path: root/crypto/Makefile
diff options
authorStephan Müller <>2021-11-19 07:55:58 +0100
committerHerbert Xu <>2021-11-26 16:25:17 +1100
commit026a733e66592e743a0905c7fd6b5d3bf89b2d7e (patch)
tree017fa67b601ebc24efc2c9bd8ccf4b6d074d2747 /crypto/Makefile
parentb808f32023dd8127b0fa27f60fa69a959fd70388 (diff)
crypto: kdf - add SP800-108 counter key derivation function
SP800-108 defines three KDFs - this patch provides the counter KDF implementation. The KDF is implemented as a service function where the caller has to maintain the hash / HMAC state. Apart from this hash/HMAC state, no additional state is required to be maintained by either the caller or the KDF implementation. The key for the KDF is set with the crypto_kdf108_setkey function which is intended to be invoked before the caller requests a key derivation operation via crypto_kdf108_ctr_generate. SP800-108 allows the use of either a HMAC or a hash as crypto primitive for the KDF. When a HMAC primtive is intended to be used, crypto_kdf108_setkey must be used to set the HMAC key. Otherwise, for a hash crypto primitve crypto_kdf108_ctr_generate can be used immediately after allocating the hash handle. Signed-off-by: Stephan Mueller <> Signed-off-by: Herbert Xu <>
Diffstat (limited to 'crypto/Makefile')
1 files changed, 5 insertions, 0 deletions
diff --git a/crypto/Makefile b/crypto/Makefile
index 429c4d57458c..d76bff8d0ffd 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -200,3 +200,8 @@ obj-$(CONFIG_ASYMMETRIC_KEY_TYPE) += asymmetric_keys/
obj-$(CONFIG_CRYPTO_HASH_INFO) += hash_info.o
crypto_simd-y := simd.o
obj-$(CONFIG_CRYPTO_SIMD) += crypto_simd.o
+# Key derivation function
+obj-$(CONFIG_CRYPTO_KDF800108_CTR) += kdf_sp800108.o