diff options
Diffstat (limited to 'NorthstarDLL/include/internal/ktls.h')
| -rw-r--r-- | NorthstarDLL/include/internal/ktls.h | 808 |
1 files changed, 404 insertions, 404 deletions
diff --git a/NorthstarDLL/include/internal/ktls.h b/NorthstarDLL/include/internal/ktls.h index 95492fd0..8fca812f 100644 --- a/NorthstarDLL/include/internal/ktls.h +++ b/NorthstarDLL/include/internal/ktls.h @@ -1,404 +1,404 @@ -/* - * Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved. - * - * Licensed under the Apache License 2.0 (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 - */ - -#if defined(OPENSSL_SYS_LINUX) -# ifndef OPENSSL_NO_KTLS -# include <linux/version.h> -# if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0) -# define OPENSSL_NO_KTLS -# ifndef PEDANTIC -# warning "KTLS requires Kernel Headers >= 4.13.0" -# warning "Skipping Compilation of KTLS" -# endif -# endif -# endif -#endif - -#ifndef HEADER_INTERNAL_KTLS -# define HEADER_INTERNAL_KTLS -# pragma once - -# ifndef OPENSSL_NO_KTLS - -# if defined(__FreeBSD__) -# include <sys/types.h> -# include <sys/socket.h> -# include <sys/ktls.h> -# include <netinet/in.h> -# include <netinet/tcp.h> -# include <openssl/ssl3.h> - -# ifndef TCP_RXTLS_ENABLE -# define OPENSSL_NO_KTLS_RX -# endif -# define OPENSSL_KTLS_AES_GCM_128 -# define OPENSSL_KTLS_AES_GCM_256 -# define OPENSSL_KTLS_TLS13 - -typedef struct tls_enable ktls_crypto_info_t; - -/* - * FreeBSD does not require any additional steps to enable KTLS before - * setting keys. - */ -static ossl_inline int ktls_enable(int fd) -{ - return 1; -} - -/* - * The TCP_TXTLS_ENABLE socket option marks the outgoing socket buffer - * as using TLS. If successful, then data sent using this socket will - * be encrypted and encapsulated in TLS records using the tls_en - * provided here. - * - * The TCP_RXTLS_ENABLE socket option marks the incoming socket buffer - * as using TLS. If successful, then data received for this socket will - * be authenticated and decrypted using the tls_en provided here. - */ -static ossl_inline int ktls_start(int fd, ktls_crypto_info_t *tls_en, int is_tx) -{ - if (is_tx) - return setsockopt(fd, IPPROTO_TCP, TCP_TXTLS_ENABLE, - tls_en, sizeof(*tls_en)) ? 0 : 1; -# ifndef OPENSSL_NO_KTLS_RX - return setsockopt(fd, IPPROTO_TCP, TCP_RXTLS_ENABLE, tls_en, - sizeof(*tls_en)) ? 0 : 1; -# else - return 0; -# endif -} - -/* - * Send a TLS record using the tls_en provided in ktls_start and use - * record_type instead of the default SSL3_RT_APPLICATION_DATA. - * When the socket is non-blocking, then this call either returns EAGAIN or - * the entire record is pushed to TCP. It is impossible to send a partial - * record using this control message. - */ -static ossl_inline int ktls_send_ctrl_message(int fd, unsigned char record_type, - const void *data, size_t length) -{ - struct msghdr msg = { 0 }; - int cmsg_len = sizeof(record_type); - struct cmsghdr *cmsg; - char buf[CMSG_SPACE(cmsg_len)]; - struct iovec msg_iov; /* Vector of data to send/receive into */ - - msg.msg_control = buf; - msg.msg_controllen = sizeof(buf); - cmsg = CMSG_FIRSTHDR(&msg); - cmsg->cmsg_level = IPPROTO_TCP; - cmsg->cmsg_type = TLS_SET_RECORD_TYPE; - cmsg->cmsg_len = CMSG_LEN(cmsg_len); - *((unsigned char *)CMSG_DATA(cmsg)) = record_type; - msg.msg_controllen = cmsg->cmsg_len; - - msg_iov.iov_base = (void *)data; - msg_iov.iov_len = length; - msg.msg_iov = &msg_iov; - msg.msg_iovlen = 1; - - return sendmsg(fd, &msg, 0); -} - -# ifdef OPENSSL_NO_KTLS_RX - -static ossl_inline int ktls_read_record(int fd, void *data, size_t length) -{ - return -1; -} - -# else /* !defined(OPENSSL_NO_KTLS_RX) */ - -/* - * Receive a TLS record using the tls_en provided in ktls_start. The - * kernel strips any explicit IV and authentication tag, but provides - * the TLS record header via a control message. If there is an error - * with the TLS record such as an invalid header, invalid padding, or - * authentication failure recvmsg() will fail with an error. - */ -static ossl_inline int ktls_read_record(int fd, void *data, size_t length) -{ - struct msghdr msg = { 0 }; - int cmsg_len = sizeof(struct tls_get_record); - struct tls_get_record *tgr; - struct cmsghdr *cmsg; - char buf[CMSG_SPACE(cmsg_len)]; - struct iovec msg_iov; /* Vector of data to send/receive into */ - int ret; - unsigned char *p = data; - const size_t prepend_length = SSL3_RT_HEADER_LENGTH; - - if (length <= prepend_length) { - errno = EINVAL; - return -1; - } - - msg.msg_control = buf; - msg.msg_controllen = sizeof(buf); - - msg_iov.iov_base = p + prepend_length; - msg_iov.iov_len = length - prepend_length; - msg.msg_iov = &msg_iov; - msg.msg_iovlen = 1; - - ret = recvmsg(fd, &msg, 0); - if (ret <= 0) - return ret; - - if ((msg.msg_flags & (MSG_EOR | MSG_CTRUNC)) != MSG_EOR) { - errno = EMSGSIZE; - return -1; - } - - if (msg.msg_controllen == 0) { - errno = EBADMSG; - return -1; - } - - cmsg = CMSG_FIRSTHDR(&msg); - if (cmsg->cmsg_level != IPPROTO_TCP || cmsg->cmsg_type != TLS_GET_RECORD - || cmsg->cmsg_len != CMSG_LEN(cmsg_len)) { - errno = EBADMSG; - return -1; - } - - tgr = (struct tls_get_record *)CMSG_DATA(cmsg); - p[0] = tgr->tls_type; - p[1] = tgr->tls_vmajor; - p[2] = tgr->tls_vminor; - *(uint16_t *)(p + 3) = htons(ret); - - return ret + prepend_length; -} - -# endif /* OPENSSL_NO_KTLS_RX */ - -/* - * KTLS enables the sendfile system call to send data from a file over - * TLS. - */ -static ossl_inline ossl_ssize_t ktls_sendfile(int s, int fd, off_t off, - size_t size, int flags) -{ - off_t sbytes = 0; - int ret; - - ret = sendfile(fd, s, off, size, NULL, &sbytes, flags); - if (ret == -1 && sbytes == 0) - return -1; - return sbytes; -} - -# endif /* __FreeBSD__ */ - -# if defined(OPENSSL_SYS_LINUX) - -# include <linux/tls.h> -# if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0) -# define OPENSSL_NO_KTLS_RX -# ifndef PEDANTIC -# warning "KTLS requires Kernel Headers >= 4.17.0 for receiving" -# warning "Skipping Compilation of KTLS receive data path" -# endif -# endif -# define OPENSSL_KTLS_AES_GCM_128 -# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0) -# define OPENSSL_KTLS_AES_GCM_256 -# define OPENSSL_KTLS_TLS13 -# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0) -# define OPENSSL_KTLS_AES_CCM_128 -# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 11, 0) -# ifndef OPENSSL_NO_CHACHA -# define OPENSSL_KTLS_CHACHA20_POLY1305 -# endif -# endif -# endif -# endif - -# include <sys/sendfile.h> -# include <netinet/tcp.h> -# include <linux/socket.h> -# include <openssl/ssl3.h> -# include <openssl/tls1.h> -# include <openssl/evp.h> - -# ifndef SOL_TLS -# define SOL_TLS 282 -# endif - -# ifndef TCP_ULP -# define TCP_ULP 31 -# endif - -# ifndef TLS_RX -# define TLS_RX 2 -# endif - -struct tls_crypto_info_all { - union { -# ifdef OPENSSL_KTLS_AES_GCM_128 - struct tls12_crypto_info_aes_gcm_128 gcm128; -# endif -# ifdef OPENSSL_KTLS_AES_GCM_256 - struct tls12_crypto_info_aes_gcm_256 gcm256; -# endif -# ifdef OPENSSL_KTLS_AES_CCM_128 - struct tls12_crypto_info_aes_ccm_128 ccm128; -# endif -# ifdef OPENSSL_KTLS_CHACHA20_POLY1305 - struct tls12_crypto_info_chacha20_poly1305 chacha20poly1305; -# endif - }; - size_t tls_crypto_info_len; -}; - -typedef struct tls_crypto_info_all ktls_crypto_info_t; - -/* - * When successful, this socket option doesn't change the behaviour of the - * TCP socket, except changing the TCP setsockopt handler to enable the - * processing of SOL_TLS socket options. All other functionality remains the - * same. - */ -static ossl_inline int ktls_enable(int fd) -{ - return setsockopt(fd, SOL_TCP, TCP_ULP, "tls", sizeof("tls")) ? 0 : 1; -} - -/* - * The TLS_TX socket option changes the send/sendmsg handlers of the TCP socket. - * If successful, then data sent using this socket will be encrypted and - * encapsulated in TLS records using the crypto_info provided here. - * The TLS_RX socket option changes the recv/recvmsg handlers of the TCP socket. - * If successful, then data received using this socket will be decrypted, - * authenticated and decapsulated using the crypto_info provided here. - */ -static ossl_inline int ktls_start(int fd, ktls_crypto_info_t *crypto_info, - int is_tx) -{ - return setsockopt(fd, SOL_TLS, is_tx ? TLS_TX : TLS_RX, - crypto_info, crypto_info->tls_crypto_info_len) ? 0 : 1; -} - -/* - * Send a TLS record using the crypto_info provided in ktls_start and use - * record_type instead of the default SSL3_RT_APPLICATION_DATA. - * When the socket is non-blocking, then this call either returns EAGAIN or - * the entire record is pushed to TCP. It is impossible to send a partial - * record using this control message. - */ -static ossl_inline int ktls_send_ctrl_message(int fd, unsigned char record_type, - const void *data, size_t length) -{ - struct msghdr msg; - int cmsg_len = sizeof(record_type); - struct cmsghdr *cmsg; - union { - struct cmsghdr hdr; - char buf[CMSG_SPACE(sizeof(unsigned char))]; - } cmsgbuf; - struct iovec msg_iov; /* Vector of data to send/receive into */ - - memset(&msg, 0, sizeof(msg)); - msg.msg_control = cmsgbuf.buf; - msg.msg_controllen = sizeof(cmsgbuf.buf); - cmsg = CMSG_FIRSTHDR(&msg); - cmsg->cmsg_level = SOL_TLS; - cmsg->cmsg_type = TLS_SET_RECORD_TYPE; - cmsg->cmsg_len = CMSG_LEN(cmsg_len); - *((unsigned char *)CMSG_DATA(cmsg)) = record_type; - msg.msg_controllen = cmsg->cmsg_len; - - msg_iov.iov_base = (void *)data; - msg_iov.iov_len = length; - msg.msg_iov = &msg_iov; - msg.msg_iovlen = 1; - - return sendmsg(fd, &msg, 0); -} - -/* - * KTLS enables the sendfile system call to send data from a file over TLS. - * @flags are ignored on Linux. (placeholder for FreeBSD sendfile) - * */ -static ossl_inline ossl_ssize_t ktls_sendfile(int s, int fd, off_t off, size_t size, int flags) -{ - return sendfile(s, fd, &off, size); -} - -# ifdef OPENSSL_NO_KTLS_RX - - -static ossl_inline int ktls_read_record(int fd, void *data, size_t length) -{ - return -1; -} - -# else /* !defined(OPENSSL_NO_KTLS_RX) */ - -/* - * Receive a TLS record using the crypto_info provided in ktls_start. - * The kernel strips the TLS record header, IV and authentication tag, - * returning only the plaintext data or an error on failure. - * We add the TLS record header here to satisfy routines in rec_layer_s3.c - */ -static ossl_inline int ktls_read_record(int fd, void *data, size_t length) -{ - struct msghdr msg; - struct cmsghdr *cmsg; - union { - struct cmsghdr hdr; - char buf[CMSG_SPACE(sizeof(unsigned char))]; - } cmsgbuf; - struct iovec msg_iov; - int ret; - unsigned char *p = data; - const size_t prepend_length = SSL3_RT_HEADER_LENGTH; - - if (length < prepend_length + EVP_GCM_TLS_TAG_LEN) { - errno = EINVAL; - return -1; - } - - memset(&msg, 0, sizeof(msg)); - msg.msg_control = cmsgbuf.buf; - msg.msg_controllen = sizeof(cmsgbuf.buf); - - msg_iov.iov_base = p + prepend_length; - msg_iov.iov_len = length - prepend_length - EVP_GCM_TLS_TAG_LEN; - msg.msg_iov = &msg_iov; - msg.msg_iovlen = 1; - - ret = recvmsg(fd, &msg, 0); - if (ret < 0) - return ret; - - if (msg.msg_controllen > 0) { - cmsg = CMSG_FIRSTHDR(&msg); - if (cmsg->cmsg_type == TLS_GET_RECORD_TYPE) { - p[0] = *((unsigned char *)CMSG_DATA(cmsg)); - p[1] = TLS1_2_VERSION_MAJOR; - p[2] = TLS1_2_VERSION_MINOR; - /* returned length is limited to msg_iov.iov_len above */ - p[3] = (ret >> 8) & 0xff; - p[4] = ret & 0xff; - ret += prepend_length; - } - } - - return ret; -} - -# endif /* OPENSSL_NO_KTLS_RX */ - -# endif /* OPENSSL_SYS_LINUX */ -# endif /* OPENSSL_NO_KTLS */ -#endif /* HEADER_INTERNAL_KTLS */ +/*
+ * Copyright 2018-2021 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (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
+ */
+
+#if defined(OPENSSL_SYS_LINUX)
+# ifndef OPENSSL_NO_KTLS
+# include <linux/version.h>
+# if LINUX_VERSION_CODE < KERNEL_VERSION(4, 13, 0)
+# define OPENSSL_NO_KTLS
+# ifndef PEDANTIC
+# warning "KTLS requires Kernel Headers >= 4.13.0"
+# warning "Skipping Compilation of KTLS"
+# endif
+# endif
+# endif
+#endif
+
+#ifndef HEADER_INTERNAL_KTLS
+# define HEADER_INTERNAL_KTLS
+# pragma once
+
+# ifndef OPENSSL_NO_KTLS
+
+# if defined(__FreeBSD__)
+# include <sys/types.h>
+# include <sys/socket.h>
+# include <sys/ktls.h>
+# include <netinet/in.h>
+# include <netinet/tcp.h>
+# include <openssl/ssl3.h>
+
+# ifndef TCP_RXTLS_ENABLE
+# define OPENSSL_NO_KTLS_RX
+# endif
+# define OPENSSL_KTLS_AES_GCM_128
+# define OPENSSL_KTLS_AES_GCM_256
+# define OPENSSL_KTLS_TLS13
+
+typedef struct tls_enable ktls_crypto_info_t;
+
+/*
+ * FreeBSD does not require any additional steps to enable KTLS before
+ * setting keys.
+ */
+static ossl_inline int ktls_enable(int fd)
+{
+ return 1;
+}
+
+/*
+ * The TCP_TXTLS_ENABLE socket option marks the outgoing socket buffer
+ * as using TLS. If successful, then data sent using this socket will
+ * be encrypted and encapsulated in TLS records using the tls_en
+ * provided here.
+ *
+ * The TCP_RXTLS_ENABLE socket option marks the incoming socket buffer
+ * as using TLS. If successful, then data received for this socket will
+ * be authenticated and decrypted using the tls_en provided here.
+ */
+static ossl_inline int ktls_start(int fd, ktls_crypto_info_t *tls_en, int is_tx)
+{
+ if (is_tx)
+ return setsockopt(fd, IPPROTO_TCP, TCP_TXTLS_ENABLE,
+ tls_en, sizeof(*tls_en)) ? 0 : 1;
+# ifndef OPENSSL_NO_KTLS_RX
+ return setsockopt(fd, IPPROTO_TCP, TCP_RXTLS_ENABLE, tls_en,
+ sizeof(*tls_en)) ? 0 : 1;
+# else
+ return 0;
+# endif
+}
+
+/*
+ * Send a TLS record using the tls_en provided in ktls_start and use
+ * record_type instead of the default SSL3_RT_APPLICATION_DATA.
+ * When the socket is non-blocking, then this call either returns EAGAIN or
+ * the entire record is pushed to TCP. It is impossible to send a partial
+ * record using this control message.
+ */
+static ossl_inline int ktls_send_ctrl_message(int fd, unsigned char record_type,
+ const void *data, size_t length)
+{
+ struct msghdr msg = { 0 };
+ int cmsg_len = sizeof(record_type);
+ struct cmsghdr *cmsg;
+ char buf[CMSG_SPACE(cmsg_len)];
+ struct iovec msg_iov; /* Vector of data to send/receive into */
+
+ msg.msg_control = buf;
+ msg.msg_controllen = sizeof(buf);
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = IPPROTO_TCP;
+ cmsg->cmsg_type = TLS_SET_RECORD_TYPE;
+ cmsg->cmsg_len = CMSG_LEN(cmsg_len);
+ *((unsigned char *)CMSG_DATA(cmsg)) = record_type;
+ msg.msg_controllen = cmsg->cmsg_len;
+
+ msg_iov.iov_base = (void *)data;
+ msg_iov.iov_len = length;
+ msg.msg_iov = &msg_iov;
+ msg.msg_iovlen = 1;
+
+ return sendmsg(fd, &msg, 0);
+}
+
+# ifdef OPENSSL_NO_KTLS_RX
+
+static ossl_inline int ktls_read_record(int fd, void *data, size_t length)
+{
+ return -1;
+}
+
+# else /* !defined(OPENSSL_NO_KTLS_RX) */
+
+/*
+ * Receive a TLS record using the tls_en provided in ktls_start. The
+ * kernel strips any explicit IV and authentication tag, but provides
+ * the TLS record header via a control message. If there is an error
+ * with the TLS record such as an invalid header, invalid padding, or
+ * authentication failure recvmsg() will fail with an error.
+ */
+static ossl_inline int ktls_read_record(int fd, void *data, size_t length)
+{
+ struct msghdr msg = { 0 };
+ int cmsg_len = sizeof(struct tls_get_record);
+ struct tls_get_record *tgr;
+ struct cmsghdr *cmsg;
+ char buf[CMSG_SPACE(cmsg_len)];
+ struct iovec msg_iov; /* Vector of data to send/receive into */
+ int ret;
+ unsigned char *p = data;
+ const size_t prepend_length = SSL3_RT_HEADER_LENGTH;
+
+ if (length <= prepend_length) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ msg.msg_control = buf;
+ msg.msg_controllen = sizeof(buf);
+
+ msg_iov.iov_base = p + prepend_length;
+ msg_iov.iov_len = length - prepend_length;
+ msg.msg_iov = &msg_iov;
+ msg.msg_iovlen = 1;
+
+ ret = recvmsg(fd, &msg, 0);
+ if (ret <= 0)
+ return ret;
+
+ if ((msg.msg_flags & (MSG_EOR | MSG_CTRUNC)) != MSG_EOR) {
+ errno = EMSGSIZE;
+ return -1;
+ }
+
+ if (msg.msg_controllen == 0) {
+ errno = EBADMSG;
+ return -1;
+ }
+
+ cmsg = CMSG_FIRSTHDR(&msg);
+ if (cmsg->cmsg_level != IPPROTO_TCP || cmsg->cmsg_type != TLS_GET_RECORD
+ || cmsg->cmsg_len != CMSG_LEN(cmsg_len)) {
+ errno = EBADMSG;
+ return -1;
+ }
+
+ tgr = (struct tls_get_record *)CMSG_DATA(cmsg);
+ p[0] = tgr->tls_type;
+ p[1] = tgr->tls_vmajor;
+ p[2] = tgr->tls_vminor;
+ *(uint16_t *)(p + 3) = htons(ret);
+
+ return ret + prepend_length;
+}
+
+# endif /* OPENSSL_NO_KTLS_RX */
+
+/*
+ * KTLS enables the sendfile system call to send data from a file over
+ * TLS.
+ */
+static ossl_inline ossl_ssize_t ktls_sendfile(int s, int fd, off_t off,
+ size_t size, int flags)
+{
+ off_t sbytes = 0;
+ int ret;
+
+ ret = sendfile(fd, s, off, size, NULL, &sbytes, flags);
+ if (ret == -1 && sbytes == 0)
+ return -1;
+ return sbytes;
+}
+
+# endif /* __FreeBSD__ */
+
+# if defined(OPENSSL_SYS_LINUX)
+
+# include <linux/tls.h>
+# if LINUX_VERSION_CODE < KERNEL_VERSION(4, 17, 0)
+# define OPENSSL_NO_KTLS_RX
+# ifndef PEDANTIC
+# warning "KTLS requires Kernel Headers >= 4.17.0 for receiving"
+# warning "Skipping Compilation of KTLS receive data path"
+# endif
+# endif
+# define OPENSSL_KTLS_AES_GCM_128
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0)
+# define OPENSSL_KTLS_AES_GCM_256
+# define OPENSSL_KTLS_TLS13
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 2, 0)
+# define OPENSSL_KTLS_AES_CCM_128
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 11, 0)
+# ifndef OPENSSL_NO_CHACHA
+# define OPENSSL_KTLS_CHACHA20_POLY1305
+# endif
+# endif
+# endif
+# endif
+
+# include <sys/sendfile.h>
+# include <netinet/tcp.h>
+# include <linux/socket.h>
+# include <openssl/ssl3.h>
+# include <openssl/tls1.h>
+# include <openssl/evp.h>
+
+# ifndef SOL_TLS
+# define SOL_TLS 282
+# endif
+
+# ifndef TCP_ULP
+# define TCP_ULP 31
+# endif
+
+# ifndef TLS_RX
+# define TLS_RX 2
+# endif
+
+struct tls_crypto_info_all {
+ union {
+# ifdef OPENSSL_KTLS_AES_GCM_128
+ struct tls12_crypto_info_aes_gcm_128 gcm128;
+# endif
+# ifdef OPENSSL_KTLS_AES_GCM_256
+ struct tls12_crypto_info_aes_gcm_256 gcm256;
+# endif
+# ifdef OPENSSL_KTLS_AES_CCM_128
+ struct tls12_crypto_info_aes_ccm_128 ccm128;
+# endif
+# ifdef OPENSSL_KTLS_CHACHA20_POLY1305
+ struct tls12_crypto_info_chacha20_poly1305 chacha20poly1305;
+# endif
+ };
+ size_t tls_crypto_info_len;
+};
+
+typedef struct tls_crypto_info_all ktls_crypto_info_t;
+
+/*
+ * When successful, this socket option doesn't change the behaviour of the
+ * TCP socket, except changing the TCP setsockopt handler to enable the
+ * processing of SOL_TLS socket options. All other functionality remains the
+ * same.
+ */
+static ossl_inline int ktls_enable(int fd)
+{
+ return setsockopt(fd, SOL_TCP, TCP_ULP, "tls", sizeof("tls")) ? 0 : 1;
+}
+
+/*
+ * The TLS_TX socket option changes the send/sendmsg handlers of the TCP socket.
+ * If successful, then data sent using this socket will be encrypted and
+ * encapsulated in TLS records using the crypto_info provided here.
+ * The TLS_RX socket option changes the recv/recvmsg handlers of the TCP socket.
+ * If successful, then data received using this socket will be decrypted,
+ * authenticated and decapsulated using the crypto_info provided here.
+ */
+static ossl_inline int ktls_start(int fd, ktls_crypto_info_t *crypto_info,
+ int is_tx)
+{
+ return setsockopt(fd, SOL_TLS, is_tx ? TLS_TX : TLS_RX,
+ crypto_info, crypto_info->tls_crypto_info_len) ? 0 : 1;
+}
+
+/*
+ * Send a TLS record using the crypto_info provided in ktls_start and use
+ * record_type instead of the default SSL3_RT_APPLICATION_DATA.
+ * When the socket is non-blocking, then this call either returns EAGAIN or
+ * the entire record is pushed to TCP. It is impossible to send a partial
+ * record using this control message.
+ */
+static ossl_inline int ktls_send_ctrl_message(int fd, unsigned char record_type,
+ const void *data, size_t length)
+{
+ struct msghdr msg;
+ int cmsg_len = sizeof(record_type);
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr hdr;
+ char buf[CMSG_SPACE(sizeof(unsigned char))];
+ } cmsgbuf;
+ struct iovec msg_iov; /* Vector of data to send/receive into */
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_control = cmsgbuf.buf;
+ msg.msg_controllen = sizeof(cmsgbuf.buf);
+ cmsg = CMSG_FIRSTHDR(&msg);
+ cmsg->cmsg_level = SOL_TLS;
+ cmsg->cmsg_type = TLS_SET_RECORD_TYPE;
+ cmsg->cmsg_len = CMSG_LEN(cmsg_len);
+ *((unsigned char *)CMSG_DATA(cmsg)) = record_type;
+ msg.msg_controllen = cmsg->cmsg_len;
+
+ msg_iov.iov_base = (void *)data;
+ msg_iov.iov_len = length;
+ msg.msg_iov = &msg_iov;
+ msg.msg_iovlen = 1;
+
+ return sendmsg(fd, &msg, 0);
+}
+
+/*
+ * KTLS enables the sendfile system call to send data from a file over TLS.
+ * @flags are ignored on Linux. (placeholder for FreeBSD sendfile)
+ * */
+static ossl_inline ossl_ssize_t ktls_sendfile(int s, int fd, off_t off, size_t size, int flags)
+{
+ return sendfile(s, fd, &off, size);
+}
+
+# ifdef OPENSSL_NO_KTLS_RX
+
+
+static ossl_inline int ktls_read_record(int fd, void *data, size_t length)
+{
+ return -1;
+}
+
+# else /* !defined(OPENSSL_NO_KTLS_RX) */
+
+/*
+ * Receive a TLS record using the crypto_info provided in ktls_start.
+ * The kernel strips the TLS record header, IV and authentication tag,
+ * returning only the plaintext data or an error on failure.
+ * We add the TLS record header here to satisfy routines in rec_layer_s3.c
+ */
+static ossl_inline int ktls_read_record(int fd, void *data, size_t length)
+{
+ struct msghdr msg;
+ struct cmsghdr *cmsg;
+ union {
+ struct cmsghdr hdr;
+ char buf[CMSG_SPACE(sizeof(unsigned char))];
+ } cmsgbuf;
+ struct iovec msg_iov;
+ int ret;
+ unsigned char *p = data;
+ const size_t prepend_length = SSL3_RT_HEADER_LENGTH;
+
+ if (length < prepend_length + EVP_GCM_TLS_TAG_LEN) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ memset(&msg, 0, sizeof(msg));
+ msg.msg_control = cmsgbuf.buf;
+ msg.msg_controllen = sizeof(cmsgbuf.buf);
+
+ msg_iov.iov_base = p + prepend_length;
+ msg_iov.iov_len = length - prepend_length - EVP_GCM_TLS_TAG_LEN;
+ msg.msg_iov = &msg_iov;
+ msg.msg_iovlen = 1;
+
+ ret = recvmsg(fd, &msg, 0);
+ if (ret < 0)
+ return ret;
+
+ if (msg.msg_controllen > 0) {
+ cmsg = CMSG_FIRSTHDR(&msg);
+ if (cmsg->cmsg_type == TLS_GET_RECORD_TYPE) {
+ p[0] = *((unsigned char *)CMSG_DATA(cmsg));
+ p[1] = TLS1_2_VERSION_MAJOR;
+ p[2] = TLS1_2_VERSION_MINOR;
+ /* returned length is limited to msg_iov.iov_len above */
+ p[3] = (ret >> 8) & 0xff;
+ p[4] = ret & 0xff;
+ ret += prepend_length;
+ }
+ }
+
+ return ret;
+}
+
+# endif /* OPENSSL_NO_KTLS_RX */
+
+# endif /* OPENSSL_SYS_LINUX */
+# endif /* OPENSSL_NO_KTLS */
+#endif /* HEADER_INTERNAL_KTLS */
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