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Fix microqr version option out-by-one

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gitlost 2019-09-02 11:43:14 +01:00
parent ed00537283
commit c5b03f665a
5 changed files with 159 additions and 16 deletions
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34
backend/qr.c
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@ -2586,6 +2586,26 @@ int microqr(struct zint_symbol *symbol, const unsigned char source[], size_t len
return ZINT_ERROR_TOO_LONG;
}
/* Check option 1 in combination with option 2 */
ecc_level = LEVEL_L;
if (symbol->option_1 >= 1 && symbol->option_1 <= 4) {
if (symbol->option_1 == 4) {
strcpy(symbol->errtxt, "566: Error correction level H not available");
return ZINT_ERROR_INVALID_OPTION;
}
if (symbol->option_2 >= 1 && symbol->option_2 <= 4) {
if (symbol->option_2 == 1 && symbol->option_1 != 1) {
strcpy(symbol->errtxt, "574: Version M1 supports error correction level L only");
return ZINT_ERROR_INVALID_OPTION;
}
if (symbol->option_2 != 4 && symbol->option_1 == 3) {
strcpy(symbol->errtxt, "575: Error correction level Q requires Version M4");
return ZINT_ERROR_INVALID_OPTION;
}
}
ecc_level = symbol->option_1;
}
for (i = 0; i < 4; i++) {
version_valid[i] = 1;
}
@ -2688,16 +2708,6 @@ int microqr(struct zint_symbol *symbol, const unsigned char source[], size_t len
}
/* Eliminate possible versions depending on error correction level specified */
ecc_level = LEVEL_L;
if ((symbol->option_1 >= 1) && (symbol->option_2 <= 4)) {
ecc_level = symbol->option_1;
}
if (ecc_level == LEVEL_H) {
strcpy(symbol->errtxt, "566: Error correction level H not available");
return ZINT_ERROR_INVALID_OPTION;
}
if (ecc_level == LEVEL_Q) {
version_valid[0] = 0;
version_valid[1] = 0;
@ -2736,8 +2746,8 @@ int microqr(struct zint_symbol *symbol, const unsigned char source[], size_t len
version = autoversion;
/* Get version from user */
if ((symbol->option_2 >= 1) && (symbol->option_2 <= 4)) {
if (symbol->option_2 >= autoversion) {
version = symbol->option_2;
if (symbol->option_2 - 1 >= autoversion) {
version = symbol->option_2 - 1;
} else {
strcpy(symbol->errtxt, "570: Input too long for selected symbol size");
return ZINT_ERROR_TOO_LONG;