diff options
Diffstat (limited to 'g10/getkey.c')
| -rw-r--r-- | g10/getkey.c | 204 |
1 files changed, 117 insertions, 87 deletions
diff --git a/g10/getkey.c b/g10/getkey.c index 4d747f8bc..a847d413f 100644 --- a/g10/getkey.c +++ b/g10/getkey.c @@ -539,104 +539,134 @@ int classify_user_id( const char *name, u32 *keyid, byte *fprint, const char **retstr, size_t *retlen ) { - const char *s; - int mode = 0; + const char * s; + int mode = 0; + int hexprefix = 0; + int hexlength; - /* check what kind of name it is */ + /* skip leading spaces. FIXME: what is with leading spaces? */ for(s = name; *s && isspace(*s); s++ ) ; - if( isdigit( *s ) ) { /* a keyid or a fingerprint */ - int i, j; - char buf[9]; - if( *s == '0' && s[1] == 'x' && isxdigit(s[2]) ) - s += 2; /*kludge to allow 0x034343434 */ - for(i=0; isxdigit(s[i]); i++ ) - ; - if( s[i] && !isspace(s[i]) ) /* not terminated by EOS or blank*/ + switch (*s) { + case 0: /* empty string is an error */ return 0; - else if( i == 8 || (i == 9 && *s == '0') ) { /* short keyid */ - if( i==9 ) - s++; - if( keyid ) { - keyid[0] = 0; - keyid[1] = strtoul( s, NULL, 16 ); + + case '.': /* an email address, compare from end */ + mode = 5; + s++; + break; + + case '<': /* an email address */ + mode = 3; + break; + + case '@': /* part of an email address */ + mode = 4; + s++; + break; + + case '=': /* exact compare */ + mode = 1; + s++; + break; + + case '*': /* case insensitive substring search */ + mode = 2; + s++; + break; + + case '+': /* compare individual words */ + mode = 6; + s++; + break; + + case '#': /* local user id */ + mode = 12; + s++; + if (keyid) { + if (keyid_from_lid(strtoul(s, NULL, 10), keyid)) + keyid[0] = keyid[1] = 0; } - mode = 10; - } - else if( i == 16 || (i == 17 && *s == '0') ) { /* complete keyid */ - if( i==17 ) - s++; - mem2str(buf, s, 9 ); - keyid[0] = strtoul( buf, NULL, 16 ); - keyid[1] = strtoul( s+8, NULL, 16 ); - mode = 11; - } - else if( i == 32 || ( i == 33 && *s == '0' ) ) { /* md5 fingerprint */ - if( i==33 ) - s++; - if( fprint ) { - memset(fprint+16, 4, 0); - for(j=0; j < 16; j++, s+=2 ) { - int c = hextobyte( s ); - if( c == -1 ) - return 0; - fprint[j] = c; + break; + + default: + if (s[0] == '0' && s[1] == 'x') { + hexprefix = 1; + s += 2; + } + + hexlength = strspn(s, "0123456789abcdefABCDEF"); + + /* check if a hexadecimal number is terminated by EOS or blank */ + if (hexlength && s[hexlength] && !isspace(s[hexlength])) { + if (hexprefix) /* a "0x" prefix without correct */ + return 0; /* termination is an error */ + else /* The first chars looked like */ + hexlength = 0; /* a hex number, but really were not. */ + } + + if (hexlength == 8 || (!hexprefix && hexlength == 9 && *s == '0')){ + /* short keyid */ + if (hexlength == 9) + s++; + if (keyid) { + keyid[0] = 0; + keyid[1] = strtoul( s, NULL, 16 ); } + mode = 10; } - mode = 16; - } - else if( i == 40 || ( i == 41 && *s == '0' ) ) { /* sha1/rmd160 fprint*/ - if( i==33 ) - s++; - if( fprint ) { - for(j=0; j < 20; j++, s+=2 ) { - int c = hextobyte( s ); - if( c == -1 ) - return 0; - fprint[j] = c; + else if (hexlength == 16 || (!hexprefix && hexlength == 17 + && *s == '0')) { + /* complete keyid */ + char buf[9]; + if (hexlength == 17) + s++; + mem2str(buf, s, 9 ); + keyid[0] = strtoul( buf, NULL, 16 ); + keyid[1] = strtoul( s+8, NULL, 16 ); + mode = 11; + } + else if (hexlength == 32 || (!hexprefix && hexlength == 33 + && *s == '0')) { + /* md5 fingerprint */ + int i; + if (hexlength == 33) + s++; + if (fprint) { + memset(fprint+16, 4, 0); + for (i=0; i < 16; i++, s+=2) { + int c = hextobyte(s); + if (c == -1) + return 0; + fprint[i] = c; + } } + mode = 16; + } + else if (hexlength == 40 || (!hexprefix && hexlength == 41 + && *s == '0')) { + /* sha1/rmd160 fingerprint */ + int i; + if (hexlength == 41) + s++; + if (fprint) { + for (i=0; i < 20; i++, s+=2) { + int c = hextobyte(s); + if (c == -1) + return 0; + fprint[i] = c; + } + } + mode = 20; + } + else { + if (hexprefix) /* This was a hex number with a prefix */ + return 0; /* and a wrong length */ + + mode = 2; /* Default is case insensitive substring search */ } - mode = 20; - } - else - return 0; - } - else if( *s == '=' ) { /* exact search */ - mode = 1; - s++; - } - else if( *s == '*' ) { /* substring search */ - mode = 2; - s++; - } - else if( *s == '<' ) { /* an email address */ - mode = 3; - } - else if( *s == '@' ) { /* a part of an email address */ - mode = 4; - s++; - } - else if( *s == '.' ) { /* an email address, compare from end */ - mode = 5; - s++; - } - else if( *s == '+' ) { /* word match mode */ - mode = 6; - s++; - } - else if( *s == '#' ) { /* use local id */ - mode = 12; - s++; - if( keyid ) { - if( keyid_from_lid( strtoul( s, NULL, 10), keyid ) ) - keyid[0] = keyid[1] = 0; - } } - else if( !*s ) /* empty string */ - return 0; - else - mode = 2; if( retstr ) *retstr = s; |