diff options
Diffstat (limited to 'crypto/random-platform.c')
| -rw-r--r-- | crypto/random-platform.c | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/crypto/random-platform.c b/crypto/random-platform.c index 82b755afad..0eddb915b7 100644 --- a/crypto/random-platform.c +++ b/crypto/random-platform.c @@ -22,14 +22,16 @@ #include "crypto/random.h" -int qcrypto_random_bytes(uint8_t *buf G_GNUC_UNUSED, - size_t buflen G_GNUC_UNUSED, - Error **errp) -{ - int fd; - int ret = -1; - int got; +#ifdef _WIN32 +#include <Wincrypt.h> +static HCRYPTPROV hCryptProv; +#else +static int fd; /* a file handle to either /dev/urandom or /dev/random */ +#endif +int qcrypto_random_init(Error **errp) +{ +#ifndef _WIN32 /* TBD perhaps also add support for BSD getentropy / Linux * getrandom syscalls directly */ fd = open("/dev/urandom", O_RDONLY); @@ -41,6 +43,25 @@ int qcrypto_random_bytes(uint8_t *buf G_GNUC_UNUSED, error_setg(errp, "No /dev/urandom or /dev/random found"); return -1; } +#else + if (!CryptAcquireContext(&hCryptProv, NULL, NULL, PROV_RSA_FULL, + CRYPT_SILENT | CRYPT_VERIFYCONTEXT)) { + error_setg_win32(errp, GetLastError(), + "Unable to create cryptographic provider"); + return -1; + } +#endif + + return 0; +} + +int qcrypto_random_bytes(uint8_t *buf G_GNUC_UNUSED, + size_t buflen G_GNUC_UNUSED, + Error **errp) +{ +#ifndef _WIN32 + int ret = -1; + int got; while (buflen > 0) { got = read(fd, buf, buflen); @@ -59,6 +80,14 @@ int qcrypto_random_bytes(uint8_t *buf G_GNUC_UNUSED, ret = 0; cleanup: - close(fd); return ret; +#else + if (!CryptGenRandom(hCryptProv, buflen, buf)) { + error_setg_win32(errp, GetLastError(), + "Unable to read random bytes"); + return -1; + } + + return 0; +#endif } |