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319 lines
10 KiB
319 lines
10 KiB
if PACKAGE_libopenssl
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comment "Build Options"
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config OPENSSL_OPTIMIZE_SPEED
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bool
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default y if x86_64 || i386
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prompt "Enable optimization for speed instead of size"
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select OPENSSL_WITH_ASM
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help
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Enabling this option increases code size (around 20%) and
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performance. The increase in performance and size depends on the
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target CPU. EC and AES seem to benefit the most, with EC speed
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increased by 20%-50% (mipsel & x86).
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AES-GCM is supposed to be 3x faster on x86. YMMV.
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config OPENSSL_WITH_ASM
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bool
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default y if !SMALL_FLASH || !arm
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prompt "Compile with optimized assembly code"
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depends on !arc
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help
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Disabling this option will reduce code size and performance.
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The increase in performance and size depends on the target
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CPU and on the algorithms being optimized. As of 1.1.0i*:
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Platform Pkg Inc. Algorithms where assembly is used - ~% Speed Increase
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aarch64 174K BN, aes, sha1, sha256, sha512, nist256, poly1305
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arm 152K BN, aes, sha1, sha256, sha512, nist256, poly1305
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i386 183K BN+147%, aes+300%, rc4+55%, sha1+160%, sha256+114%, sha512+270%, nist256+282%, poly1305+292%
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mipsel 1.5K BN+97%, aes+4%, sha1+94%, sha256+60%
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mips64 3.7K BN, aes, sha1, sha256, sha512, poly1305
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powerpc 20K BN, aes, sha1, sha256, sha512, poly1305
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x86_64 228K BN+220%, aes+173%, rc4+38%, sha1+40%, sha256+64%, sha512+31%, nist256+354%, poly1305+228%
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* Only most common algorithms shown. Your mileage may vary.
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BN (bignum) performance was measured using RSA sign/verify.
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config OPENSSL_WITH_SSE2
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bool
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default y if !TARGET_x86_legacy && !TARGET_x86_geode
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prompt "Enable use of x86 SSE2 instructions"
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depends on OPENSSL_WITH_ASM && i386
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help
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Use of SSE2 instructions greatly increase performance (up to
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3x faster) with a minimum (~0.2%, or 23KB) increase in package
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size, but it will bring no benefit if your hardware does not
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support them, such as Geode GX and LX. In this case you may
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save 23KB by saying yes here. AMD Geode NX, and Intel
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Pentium 4 and above support SSE2.
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config OPENSSL_WITH_DEPRECATED
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bool
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default y
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prompt "Include deprecated APIs (See help for a list of packages that need this)"
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help
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Since openssl 1.1.x is still new to openwrt, some packages
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requiring this option do not list it as a requirement yet:
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* freeswitch-stable, freeswitch, python, python3, squid.
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config OPENSSL_NO_DEPRECATED
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bool
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default !OPENSSL_WITH_DEPRECATED
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config OPENSSL_WITH_ERROR_MESSAGES
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bool
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default y if !SMALL_FLASH && !LOW_MEMORY_FOOTPRINT
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prompt "Include error messages"
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help
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This option aids debugging, but increases package size and
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memory usage.
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comment "Protocol Support"
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config OPENSSL_WITH_TLS13
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bool
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default y
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prompt "Enable support for TLS 1.3"
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select OPENSSL_WITH_EC
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help
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TLS 1.3 is the newest version of the TLS specification.
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It aims:
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* to increase the overall security of the protocol,
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removing outdated algorithms, and encrypting more of the
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protocol;
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* to increase performance by reducing the number of round-trips
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when performing a full handshake.
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It increases package size by ~4KB.
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config OPENSSL_WITH_DTLS
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bool
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prompt "Enable DTLS support"
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help
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Datagram Transport Layer Security (DTLS) provides TLS-like security
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for datagram-based (UDP, DCCP, CAPWAP, SCTP & SRTP) applications.
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config OPENSSL_WITH_NPN
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bool
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prompt "Enable NPN support"
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help
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NPN is a TLS extension, obsoleted and replaced with ALPN,
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used to negotiate SPDY, and HTTP/2.
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config OPENSSL_WITH_SRP
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bool
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default y
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prompt "Enable SRP support"
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help
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The Secure Remote Password protocol (SRP) is an augmented
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password-authenticated key agreement (PAKE) protocol, specifically
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designed to work around existing patents.
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config OPENSSL_WITH_CMS
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bool
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default y
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prompt "Enable CMS (RFC 5652) support"
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help
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Cryptographic Message Syntax (CMS) is used to digitally sign,
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digest, authenticate, or encrypt arbitrary message content.
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comment "Algorithm Selection"
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config OPENSSL_WITH_EC
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bool
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default y
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prompt "Enable elliptic curve support"
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help
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Elliptic-curve cryptography (ECC) is an approach to public-key
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cryptography based on the algebraic structure of elliptic curves
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over finite fields. ECC requires smaller keys compared to non-ECC
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cryptography to provide equivalent security.
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config OPENSSL_WITH_EC2M
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bool
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depends on OPENSSL_WITH_EC
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prompt "Enable ec2m support"
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help
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This option enables the more efficient, yet less common, binary
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field elliptic curves.
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config OPENSSL_WITH_CHACHA_POLY1305
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bool
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default y
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prompt "Enable ChaCha20-Poly1305 ciphersuite support"
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help
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ChaCha20-Poly1305 is an AEAD ciphersuite with 256-bit keys,
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combining ChaCha stream cipher with Poly1305 MAC.
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It is 3x faster than AES, when not using a CPU with AES-specific
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instructions, as is the case of most embedded devices.
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config OPENSSL_PREFER_CHACHA_OVER_GCM
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bool
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default y if !x86_64 && !aarch64
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prompt "Prefer ChaCha20-Poly1305 over AES-GCM by default"
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depends on OPENSSL_WITH_CHACHA_POLY1305
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help
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The default openssl preference is for AES-GCM before ChaCha, but
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that takes into account AES-NI capable chips. It is not the
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case with most embedded chips, so it may be better to invert
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that preference. This is just for the default case. The
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application can always override this.
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config OPENSSL_WITH_PSK
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bool
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default y
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prompt "Enable PSK support"
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help
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Build support for Pre-Shared Key based cipher suites.
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comment "Less commonly used build options"
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config OPENSSL_WITH_ARIA
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bool
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prompt "Enable ARIA support"
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help
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ARIA is a block cipher developed in South Korea, based on AES.
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config OPENSSL_WITH_CAMELLIA
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bool
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prompt "Enable Camellia cipher support"
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help
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Camellia is a bock cipher with security levels and processing
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abilities comparable to AES.
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config OPENSSL_WITH_IDEA
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bool
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prompt "Enable IDEA cipher support"
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help
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IDEA is a block cipher with 128-bit keys.
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config OPENSSL_WITH_SEED
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bool
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prompt "Enable SEED cipher support"
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help
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SEED is a block cipher with 128-bit keys broadly used in
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South Korea, but seldom found elsewhere.
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config OPENSSL_WITH_SM234
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bool
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prompt "Enable SM2/3/4 algorithms support"
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help
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These algorithms are a set of "Commercial Cryptography"
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algorithms approved for use in China.
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* SM2 is an EC algorithm equivalent to ECDSA P-256
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* SM3 is a hash function equivalent to SHA-256
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* SM4 is a 128-block cipher equivalent to AES-128
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config OPENSSL_WITH_BLAKE2
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bool
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prompt "Enable BLAKE2 digest support"
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help
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BLAKE2 is a cryptographic hash function based on the ChaCha
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stream cipher.
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config OPENSSL_WITH_MDC2
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bool
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prompt "Enable MDC2 digest support"
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config OPENSSL_WITH_WHIRLPOOL
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bool
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prompt "Enable Whirlpool digest support"
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config OPENSSL_WITH_COMPRESSION
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bool
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prompt "Enable compression support"
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help
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TLS compression is not recommended, as it is deemed insecure.
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The CRIME attack exploits this weakness.
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Even with this option turned on, it is disabled by default, and the
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application must explicitly turn it on.
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config OPENSSL_WITH_RFC3779
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bool
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prompt "Enable RFC3779 support (BGP)"
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help
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RFC 3779 defines two X.509 v3 certificate extensions. The first
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binds a list of IP address blocks, or prefixes, to the subject of a
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certificate. The second binds a list of autonomous system
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identifiers to the subject of a certificate. These extensions may be
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used to convey the authorization of the subject to use the IP
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addresses and autonomous system identifiers contained in the
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extensions.
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comment "Engine/Hardware Support"
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config OPENSSL_ENGINE
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bool "Enable engine support"
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default y
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help
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This enables alternative cryptography implementations,
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most commonly for interfacing with external crypto devices,
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or supporting new/alternative ciphers and digests.
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If you compile the library with this option disabled, packages built
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using an engine-enabled library (i.e. from the official repo) may
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fail to run. Compile and install the packages with engine support
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disabled, and you should be fine.
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Note that you need to enable KERNEL_AIO to be able to build the
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afalg engine package.
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config OPENSSL_ENGINE_BUILTIN
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bool "Build chosen engines into libcrypto"
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depends on OPENSSL_ENGINE
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help
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This builds all chosen engines into libcrypto.so, instead of building
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them as dynamic engines in separate packages.
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The benefit of building the engines into libcrypto is that they won't
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require any configuration to be used by default.
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config OPENSSL_ENGINE_BUILTIN_AFALG
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bool
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prompt "Acceleration support through AF_ALG sockets engine"
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depends on OPENSSL_ENGINE_BUILTIN && KERNEL_AIO
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select PACKAGE_libopenssl-conf
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help
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This enables use of hardware acceleration through the
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AF_ALG kernel interface.
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config OPENSSL_ENGINE_BUILTIN_DEVCRYPTO
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bool
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prompt "Acceleration support through /dev/crypto"
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depends on OPENSSL_ENGINE_BUILTIN
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select PACKAGE_libopenssl-conf
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help
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This enables use of hardware acceleration through OpenBSD
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Cryptodev API (/dev/crypto) interface.
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Even though configuration is not strictly needed, it is worth seeing
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https://openwrt.org/docs/techref/hardware/cryptographic.hardware.accelerators
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for information on how to configure the engine.
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config OPENSSL_ENGINE_BUILTIN_PADLOCK
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bool
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prompt "VIA Padlock Acceleration support engine"
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depends on OPENSSL_ENGINE_BUILTIN && TARGET_x86
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select PACKAGE_libopenssl-conf
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help
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This enables use of hardware acceleration through the
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VIA Padlock module.
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config OPENSSL_WITH_ASYNC
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bool
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prompt "Enable asynchronous jobs support"
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depends on OPENSSL_ENGINE && USE_GLIBC
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help
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Enables async-aware applications to be able to use OpenSSL to
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initiate crypto operations asynchronously. In order to work
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this will require the presence of an async capable engine.
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config OPENSSL_WITH_GOST
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bool
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prompt "Prepare library for GOST engine"
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depends on OPENSSL_ENGINE
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help
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This option prepares the library to accept engine support
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for Russian GOST crypto algorithms.
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The gost engine is not included in standard openwrt feeds.
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To build such engine yourself, see:
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https://github.com/gost-engine/engine
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endif
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