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5cb73a326f
The replacement, CCRandomGenerateBytes, is available in the C library. My computer was giving me an annoying and somewhat strange linker warning: ld: warning: text-based stub file /System/Library/Frameworks//Security.framework/Security.tbd and library file /System/Library/Frameworks//Security.framework/Security are out of sync. Falling back to library file for linking.
31 lines
675 B
C
31 lines
675 B
C
#include <fcntl.h>
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#include "kernel/calls.h"
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#ifdef __APPLE__
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#include <CommonCrypto/CommonCrypto.h>
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#include <CommonCrypto/CommonRandom.h>
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#else
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#include <unistd.h>
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#include <sys/syscall.h>
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#include <linux/random.h>
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#endif
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int get_random(char *buf, size_t len) {
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#ifdef __APPLE__
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return CCRandomGenerateBytes(buf, len) != kCCSuccess;
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#else
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return syscall(SYS_getrandom, buf, len, 0) < 0;
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#endif
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}
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dword_t sys_getrandom(addr_t buf_addr, dword_t len, dword_t flags) {
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if (len > 256)
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return _EIO;
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char buf[256];
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if (get_random(buf, len) != 0)
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return _EIO;
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if (user_write(buf_addr, buf, len))
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return _EFAULT;
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return len;
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}
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