string MD5::encryptionWithMD5(string srcString)
{
//每次开始之前都需要将state和count状态“清零”
count[0] = count[1] = 0;
state[0] = 0x67452301;
state[1] = 0xefcdab89;
state[2] = 0x98badcfe;
state[3] = 0x10325476;
appending((const uint8_t*)srcString.c_str(), srcString.length());
uint8_t bits[8];
uint32_t index, padLen;
//以bit的形式记录字符串长度，用以append到最后
encode(count, bits, 8);
//先append 0b10000000的padding
index = (uint32_t)((count[0] / 8) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
appending(PADDING, padLen);
//再append比特流长度bits
appending(bits, 8);
//把结果由word转换成byte
encode(state, result, 16);
//最后把两个char转换成可读的表示十六进制的string
uint8_t *byteResult = result;
string str;
str.reserve(16 << 1);
for (size_t i = 0; i < 16; ++i) {
int t = byteResult[i];
int a = t / 16; //a表示十位数
int b = t % 16; //b表示个位数
str.append(1, HEX[a]);
str.append(1, HEX[b]);
}
return str;
}
/*
* Rewrap the given section of string, putting the result in aOutString.
*/
nsresult
nsWrapUtils::Rewrap(const nsAString& aInString,
PRUint32 aWrapCol, PRUint32 aFirstLineOffset,
PRBool aRespectNewlines,
const nsAString &aLineStartStr,
nsAString& aOutString)
{
PRInt32 i;
nsresult rv;
nsCOMPtr<nsILineBreaker> lineBreaker = do_GetService(NS_LBRK_CONTRACTID, &rv);
aOutString.Truncate();
// Now we either have a line breaker, or we don't.
const nsPromiseFlatString &tString = PromiseFlatString(aInString);
PRInt32 length = tString.Length();
const PRUnichar* unicodeStr = tString.get();
for (i = 0; i < length; ) // loop over lines
{
nsAutoString remaining(unicodeStr + i, length - i);
// If there's a first-line offset, that means we're not starting
// at the beginning of the line, so don't add a cite string there:
if (!aFirstLineOffset)
aOutString.Append(aLineStartStr);
PRInt32 eol = i + aWrapCol - aFirstLineOffset;
if (eol > length)
{
aOutString.Append(unicodeStr + i, length - i);
aOutString.Append(PRUnichar('\n')); // DOM line breaks, not NS_LINEBREAK
break;
}
if (i > 0) aFirstLineOffset = 0;
// eol is the prospective end of line ...
// look backwards from there for a place to break.
PRInt32 breakPt;
rv = NS_ERROR_BASE;
if (lineBreaker)
{
breakPt = lineBreaker->Prev(unicodeStr + i, length - i, eol - i);
if (breakPt == NS_LINEBREAKER_NEED_MORE_TEXT)
{
breakPt = lineBreaker->Next(unicodeStr + i, length - i, eol - i);
if (breakPt == NS_LINEBREAKER_NEED_MORE_TEXT) rv = NS_ERROR_BASE;
else rv = NS_OK;
}
else rv = NS_OK;
}
// If we get out here and rv is set, something went wrong with line breaker.
// Just break the line, hard.
// If rv is okay, then breakPt is the place to break.
if (NS_FAILED(rv))
{
#ifdef DEBUG_akkana
printf("nsILineBreaker not working -- breaking hard\n");
#endif
breakPt = eol+1;
}
else breakPt += i;
nsAutoString appending(unicodeStr + i, breakPt - i);
aOutString.Append(unicodeStr + i, breakPt - i);
aOutString.Append(PRUnichar('\n')); // DOM line breaks, not NS_LINEBREAK
i = breakPt;
} // continue looping over lines
return NS_OK;
}
