Calculating HMAC for a key based on password and salt

Hi,

I need to compute the HMAC of a message using a key that's derived from a
password and a salt. I tried,

char *password = "password";
char *salt = "12345678";

CRYPT_CONTEXT keyContext;
int status = cryptCreateContext(&keyContext, CRYPT_UNUSED,
CRYPT_ALGO_HMAC_SHA2);
status = cryptSetAttribute(keyContext, CRYPT_CTXINFO_KEYING_ITERATIONS, 2000
);
status = cryptSetAttributeString(keyContext, CRYPT_CTXINFO_KEYING_SALT,
salt, strlen(salt));
status = cryptSetAttributeString(keyContext, CRYPT_CTXINFO_KEYING_VALUE,
password, strlen(password));

However I get -16 as the status of the last statement. Are password based
keys not meant to be used with HMAC in Cryptlib, or am I doing something
wrong?

Thanks,
Lahiru

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