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Merge pull request #5972 from SparkiDev/sp_int_8bit_to_bin_len

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SP int: fix 8-bit words and to binary length
This commit is contained in:
David Garske
2023-01-13 16:55:53 -08:00
committed by GitHub
parent 46ace19111 658d647339
commit 2d8c19ac42
1 changed files with 16 additions and 0 deletions
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16
wolfcrypt/src/sp_int.c
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@@ -16868,6 +16868,7 @@ int sp_to_unsigned_bin_len(const sp_int* a, byte* out, int outSz)
err = MP_VAL; err = MP_VAL;
} }
#if SP_WORD_SIZE > 8
if (err == MP_OKAY) { if (err == MP_OKAY) {
/* Start at the end of the buffer - least significant byte. */ /* Start at the end of the buffer - least significant byte. */
int j = outSz - 1; int j = outSz - 1;
@@ -16898,6 +16899,21 @@ int sp_to_unsigned_bin_len(const sp_int* a, byte* out, int outSz)
out[j] = 0; out[j] = 0;
} }
} }
#else
if ((err == MP_OKAY) && (outSz < a->used)) {
err = BUFFER_E;
}
if (err == MP_OKAY) {
int i;
int j;
XMEMSET(out, 0, outSz - a->used);
for (i = 0, j = outSz - 1; i < a->used; i++, j--) {
out[j] = a->dp[i];
}
}
#endif
return err; return err;
} }