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cmake: Only use OpenSSL Ed25519 implementation when possible

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It is possible for OpenSSL to have the type EVP_PKEY_ED25519 in
openssl/evp.h, but not the single shot functions EVP_DigestSign() and
EVP_DigestVerify() which are required to generate Ed25519 signatures.

Only switch to use OpenSSL Ed25519 implementation when OpenSSL have all
required types and functions.

Fixes: T197

Signed-off-by: Anderson Toshiyuki Sasaki <ansasaki@redhat.com>
Reviewed-by: Andreas Schneider <asn@cryptomilk.org>
(cherry picked from commit 21655e396c)
This commit is contained in:
Anderson Toshiyuki Sasaki
2019-11-05 16:17:22 +01:00
committed by Andreas Schneider
parent 8a6ddc0a48
commit 27096c3c0f
1 changed files with 6 additions and 1 deletions
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7
ConfigureChecks.cmake
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@@ -148,7 +148,12 @@ if (OPENSSL_FOUND)
set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})
check_symbol_exists(EVP_PKEY_ED25519 "openssl/evp.h" HAVE_OPENSSL_ED25519)
check_symbol_exists(EVP_PKEY_ED25519 "openssl/evp.h" FOUND_OPENSSL_ED25519)
if (HAVE_OPENSSL_EVP_DIGESTSIGN AND HAVE_OPENSSL_EVP_DIGESTVERIFY AND
FOUND_OPENSSL_ED25519)
set(HAVE_OPENSSL_ED25519 1)
endif()
set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_CRYPTO_LIBRARY})