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crypt32: Partially implement CryptBinaryToStringW.

This commit is contained in:
Juan Lang 2009-10-29 15:13:29 -07:00 committed by Alexandre Julliard
parent 50bc161eb2
commit 2d5ac92d9a
2 changed files with 195 additions and 1 deletions
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194
dlls/crypt32/base64.c
View File

@ -60,6 +60,8 @@ static const char b64[] =
typedef BOOL (*BinaryToStringAFunc)(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString);
typedef BOOL (*BinaryToStringWFunc)(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString);
static BOOL EncodeBinaryToBinaryA(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPSTR pszString, DWORD *pcchString)
@ -280,6 +282,198 @@ BOOL WINAPI CryptBinaryToStringA(const BYTE *pbBinary,
return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
}
static LONG encodeBase64W(const BYTE *in_buf, int in_len, LPCWSTR sep,
WCHAR* out_buf, DWORD *out_len)
{
int div, i;
const BYTE *d = in_buf;
int bytes = (in_len*8 + 5)/6, pad_bytes = (bytes % 4) ? 4 - (bytes % 4) : 0;
DWORD needed;
LPWSTR ptr;
TRACE("bytes is %d, pad bytes is %d\n", bytes, pad_bytes);
needed = bytes + pad_bytes + 1;
needed += (needed / 64 + 1) * strlenW(sep);
if (needed > *out_len)
{
*out_len = needed;
return ERROR_INSUFFICIENT_BUFFER;
}
else
*out_len = needed;
/* Three bytes of input give 4 chars of output */
div = in_len / 3;
ptr = out_buf;
i = 0;
while (div > 0)
{
if (i && i % 64 == 0)
{
strcpyW(ptr, sep);
ptr += strlenW(sep);
}
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte and the first 2
* bits of the third byte */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) | (d[2] >> 6 & 0x03)];
/* fourth char is the remaining 6 bits of the third byte */
*ptr++ = b64[ d[2] & 0x3f];
i += 4;
d += 3;
div--;
}
switch(pad_bytes)
{
case 1:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte and the first 4
* bits of the second byte */
*ptr++ = b64[ ((d[0] << 4) & 0x30) | (d[1] >> 4 & 0x0f)];
/* third char is the last 4 bits of the second byte padded with
* two zeroes */
*ptr++ = b64[ ((d[1] << 2) & 0x3c) ];
/* fourth char is a = to indicate one byte of padding */
*ptr++ = '=';
break;
case 2:
/* first char is the first 6 bits of the first byte*/
*ptr++ = b64[ ( d[0] >> 2) & 0x3f ];
/* second char is the last 2 bits of the first byte padded with
* four zeroes*/
*ptr++ = b64[ ((d[0] << 4) & 0x30)];
/* third char is = to indicate padding */
*ptr++ = '=';
/* fourth char is = to indicate padding */
*ptr++ = '=';
break;
}
strcpyW(ptr, sep);
return ERROR_SUCCESS;
}
static BOOL BinaryToBase64W(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
{
static const WCHAR crlf[] = { '\r','\n',0 }, lf[] = { '\n',0 };
BOOL ret = TRUE;
LPCWSTR header = NULL, trailer = NULL, sep = NULL;
DWORD charsNeeded;
if (dwFlags & CRYPT_STRING_NOCR)
sep = lf;
else
sep = crlf;
switch (dwFlags & 0x7fffffff)
{
case CRYPT_STRING_BASE64:
/* no header or footer */
break;
case CRYPT_STRING_BASE64HEADER:
header = CERT_HEADER_W;
trailer = CERT_TRAILER_W;
break;
case CRYPT_STRING_BASE64REQUESTHEADER:
header = CERT_REQUEST_HEADER_W;
trailer = CERT_REQUEST_TRAILER_W;
break;
case CRYPT_STRING_BASE64X509CRLHEADER:
header = X509_HEADER_W;
trailer = X509_TRAILER_W;
break;
}
charsNeeded = 0;
encodeBase64W(pbBinary, cbBinary, sep, NULL, &charsNeeded);
charsNeeded += strlenW(sep);
if (header)
charsNeeded += strlenW(header) + strlenW(sep);
if (trailer)
charsNeeded += strlenW(trailer) + strlenW(sep);
if (charsNeeded <= *pcchString)
{
LPWSTR ptr = pszString;
DWORD size = charsNeeded;
if (header)
{
strcpyW(ptr, header);
ptr += strlenW(ptr);
strcpyW(ptr, sep);
ptr += strlenW(sep);
}
encodeBase64W(pbBinary, cbBinary, sep, ptr, &size);
ptr += size - 1;
if (trailer)
{
strcpyW(ptr, trailer);
ptr += strlenW(ptr);
strcpyW(ptr, sep);
ptr += strlenW(sep);
}
*pcchString = charsNeeded - 1;
}
else if (pszString)
{
*pcchString = charsNeeded;
SetLastError(ERROR_INSUFFICIENT_BUFFER);
ret = FALSE;
}
else
*pcchString = charsNeeded;
return ret;
}
BOOL WINAPI CryptBinaryToStringW(const BYTE *pbBinary,
DWORD cbBinary, DWORD dwFlags, LPWSTR pszString, DWORD *pcchString)
{
BinaryToStringWFunc encoder = NULL;
TRACE("(%p, %d, %08x, %p, %p)\n", pbBinary, cbBinary, dwFlags, pszString,
pcchString);
if (!pbBinary)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
if (!pcchString)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
switch (dwFlags & 0x7fffffff)
{
case CRYPT_STRING_BASE64:
case CRYPT_STRING_BASE64HEADER:
case CRYPT_STRING_BASE64REQUESTHEADER:
case CRYPT_STRING_BASE64X509CRLHEADER:
encoder = BinaryToBase64W;
break;
case CRYPT_STRING_BINARY:
case CRYPT_STRING_HEX:
case CRYPT_STRING_HEXASCII:
case CRYPT_STRING_HEXADDR:
case CRYPT_STRING_HEXASCIIADDR:
FIXME("Unimplemented type %d\n", dwFlags & 0x7fffffff);
/* fall through */
default:
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
return encoder(pbBinary, cbBinary, dwFlags, pszString, pcchString);
}
static inline BYTE decodeBase64Byte(int c)
{
BYTE ret;

2
dlls/crypt32/crypt32.spec
View File

@ -98,7 +98,7 @@
@ stdcall CertVerifyValidityNesting(ptr ptr)
@ stdcall CreateFileU(wstr long long ptr long long ptr) kernel32.CreateFileW
@ stdcall CryptBinaryToStringA(ptr long long ptr ptr)
@ stub CryptBinaryToStringW # (ptr long long ptr ptr)
@ stdcall CryptBinaryToStringW(ptr long long ptr ptr)
@ stdcall CryptStringToBinaryA(str long long ptr ptr ptr ptr)
@ stdcall CryptStringToBinaryW (wstr long long ptr ptr ptr ptr)
@ stdcall CryptAcquireContextU(ptr wstr wstr long long) advapi32.CryptAcquireContextW