commit bd1c1c4aa0dbcb7a01e9689b52c1761d80dcf60f
parent 1db5f9b50db3f74d677224592d9718c1cc6e119b
Author: Armin Preiml <apreiml@strohwolke.at>
Date: Thu, 7 Jul 2022 15:17:40 +0200
add crypto::hkdf
Signed-off-by: Armin Preiml <apreiml@strohwolke.at>
Diffstat:
5 files changed, 350 insertions(+), 0 deletions(-)
diff --git a/crypto/hkdf/+test.ha b/crypto/hkdf/+test.ha
@@ -0,0 +1,218 @@
+// License: MPL-2.0
+// (c) 2022 Armin Preiml <apreiml@strohwolke.at>
+use bytes;
+use crypto::sha1;
+use crypto::sha256;
+
+// test taken from RFC 5869
+@test fn rfc1() void = {
+ let h = sha256::sha256();
+ let dest: [42]u8 = [0...];
+
+ const key: [22]u8 = [0x0b...];
+ const salt: [13]u8 = [
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+ 0x0a, 0x0b, 0x0c,
+ ];
+ const info: [10]u8 = [
+ 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
+ ];
+
+ const expected: [42]u8 = [
+ 0x3c, 0xb2, 0x5f, 0x25, 0xfa, 0xac, 0xd5, 0x7a, 0x90, 0x43,
+ 0x4f, 0x64, 0xd0, 0x36, 0x2f, 0x2a, 0x2d, 0x2d, 0x0a, 0x90,
+ 0xcf, 0x1a, 0x5a, 0x4c, 0x5d, 0xb0, 0x2d, 0x56, 0xec, 0xc4,
+ 0xc5, 0xbf, 0x34, 0x00, 0x72, 0x08, 0xd5, 0xb8, 0x87, 0x18,
+ 0x58, 0x65,
+ ];
+
+ let buf: [sha256::SIZE + sha256::BLOCKSIZE]u8 = [0...];
+
+ hkdf(&h, dest[..], key, info, salt, buf);
+
+ assert(bytes::equal(expected, dest));
+};
+
+// test taken from RFC 5869
+@test fn rfc2() void = {
+ let h = sha256::sha256();
+ let dest: [82]u8 = [0...];
+
+ const key: [80]u8 = [
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+ 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
+ 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,
+ 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31,
+ 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
+ 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
+ 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+ ];
+ const salt: [80]u8 = [
+ 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
+ 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73,
+ 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d,
+ 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91,
+ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b,
+ 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5,
+ 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+ ];
+ const info: [80]u8 = [
+ 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9,
+ 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3,
+ 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd,
+ 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+ 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1,
+ 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb,
+ 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5,
+ 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+ ];
+
+ const expected: [82]u8 = [
+ 0xb1, 0x1e, 0x39, 0x8d, 0xc8, 0x03, 0x27, 0xa1, 0xc8, 0xe7,
+ 0xf7, 0x8c, 0x59, 0x6a, 0x49, 0x34, 0x4f, 0x01, 0x2e, 0xda,
+ 0x2d, 0x4e, 0xfa, 0xd8, 0xa0, 0x50, 0xcc, 0x4c, 0x19, 0xaf,
+ 0xa9, 0x7c, 0x59, 0x04, 0x5a, 0x99, 0xca, 0xc7, 0x82, 0x72,
+ 0x71, 0xcb, 0x41, 0xc6, 0x5e, 0x59, 0x0e, 0x09, 0xda, 0x32,
+ 0x75, 0x60, 0x0c, 0x2f, 0x09, 0xb8, 0x36, 0x77, 0x93, 0xa9,
+ 0xac, 0xa3, 0xdb, 0x71, 0xcc, 0x30, 0xc5, 0x81, 0x79, 0xec,
+ 0x3e, 0x87, 0xc1, 0x4c, 0x01, 0xd5, 0xc1, 0xf3, 0x43, 0x4f,
+ 0x1d, 0x87,
+ ];
+
+ let buf: [sha256::SIZE + sha256::BLOCKSIZE]u8 = [0...];
+
+ hkdf(&h, dest[..], key, info, salt, buf);
+
+ assert(bytes::equal(expected, dest));
+};
+
+// test taken from RFC 5869
+@test fn rfc3() void = {
+ let h = sha256::sha256();
+ let dest: [42]u8 = [0...];
+
+ const key: [22]u8 = [0x0b...];
+
+ const expected: [42]u8 = [
+ 0x8d, 0xa4, 0xe7, 0x75, 0xa5, 0x63, 0xc1, 0x8f, 0x71, 0x5f,
+ 0x80, 0x2a, 0x06, 0x3c, 0x5a, 0x31, 0xb8, 0xa1, 0x1f, 0x5c,
+ 0x5e, 0xe1, 0x87, 0x9e, 0xc3, 0x45, 0x4e, 0x5f, 0x3c, 0x73,
+ 0x8d, 0x2d, 0x9d, 0x20, 0x13, 0x95, 0xfa, 0xa4, 0xb6, 0x1a,
+ 0x96, 0xc8,
+ ];
+
+ let buf: [sha256::SIZE + sha256::BLOCKSIZE]u8 = [0...];
+
+ hkdf(&h, dest[..], key, [], [], buf);
+
+ assert(bytes::equal(expected, dest));
+};
+
+
+// test taken from RFC 5869
+@test fn rfc4() void = {
+ let h = sha1::sha1();
+ let dest: [42]u8 = [0...];
+
+ const key: [11]u8 = [0x0b...];
+ const salt: [13]u8 = [
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+ 0x0a, 0x0b, 0x0c,
+ ];
+ const info: [10]u8 = [
+ 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9,
+ ];
+
+ const expected: [42]u8 = [
+ 0x08, 0x5a, 0x01, 0xea, 0x1b, 0x10, 0xf3, 0x69, 0x33, 0x06,
+ 0x8b, 0x56, 0xef, 0xa5, 0xad, 0x81, 0xa4, 0xf1, 0x4b, 0x82,
+ 0x2f, 0x5b, 0x09, 0x15, 0x68, 0xa9, 0xcd, 0xd4, 0xf1, 0x55,
+ 0xfd, 0xa2, 0xc2, 0x2e, 0x42, 0x24, 0x78, 0xd3, 0x05, 0xf3,
+ 0xf8, 0x96,
+ ];
+
+ let buf: [sha1::SIZE + sha1::BLOCKSIZE]u8 = [0...];
+
+ hkdf(&h, dest[..], key, info, salt, buf);
+
+ assert(bytes::equal(expected, dest));
+};
+
+// test taken from RFC 5869
+@test fn rfc5() void = {
+ let h = sha1::sha1();
+ let dest: [82]u8 = [0...];
+
+ const key: [80]u8 = [
+ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
+ 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10, 0x11, 0x12, 0x13,
+ 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d,
+ 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31,
+ 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
+ 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44, 0x45,
+ 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+ ];
+ const salt: [80]u8 = [
+ 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
+ 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73,
+ 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d,
+ 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91,
+ 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b,
+ 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5,
+ 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+ ];
+ const info: [80]u8 = [
+ 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9,
+ 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3,
+ 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd,
+ 0xce, 0xcf, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+ 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe1,
+ 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb,
+ 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5,
+ 0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
+ ];
+
+ const expected: [82]u8 = [
+ 0x0b, 0xd7, 0x70, 0xa7, 0x4d, 0x11, 0x60, 0xf7, 0xc9, 0xf1,
+ 0x2c, 0xd5, 0x91, 0x2a, 0x06, 0xeb, 0xff, 0x6a, 0xdc, 0xae,
+ 0x89, 0x9d, 0x92, 0x19, 0x1f, 0xe4, 0x30, 0x56, 0x73, 0xba,
+ 0x2f, 0xfe, 0x8f, 0xa3, 0xf1, 0xa4, 0xe5, 0xad, 0x79, 0xf3,
+ 0xf3, 0x34, 0xb3, 0xb2, 0x02, 0xb2, 0x17, 0x3c, 0x48, 0x6e,
+ 0xa3, 0x7c, 0xe3, 0xd3, 0x97, 0xed, 0x03, 0x4c, 0x7f, 0x9d,
+ 0xfe, 0xb1, 0x5c, 0x5e, 0x92, 0x73, 0x36, 0xd0, 0x44, 0x1f,
+ 0x4c, 0x43, 0x00, 0xe2, 0xcf, 0xf0, 0xd0, 0x90, 0x0b, 0x52,
+ 0xd3, 0xb4,
+ ];
+
+ let buf: [sha1::SIZE + sha1::BLOCKSIZE]u8 = [0...];
+
+ hkdf(&h, dest[..], key, info, salt, buf);
+
+ assert(bytes::equal(expected, dest));
+};
+
+// test taken from RFC 5869
+@test fn rfc6() void = {
+ let h = sha1::sha1();
+ let dest: [42]u8 = [0...];
+
+ const key: [22]u8 = [0x0c...];
+
+ const expected: [42]u8 = [
+ 0x2c, 0x91, 0x11, 0x72, 0x04, 0xd7, 0x45, 0xf3, 0x50, 0x0d,
+ 0x63, 0x6a, 0x62, 0xf6, 0x4f, 0x0a, 0xb3, 0xba, 0xe5, 0x48,
+ 0xaa, 0x53, 0xd4, 0x23, 0xb0, 0xd1, 0xf2, 0x7e, 0xbb, 0xa6,
+ 0xf5, 0xe5, 0x67, 0x3a, 0x08, 0x1d, 0x70, 0xcc, 0xe7, 0xac,
+ 0xfc, 0x48,
+ ];
+
+ let buf: [sha1::SIZE + sha1::BLOCKSIZE]u8 = [0...];
+
+ hkdf(&h, dest[..], key, [], void, buf);
+
+ assert(bytes::equal(expected, dest));
+};
diff --git a/crypto/hkdf/README b/crypto/hkdf/README
@@ -0,0 +1 @@
+This module provides a HKDF implementation according to RFC 5869.
diff --git a/crypto/hkdf/hkdf.ha b/crypto/hkdf/hkdf.ha
@@ -0,0 +1,85 @@
+// License: MPL-2.0
+// (c) 2022 Armin Preiml <apreiml@strohwolke.at>
+use bytes;
+use crypto::hmac;
+use crypto::mac;
+use hash;
+
+// Derives a new key from specified 'key' material using HMAC with 'h' as
+// underlying hash function and writes it to 'dest'. The resulting key size is
+// of the size of 'dest'.
+//
+// 'info' binds the resulting key to the context in where it is being used and
+// therefore prevents the derivation of the same key for different contexts. It
+// should be independent of the input key. 'salt' does not need to be secret and
+// it's recommended to use a random or pseudo random value, ideally of the hash
+// size of the given hash function. The 'salt' must be a fixed value or void
+// between many different contexts.
+//
+// 'buf' must be of the size [[hash::bsz]] + [[hash::sz]] of given hash 'h'.
+//
+// See the RFC 5869 for detailed usage guidance.
+export fn hkdf(
+ h: *hash::hash,
+ dest: []u8,
+ key: []u8,
+ info: []u8,
+ salt: ([]u8 | void),
+ buf: []u8,
+) void = {
+ const hashsz = hash::sz(h);
+ assert(len(buf) >= (hash::sz(h) + hash::bsz(h)),
+ "len(buf) must be at least `hash::sz(h) + hash::bsz(h)`");
+
+ let prk = buf[..hashsz];
+ let buf = buf[hashsz..];
+
+ let prkkey = match(salt) {
+ case let s: []u8 =>
+ yield s;
+ case void =>
+ // use prk for an hashsz full of zeros
+ bytes::zero(prk);
+ yield prk;
+ };
+
+ let hm = hmac::hmac(h, prkkey, buf);
+
+ mac::write(&hm, key);
+ mac::sum(&hm, prk);
+ mac::finish(&hm);
+
+ let ctr: [1]u8 = [0];
+ let preblock: []u8 = [];
+
+ for (let i = 0u8; len(dest) > 0; i += 1) {
+ hash::reset(h);
+ hm = hmac::hmac(h, prk, buf);
+ defer mac::finish(&hm);
+
+ if (i > 0) {
+ mac::write(&hm, preblock);
+ };
+ mac::write(&hm, info);
+
+ ctr[0] = i + 1;
+ mac::write(&hm, ctr);
+
+ const n = if (len(dest) >= hashsz) {
+ mac::sum(&hm, dest[..hashsz]);
+ preblock = dest[..hashsz];
+ yield hashsz;
+ } else {
+ // use the prk as buffer for the last block as it's
+ // not needed anymore afterwards.
+ mac::sum(&hm, prk);
+ dest[..] = prk[..len(dest)];
+ yield len(dest);
+ };
+
+ dest = dest[n..];
+ };
+
+ bytes::zero(prk);
+ bytes::zero(buf);
+};
diff --git a/scripts/gen-stdlib b/scripts/gen-stdlib
@@ -344,6 +344,18 @@ crypto_cipher() {
gen_ssa crypto::cipher crypto::math bytes endian errors io types
}
+crypto_hkdf() {
+ if [ $testing -eq 0 ]
+ then
+ gen_srcs crypto::hkdf hkdf.ha
+ gen_ssa crypto::hkdf bytes crypto::hmac crypto::mac hash
+ else
+ gen_srcs crypto::hkdf hkdf.ha +test.ha
+ gen_ssa crypto::hkdf bytes crypto::hmac crypto::mac hash \
+ crypto::sha1 crypto::sha256
+ fi
+}
+
crypto_hmac() {
if [ $testing -eq 0 ]
then
@@ -1415,6 +1427,7 @@ crypto::blake2b
crypto::blowfish
crypto::chacha
crypto::cipher
+crypto::hkdf
crypto::hmac
crypto::mac
crypto::math
diff --git a/stdlib.mk b/stdlib.mk
@@ -202,6 +202,12 @@ stdlib_deps_any += $(stdlib_crypto_cipher_any)
stdlib_crypto_cipher_linux = $(stdlib_crypto_cipher_any)
stdlib_crypto_cipher_freebsd = $(stdlib_crypto_cipher_any)
+# gen_lib crypto::hkdf (any)
+stdlib_crypto_hkdf_any = $(HARECACHE)/crypto/hkdf/crypto_hkdf-any.o
+stdlib_deps_any += $(stdlib_crypto_hkdf_any)
+stdlib_crypto_hkdf_linux = $(stdlib_crypto_hkdf_any)
+stdlib_crypto_hkdf_freebsd = $(stdlib_crypto_hkdf_any)
+
# gen_lib crypto::hmac (any)
stdlib_crypto_hmac_any = $(HARECACHE)/crypto/hmac/crypto_hmac-any.o
stdlib_deps_any += $(stdlib_crypto_hmac_any)
@@ -868,6 +874,16 @@ $(HARECACHE)/crypto/cipher/crypto_cipher-any.ssa: $(stdlib_crypto_cipher_any_src
@HARECACHE=$(HARECACHE) $(HAREC) $(HAREFLAGS) -o $@ -Ncrypto::cipher \
-t$(HARECACHE)/crypto/cipher/crypto_cipher.td $(stdlib_crypto_cipher_any_srcs)
+# crypto::hkdf (+any)
+stdlib_crypto_hkdf_any_srcs = \
+ $(STDLIB)/crypto/hkdf/hkdf.ha
+
+$(HARECACHE)/crypto/hkdf/crypto_hkdf-any.ssa: $(stdlib_crypto_hkdf_any_srcs) $(stdlib_rt) $(stdlib_bytes_$(PLATFORM)) $(stdlib_crypto_hmac_$(PLATFORM)) $(stdlib_crypto_mac_$(PLATFORM)) $(stdlib_hash_$(PLATFORM))
+ @printf 'HAREC \t$@\n'
+ @mkdir -p $(HARECACHE)/crypto/hkdf
+ @HARECACHE=$(HARECACHE) $(HAREC) $(HAREFLAGS) -o $@ -Ncrypto::hkdf \
+ -t$(HARECACHE)/crypto/hkdf/crypto_hkdf.td $(stdlib_crypto_hkdf_any_srcs)
+
# crypto::hmac (+any)
stdlib_crypto_hmac_any_srcs = \
$(STDLIB)/crypto/hmac/hmac.ha \
@@ -2338,6 +2354,12 @@ testlib_deps_any += $(testlib_crypto_cipher_any)
testlib_crypto_cipher_linux = $(testlib_crypto_cipher_any)
testlib_crypto_cipher_freebsd = $(testlib_crypto_cipher_any)
+# gen_lib crypto::hkdf (any)
+testlib_crypto_hkdf_any = $(TESTCACHE)/crypto/hkdf/crypto_hkdf-any.o
+testlib_deps_any += $(testlib_crypto_hkdf_any)
+testlib_crypto_hkdf_linux = $(testlib_crypto_hkdf_any)
+testlib_crypto_hkdf_freebsd = $(testlib_crypto_hkdf_any)
+
# gen_lib crypto::hmac (any)
testlib_crypto_hmac_any = $(TESTCACHE)/crypto/hmac/crypto_hmac-any.o
testlib_deps_any += $(testlib_crypto_hmac_any)
@@ -3016,6 +3038,17 @@ $(TESTCACHE)/crypto/cipher/crypto_cipher-any.ssa: $(testlib_crypto_cipher_any_sr
@HARECACHE=$(TESTCACHE) $(HAREC) $(TESTHAREFLAGS) -o $@ -Ncrypto::cipher \
-t$(TESTCACHE)/crypto/cipher/crypto_cipher.td $(testlib_crypto_cipher_any_srcs)
+# crypto::hkdf (+any)
+testlib_crypto_hkdf_any_srcs = \
+ $(STDLIB)/crypto/hkdf/hkdf.ha \
+ $(STDLIB)/crypto/hkdf/+test.ha
+
+$(TESTCACHE)/crypto/hkdf/crypto_hkdf-any.ssa: $(testlib_crypto_hkdf_any_srcs) $(testlib_rt) $(testlib_bytes_$(PLATFORM)) $(testlib_crypto_hmac_$(PLATFORM)) $(testlib_crypto_mac_$(PLATFORM)) $(testlib_hash_$(PLATFORM)) $(testlib_crypto_sha1_$(PLATFORM)) $(testlib_crypto_sha256_$(PLATFORM))
+ @printf 'HAREC \t$@\n'
+ @mkdir -p $(TESTCACHE)/crypto/hkdf
+ @HARECACHE=$(TESTCACHE) $(HAREC) $(TESTHAREFLAGS) -o $@ -Ncrypto::hkdf \
+ -t$(TESTCACHE)/crypto/hkdf/crypto_hkdf.td $(testlib_crypto_hkdf_any_srcs)
+
# crypto::hmac (+any)
testlib_crypto_hmac_any_srcs = \
$(STDLIB)/crypto/hmac/hmac.ha \
