sys/linux/socket_alg.txt

# Copyright 2017 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.

# AF_ALG support.

include <linux/socket.h>
include <linux/net.h>
include <linux/crypto.h>
include <uapi/linux/if_alg.h>

resource sock_alg[sock]
resource sock_algconn[sock]

socket$alg(domain const[AF_ALG], type const[SOCK_SEQPACKET], proto const[0]) sock_alg
bind$alg(fd sock_alg, addr ptr[in, sockaddr_alg], addrlen len[addr])
setsockopt$ALG_SET_KEY(fd sock_alg, level const[SOL_ALG], opt const[ALG_SET_KEY], key buffer[in], keylen len[key])
setsockopt$ALG_SET_AEAD_AUTHSIZE(fd sock_alg, level const[SOL_ALG], opt const[ALG_SET_AEAD_AUTHSIZE], val const[0], size intptr)
accept$alg(fd sock_alg, peer const[0], peerlen const[0]) sock_algconn
accept4$alg(fd sock_alg, peer const[0], peerlen const[0], flags flags[accept_flags]) sock_algconn
sendmsg$alg(fd sock_algconn, msg ptr[in, msghdr_alg], f flags[send_flags])
sendmmsg$alg(fd sock_algconn, mmsg ptr[in, array[msghdr_alg]], vlen len[mmsg], f flags[send_flags])
read$alg(fd sock_algconn, buf buffer[out], size len[buf])

# Special struct generated by Go code.
sockaddr_alg {
	family	const[AF_ALG, int16]
	type	string["filled later", 14]
	feat	flags[af_alg_type, int32]
	mask	flags[af_alg_type, int32]
	name	string["filled later", 64]
}

# Special struct generated by Go code.
alg_name {
	name	string["filled later", 64]
}

# Special struct generated by Go code.
alg_aead_name {
	name	string["filled later", 64]
}

# Special struct generated by Go code.
alg_hash_name {
	name	string["filled later", 64]
}

# Special struct generated by Go code.
alg_blkcipher_name {
	name	string["filled later", 64]
}

alg_compress_name {
	name	string[alg_compress_names, 64]
}

# This is what XFRM supports (see xfrm_calg_list).
alg_compress_names = "deflate", "lzs", "lzjh"

msghdr_alg {
	addr	const[0, intptr]
	addrlen	const[0, int32]
	vec	ptr[in, array[iovec_in]]
	vlen	len[vec, intptr]
	ctrl	ptr[in, array[cmsghdr_alg], opt]
	ctrllen	bytesize[ctrl, intptr]
	f	flags[send_flags, int32]
}

cmsghdr_alg [
	iv	cmsghdr_alg_iv
	op	cmsghdr_alg_op
	assoc	cmsghdr_alg_assoc
] [varlen]

cmsghdr_alg_iv {
	len	len[parent, intptr]
	level	const[SOL_ALG, int32]
	type	const[ALG_SET_IV, int32]
	ivlen	len[iv, int32]
	iv	array[int8]
} [align_ptr]

cmsghdr_alg_op {
	len	len[parent, intptr]
	level	const[SOL_ALG, int32]
	type	const[ALG_SET_OP, int32]
	op	flags[alg_op_op, int32]
} [align_ptr]

cmsghdr_alg_assoc {
	len	len[parent, intptr]
	level	const[SOL_ALG, int32]
	type	const[ALG_SET_AEAD_ASSOCLEN, int32]
	assoc	int32
} [align_ptr]

af_alg_type = CRYPTO_ALG_TYPE_MASK, CRYPTO_ALG_TYPE_CIPHER, CRYPTO_ALG_TYPE_COMPRESS, CRYPTO_ALG_TYPE_AEAD, CRYPTO_ALG_TYPE_BLKCIPHER, CRYPTO_ALG_TYPE_ABLKCIPHER, CRYPTO_ALG_TYPE_DIGEST, CRYPTO_ALG_TYPE_HASH, CRYPTO_ALG_TYPE_SHASH, CRYPTO_ALG_TYPE_AHASH, CRYPTO_ALG_TYPE_RNG, CRYPTO_ALG_TYPE_AKCIPHER, CRYPTO_ALG_TYPE_PCOMPRESS, CRYPTO_ALG_LARVAL, CRYPTO_ALG_DEAD, CRYPTO_ALG_DYING, CRYPTO_ALG_ASYNC, CRYPTO_ALG_NEED_FALLBACK, CRYPTO_ALG_TESTED, CRYPTO_ALG_INSTANCE, CRYPTO_ALG_KERN_DRIVER_ONLY, CRYPTO_ALG_INTERNAL

alg_op_op = ALG_OP_DECRYPT, ALG_OP_ENCRYPT

# Removed in next-20160210 (commit 11049218)
define CRYPTO_ALG_TYPE_PCOMPRESS	0x0000000f