55 lines
2.1 KiB
C
55 lines
2.1 KiB
C
#include "asn1.h"
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size_t scan_asn1INTEGER(const char* src,const char* max,signed long* val) {
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size_t 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 ((tmp=scan_asn1int(src,max,&tc,&tt,&tag,val)))
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if (tc==UNIVERSAL && tt==PRIMITIVE && tag==INTEGER)
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return tmp;
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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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#include "scan_asn1rawint.c"
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#include "scan_asn1int.c"
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int main() {
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char buf[100];
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long l=0;
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memset(buf,0,sizeof buf);
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strcpy(buf,"\x02\x01\x17"); // 0x02 = UNIVERSAL + CONSTRUCTED + INTEGER, 0x01 = length 1, 0x17 = value
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assert(scan_asn1INTEGER(buf,buf+3,&l)==3 && l==23);
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assert(scan_asn1INTEGER(buf,buf+2,&l)==0); // not enough input
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buf[0]=0x01;
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assert(scan_asn1INTEGER(buf,buf+3,&l)==0); // 0x01 = BOOLEAN, fails line 9
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// we only care for 100% coverage of this file, the others have their own unit tests */
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// let's do a few more to leave sample values here
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strcpy(buf,"\x02\x01\xff"); // 0x02 = UNIVERSAL + CONSTRUCTED + INTEGER, 0x01 = length 1, 0xff = value (-1)
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assert(scan_asn1INTEGER(buf,buf+3,&l)==3 && l==-1);
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strcpy(buf,"\x02\x04\x12\x34\x56\x78"); // 0x02 = UNIVERSAL + CONSTRUCTED + INTEGER, 0x01 = length 4, 0x12345678 = value
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assert(scan_asn1INTEGER(buf,buf+6,&l)==6 && l==0x12345678);
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if (sizeof(l)==8) {
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strcpy(buf,"\x02\x08\x11\x22\x33\x44\x55\x66\x77\x88");
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assert(scan_asn1INTEGER(buf,buf+10,&l)==10 && l==0x1122334455667788);
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strcpy(buf,"\x02\x08\xee\xdd\xcc\xbb\xaa\x99\x88\x78");
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assert(scan_asn1INTEGER(buf,buf+10,&l)==10 && l==-0x1122334455667788); // two's complement
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strcpy(buf,"\x02\x08\x7f\xff\xff\xff\xff\xff\xff\xff"); // LONG_MAX
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assert(scan_asn1INTEGER(buf,buf+10,&l)==10 && l==0x7ffffffffffffffful);
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memcpy(buf,"\x02\x08\x80\x00\x00\x00\x00\x00\x00\x00",10); // LONG_MIN
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assert(scan_asn1INTEGER(buf,buf+10,&l)==10 && l==(long)0x8000000000000000);
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strcpy(buf,"\x02\x08\xff\xff\xff\xff\xff\xff\xff\xff");
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assert(scan_asn1INTEGER(buf,buf+10,&l)==0); // non-minimal encoding of -1
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}
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return 0;
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}
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#endif
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