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libent: use BCryptGenRandom on Windows

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This commit is contained in:
~locpyl-tidnyd 2021-03-27 20:15:56 +00:00
parent 6ed4b7077b
commit ad81a017c5
2 changed files with 12 additions and 1 deletions
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1
pkg/ent/configure vendored
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@ -7,6 +7,7 @@ log () {
for impl in ENT_GETENTROPY_UNISTD \
ENT_GETENTROPY_SYSRANDOM \
ENT_GETRANDOM_SYSCALL \
ENT_GETENTROPY_BCRYPTGENRANDOM \
ENT_DEV_URANDOM
do
export IMPL=$impl

12
pkg/ent/ent.c
View File

@ -57,6 +57,16 @@ int ent_getentropy(void* buf, size_t len) {
return 0;
}
// Use `BCryptGenRandom` on Windows ////////////////////////////////////////////
#elif defined(ENT_GETENTROPY_BCRYPTGENRANDOM)
#include <windows.h>
#include <bcrypt.h>
int ent_getentropy(void* buf, size_t len) {
return BCryptGenRandom(NULL, (PUCHAR)buf, len, BCRYPT_USE_SYSTEM_PREFERRED_RNG);
}
#else
#error "One of these must be set: ENT_DEV_URANDOM, ENT_GETENTROPY_UNISTD, ENT_GETENTROPY_SYSRANDOM, ENT_GETRANDOM_SYSCALL"
#error "One of these must be set: ENT_GETENTROPY_BCRYPTGENRANDOM, ENT_DEV_URANDOM, ENT_GETENTROPY_UNISTD, ENT_GETENTROPY_SYSRANDOM, ENT_GETRANDOM_SYSCALL"
#endif