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resolve use of VLA in JWT encoder function

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This commit is contained in:
Rick Watson 2019-06-02 23:31:00 +01:00
parent 9c680e8826
commit bfa94b79d1
1 changed files with 8 additions and 4 deletions
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12
src/ArduinoJsonJWT.cpp
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@ -102,17 +102,21 @@ String ArduinoJsonJWT::encode(const char *cstr, int inputLen) {
base64_init_encodestate(&_state); base64_init_encodestate(&_state);
size_t encodedLength = base64_encode_expected_len(inputLen) + 1; size_t encodedLength = base64_encode_expected_len(inputLen) + 1;
#endif #endif
// prepare buffer of correct length, returning an empty string on failure
// prepare buffer of correct length char* buffer = (char*) malloc(encodedLength * sizeof(char));
char buffer[encodedLength]; if (buffer == nullptr) {
return "";
}
// encode to buffer // encode to buffer
int len = base64_encode_block(cstr, inputLen, &buffer[0], &_state); int len = base64_encode_block(cstr, inputLen, &buffer[0], &_state);
len += base64_encode_blockend(&buffer[len], &_state); len += base64_encode_blockend(&buffer[len], &_state);
buffer[len] = 0; buffer[len] = 0;
// convert to arduino string // convert to arduino string, freeing buffer
String value = String(buffer); String value = String(buffer);
free(buffer);
buffer=nullptr;
// remove padding and convert to URL safe form // remove padding and convert to URL safe form
while (value.length() > 0 && value.charAt(value.length() - 1) == '='){ while (value.length() > 0 && value.charAt(value.length() - 1) == '='){