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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /security/nss/lib/base/utf8.c
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'security/nss/lib/base/utf8.c')
-rw-r--r--security/nss/lib/base/utf8.c702
1 files changed, 702 insertions, 0 deletions
diff --git a/security/nss/lib/base/utf8.c b/security/nss/lib/base/utf8.c
new file mode 100644
index 0000000000..885a27afa6
--- /dev/null
+++ b/security/nss/lib/base/utf8.c
@@ -0,0 +1,702 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * utf8.c
+ *
+ * This file contains some additional utility routines required for
+ * handling UTF8 strings.
+ */
+
+#ifndef BASE_H
+#include "base.h"
+#endif /* BASE_H */
+
+#include "plstr.h"
+
+/*
+ * NOTES:
+ *
+ * There's an "is hex string" function in pki1/atav.c. If we need
+ * it in more places, pull that one out.
+ */
+
+/*
+ * nssUTF8_CaseIgnoreMatch
+ *
+ * Returns true if the two UTF8-encoded strings pointed to by the
+ * two specified NSSUTF8 pointers differ only in typcase.
+ *
+ * The error may be one of the following values:
+ * NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ * PR_TRUE if the strings match, ignoring case
+ * PR_FALSE if they don't
+ * PR_FALSE upon error
+ */
+
+NSS_IMPLEMENT PRBool
+nssUTF8_CaseIgnoreMatch(const NSSUTF8 *a, const NSSUTF8 *b, PRStatus *statusOpt)
+{
+#ifdef NSSDEBUG
+ if (((const NSSUTF8 *)NULL == a) || ((const NSSUTF8 *)NULL == b)) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return PR_FALSE;
+ }
+#endif /* NSSDEBUG */
+
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_SUCCESS;
+ }
+
+ /*
+ * XXX fgmr
+ *
+ * This is, like, so wrong!
+ */
+ if (0 == PL_strcasecmp((const char *)a, (const char *)b)) {
+ return PR_TRUE;
+ } else {
+ return PR_FALSE;
+ }
+}
+
+/*
+ * nssUTF8_PrintableMatch
+ *
+ * Returns true if the two Printable strings pointed to by the
+ * two specified NSSUTF8 pointers match when compared with the
+ * rules for Printable String (leading and trailing spaces are
+ * disregarded, extents of whitespace match irregardless of length,
+ * and case is not significant), then PR_TRUE will be returned.
+ * Otherwise, PR_FALSE will be returned. Upon failure, PR_FALSE
+ * will be returned. If the optional statusOpt argument is not
+ * NULL, then PR_SUCCESS or PR_FAILURE will be stored in that
+ * location.
+ *
+ * The error may be one of the following values:
+ * NSS_ERROR_INVALID_POINTER
+ *
+ * Return value:
+ * PR_TRUE if the strings match, ignoring case
+ * PR_FALSE if they don't
+ * PR_FALSE upon error
+ */
+
+NSS_IMPLEMENT PRBool
+nssUTF8_PrintableMatch(const NSSUTF8 *a, const NSSUTF8 *b, PRStatus *statusOpt)
+{
+ PRUint8 *c;
+ PRUint8 *d;
+
+#ifdef NSSDEBUG
+ if (((const NSSUTF8 *)NULL == a) || ((const NSSUTF8 *)NULL == b)) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return PR_FALSE;
+ }
+#endif /* NSSDEBUG */
+
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_SUCCESS;
+ }
+
+ c = (PRUint8 *)a;
+ d = (PRUint8 *)b;
+
+ while (' ' == *c) {
+ c++;
+ }
+
+ while (' ' == *d) {
+ d++;
+ }
+
+ while (('\0' != *c) && ('\0' != *d)) {
+ PRUint8 e, f;
+
+ e = *c;
+ f = *d;
+
+ if (('a' <= e) && (e <= 'z')) {
+ e -= ('a' - 'A');
+ }
+
+ if (('a' <= f) && (f <= 'z')) {
+ f -= ('a' - 'A');
+ }
+
+ if (e != f) {
+ return PR_FALSE;
+ }
+
+ c++;
+ d++;
+
+ if (' ' == *c) {
+ while (' ' == *c) {
+ c++;
+ }
+ c--;
+ }
+
+ if (' ' == *d) {
+ while (' ' == *d) {
+ d++;
+ }
+ d--;
+ }
+ }
+
+ while (' ' == *c) {
+ c++;
+ }
+
+ while (' ' == *d) {
+ d++;
+ }
+
+ if (*c == *d) {
+ /* And both '\0', btw */
+ return PR_TRUE;
+ } else {
+ return PR_FALSE;
+ }
+}
+
+/*
+ * nssUTF8_Duplicate
+ *
+ * This routine duplicates the UTF8-encoded string pointed to by the
+ * specified NSSUTF8 pointer. If the optional arenaOpt argument is
+ * not null, the memory required will be obtained from that arena;
+ * otherwise, the memory required will be obtained from the heap.
+ * A pointer to the new string will be returned. In case of error,
+ * an error will be placed on the error stack and NULL will be
+ * returned.
+ *
+ * The error may be one of the following values:
+ * NSS_ERROR_INVALID_POINTER
+ * NSS_ERROR_INVALID_ARENA
+ * NSS_ERROR_NO_MEMORY
+ */
+
+NSS_IMPLEMENT NSSUTF8 *
+nssUTF8_Duplicate(const NSSUTF8 *s, NSSArena *arenaOpt)
+{
+ NSSUTF8 *rv;
+ PRUint32 len;
+
+#ifdef NSSDEBUG
+ if ((const NSSUTF8 *)NULL == s) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ return (NSSUTF8 *)NULL;
+ }
+
+ if ((NSSArena *)NULL != arenaOpt) {
+ if (PR_SUCCESS != nssArena_verifyPointer(arenaOpt)) {
+ return (NSSUTF8 *)NULL;
+ }
+ }
+#endif /* NSSDEBUG */
+
+ len = PL_strlen((const char *)s);
+#ifdef PEDANTIC
+ if ('\0' != ((const char *)s)[len]) {
+ /* must have wrapped, e.g., too big for PRUint32 */
+ nss_SetError(NSS_ERROR_NO_MEMORY);
+ return (NSSUTF8 *)NULL;
+ }
+#endif /* PEDANTIC */
+ len++; /* zero termination */
+
+ rv = nss_ZAlloc(arenaOpt, len);
+ if ((void *)NULL == rv) {
+ return (NSSUTF8 *)NULL;
+ }
+
+ (void)nsslibc_memcpy(rv, s, len);
+ return rv;
+}
+
+/*
+ * nssUTF8_Size
+ *
+ * This routine returns the length in bytes (including the terminating
+ * null) of the UTF8-encoded string pointed to by the specified
+ * NSSUTF8 pointer. Zero is returned on error.
+ *
+ * The error may be one of the following values:
+ * NSS_ERROR_INVALID_POINTER
+ * NSS_ERROR_VALUE_TOO_LARGE
+ *
+ * Return value:
+ * 0 on error
+ * nonzero length of the string.
+ */
+
+NSS_IMPLEMENT PRUint32
+nssUTF8_Size(const NSSUTF8 *s, PRStatus *statusOpt)
+{
+ PRUint32 sv;
+
+#ifdef NSSDEBUG
+ if ((const NSSUTF8 *)NULL == s) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return 0;
+ }
+#endif /* NSSDEBUG */
+
+ sv = PL_strlen((const char *)s) + 1;
+#ifdef PEDANTIC
+ if ('\0' != ((const char *)s)[sv - 1]) {
+ /* wrapped */
+ nss_SetError(NSS_ERROR_VALUE_TOO_LARGE);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return 0;
+ }
+#endif /* PEDANTIC */
+
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_SUCCESS;
+ }
+
+ return sv;
+}
+
+/*
+ * nssUTF8_Length
+ *
+ * This routine returns the length in characters (not including the
+ * terminating null) of the UTF8-encoded string pointed to by the
+ * specified NSSUTF8 pointer.
+ *
+ * The error may be one of the following values:
+ * NSS_ERROR_INVALID_POINTER
+ * NSS_ERROR_VALUE_TOO_LARGE
+ * NSS_ERROR_INVALID_STRING
+ *
+ * Return value:
+ * length of the string (which may be zero)
+ * 0 on error
+ */
+
+NSS_IMPLEMENT PRUint32
+nssUTF8_Length(const NSSUTF8 *s, PRStatus *statusOpt)
+{
+ PRUint32 l = 0;
+ const PRUint8 *c = (const PRUint8 *)s;
+
+#ifdef NSSDEBUG
+ if ((const NSSUTF8 *)NULL == s) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ goto loser;
+ }
+#endif /* NSSDEBUG */
+
+ /*
+ * From RFC 3629:
+ *
+ * UTF8-octets = *( UTF8-char )
+ * UTF8-char = UTF8-1 / UTF8-2 / UTF8-3 / UTF8-4
+ * UTF8-1 = %x00-7F
+ * UTF8-2 = %xC2-DF UTF8-tail
+ * UTF8-3 = %xE0 %xA0-BF UTF8-tail / %xE1-EC 2( UTF8-tail ) /
+ * %xED %x80-9F UTF8-tail / %xEE-EF 2( UTF8-tail )
+ * UTF8-4 = %xF0 %x90-BF 2( UTF8-tail ) / %xF1-F3 3( UTF8-tail ) /
+ * %xF4 %x80-8F 2( UTF8-tail )
+ * UTF8-tail = %x80-BF
+ */
+
+ while (0 != *c) {
+ PRUint32 incr;
+ if (*c < 0x80) {
+ incr = 1;
+ } else if (*c < 0xC2) {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ } else if (*c < 0xE0) {
+ incr = 2;
+ } else if (*c == 0xE0) {
+ if (c[1] < 0xA0) {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ }
+ incr = 3;
+ } else if (*c < 0xF0) {
+ if (*c == 0xED && c[1] > 0x9F) {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ }
+ incr = 3;
+ } else if (*c == 0xF0) {
+ if (c[1] < 0x90) {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ }
+ incr = 4;
+ } else if (*c < 0xF4) {
+ incr = 4;
+ } else if (*c == 0xF4) {
+ if (c[1] > 0x8F) {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ }
+ incr = 4;
+ } else {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ }
+
+ l += incr;
+
+#ifdef PEDANTIC
+ if (l < incr) {
+ /* Wrapped-- too big */
+ nss_SetError(NSS_ERROR_VALUE_TOO_LARGE);
+ goto loser;
+ }
+#endif /* PEDANTIC */
+
+ {
+ const PRUint8 *d;
+ for (d = &c[1]; d < &c[incr]; d++) {
+ if ((*d & 0xC0) != 0x80) {
+ nss_SetError(NSS_ERROR_INVALID_STRING);
+ goto loser;
+ }
+ }
+ }
+
+ c += incr;
+ }
+
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_SUCCESS;
+ }
+
+ return l;
+
+loser:
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+
+ return 0;
+}
+
+/*
+ * nssUTF8_Create
+ *
+ * This routine creates a UTF8 string from a string in some other
+ * format. Some types of string may include embedded null characters,
+ * so for them the length parameter must be used. For string types
+ * that are null-terminated, the length parameter is optional; if it
+ * is zero, it will be ignored. If the optional arena argument is
+ * non-null, the memory used for the new string will be obtained from
+ * that arena, otherwise it will be obtained from the heap. This
+ * routine may return NULL upon error, in which case it will have
+ * placed an error on the error stack.
+ *
+ * The error may be one of the following:
+ * NSS_ERROR_INVALID_POINTER
+ * NSS_ERROR_NO_MEMORY
+ * NSS_ERROR_UNSUPPORTED_TYPE
+ *
+ * Return value:
+ * NULL upon error
+ * A non-null pointer to a new UTF8 string otherwise
+ */
+
+extern const NSSError NSS_ERROR_INTERNAL_ERROR; /* XXX fgmr */
+
+NSS_IMPLEMENT NSSUTF8 *
+nssUTF8_Create(NSSArena *arenaOpt, nssStringType type, const void *inputString,
+ PRUint32 size /* in bytes, not characters */
+)
+{
+ NSSUTF8 *rv = NULL;
+
+#ifdef NSSDEBUG
+ if ((NSSArena *)NULL != arenaOpt) {
+ if (PR_SUCCESS != nssArena_verifyPointer(arenaOpt)) {
+ return (NSSUTF8 *)NULL;
+ }
+ }
+
+ if ((const void *)NULL == inputString) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ return (NSSUTF8 *)NULL;
+ }
+#endif /* NSSDEBUG */
+
+ switch (type) {
+ case nssStringType_DirectoryString:
+ /* This is a composite type requiring BER */
+ nss_SetError(NSS_ERROR_UNSUPPORTED_TYPE);
+ break;
+ case nssStringType_TeletexString:
+ /*
+ * draft-ietf-pkix-ipki-part1-11 says in part:
+ *
+ * In addition, many legacy implementations support names encoded
+ * in the ISO 8859-1 character set (Latin1String) but tag them as
+ * TeletexString. The Latin1String includes characters used in
+ * Western European countries which are not part of the
+ * TeletexString charcter set. Implementations that process
+ * TeletexString SHOULD be prepared to handle the entire ISO
+ * 8859-1 character set.[ISO 8859-1].
+ */
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_PrintableString:
+ /*
+ * PrintableString consists of A-Za-z0-9 ,()+,-./:=?
+ * This is a subset of ASCII, which is a subset of UTF8.
+ * So we can just duplicate the string over.
+ */
+
+ if (0 == size) {
+ rv = nssUTF8_Duplicate((const NSSUTF8 *)inputString, arenaOpt);
+ } else {
+ rv = nss_ZAlloc(arenaOpt, size + 1);
+ if ((NSSUTF8 *)NULL == rv) {
+ return (NSSUTF8 *)NULL;
+ }
+
+ (void)nsslibc_memcpy(rv, inputString, size);
+ }
+
+ break;
+ case nssStringType_UniversalString:
+ /* 4-byte unicode */
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_BMPString:
+ /* Base Multilingual Plane of Unicode */
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_UTF8String:
+ if (0 == size) {
+ rv = nssUTF8_Duplicate((const NSSUTF8 *)inputString, arenaOpt);
+ } else {
+ rv = nss_ZAlloc(arenaOpt, size + 1);
+ if ((NSSUTF8 *)NULL == rv) {
+ return (NSSUTF8 *)NULL;
+ }
+
+ (void)nsslibc_memcpy(rv, inputString, size);
+ }
+
+ break;
+ case nssStringType_PHGString:
+ /*
+ * PHGString is an IA5String (with case-insensitive comparisons).
+ * IA5 is ~almost~ ascii; ascii has dollar-sign where IA5 has
+ * currency symbol.
+ */
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_GeneralString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ default:
+ nss_SetError(NSS_ERROR_UNSUPPORTED_TYPE);
+ break;
+ }
+
+ return rv;
+}
+
+NSS_IMPLEMENT NSSItem *
+nssUTF8_GetEncoding(NSSArena *arenaOpt, NSSItem *rvOpt, nssStringType type,
+ NSSUTF8 *string)
+{
+ NSSItem *rv = (NSSItem *)NULL;
+ PRStatus status = PR_SUCCESS;
+
+#ifdef NSSDEBUG
+ if ((NSSArena *)NULL != arenaOpt) {
+ if (PR_SUCCESS != nssArena_verifyPointer(arenaOpt)) {
+ return (NSSItem *)NULL;
+ }
+ }
+
+ if ((NSSUTF8 *)NULL == string) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ return (NSSItem *)NULL;
+ }
+#endif /* NSSDEBUG */
+
+ switch (type) {
+ case nssStringType_DirectoryString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_TeletexString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_PrintableString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_UniversalString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_BMPString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ case nssStringType_UTF8String: {
+ NSSUTF8 *dup = nssUTF8_Duplicate(string, arenaOpt);
+ if ((NSSUTF8 *)NULL == dup) {
+ return (NSSItem *)NULL;
+ }
+
+ if ((NSSItem *)NULL == rvOpt) {
+ rv = nss_ZNEW(arenaOpt, NSSItem);
+ if ((NSSItem *)NULL == rv) {
+ (void)nss_ZFreeIf(dup);
+ return (NSSItem *)NULL;
+ }
+ } else {
+ rv = rvOpt;
+ }
+
+ rv->data = dup;
+ dup = (NSSUTF8 *)NULL;
+ rv->size = nssUTF8_Size(rv->data, &status);
+ if ((0 == rv->size) && (PR_SUCCESS != status)) {
+ if ((NSSItem *)NULL == rvOpt) {
+ (void)nss_ZFreeIf(rv);
+ }
+ return (NSSItem *)NULL;
+ }
+ } break;
+ case nssStringType_PHGString:
+ nss_SetError(NSS_ERROR_INTERNAL_ERROR); /* unimplemented */
+ break;
+ default:
+ nss_SetError(NSS_ERROR_UNSUPPORTED_TYPE);
+ break;
+ }
+
+ return rv;
+}
+
+/*
+ * nssUTF8_CopyIntoFixedBuffer
+ *
+ * This will copy a UTF8 string into a fixed-length buffer, making
+ * sure that the all characters are valid. Any remaining space will
+ * be padded with the specified ASCII character, typically either
+ * null or space.
+ *
+ * Blah, blah, blah.
+ */
+
+NSS_IMPLEMENT PRStatus
+nssUTF8_CopyIntoFixedBuffer(NSSUTF8 *string, char *buffer, PRUint32 bufferSize,
+ char pad)
+{
+ PRUint32 stringSize = 0;
+
+#ifdef NSSDEBUG
+ if ((char *)NULL == buffer) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ return PR_FALSE;
+ }
+
+ if (0 == bufferSize) {
+ nss_SetError(NSS_ERROR_INVALID_ARGUMENT);
+ return PR_FALSE;
+ }
+
+ if ((pad & 0x80) != 0x00) {
+ nss_SetError(NSS_ERROR_INVALID_ARGUMENT);
+ return PR_FALSE;
+ }
+#endif /* NSSDEBUG */
+
+ if ((NSSUTF8 *)NULL == string) {
+ string = (NSSUTF8 *)"";
+ }
+
+ stringSize = nssUTF8_Size(string, (PRStatus *)NULL);
+ stringSize--; /* don't count the trailing null */
+ if (stringSize > bufferSize) {
+ PRUint32 bs = bufferSize;
+ (void)nsslibc_memcpy(buffer, string, bufferSize);
+
+ if ((((buffer[bs - 1] & 0x80) == 0x00)) ||
+ ((bs > 1) && ((buffer[bs - 2] & 0xE0) == 0xC0)) ||
+ ((bs > 2) && ((buffer[bs - 3] & 0xF0) == 0xE0)) ||
+ ((bs > 3) && ((buffer[bs - 4] & 0xF8) == 0xF0)) ||
+ ((bs > 4) && ((buffer[bs - 5] & 0xFC) == 0xF8)) ||
+ ((bs > 5) && ((buffer[bs - 6] & 0xFE) == 0xFC))) {
+ /* It fit exactly */
+ return PR_SUCCESS;
+ }
+
+ /* Too long. We have to trim the last character */
+ for (/*bs*/; bs != 0; bs--) {
+ if ((buffer[bs - 1] & 0xC0) != 0x80) {
+ buffer[bs - 1] = pad;
+ break;
+ } else {
+ buffer[bs - 1] = pad;
+ }
+ }
+ } else {
+ (void)nsslibc_memset(buffer, pad, bufferSize);
+ (void)nsslibc_memcpy(buffer, string, stringSize);
+ }
+
+ return PR_SUCCESS;
+}
+
+/*
+ * nssUTF8_Equal
+ *
+ */
+
+NSS_IMPLEMENT PRBool
+nssUTF8_Equal(const NSSUTF8 *a, const NSSUTF8 *b, PRStatus *statusOpt)
+{
+ PRUint32 la, lb;
+
+#ifdef NSSDEBUG
+ if (((const NSSUTF8 *)NULL == a) || ((const NSSUTF8 *)NULL == b)) {
+ nss_SetError(NSS_ERROR_INVALID_POINTER);
+ if ((PRStatus *)NULL != statusOpt) {
+ *statusOpt = PR_FAILURE;
+ }
+ return PR_FALSE;
+ }
+#endif /* NSSDEBUG */
+
+ la = nssUTF8_Size(a, statusOpt);
+ if (0 == la) {
+ return PR_FALSE;
+ }
+
+ lb = nssUTF8_Size(b, statusOpt);
+ if (0 == lb) {
+ return PR_FALSE;
+ }
+
+ if (la != lb) {
+ return PR_FALSE;
+ }
+
+ return nsslibc_memequal(a, b, la, statusOpt);
+}