mirror of https://github.com/oxen-io/lokinet
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/* [Rtl]SecureZeroMemory is an inline procedure in the windows headers */
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include <sodium/utils.h>
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void
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sodium_memzero(void *const pnt, const size_t len)
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{
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#ifdef _WIN32
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SecureZeroMemory(pnt, len);
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#elif defined(HAVE_EXPLICIT_BZERO)
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explicit_bzero(pnt, len);
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#else
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volatile unsigned char *volatile pnt_ = (volatile unsigned char *volatile)pnt;
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size_t i = (size_t)0U;
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while(i < len)
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{
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pnt_[i++] = 0U;
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}
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#endif
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}
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int
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sodium_is_zero(const unsigned char *n, const size_t nlen)
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{
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size_t i;
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volatile unsigned char d = 0U;
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for(i = 0U; i < nlen; i++)
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{
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d |= n[i];
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}
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return 1 & ((d - 1) >> 8);
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}
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int
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sodium_memcmp(const void *const b1_, const void *const b2_, size_t len)
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{
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const volatile unsigned char *volatile b1 =
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(const volatile unsigned char *volatile)b1_;
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const volatile unsigned char *volatile b2 =
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(const volatile unsigned char *volatile)b2_;
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size_t i;
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volatile unsigned char d = 0U;
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for(i = 0U; i < len; i++)
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{
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d |= b1[i] ^ b2[i];
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}
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return (1 & ((d - 1) >> 8)) - 1;
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}
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