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43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
#include "fmt.h"
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#include "textcode.h"
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#include "scan.h"
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size_t scan_ldapescape(const char *src,char *dest,size_t *destlen) {
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register const unsigned char* s=(const unsigned char*) src;
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size_t written=0,i;
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for (i=0; s[i]; ++i) {
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if (s[i]=='\\') {
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unsigned char c;
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int j=scan_fromhex(s[i+1]);
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if (j<0) break;
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c=j<<4;
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j=scan_fromhex(s[i+2]);
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if (j<0) break;
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if (dest) dest[written]=c|j;
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i+=2;
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} else {
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if (dest) dest[written]=s[i];
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}
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++written;
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}
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if (destlen) *destlen=written;
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return i;
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}
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#ifdef UNITTEST
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#include <assert.h>
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#include <string.h>
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#undef UNITTEST
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#include <scan/scan_fromhex.c>
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int main() {
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size_t dl;
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char buf[100];
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assert(scan_ldapescape("test\\n\");",buf,&dl)==4 && dl==4 && !memcmp(buf,"test",4));
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/* check hex escaping */
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assert(scan_ldapescape("test\\0afoo",buf,&dl)==10 && dl==8 && !memcmp(buf,"test\nfoo",8));
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/* check that short sequences are rejected */
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assert(scan_ldapescape("test\\ax",buf,&dl)==4 && dl==4 && !memcmp(buf,"test",4));
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}
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#endif
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