diff options
Diffstat (limited to '')
| -rw-r--r-- | crypto/openssl/openssl.c | 807 |
1 files changed, 807 insertions, 0 deletions
diff --git a/crypto/openssl/openssl.c b/crypto/openssl/openssl.c new file mode 100644 index 0000000..466d9e1 --- /dev/null +++ b/crypto/openssl/openssl.c @@ -0,0 +1,807 @@ +/* + * ngtcp2 + * + * Copyright (c) 2019 ngtcp2 contributors + * + * 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 HAVE_CONFIG_H +# include <config.h> +#endif /* HAVE_CONFIG_H */ + +#include <assert.h> + +#include <ngtcp2/ngtcp2_crypto.h> +#include <ngtcp2/ngtcp2_crypto_openssl.h> + +#include <openssl/ssl.h> +#include <openssl/evp.h> +#include <openssl/kdf.h> +#include <openssl/rand.h> + +#if OPENSSL_VERSION_NUMBER >= 0x30000000L +# include <openssl/core_names.h> +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + +#include "shared.h" + +static size_t crypto_aead_max_overhead(const EVP_CIPHER *aead) { + switch (EVP_CIPHER_nid(aead)) { + case NID_aes_128_gcm: + case NID_aes_256_gcm: + return EVP_GCM_TLS_TAG_LEN; + case NID_chacha20_poly1305: + return EVP_CHACHAPOLY_TLS_TAG_LEN; + case NID_aes_128_ccm: + return EVP_CCM_TLS_TAG_LEN; + default: + assert(0); + abort(); /* if NDEBUG is set */ + } +} + +ngtcp2_crypto_aead *ngtcp2_crypto_aead_aes_128_gcm(ngtcp2_crypto_aead *aead) { + return ngtcp2_crypto_aead_init(aead, (void *)EVP_aes_128_gcm()); +} + +ngtcp2_crypto_md *ngtcp2_crypto_md_sha256(ngtcp2_crypto_md *md) { + md->native_handle = (void *)EVP_sha256(); + return md; +} + +ngtcp2_crypto_ctx *ngtcp2_crypto_ctx_initial(ngtcp2_crypto_ctx *ctx) { + ngtcp2_crypto_aead_init(&ctx->aead, (void *)EVP_aes_128_gcm()); + ctx->md.native_handle = (void *)EVP_sha256(); + ctx->hp.native_handle = (void *)EVP_aes_128_ctr(); + ctx->max_encryption = 0; + ctx->max_decryption_failure = 0; + return ctx; +} + +ngtcp2_crypto_aead *ngtcp2_crypto_aead_init(ngtcp2_crypto_aead *aead, + void *aead_native_handle) { + aead->native_handle = aead_native_handle; + aead->max_overhead = crypto_aead_max_overhead(aead_native_handle); + return aead; +} + +ngtcp2_crypto_aead *ngtcp2_crypto_aead_retry(ngtcp2_crypto_aead *aead) { + return ngtcp2_crypto_aead_init(aead, (void *)EVP_aes_128_gcm()); +} + +static const EVP_CIPHER *crypto_ssl_get_aead(SSL *ssl) { + switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) { + case TLS1_3_CK_AES_128_GCM_SHA256: + return EVP_aes_128_gcm(); + case TLS1_3_CK_AES_256_GCM_SHA384: + return EVP_aes_256_gcm(); + case TLS1_3_CK_CHACHA20_POLY1305_SHA256: + return EVP_chacha20_poly1305(); + case TLS1_3_CK_AES_128_CCM_SHA256: + return EVP_aes_128_ccm(); + default: + return NULL; + } +} + +static uint64_t crypto_ssl_get_aead_max_encryption(SSL *ssl) { + switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) { + case TLS1_3_CK_AES_128_GCM_SHA256: + case TLS1_3_CK_AES_256_GCM_SHA384: + return NGTCP2_CRYPTO_MAX_ENCRYPTION_AES_GCM; + case TLS1_3_CK_CHACHA20_POLY1305_SHA256: + return NGTCP2_CRYPTO_MAX_ENCRYPTION_CHACHA20_POLY1305; + case TLS1_3_CK_AES_128_CCM_SHA256: + return NGTCP2_CRYPTO_MAX_ENCRYPTION_AES_CCM; + default: + return 0; + } +} + +static uint64_t crypto_ssl_get_aead_max_decryption_failure(SSL *ssl) { + switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) { + case TLS1_3_CK_AES_128_GCM_SHA256: + case TLS1_3_CK_AES_256_GCM_SHA384: + return NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_AES_GCM; + case TLS1_3_CK_CHACHA20_POLY1305_SHA256: + return NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_CHACHA20_POLY1305; + case TLS1_3_CK_AES_128_CCM_SHA256: + return NGTCP2_CRYPTO_MAX_DECRYPTION_FAILURE_AES_CCM; + default: + return 0; + } +} + +static const EVP_CIPHER *crypto_ssl_get_hp(SSL *ssl) { + switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) { + case TLS1_3_CK_AES_128_GCM_SHA256: + case TLS1_3_CK_AES_128_CCM_SHA256: + return EVP_aes_128_ctr(); + case TLS1_3_CK_AES_256_GCM_SHA384: + return EVP_aes_256_ctr(); + case TLS1_3_CK_CHACHA20_POLY1305_SHA256: + return EVP_chacha20(); + default: + return NULL; + } +} + +static const EVP_MD *crypto_ssl_get_md(SSL *ssl) { + switch (SSL_CIPHER_get_id(SSL_get_current_cipher(ssl))) { + case TLS1_3_CK_AES_128_GCM_SHA256: + case TLS1_3_CK_CHACHA20_POLY1305_SHA256: + case TLS1_3_CK_AES_128_CCM_SHA256: + return EVP_sha256(); + case TLS1_3_CK_AES_256_GCM_SHA384: + return EVP_sha384(); + default: + return NULL; + } +} + +ngtcp2_crypto_ctx *ngtcp2_crypto_ctx_tls(ngtcp2_crypto_ctx *ctx, + void *tls_native_handle) { + SSL *ssl = tls_native_handle; + ngtcp2_crypto_aead_init(&ctx->aead, (void *)crypto_ssl_get_aead(ssl)); + ctx->md.native_handle = (void *)crypto_ssl_get_md(ssl); + ctx->hp.native_handle = (void *)crypto_ssl_get_hp(ssl); + ctx->max_encryption = crypto_ssl_get_aead_max_encryption(ssl); + ctx->max_decryption_failure = crypto_ssl_get_aead_max_decryption_failure(ssl); + return ctx; +} + +ngtcp2_crypto_ctx *ngtcp2_crypto_ctx_tls_early(ngtcp2_crypto_ctx *ctx, + void *tls_native_handle) { + return ngtcp2_crypto_ctx_tls(ctx, tls_native_handle); +} + +static size_t crypto_md_hashlen(const EVP_MD *md) { + return (size_t)EVP_MD_size(md); +} + +size_t ngtcp2_crypto_md_hashlen(const ngtcp2_crypto_md *md) { + return crypto_md_hashlen(md->native_handle); +} + +static size_t crypto_aead_keylen(const EVP_CIPHER *aead) { + return (size_t)EVP_CIPHER_key_length(aead); +} + +size_t ngtcp2_crypto_aead_keylen(const ngtcp2_crypto_aead *aead) { + return crypto_aead_keylen(aead->native_handle); +} + +static size_t crypto_aead_noncelen(const EVP_CIPHER *aead) { + return (size_t)EVP_CIPHER_iv_length(aead); +} + +size_t ngtcp2_crypto_aead_noncelen(const ngtcp2_crypto_aead *aead) { + return crypto_aead_noncelen(aead->native_handle); +} + +int ngtcp2_crypto_aead_ctx_encrypt_init(ngtcp2_crypto_aead_ctx *aead_ctx, + const ngtcp2_crypto_aead *aead, + const uint8_t *key, size_t noncelen) { + const EVP_CIPHER *cipher = aead->native_handle; + int cipher_nid = EVP_CIPHER_nid(cipher); + EVP_CIPHER_CTX *actx; + size_t taglen = crypto_aead_max_overhead(cipher); +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + OSSL_PARAM params[3]; +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + actx = EVP_CIPHER_CTX_new(); + if (actx == NULL) { + return -1; + } + +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &noncelen); + + if (cipher_nid == NID_aes_128_ccm) { + params[1] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, + NULL, taglen); + params[2] = OSSL_PARAM_construct_end(); + } else { + params[1] = OSSL_PARAM_construct_end(); + } +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + if (!EVP_EncryptInit_ex(actx, cipher, NULL, NULL, NULL) || +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + !EVP_CIPHER_CTX_set_params(actx, params) || +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + !EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_IVLEN, (int)noncelen, + NULL) || + (cipher_nid == NID_aes_128_ccm && + !EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_TAG, (int)taglen, NULL)) || +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + !EVP_EncryptInit_ex(actx, NULL, NULL, key, NULL)) { + EVP_CIPHER_CTX_free(actx); + return -1; + } + + aead_ctx->native_handle = actx; + + return 0; +} + +int ngtcp2_crypto_aead_ctx_decrypt_init(ngtcp2_crypto_aead_ctx *aead_ctx, + const ngtcp2_crypto_aead *aead, + const uint8_t *key, size_t noncelen) { + const EVP_CIPHER *cipher = aead->native_handle; + int cipher_nid = EVP_CIPHER_nid(cipher); + EVP_CIPHER_CTX *actx; + size_t taglen = crypto_aead_max_overhead(cipher); +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + OSSL_PARAM params[3]; +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + actx = EVP_CIPHER_CTX_new(); + if (actx == NULL) { + return -1; + } + +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + params[0] = OSSL_PARAM_construct_size_t(OSSL_CIPHER_PARAM_IVLEN, &noncelen); + + if (cipher_nid == NID_aes_128_ccm) { + params[1] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, + NULL, taglen); + params[2] = OSSL_PARAM_construct_end(); + } else { + params[1] = OSSL_PARAM_construct_end(); + } +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + if (!EVP_DecryptInit_ex(actx, cipher, NULL, NULL, NULL) || +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + !EVP_CIPHER_CTX_set_params(actx, params) || +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + !EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_IVLEN, (int)noncelen, + NULL) || + (cipher_nid == NID_aes_128_ccm && + !EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_TAG, (int)taglen, NULL)) || +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + !EVP_DecryptInit_ex(actx, NULL, NULL, key, NULL)) { + EVP_CIPHER_CTX_free(actx); + return -1; + } + + aead_ctx->native_handle = actx; + + return 0; +} + +void ngtcp2_crypto_aead_ctx_free(ngtcp2_crypto_aead_ctx *aead_ctx) { + if (aead_ctx->native_handle) { + EVP_CIPHER_CTX_free(aead_ctx->native_handle); + } +} + +int ngtcp2_crypto_cipher_ctx_encrypt_init(ngtcp2_crypto_cipher_ctx *cipher_ctx, + const ngtcp2_crypto_cipher *cipher, + const uint8_t *key) { + EVP_CIPHER_CTX *actx; + + actx = EVP_CIPHER_CTX_new(); + if (actx == NULL) { + return -1; + } + + if (!EVP_EncryptInit_ex(actx, cipher->native_handle, NULL, key, NULL)) { + EVP_CIPHER_CTX_free(actx); + return -1; + } + + cipher_ctx->native_handle = actx; + + return 0; +} + +void ngtcp2_crypto_cipher_ctx_free(ngtcp2_crypto_cipher_ctx *cipher_ctx) { + if (cipher_ctx->native_handle) { + EVP_CIPHER_CTX_free(cipher_ctx->native_handle); + } +} + +int ngtcp2_crypto_hkdf_extract(uint8_t *dest, const ngtcp2_crypto_md *md, + const uint8_t *secret, size_t secretlen, + const uint8_t *salt, size_t saltlen) { +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + const EVP_MD *prf = md->native_handle; + EVP_KDF *kdf = EVP_KDF_fetch(NULL, "hkdf", NULL); + EVP_KDF_CTX *kctx = EVP_KDF_CTX_new(kdf); + int mode = EVP_KDF_HKDF_MODE_EXTRACT_ONLY; + OSSL_PARAM params[] = { + OSSL_PARAM_construct_int(OSSL_KDF_PARAM_MODE, &mode), + OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, + (char *)EVP_MD_get0_name(prf), 0), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, (void *)secret, + secretlen), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, (void *)salt, + saltlen), + OSSL_PARAM_construct_end(), + }; + int rv = 0; + + EVP_KDF_free(kdf); + + if (EVP_KDF_derive(kctx, dest, (size_t)EVP_MD_size(prf), params) <= 0) { + rv = -1; + } + + EVP_KDF_CTX_free(kctx); + + return rv; +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + const EVP_MD *prf = md->native_handle; + int rv = 0; + EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL); + size_t destlen = (size_t)EVP_MD_size(prf); + + if (pctx == NULL) { + return -1; + } + + if (EVP_PKEY_derive_init(pctx) != 1 || + EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXTRACT_ONLY) != 1 || + EVP_PKEY_CTX_set_hkdf_md(pctx, prf) != 1 || + EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, (int)saltlen) != 1 || + EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, (int)secretlen) != 1 || + EVP_PKEY_derive(pctx, dest, &destlen) != 1) { + rv = -1; + } + + EVP_PKEY_CTX_free(pctx); + + return rv; +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ +} + +int ngtcp2_crypto_hkdf_expand(uint8_t *dest, size_t destlen, + const ngtcp2_crypto_md *md, const uint8_t *secret, + size_t secretlen, const uint8_t *info, + size_t infolen) { +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + const EVP_MD *prf = md->native_handle; + EVP_KDF *kdf = EVP_KDF_fetch(NULL, "hkdf", NULL); + EVP_KDF_CTX *kctx = EVP_KDF_CTX_new(kdf); + int mode = EVP_KDF_HKDF_MODE_EXPAND_ONLY; + OSSL_PARAM params[] = { + OSSL_PARAM_construct_int(OSSL_KDF_PARAM_MODE, &mode), + OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, + (char *)EVP_MD_get0_name(prf), 0), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, (void *)secret, + secretlen), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, (void *)info, + infolen), + OSSL_PARAM_construct_end(), + }; + int rv = 0; + + EVP_KDF_free(kdf); + + if (EVP_KDF_derive(kctx, dest, destlen, params) <= 0) { + rv = -1; + } + + EVP_KDF_CTX_free(kctx); + + return rv; +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + const EVP_MD *prf = md->native_handle; + int rv = 0; + EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL); + if (pctx == NULL) { + return -1; + } + + if (EVP_PKEY_derive_init(pctx) != 1 || + EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXPAND_ONLY) != 1 || + EVP_PKEY_CTX_set_hkdf_md(pctx, prf) != 1 || + EVP_PKEY_CTX_set1_hkdf_salt(pctx, (const unsigned char *)"", 0) != 1 || + EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, (int)secretlen) != 1 || + EVP_PKEY_CTX_add1_hkdf_info(pctx, info, (int)infolen) != 1 || + EVP_PKEY_derive(pctx, dest, &destlen) != 1) { + rv = -1; + } + + EVP_PKEY_CTX_free(pctx); + + return rv; +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ +} + +int ngtcp2_crypto_hkdf(uint8_t *dest, size_t destlen, + const ngtcp2_crypto_md *md, const uint8_t *secret, + size_t secretlen, const uint8_t *salt, size_t saltlen, + const uint8_t *info, size_t infolen) { +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + const EVP_MD *prf = md->native_handle; + EVP_KDF *kdf = EVP_KDF_fetch(NULL, "hkdf", NULL); + EVP_KDF_CTX *kctx = EVP_KDF_CTX_new(kdf); + OSSL_PARAM params[] = { + OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST, + (char *)EVP_MD_get0_name(prf), 0), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_KEY, (void *)secret, + secretlen), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT, (void *)salt, + saltlen), + OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_INFO, (void *)info, + infolen), + OSSL_PARAM_construct_end(), + }; + int rv = 0; + + EVP_KDF_free(kdf); + + if (EVP_KDF_derive(kctx, dest, destlen, params) <= 0) { + rv = -1; + } + + EVP_KDF_CTX_free(kctx); + + return rv; +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + const EVP_MD *prf = md->native_handle; + int rv = 0; + EVP_PKEY_CTX *pctx = EVP_PKEY_CTX_new_id(EVP_PKEY_HKDF, NULL); + if (pctx == NULL) { + return -1; + } + + if (EVP_PKEY_derive_init(pctx) != 1 || + EVP_PKEY_CTX_hkdf_mode(pctx, EVP_PKEY_HKDEF_MODE_EXTRACT_AND_EXPAND) != + 1 || + EVP_PKEY_CTX_set_hkdf_md(pctx, prf) != 1 || + EVP_PKEY_CTX_set1_hkdf_salt(pctx, salt, (int)saltlen) != 1 || + EVP_PKEY_CTX_set1_hkdf_key(pctx, secret, (int)secretlen) != 1 || + EVP_PKEY_CTX_add1_hkdf_info(pctx, info, (int)infolen) != 1 || + EVP_PKEY_derive(pctx, dest, &destlen) != 1) { + rv = -1; + } + + EVP_PKEY_CTX_free(pctx); + + return rv; +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ +} + +int ngtcp2_crypto_encrypt(uint8_t *dest, const ngtcp2_crypto_aead *aead, + const ngtcp2_crypto_aead_ctx *aead_ctx, + const uint8_t *plaintext, size_t plaintextlen, + const uint8_t *nonce, size_t noncelen, + const uint8_t *aad, size_t aadlen) { + const EVP_CIPHER *cipher = aead->native_handle; + size_t taglen = crypto_aead_max_overhead(cipher); + int cipher_nid = EVP_CIPHER_nid(cipher); + EVP_CIPHER_CTX *actx = aead_ctx->native_handle; + int len; +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + OSSL_PARAM params[] = { + OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, + dest + plaintextlen, taglen), + OSSL_PARAM_construct_end(), + }; +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + (void)noncelen; + + if (!EVP_EncryptInit_ex(actx, NULL, NULL, NULL, nonce) || + (cipher_nid == NID_aes_128_ccm && + !EVP_EncryptUpdate(actx, NULL, &len, NULL, (int)plaintextlen)) || + !EVP_EncryptUpdate(actx, NULL, &len, aad, (int)aadlen) || + !EVP_EncryptUpdate(actx, dest, &len, plaintext, (int)plaintextlen) || + !EVP_EncryptFinal_ex(actx, dest + len, &len) || +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + !EVP_CIPHER_CTX_get_params(actx, params) +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + !EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_GET_TAG, (int)taglen, + dest + plaintextlen) +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + ) { + return -1; + } + + return 0; +} + +int ngtcp2_crypto_decrypt(uint8_t *dest, const ngtcp2_crypto_aead *aead, + const ngtcp2_crypto_aead_ctx *aead_ctx, + const uint8_t *ciphertext, size_t ciphertextlen, + const uint8_t *nonce, size_t noncelen, + const uint8_t *aad, size_t aadlen) { + const EVP_CIPHER *cipher = aead->native_handle; + size_t taglen = crypto_aead_max_overhead(cipher); + int cipher_nid = EVP_CIPHER_nid(cipher); + EVP_CIPHER_CTX *actx = aead_ctx->native_handle; + int len; + const uint8_t *tag; +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + OSSL_PARAM params[2]; +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + (void)noncelen; + + if (taglen > ciphertextlen) { + return -1; + } + + ciphertextlen -= taglen; + tag = ciphertext + ciphertextlen; + +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + params[0] = OSSL_PARAM_construct_octet_string(OSSL_CIPHER_PARAM_AEAD_TAG, + (void *)tag, taglen); + params[1] = OSSL_PARAM_construct_end(); +#endif /* OPENSSL_VERSION_NUMBER >= 0x30000000L */ + + if (!EVP_DecryptInit_ex(actx, NULL, NULL, NULL, nonce) || +#if OPENSSL_VERSION_NUMBER >= 0x30000000L + !EVP_CIPHER_CTX_set_params(actx, params) || +#else /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + !EVP_CIPHER_CTX_ctrl(actx, EVP_CTRL_AEAD_SET_TAG, (int)taglen, + (uint8_t *)tag) || +#endif /* !(OPENSSL_VERSION_NUMBER >= 0x30000000L) */ + (cipher_nid == NID_aes_128_ccm && + !EVP_DecryptUpdate(actx, NULL, &len, NULL, (int)ciphertextlen)) || + !EVP_DecryptUpdate(actx, NULL, &len, aad, (int)aadlen) || + !EVP_DecryptUpdate(actx, dest, &len, ciphertext, (int)ciphertextlen) || + (cipher_nid != NID_aes_128_ccm && + !EVP_DecryptFinal_ex(actx, dest + ciphertextlen, &len))) { + return -1; + } + + return 0; +} + +int ngtcp2_crypto_hp_mask(uint8_t *dest, const ngtcp2_crypto_cipher *hp, + const ngtcp2_crypto_cipher_ctx *hp_ctx, + const uint8_t *sample) { + static const uint8_t PLAINTEXT[] = "\x00\x00\x00\x00\x00"; + EVP_CIPHER_CTX *actx = hp_ctx->native_handle; + int len; + + (void)hp; + + if (!EVP_EncryptInit_ex(actx, NULL, NULL, NULL, sample) || + !EVP_EncryptUpdate(actx, dest, &len, PLAINTEXT, sizeof(PLAINTEXT) - 1) || + !EVP_EncryptFinal_ex(actx, dest + sizeof(PLAINTEXT) - 1, &len)) { + return -1; + } + + return 0; +} + +int ngtcp2_crypto_read_write_crypto_data(ngtcp2_conn *conn, + ngtcp2_crypto_level crypto_level, + const uint8_t *data, size_t datalen) { + SSL *ssl = ngtcp2_conn_get_tls_native_handle(conn); + int rv; + int err; + + if (SSL_provide_quic_data( + ssl, ngtcp2_crypto_openssl_from_ngtcp2_crypto_level(crypto_level), + data, datalen) != 1) { + return -1; + } + + if (!ngtcp2_conn_get_handshake_completed(conn)) { + rv = SSL_do_handshake(ssl); + if (rv <= 0) { + err = SSL_get_error(ssl, rv); + switch (err) { + case SSL_ERROR_WANT_READ: + case SSL_ERROR_WANT_WRITE: + return 0; + case SSL_ERROR_WANT_CLIENT_HELLO_CB: + return NGTCP2_CRYPTO_OPENSSL_ERR_TLS_WANT_CLIENT_HELLO_CB; + case SSL_ERROR_WANT_X509_LOOKUP: + return NGTCP2_CRYPTO_OPENSSL_ERR_TLS_WANT_X509_LOOKUP; + case SSL_ERROR_SSL: + return -1; + default: + return -1; + } + } + + ngtcp2_conn_handshake_completed(conn); + } + + rv = SSL_process_quic_post_handshake(ssl); + if (rv != 1) { + err = SSL_get_error(ssl, rv); + switch (err) { + case SSL_ERROR_WANT_READ: + case SSL_ERROR_WANT_WRITE: + return 0; + case SSL_ERROR_SSL: + case SSL_ERROR_ZERO_RETURN: + return -1; + default: + return -1; + } + } + + return 0; +} + +int ngtcp2_crypto_set_remote_transport_params(ngtcp2_conn *conn, void *tls) { + SSL *ssl = tls; + const uint8_t *tp; + size_t tplen; + int rv; + + SSL_get_peer_quic_transport_params(ssl, &tp, &tplen); + + rv = ngtcp2_conn_decode_remote_transport_params(conn, tp, tplen); + if (rv != 0) { + ngtcp2_conn_set_tls_error(conn, rv); + return -1; + } + + return 0; +} + +int ngtcp2_crypto_set_local_transport_params(void *tls, const uint8_t *buf, + size_t len) { + if (SSL_set_quic_transport_params(tls, buf, len) != 1) { + return -1; + } + + return 0; +} + +ngtcp2_crypto_level ngtcp2_crypto_openssl_from_ossl_encryption_level( + OSSL_ENCRYPTION_LEVEL ossl_level) { + switch (ossl_level) { + case ssl_encryption_initial: + return NGTCP2_CRYPTO_LEVEL_INITIAL; + case ssl_encryption_early_data: + return NGTCP2_CRYPTO_LEVEL_EARLY; + case ssl_encryption_handshake: + return NGTCP2_CRYPTO_LEVEL_HANDSHAKE; + case ssl_encryption_application: + return NGTCP2_CRYPTO_LEVEL_APPLICATION; + default: + assert(0); + abort(); /* if NDEBUG is set */ + } +} + +OSSL_ENCRYPTION_LEVEL +ngtcp2_crypto_openssl_from_ngtcp2_crypto_level( + ngtcp2_crypto_level crypto_level) { + switch (crypto_level) { + case NGTCP2_CRYPTO_LEVEL_INITIAL: + return ssl_encryption_initial; + case NGTCP2_CRYPTO_LEVEL_HANDSHAKE: + return ssl_encryption_handshake; + case NGTCP2_CRYPTO_LEVEL_APPLICATION: + return ssl_encryption_application; + case NGTCP2_CRYPTO_LEVEL_EARLY: + return ssl_encryption_early_data; + default: + assert(0); + abort(); /* if NDEBUG is set */ + } +} + +int ngtcp2_crypto_get_path_challenge_data_cb(ngtcp2_conn *conn, uint8_t *data, + void *user_data) { + (void)conn; + (void)user_data; + + if (RAND_bytes(data, NGTCP2_PATH_CHALLENGE_DATALEN) != 1) { + return NGTCP2_ERR_CALLBACK_FAILURE; + } + + return 0; +} + +int ngtcp2_crypto_random(uint8_t *data, size_t datalen) { + if (RAND_bytes(data, (int)datalen) != 1) { + return -1; + } + + return 0; +} + +static int set_encryption_secrets(SSL *ssl, OSSL_ENCRYPTION_LEVEL ossl_level, + const uint8_t *rx_secret, + const uint8_t *tx_secret, size_t secretlen) { + ngtcp2_crypto_conn_ref *conn_ref = SSL_get_app_data(ssl); + ngtcp2_conn *conn = conn_ref->get_conn(conn_ref); + ngtcp2_crypto_level level = + ngtcp2_crypto_openssl_from_ossl_encryption_level(ossl_level); + + if (rx_secret && + ngtcp2_crypto_derive_and_install_rx_key(conn, NULL, NULL, NULL, level, + rx_secret, secretlen) != 0) { + return 0; + } + + if (tx_secret && + ngtcp2_crypto_derive_and_install_tx_key(conn, NULL, NULL, NULL, level, + tx_secret, secretlen) != 0) { + return 0; + } + + return 1; +} + +static int add_handshake_data(SSL *ssl, OSSL_ENCRYPTION_LEVEL ossl_level, + const uint8_t *data, size_t datalen) { + ngtcp2_crypto_conn_ref *conn_ref = SSL_get_app_data(ssl); + ngtcp2_conn *conn = conn_ref->get_conn(conn_ref); + ngtcp2_crypto_level level = + ngtcp2_crypto_openssl_from_ossl_encryption_level(ossl_level); + int rv; + + rv = ngtcp2_conn_submit_crypto_data(conn, level, data, datalen); + if (rv != 0) { + ngtcp2_conn_set_tls_error(conn, rv); + return 0; + } + + return 1; +} + +static int flush_flight(SSL *ssl) { + (void)ssl; + return 1; +} + +static int send_alert(SSL *ssl, enum ssl_encryption_level_t level, + uint8_t alert) { + ngtcp2_crypto_conn_ref *conn_ref = SSL_get_app_data(ssl); + ngtcp2_conn *conn = conn_ref->get_conn(conn_ref); + (void)level; + + ngtcp2_conn_set_tls_alert(conn, alert); + + return 1; +} + +static SSL_QUIC_METHOD quic_method = { + set_encryption_secrets, + add_handshake_data, + flush_flight, + send_alert, +}; + +static void crypto_openssl_configure_context(SSL_CTX *ssl_ctx) { + SSL_CTX_set_min_proto_version(ssl_ctx, TLS1_3_VERSION); + SSL_CTX_set_max_proto_version(ssl_ctx, TLS1_3_VERSION); + SSL_CTX_set_quic_method(ssl_ctx, &quic_method); +} + +int ngtcp2_crypto_openssl_configure_server_context(SSL_CTX *ssl_ctx) { + crypto_openssl_configure_context(ssl_ctx); + + return 0; +} + +int ngtcp2_crypto_openssl_configure_client_context(SSL_CTX *ssl_ctx) { + crypto_openssl_configure_context(ssl_ctx); + + return 0; +} |