id, md) \ + self->schemes[scheme_index++] = (struct st_ptls_openssl_signature_scheme_t) \ + { \ + id, md \ + } + + switch (EVP_PKEY_id(key)) { + case EVP_PKEY_RSA: + PUSH_SCHEME(PTLS_SIGNATURE_RSA_PSS_RSAE_SHA256, EVP_sha256()); + PUSH_SCHEME(PTLS_SIGNATURE_RSA_PSS_RSAE_SHA384, EVP_sha384()); + PUSH_SCHEME(PTLS_SIGNATURE_RSA_PSS_RSAE_SHA512, EVP_sha512()); + break; + case EVP_PKEY_EC: { + EC_KEY *eckey = EVP_PKEY_get1_EC_KEY(key); + switch (EC_GROUP_get_curve_name(EC_KEY_get0_group(eckey))) { + case NID_X9_62_prime256v1: + PUSH_SCHEME(PTLS_SIGNATURE_ECDSA_SECP256R1_SHA256, EVP_sha256()); + break; +#if defined(NID_secp384r1) && !OPENSSL_NO_SHA384 + case NID_secp384r1: + PUSH_SCHEME(PTLS_SIGNATURE_ECDSA_SECP384R1_SHA384, EVP_sha384()); + break; +#endif +#if defined(NID_secp384r1) && !OPENSSL_NO_SHA512 + case NID_secp521r1: + PUSH_SCHEME(PTLS_SIGNATURE_ECDSA_SECP521R1_SHA512, EVP_sha512()); + break; +#endif + default: + EC_KEY_free(eckey); + return PTLS_ERROR_INCOMPATIBLE_KEY; + } + EC_KEY_free(eckey); + } break; + default: + return PTLS_ERROR_INCOMPATIBLE_KEY; + } + PUSH_SCHEME(UINT16_MAX, NULL); + assert(scheme_index <= sizeof(self->schemes) / sizeof(self->schemes[0])); + +#undef PUSH_SCHEME + + EVP_PKEY_up_ref(key); + self->key = key; + + return 0; +} + +void ptls_openssl_dispose_sign_certificate(ptls_openssl_sign_certificate_t *self) +{ + EVP_PKEY_free(self->key); +} + +static int serialize_cert(X509 *cert, ptls_iovec_t *dst) +{ + int len = i2d_X509(cert, NULL); + assert(len > 0); + + if ((dst->base = malloc(len)) == NULL) + return PTLS_ERROR_NO_MEMORY; + unsigned char *p = dst->base; + dst->len = i2d_X509(cert, &p); + assert(len == dst->len); + + return 0; +} + +int ptls_openssl_load_certificates(ptls_context_t *ctx, X509 *cert, STACK_OF(X509) * chain) +{ + ptls_iovec_t *list = NULL; + size_t slot = 0, count = (cert != NULL) + (chain != NULL ? sk_X509_num(chain) : 0); + int ret; + + assert(ctx->certificates.list == NULL); + + if ((list = malloc(sizeof(*list) * count)) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if (cert != NULL) { + if ((ret = serialize_cert(cert, list + slot++)) != 0) + goto Exit; + } + if (chain != NULL) { + int i; + for (i = 0; i != sk_X509_num(chain); ++i) { + if ((ret = serialize_cert(sk_X509_value(chain, i), list + slot++)) != 0) + goto Exit; + } + } + + assert(slot == count); + + ctx->certificates.list = list; + ctx->certificates.count = count; + ret = 0; + +Exit: + if (ret != 0 && list != NULL) { + size_t i; + for (i = 0; i != slot; ++i) + free(list[i].base); + free(list); + } + return ret; +} + +static int verify_certificate(ptls_verify_certificate_t *_self, ptls_t *tls, int (**verifier)(void *, ptls_iovec_t, ptls_iovec_t), + void **verify_data, ptls_iovec_t *certs, size_t num_certs) +{ + ptls_openssl_verify_certificate_t *self = (ptls_openssl_verify_certificate_t *)_self; + X509 *cert = NULL; + STACK_OF(X509) *chain = NULL; + X509_STORE_CTX *verify_ctx = NULL; + int ret = 0; + + assert(num_certs != 0); + + if ((cert = to_x509(certs[0])) == NULL) { + ret = PTLS_ALERT_BAD_CERTIFICATE; + goto Exit; + } + + if (self->cert_store != NULL) { + size_t i; + for (i = 1; i != num_certs; ++i) { + X509 *interm = to_x509(certs[i]); + if (interm == NULL) { + ret = PTLS_ALERT_BAD_CERTIFICATE; + goto Exit; + } + } + if ((verify_ctx = X509_STORE_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if (X509_STORE_CTX_init(verify_ctx, self->cert_store, cert, chain) != 1) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + X509_STORE_CTX_set_purpose(verify_ctx, X509_PURPOSE_SSL_CLIENT); + if (X509_verify_cert(verify_ctx) == 1) { + ret = 0; + } else { + switch (X509_STORE_CTX_get_error(verify_ctx)) { + case X509_V_ERR_OUT_OF_MEM: + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + case X509_V_ERR_CERT_REVOKED: + ret = PTLS_ALERT_CERTIFICATE_REVOKED; + goto Exit; + case X509_V_ERR_CERT_HAS_EXPIRED: + ret = PTLS_ALERT_CERTIFICATE_EXPIRED; + goto Exit; + default: + ret = PTLS_ALERT_CERTIFICATE_UNKNOWN; + goto Exit; + } + } + } + + if ((*verify_data = X509_get_pubkey(cert)) == NULL) { + ret = PTLS_ALERT_BAD_CERTIFICATE; + goto Exit; + } + *verifier = verify_sign; + +Exit: + if (verify_ctx != NULL) + X509_STORE_CTX_free(verify_ctx); + if (chain != NULL) + sk_X509_free(chain); + if (cert != NULL) + X509_free(cert); + return ret; +} + +int ptls_openssl_init_verify_certificate(ptls_openssl_verify_certificate_t *self, X509_STORE *store) +{ + *self = (ptls_openssl_verify_certificate_t){{verify_certificate}}; + + if (store != NULL) { + if (store != PTLS_OPENSSL_DEFAULT_CERTIFICATE_STORE) { + X509_STORE_up_ref(store); + self->cert_store = store; + } else { + X509_LOOKUP *lookup; + if ((self->cert_store = X509_STORE_new()) == NULL) + return -1; + if ((lookup = X509_STORE_add_lookup(self->cert_store, X509_LOOKUP_file())) == NULL) + return -1; + X509_LOOKUP_load_file(lookup, NULL, X509_FILETYPE_DEFAULT); + if ((lookup = X509_STORE_add_lookup(self->cert_store, X509_LOOKUP_hash_dir())) == NULL) + return -1; + X509_LOOKUP_add_dir(lookup, NULL, X509_FILETYPE_DEFAULT); + } + } + + return 0; +} + +void ptls_openssl_dispose_verify_certificate(ptls_openssl_verify_certificate_t *self) +{ + X509_STORE_free(self->cert_store); + free(self); +} + +#define TICKET_LABEL_SIZE 16 +#define TICKET_IV_SIZE EVP_MAX_IV_LENGTH + +int ptls_openssl_encrypt_ticket(ptls_buffer_t *buf, ptls_iovec_t src, + int (*cb)(unsigned char *key_name, unsigned char *iv, EVP_CIPHER_CTX *ctx, HMAC_CTX *hctx, int enc)) +{ + EVP_CIPHER_CTX *cctx = NULL; + HMAC_CTX *hctx = NULL; + uint8_t *dst; + int clen, ret; + + if ((cctx = EVP_CIPHER_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if ((hctx = HMAC_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + if ((ret = ptls_buffer_reserve(buf, TICKET_LABEL_SIZE + TICKET_IV_SIZE + src.len + EVP_MAX_BLOCK_LENGTH + EVP_MAX_MD_SIZE)) != + 0) + goto Exit; + dst = buf->base + buf->off; + + /* fill label and iv, as well as obtaining the keys */ + if (!(*cb)(dst, dst + TICKET_LABEL_SIZE, cctx, hctx, 1)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + dst += TICKET_LABEL_SIZE + TICKET_IV_SIZE; + + /* encrypt */ + if (!EVP_EncryptUpdate(cctx, dst, &clen, src.base, (int)src.len)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + dst += clen; + if (!EVP_EncryptFinal_ex(cctx, dst, &clen)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + dst += clen; + + /* append hmac */ + if (!HMAC_Update(hctx, buf->base + buf->off, dst - (buf->base + buf->off)) || !HMAC_Final(hctx, dst, NULL)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + dst += HMAC_size(hctx); + + assert(dst <= buf->base + buf->capacity); + buf->off += dst - (buf->base + buf->off); + ret = 0; + +Exit: + if (cctx != NULL) + EVP_CIPHER_CTX_cleanup(cctx); + if (hctx != NULL) + HMAC_CTX_free(hctx); + return ret; +} + +int ptls_openssl_decrypt_ticket(ptls_buffer_t *buf, ptls_iovec_t src, + int (*cb)(unsigned char *key_name, unsigned char *iv, EVP_CIPHER_CTX *ctx, HMAC_CTX *hctx, int enc)) +{ + EVP_CIPHER_CTX *cctx = NULL; + HMAC_CTX *hctx = NULL; + int clen, ret; + + if ((cctx = EVP_CIPHER_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + if ((hctx = HMAC_CTX_new()) == NULL) { + ret = PTLS_ERROR_NO_MEMORY; + goto Exit; + } + + /* obtain cipher and hash context. + * Note: no need to handle renew, since in picotls we always send a new ticket to minimize the chance of ticket reuse */ + if (src.len < TICKET_LABEL_SIZE + TICKET_IV_SIZE) { + ret = PTLS_ALERT_DECODE_ERROR; + goto Exit; + } + if (!(*cb)(src.base, src.base + TICKET_LABEL_SIZE, cctx, hctx, 0)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + + /* check hmac, and exclude label, iv, hmac */ + size_t hmac_size = HMAC_size(hctx); + if (src.len < TICKET_LABEL_SIZE + TICKET_IV_SIZE + hmac_size) { + ret = PTLS_ALERT_DECODE_ERROR; + goto Exit; + } + src.len -= hmac_size; + uint8_t hmac[EVP_MAX_MD_SIZE]; + if (!HMAC_Update(hctx, src.base, src.len) || !HMAC_Final(hctx, hmac, NULL)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + if (memcmp(src.base + src.len, hmac, hmac_size) != 0) { + ret = PTLS_ALERT_HANDSHAKE_FAILURE; + goto Exit; + } + src.base += TICKET_LABEL_SIZE + TICKET_IV_SIZE; + src.len -= TICKET_LABEL_SIZE + TICKET_IV_SIZE; + + /* decrypt */ + if ((ret = ptls_buffer_reserve(buf, src.len)) != 0) + goto Exit; + if (!EVP_DecryptUpdate(cctx, buf->base + buf->off, &clen, src.base, (int)src.len)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + buf->off += clen; + if (!EVP_DecryptFinal_ex(cctx, buf->base + buf->off, &clen)) { + ret = PTLS_ERROR_LIBRARY; + goto Exit; + } + buf->off += clen; + + ret = 0; + +Exit: + if (cctx != NULL) + EVP_CIPHER_CTX_cleanup(cctx); + if (hctx != NULL) + HMAC_CTX_free(hctx); + return ret; +} + +ptls_key_exchange_algorithm_t ptls_openssl_secp256r1 = {PTLS_GROUP_SECP256R1, secp256r1_create_key_exchange, + secp256r1_key_exchange}; +ptls_key_exchange_algorithm_t *ptls_openssl_key_exchanges[] = {&ptls_openssl_secp256r1, NULL}; +ptls_cipher_algorithm_t ptls_openssl_aes128ctr = {"AES128-CTR", PTLS_AES128_KEY_SIZE, PTLS_AES_IV_SIZE, + sizeof(struct cipher_context_t), aes128ctr_setup_crypto}; +ptls_aead_algorithm_t ptls_openssl_aes128gcm = {"AES128-GCM", + &ptls_openssl_aes128ctr, + PTLS_AES128_KEY_SIZE, + PTLS_AESGCM_IV_SIZE, + PTLS_AESGCM_TAG_SIZE, + sizeof(struct aead_crypto_context_t), + aead_aes128gcm_setup_crypto}; +ptls_cipher_algorithm_t ptls_openssl_aes256ctr = {"AES256-CTR", PTLS_AES256_KEY_SIZE, PTLS_AES_IV_SIZE, + sizeof(struct cipher_context_t), aes256ctr_setup_crypto}; +ptls_aead_algorithm_t ptls_openssl_aes256gcm = {"AES256-GCM", + &ptls_openssl_aes256ctr, + PTLS_AES256_KEY_SIZE, + PTLS_AESGCM_IV_SIZE, + PTLS_AESGCM_TAG_SIZE, + sizeof(struct aead_crypto_context_t), + aead_aes256gcm_setup_crypto}; +ptls_hash_algorithm_t ptls_openssl_sha256 = {PTLS_SHA256_BLOCK_SIZE, PTLS_SHA256_DIGEST_SIZE, sha256_create, + PTLS_ZERO_DIGEST_SHA256}; +ptls_hash_algorithm_t ptls_openssl_sha384 = {PTLS_SHA384_BLOCK_SIZE, PTLS_SHA384_DIGEST_SIZE, sha384_create, + PTLS_ZERO_DIGEST_SHA384}; +ptls_cipher_suite_t ptls_openssl_aes128gcmsha256 = {PTLS_CIPHER_SUITE_AES_128_GCM_SHA256, &ptls_openssl_aes128gcm, + &ptls_openssl_sha256}; +ptls_cipher_suite_t ptls_openssl_aes256gcmsha384 = {PTLS_CIPHER_SUITE_AES_256_GCM_SHA384, &ptls_openssl_aes256gcm, + &ptls_openssl_sha384}; +#if defined(PTLS_OPENSSL_HAVE_CHACHA20_POLY1305) +ptls_cipher_algorithm_t ptls_openssl_chacha20 = {"CHACHA20", PTLS_CHACHA20_KEY_SIZE, PTLS_CHACHA20_IV_SIZE, + sizeof(struct cipher_context_t), chacha20_setup_crypto}; +ptls_aead_algorithm_t ptls_openssl_chacha20poly1305 = {"CHACHA20-POLY1305", + &ptls_openssl_chacha20, + PTLS_CHACHA20_KEY_SIZE, + PTLS_CHACHA20POLY1305_IV_SIZE, + PTLS_CHACHA20POLY1305_TAG_SIZE, + sizeof(struct aead_crypto_context_t), + aead_chacha20poly1305_setup_crypto}; +ptls_cipher_suite_t ptls_openssl_chacha20poly1305sha256 = {PTLS_CIPHER_SUITE_CHACHA20_POLY1305_SHA256, + &ptls_openssl_chacha20poly1305, &ptls_openssl_sha256}; +#endif +ptls_cipher_suite_t *ptls_openssl_cipher_suites[] = {&ptls_openssl_aes256gcmsha384, &ptls_openssl_aes128gcmsha256, +#if defined(PTLS_OPENSSL_HAVE_CHACHA20_POLY1305) + &ptls_openssl_chacha20poly1305sha256, +#endif + NULL}; |