linux/crypto/asymmetric_keys/Kconfig
David Howells dbed714163 KEYS: The RSA public key algorithm needs to select MPILIB
The RSA public key algorithm needs to select MPILIB directly in Kconfig as the
'select' directive is not recursive and is thus MPILIB is not enabled by
selecting MPILIB_EXTRA.

Without this, the following errors can occur:

	crypto/built-in.o: In function `RSA_verify_signature':
	rsa.c:(.text+0x1d347): undefined reference to `mpi_get_nbits'
	rsa.c:(.text+0x1d354): undefined reference to `mpi_get_nbits'
	rsa.c:(.text+0x1d36e): undefined reference to `mpi_cmp_ui'
	rsa.c:(.text+0x1d382): undefined reference to `mpi_cmp'
	rsa.c:(.text+0x1d391): undefined reference to `mpi_alloc'
	rsa.c:(.text+0x1d3b0): undefined reference to `mpi_powm'
	rsa.c:(.text+0x1d3c3): undefined reference to `mpi_free'
	rsa.c:(.text+0x1d3d8): undefined reference to `mpi_get_buffer'
	rsa.c:(.text+0x1d4d4): undefined reference to `mpi_free'
	rsa.c:(.text+0x1d503): undefined reference to `mpi_get_nbits'

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
2013-11-01 15:24:51 +00:00

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menuconfig ASYMMETRIC_KEY_TYPE
tristate "Asymmetric (public-key cryptographic) key type"
depends on KEYS
help
This option provides support for a key type that holds the data for
the asymmetric keys used for public key cryptographic operations such
as encryption, decryption, signature generation and signature
verification.
if ASYMMETRIC_KEY_TYPE
config ASYMMETRIC_PUBLIC_KEY_SUBTYPE
tristate "Asymmetric public-key crypto algorithm subtype"
select MPILIB
select PUBLIC_KEY_ALGO_RSA
select CRYPTO_HASH_INFO
help
This option provides support for asymmetric public key type handling.
If signature generation and/or verification are to be used,
appropriate hash algorithms (such as SHA-1) must be available.
ENOPKG will be reported if the requisite algorithm is unavailable.
config PUBLIC_KEY_ALGO_RSA
tristate "RSA public-key algorithm"
select MPILIB_EXTRA
select MPILIB
help
This option enables support for the RSA algorithm (PKCS#1, RFC3447).
config X509_CERTIFICATE_PARSER
tristate "X.509 certificate parser"
depends on ASYMMETRIC_PUBLIC_KEY_SUBTYPE
select ASN1
select OID_REGISTRY
help
This option procides support for parsing X.509 format blobs for key
data and provides the ability to instantiate a crypto key from a
public key packet found inside the certificate.
endif # ASYMMETRIC_KEY_TYPE