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crypto: use /dev/[u]random as a final fallback random source

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If neither gcrypt or gnutls are available to provide a
cryptographic random number generator, fallback to consuming
bytes directly from /dev/[u]random.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-07-21 10:37:14 +01:00
parent e66b05e9ca
commit f3c8355c7a
2 changed files with 36 additions and 3 deletions
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2
crypto/Makefile.objs
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@ -12,6 +12,7 @@ crypto-obj-y += tlssession.o
crypto-obj-y += secret.o
crypto-obj-$(CONFIG_GCRYPT) += random-gcrypt.o
crypto-obj-$(if $(CONFIG_GCRYPT),n,$(CONFIG_GNUTLS_RND)) += random-gnutls.o
crypto-obj-$(if $(CONFIG_GCRYPT),n,$(if $(CONFIG_GNUTLS_RND),n,y)) += random-platform.o
crypto-obj-y += pbkdf.o
crypto-obj-$(CONFIG_NETTLE_KDF) += pbkdf-nettle.o
crypto-obj-$(if $(CONFIG_NETTLE_KDF),n,$(CONFIG_GCRYPT_KDF)) += pbkdf-gcrypt.o
@ -28,6 +29,5 @@ crypto-obj-y += block-luks.o
# Let the userspace emulators avoid linking gnutls/etc
crypto-aes-obj-y = aes.o
stub-obj-y += random-stub.o
stub-obj-y += pbkdf-stub.o
stub-obj-y += hash-stub.o