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Don't use sprintf for SHA1 to hex conversion

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This commit is contained in:
Julian Brost 2021-03-10 14:41:06 +01:00
parent 49cfda833e
commit 2a2229a49b
1 changed files with 6 additions and 2 deletions
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8
lib/base/tlsutility.cpp
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@ -762,9 +762,13 @@ String SHA1(const String& s, bool binary)
if (binary)
return String(reinterpret_cast<const char*>(digest), reinterpret_cast<const char *>(digest + SHA_DIGEST_LENGTH));
static const char hexdigits[] = "0123456789abcdef";
char output[SHA_DIGEST_LENGTH*2+1];
for (int i = 0; i < 20; i++)
sprintf(output + 2 * i, "%02x", digest[i]);
for (int i = 0; i < SHA_DIGEST_LENGTH; i++) {
output[2*i] = hexdigits[digest[i] >> 4];
output[2*i + 1] = hexdigits[digest[i] & 0xf];
}
output[2*SHA_DIGEST_LENGTH] = 0;
return output;
}