43 lines
1.2 KiB
C
43 lines
1.2 KiB
C
#include "asn1.h"
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size_t scan_asn1SET(const char* src,const char* max,size_t* len) {
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size_t res,tmp;
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unsigned long tag;
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enum asn1_tagclass tc;
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enum asn1_tagtype tt;
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if (!(res=scan_asn1tag(src,max,&tc,&tt,&tag)))
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return 0;
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if (!(tmp=scan_asn1length(src+res,max,len)))
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return 0;
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res+=tmp;
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if (tc==UNIVERSAL && tt==CONSTRUCTED && tag==SET_OF)
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return res;
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return 0;
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}
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#ifdef UNITTEST
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#include <string.h>
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#include <assert.h>
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#undef UNITTEST
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#include "scan_asn1tag.c"
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#include "scan_asn1tagint.c"
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#include "scan_asn1length.c"
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int main() {
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char buf[100];
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size_t l;
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strcpy(buf,"\x31\x01\x01"); // 0x31 = UNIVERSAL + CONSTRUCTED + SET_OF, 0x01 = length 1, 0x01 = dummy filler
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// this function only parses the header so our test data doesn't need
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// to have an actual set, only the header for one. \x01 is not a valid
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// set.
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assert(scan_asn1SET(buf,buf+3,&l)==2 && l==1);
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assert(scan_asn1SET(buf,buf,&l)==0); // not enough input, first return 0
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assert(scan_asn1SET(buf,buf+2,&l)==0); // not enough input, second return 0
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buf[0]=0x30;
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assert(scan_asn1SET(buf,buf+3,&l)==0); // 0x30 = SEQUENCE_OF, third return 0
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// we only care for 100% coverage of this file, the others have their own unit tests */
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return 0;
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}
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#endif
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