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gecko/security/nss/lib/util/nssb64d.c
Kai Engert afdeb339c5 Bug 461082, Deliver NSS 3.12.2 and NSPR 4.7.2 to Mozilla 
r=wtc
2008-10-23 02:38:29 +02:00

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1994-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* Base64 decoding (ascii to binary).
*
* $Id: nssb64d.c,v 1.7 2008/10/05 20:59:26 nelson%bolyard.com Exp $
*/
#include "nssb64.h"
#include "nspr.h"
#include "secitem.h"
#include "secerr.h"
/*
* XXX We want this basic support to go into NSPR (the PL part).
* Until that can happen, the PL interface is going to be kept entirely
* internal here -- all static functions and opaque data structures.
* When someone can get it moved over into NSPR, that should be done:
* - giving everything names that are accepted by the NSPR module owners
* (though I tried to choose ones that would work without modification)
* - exporting the functions (remove static declarations and add
* to nssutil.def as necessary)
* - put prototypes into appropriate header file (probably replacing
* the entire current lib/libc/include/plbase64.h in NSPR)
* along with a typedef for the context structure (which should be
* kept opaque -- definition in the source file only, but typedef
* ala "typedef struct PLBase64FooStr PLBase64Foo;" in header file)
* - modify anything else as necessary to conform to NSPR required style
* (I looked but found no formatting guide to follow)
*
* You will want to move over everything from here down to the comment
* which says "XXX End of base64 decoding code to be moved into NSPR",
* into a new file in NSPR.
*/
/*
**************************************************************
* XXX Beginning of base64 decoding code to be moved into NSPR.
*/
/*
* This typedef would belong in the NSPR header file (i.e. plbase64.h).
*/
typedef struct PLBase64DecoderStr PLBase64Decoder;
/*
* The following implementation of base64 decoding was based on code
* found in libmime (specifically, in mimeenc.c). It has been adapted to
* use PR types and naming as well as to provide other necessary semantics
* (like buffer-in/buffer-out in addition to "streaming" without undue
* performance hit of extra copying if you made the buffer versions
* use the output_fn). It also incorporates some aspects of the current
* NSPR base64 decoding code. As such, you may find similarities to
* both of those implementations. I tried to use names that reflected
* the original code when possible. For this reason you may find some
* inconsistencies -- libmime used lots of "in" and "out" whereas the
* NSPR version uses "src" and "dest"; sometimes I changed one to the other
* and sometimes I left them when I thought the subroutines were at least
* self-consistent.
*/
PR_BEGIN_EXTERN_C
/*
* Opaque object used by the decoder to store state.
*/
struct PLBase64DecoderStr {
/* Current token (or portion, if token_size < 4) being decoded. */
unsigned char token[4];
int token_size;
/*
* Where to write the decoded data (used when streaming, not when
* doing all in-memory (buffer) operations).
*
* Note that this definition is chosen to be compatible with PR_Write.
*/
PRInt32 (*output_fn) (void *output_arg, const unsigned char *buf,
PRInt32 size);
void *output_arg;
/*
* Where the decoded output goes -- either temporarily (in the streaming
* case, staged here before it goes to the output function) or what will
* be the entire buffered result for users of the buffer version.
*/
unsigned char *output_buffer;
PRUint32 output_buflen; /* the total length of allocated buffer */
PRUint32 output_length; /* the length that is currently populated */
};
PR_END_EXTERN_C
/*
* Table to convert an ascii "code" to its corresponding binary value.
* For ease of use, the binary values in the table are the actual values
* PLUS ONE. This is so that the special value of zero can denote an
* invalid mapping; that was much easier than trying to fill in the other
* values with some value other than zero, and to check for it.
* Just remember to SUBTRACT ONE when using the value retrieved.
*/
static unsigned char base64_codetovaluep1[256] = {
/* 0: */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 8: */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 16: */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 24: */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 32: */ 0, 0, 0, 0, 0, 0, 0, 0,
/* 40: */ 0, 0, 0, 63, 0, 0, 0, 64,
/* 48: */ 53, 54, 55, 56, 57, 58, 59, 60,
/* 56: */ 61, 62, 0, 0, 0, 0, 0, 0,
/* 64: */ 0, 1, 2, 3, 4, 5, 6, 7,
/* 72: */ 8, 9, 10, 11, 12, 13, 14, 15,
/* 80: */ 16, 17, 18, 19, 20, 21, 22, 23,
/* 88: */ 24, 25, 26, 0, 0, 0, 0, 0,
/* 96: */ 0, 27, 28, 29, 30, 31, 32, 33,
/* 104: */ 34, 35, 36, 37, 38, 39, 40, 41,
/* 112: */ 42, 43, 44, 45, 46, 47, 48, 49,
/* 120: */ 50, 51, 52, 0, 0, 0, 0, 0,
/* 128: */ 0, 0, 0, 0, 0, 0, 0, 0
/* and rest are all zero as well */
};
#define B64_PAD '='
/*
* Reads 4; writes 3 (known, or expected, to have no trailing padding).
* Returns bytes written; -1 on error (unexpected character).
*/
static int
pl_base64_decode_4to3 (const unsigned char *in, unsigned char *out)
{
int j;
PRUint32 num = 0;
unsigned char bits;
for (j = 0; j < 4; j++) {
bits = base64_codetovaluep1[in[j]];
if (bits == 0)
return -1;
num = (num << 6) | (bits - 1);
}
out[0] = (unsigned char) (num >> 16);
out[1] = (unsigned char) ((num >> 8) & 0xFF);
out[2] = (unsigned char) (num & 0xFF);
return 3;
}
/*
* Reads 3; writes 2 (caller already confirmed EOF or trailing padding).
* Returns bytes written; -1 on error (unexpected character).
*/
static int
pl_base64_decode_3to2 (const unsigned char *in, unsigned char *out)
{
PRUint32 num = 0;
unsigned char bits1, bits2, bits3;
bits1 = base64_codetovaluep1[in[0]];
bits2 = base64_codetovaluep1[in[1]];
bits3 = base64_codetovaluep1[in[2]];
if ((bits1 == 0) || (bits2 == 0) || (bits3 == 0))
return -1;
num = ((PRUint32)(bits1 - 1)) << 10;
num |= ((PRUint32)(bits2 - 1)) << 4;
num |= ((PRUint32)(bits3 - 1)) >> 2;
out[0] = (unsigned char) (num >> 8);
out[1] = (unsigned char) (num & 0xFF);
return 2;
}
/*
* Reads 2; writes 1 (caller already confirmed EOF or trailing padding).
* Returns bytes written; -1 on error (unexpected character).
*/
static int
pl_base64_decode_2to1 (const unsigned char *in, unsigned char *out)
{
PRUint32 num = 0;
unsigned char bits1, bits2;
bits1 = base64_codetovaluep1[in[0]];
bits2 = base64_codetovaluep1[in[1]];
if ((bits1 == 0) || (bits2 == 0))
return -1;
num = ((PRUint32)(bits1 - 1)) << 2;
num |= ((PRUint32)(bits2 - 1)) >> 4;
out[0] = (unsigned char) num;
return 1;
}
/*
* Reads 4; writes 0-3. Returns bytes written or -1 on error.
* (Writes less than 3 only at (presumed) EOF.)
*/
static int
pl_base64_decode_token (const unsigned char *in, unsigned char *out)
{
if (in[3] != B64_PAD)
return pl_base64_decode_4to3 (in, out);
if (in[2] == B64_PAD)
return pl_base64_decode_2to1 (in, out);
return pl_base64_decode_3to2 (in, out);
}
static PRStatus
pl_base64_decode_buffer (PLBase64Decoder *data, const unsigned char *in,
PRUint32 length)
{
unsigned char *out = data->output_buffer;
unsigned char *token = data->token;
int i, n = 0;
i = data->token_size;
data->token_size = 0;
while (length > 0) {
while (i < 4 && length > 0) {
/*
* XXX Note that the following simply ignores any unexpected
* characters. This is exactly what the original code in
* libmime did, and I am leaving it. We certainly want to skip
* over whitespace (we must); this does much more than that.
* I am not confident changing it, and I don't want to slow
* the processing down doing more complicated checking, but
* someone else might have different ideas in the future.
*/
if (base64_codetovaluep1[*in] > 0 || *in == B64_PAD)
token[i++] = *in;
in++;
length--;
}
if (i < 4) {
/* Didn't get enough for a complete token. */
data->token_size = i;
break;
}
i = 0;
PR_ASSERT((out - data->output_buffer + 3) <= data->output_buflen);
/*
* Assume we are not at the end; the following function only works
* for an internal token (no trailing padding characters) but is
* faster that way. If it hits an invalid character (padding) it
* will return an error; we break out of the loop and try again
* calling the routine that will handle a final token.
* Note that we intentionally do it this way rather than explicitly
* add a check for padding here (because that would just slow down
* the normal case) nor do we rely on checking whether we have more
* input to process (because that would also slow it down but also
* because we want to allow trailing garbage, especially white space
* and cannot tell that without read-ahead, also a slow proposition).
* Whew. Understand?
*/
n = pl_base64_decode_4to3 (token, out);
if (n < 0)
break;
/* Advance "out" by the number of bytes just written to it. */
out += n;
n = 0;
}
/*
* See big comment above, before call to pl_base64_decode_4to3.
* Here we check if we error'd out of loop, and allow for the case
* that we are processing the last interesting token. If the routine
* which should handle padding characters also fails, then we just
* have bad input and give up.
*/
if (n < 0) {
n = pl_base64_decode_token (token, out);
if (n < 0)
return PR_FAILURE;
out += n;
}
/*
* As explained above, we can get here with more input remaining, but
* it should be all characters we do not care about (i.e. would be
* ignored when transferring from "in" to "token" in loop above,
* except here we choose to ignore extraneous pad characters, too).
* Swallow it, performing that check. If we find more characters that
* we would expect to decode, something is wrong.
*/
while (length > 0) {
if (base64_codetovaluep1[*in] > 0)
return PR_FAILURE;
in++;
length--;
}
/* Record the length of decoded data we have left in output_buffer. */
data->output_length = (PRUint32) (out - data->output_buffer);
return PR_SUCCESS;
}
/*
* Flush any remaining buffered characters. Given well-formed input,
* this will have nothing to do. If the input was missing the padding
* characters at the end, though, there could be 1-3 characters left
* behind -- we will tolerate that by adding the padding for them.
*/
static PRStatus
pl_base64_decode_flush (PLBase64Decoder *data)
{
int count;
/*
* If no remaining characters, or all are padding (also not well-formed
* input, but again, be tolerant), then nothing more to do. (And, that
* is considered successful.)
*/
if (data->token_size == 0 || data->token[0] == B64_PAD)
return PR_SUCCESS;
/*
* Assume we have all the interesting input except for some expected
* padding characters. Add them and decode the resulting token.
*/
while (data->token_size < 4)
data->token[data->token_size++] = B64_PAD;
data->token_size = 0; /* so a subsequent flush call is a no-op */
count = pl_base64_decode_token (data->token,
data->output_buffer + data->output_length);
if (count < 0)
return PR_FAILURE;
/*
* If there is an output function, call it with this last bit of data.
* Otherwise we are doing all buffered output, and the decoded bytes
* are now there, we just need to reflect that in the length.
*/
if (data->output_fn != NULL) {
PRInt32 output_result;
PR_ASSERT(data->output_length == 0);
output_result = data->output_fn (data->output_arg,
data->output_buffer,
(PRInt32) count);
if (output_result < 0)
return PR_FAILURE;
} else {
data->output_length += count;
}
return PR_SUCCESS;
}
/*
* The maximum space needed to hold the output of the decoder given
* input data of length "size".
*/
static PRUint32
PL_Base64MaxDecodedLength (PRUint32 size)
{
return ((size * 3) / 4);
}
/*
* A distinct internal creation function for the buffer version to use.
* (It does not want to specify an output_fn, and we want the normal
* Create function to require that.) If more common initialization
* of the decoding context needs to be done, it should be done *here*.
*/
static PLBase64Decoder *
pl_base64_create_decoder (void)
{
return PR_NEWZAP(PLBase64Decoder);
}
/*
* Function to start a base64 decoding context.
* An "output_fn" is required; the "output_arg" parameter to that is optional.
*/
static PLBase64Decoder *
PL_CreateBase64Decoder (PRInt32 (*output_fn) (void *, const unsigned char *,
PRInt32),
void *output_arg)
{
PLBase64Decoder *data;
if (output_fn == NULL) {
PR_SetError (PR_INVALID_ARGUMENT_ERROR, 0);
return NULL;
}
data = pl_base64_create_decoder ();
if (data != NULL) {
data->output_fn = output_fn;
data->output_arg = output_arg;
}
return data;
}
/*
* Push data through the decoder, causing the output_fn (provided to Create)
* to be called with the decoded data.
*/
static PRStatus
PL_UpdateBase64Decoder (PLBase64Decoder *data, const char *buffer,
PRUint32 size)
{
PRUint32 need_length;
PRStatus status;
/* XXX Should we do argument checking only in debug build? */
if (data == NULL || buffer == NULL || size == 0) {
PR_SetError (PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
/*
* How much space could this update need for decoding?
*/
need_length = PL_Base64MaxDecodedLength (size + data->token_size);
/*
* Make sure we have at least that much. If not, (re-)allocate.
*/
if (need_length > data->output_buflen) {
unsigned char *output_buffer = data->output_buffer;
if (output_buffer != NULL)
output_buffer = (unsigned char *) PR_Realloc(output_buffer,
need_length);
else
output_buffer = (unsigned char *) PR_Malloc(need_length);
if (output_buffer == NULL)
return PR_FAILURE;
data->output_buffer = output_buffer;
data->output_buflen = need_length;
}
/* There should not have been any leftover output data in the buffer. */
PR_ASSERT(data->output_length == 0);
data->output_length = 0;
status = pl_base64_decode_buffer (data, (const unsigned char *) buffer,
size);
/* Now that we have some decoded data, write it. */
if (status == PR_SUCCESS && data->output_length > 0) {
PRInt32 output_result;
PR_ASSERT(data->output_fn != NULL);
output_result = data->output_fn (data->output_arg,
data->output_buffer,
(PRInt32) data->output_length);
if (output_result < 0)
status = PR_FAILURE;
}
data->output_length = 0;
return status;
}
/*
* When you're done decoding, call this to free the data. If "abort_p"
* is false, then calling this may cause the output_fn to be called
* one last time (as the last buffered data is flushed out).
*/
static PRStatus
PL_DestroyBase64Decoder (PLBase64Decoder *data, PRBool abort_p)
{
PRStatus status = PR_SUCCESS;
/* XXX Should we do argument checking only in debug build? */
if (data == NULL) {
PR_SetError (PR_INVALID_ARGUMENT_ERROR, 0);
return PR_FAILURE;
}
/* Flush out the last few buffered characters. */
if (!abort_p)
status = pl_base64_decode_flush (data);
if (data->output_buffer != NULL)
PR_Free(data->output_buffer);
PR_Free(data);
return status;
}
/*
* Perform base64 decoding from an input buffer to an output buffer.
* The output buffer can be provided (as "dest"); you can also pass in
* a NULL and this function will allocate a buffer large enough for you,
* and return it. If you do provide the output buffer, you must also
* provide the maximum length of that buffer (as "maxdestlen").
* The actual decoded length of output will be returned to you in
* "output_destlen".
*
* Return value is NULL on error, the output buffer (allocated or provided)
* otherwise.
*/
static unsigned char *
PL_Base64DecodeBuffer (const char *src, PRUint32 srclen, unsigned char *dest,
PRUint32 maxdestlen, PRUint32 *output_destlen)
{
PRUint32 need_length;
unsigned char *output_buffer = NULL;
PLBase64Decoder *data = NULL;
PRStatus status;
PR_ASSERT(srclen > 0);
if (srclen == 0)
return dest;
/*
* How much space could we possibly need for decoding this input?
*/
need_length = PL_Base64MaxDecodedLength (srclen);
/*
* Make sure we have at least that much, if output buffer provided.
* If no output buffer provided, then we allocate that much.
*/
if (dest != NULL) {
PR_ASSERT(maxdestlen >= need_length);
if (maxdestlen < need_length) {
PR_SetError(PR_BUFFER_OVERFLOW_ERROR, 0);
goto loser;
}
output_buffer = dest;
} else {
output_buffer = (unsigned char *) PR_Malloc(need_length);
if (output_buffer == NULL)
goto loser;
maxdestlen = need_length;
}
data = pl_base64_create_decoder();
if (data == NULL)
goto loser;
data->output_buflen = maxdestlen;
data->output_buffer = output_buffer;
status = pl_base64_decode_buffer (data, (const unsigned char *) src,
srclen);
/*
* We do not wait for Destroy to flush, because Destroy will also
* get rid of our decoder context, which we need to look at first!
*/
if (status == PR_SUCCESS)
status = pl_base64_decode_flush (data);
/* Must clear this or Destroy will free it. */
data->output_buffer = NULL;
if (status == PR_SUCCESS) {
*output_destlen = data->output_length;
status = PL_DestroyBase64Decoder (data, PR_FALSE);
data = NULL;
if (status == PR_FAILURE)
goto loser;
return output_buffer;
}
loser:
if (dest == NULL && output_buffer != NULL)
PR_Free(output_buffer);
if (data != NULL)
(void) PL_DestroyBase64Decoder (data, PR_TRUE);
return NULL;
}
/*
* XXX End of base64 decoding code to be moved into NSPR.
********************************************************
*/
/*
* This is the beginning of the NSS cover functions. These will
* provide the interface we want to expose as NSS-ish. For example,
* they will operate on our Items, do any special handling or checking
* we want to do, etc.
*/
PR_BEGIN_EXTERN_C
/*
* A boring cover structure for now. Perhaps someday it will include
* some more interesting fields.
*/
struct NSSBase64DecoderStr {
PLBase64Decoder *pl_data;
};
PR_END_EXTERN_C
/*
* Function to start a base64 decoding context.
*/
NSSBase64Decoder *
NSSBase64Decoder_Create (PRInt32 (*output_fn) (void *, const unsigned char *,
PRInt32),
void *output_arg)
{
PLBase64Decoder *pl_data;
NSSBase64Decoder *nss_data;
nss_data = PORT_ZNew(NSSBase64Decoder);
if (nss_data == NULL)
return NULL;
pl_data = PL_CreateBase64Decoder (output_fn, output_arg);
if (pl_data == NULL) {
PORT_Free(nss_data);
return NULL;
}
nss_data->pl_data = pl_data;
return nss_data;
}
/*
* Push data through the decoder, causing the output_fn (provided to Create)
* to be called with the decoded data.
*/
SECStatus
NSSBase64Decoder_Update (NSSBase64Decoder *data, const char *buffer,
PRUint32 size)
{
PRStatus pr_status;
/* XXX Should we do argument checking only in debug build? */
if (data == NULL) {
PORT_SetError (SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
pr_status = PL_UpdateBase64Decoder (data->pl_data, buffer, size);
if (pr_status == PR_FAILURE)
return SECFailure;
return SECSuccess;
}
/*
* When you're done decoding, call this to free the data. If "abort_p"
* is false, then calling this may cause the output_fn to be called
* one last time (as the last buffered data is flushed out).
*/
SECStatus
NSSBase64Decoder_Destroy (NSSBase64Decoder *data, PRBool abort_p)
{
PRStatus pr_status;
/* XXX Should we do argument checking only in debug build? */
if (data == NULL) {
PORT_SetError (SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
pr_status = PL_DestroyBase64Decoder (data->pl_data, abort_p);
PORT_Free(data);
if (pr_status == PR_FAILURE)
return SECFailure;
return SECSuccess;
}
/*
* Perform base64 decoding from an ascii string "inStr" to an Item.
* The length of the input must be provided as "inLen". The Item
* may be provided (as "outItemOpt"); you can also pass in a NULL
* and the Item will be allocated for you.
*
* In any case, the data within the Item will be allocated for you.
* All allocation will happen out of the passed-in "arenaOpt", if non-NULL.
* If "arenaOpt" is NULL, standard allocation (heap) will be used and
* you will want to free the result via SECITEM_FreeItem.
*
* Return value is NULL on error, the Item (allocated or provided) otherwise.
*/
SECItem *
NSSBase64_DecodeBuffer (PRArenaPool *arenaOpt, SECItem *outItemOpt,
const char *inStr, unsigned int inLen)
{
SECItem *out_item = outItemOpt;
PRUint32 max_out_len = PL_Base64MaxDecodedLength (inLen);
PRUint32 out_len;
void *mark = NULL;
unsigned char *dummy;
PORT_Assert(outItemOpt == NULL || outItemOpt->data == NULL);
if (arenaOpt != NULL)
mark = PORT_ArenaMark (arenaOpt);
out_item = SECITEM_AllocItem (arenaOpt, outItemOpt, max_out_len);
if (out_item == NULL) {
if (arenaOpt != NULL)
PORT_ArenaRelease (arenaOpt, mark);
return NULL;
}
dummy = PL_Base64DecodeBuffer (inStr, inLen, out_item->data,
max_out_len, &out_len);
if (dummy == NULL) {
if (arenaOpt != NULL) {
PORT_ArenaRelease (arenaOpt, mark);
if (outItemOpt != NULL) {
outItemOpt->data = NULL;
outItemOpt->len = 0;
}
} else {
SECITEM_FreeItem (out_item,
(outItemOpt == NULL) ? PR_TRUE : PR_FALSE);
}
return NULL;
}
if (arenaOpt != NULL)
PORT_ArenaUnmark (arenaOpt, mark);
out_item->len = out_len;
return out_item;
}
/*
* XXX Everything below is deprecated. If you add new stuff, put it
* *above*, not below.
*/
/*
* XXX The following "ATOB" functions are provided for backward compatibility
* with current code. They should be considered strongly deprecated.
* When we can convert all our code over to using the new NSSBase64Decoder_
* functions defined above, we should get rid of these altogether. (Remove
* protoypes from base64.h as well -- actually, remove that file completely).
* If someone thinks either of these functions provides such a very useful
* interface (though, as shown, the same functionality can already be
* obtained by calling NSSBase64_DecodeBuffer directly), fine -- but then
* that API should be provided with a nice new NSSFoo name and using
* appropriate types, etc.
*/
#include "base64.h"
/*
** Return an PORT_Alloc'd string which is the base64 decoded version
** of the input string; set *lenp to the length of the returned data.
*/
unsigned char *
ATOB_AsciiToData(const char *string, unsigned int *lenp)
{
SECItem binary_item, *dummy;
binary_item.data = NULL;
binary_item.len = 0;
dummy = NSSBase64_DecodeBuffer (NULL, &binary_item, string,
(PRUint32) PORT_Strlen(string));
if (dummy == NULL)
return NULL;
PORT_Assert(dummy == &binary_item);
*lenp = dummy->len;
return dummy->data;
}
/*
** Convert from ascii to binary encoding of an item.
*/
SECStatus
ATOB_ConvertAsciiToItem(SECItem *binary_item, char *ascii)
{
SECItem *dummy;
if (binary_item == NULL) {
PORT_SetError (SEC_ERROR_INVALID_ARGS);
return SECFailure;
}
/*
* XXX Would prefer to assert here if data is non-null (actually,
* don't need to, just let NSSBase64_DecodeBuffer do it), so as to
* to catch unintended memory leaks, but callers are not clean in
* this respect so we need to explicitly clear here to avoid the
* assert in NSSBase64_DecodeBuffer.
*/
binary_item->data = NULL;
binary_item->len = 0;
dummy = NSSBase64_DecodeBuffer (NULL, binary_item, ascii,
(PRUint32) PORT_Strlen(ascii));
if (dummy == NULL)
return SECFailure;
return SECSuccess;
}
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