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Verification infrastructure

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Similar model to enrollment.
This commit is contained in:
Daniel Drake 2007-10-14 00:58:45 +01:00
parent 39271b4fe5
commit 68bdfc7868
4 changed files with 100 additions and 2 deletions
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56
examples/verify.c
View file

@ -85,10 +85,45 @@ struct fp_print_data *enroll(struct fp_dev *dev) {
return NULL;
}
printf("Enrollment completed!\n");
printf("Enrollment completed!\n\n");
return enrolled_print;
}
int verify(struct fp_dev *dev, struct fp_print_data *data)
{
int r;
do {
sleep(1);
printf("\nScan your finger now.\n");
r = fp_verify_finger(dev, data);
if (r < 0) {
printf("verification failed with error %d :(\n", r);
return r;
}
switch (r) {
case FP_VERIFY_NO_MATCH:
printf("NO MATCH!\n");
return 0;
case FP_VERIFY_MATCH:
printf("MATCH!\n");
return 0;
case FP_VERIFY_RETRY:
printf("Scan didn't quite work. Please try again.\n");
break;
case FP_VERIFY_RETRY_TOO_SHORT:
printf("Swipe was too short, please try again.\n");
break;
case FP_VERIFY_RETRY_CENTER_FINGER:
printf("Please center your finger on the sensor and try again.\n");
break;
case FP_VERIFY_RETRY_REMOVE_FINGER:
printf("Please remove finger from the sensor and try again.\n");
break;
}
} while (1);
}
int main(void)
{
int r;
@ -128,7 +163,24 @@ int main(void)
if (!data)
goto out_close;
ret = 0;
printf("Normally we'd save that print to disk, and recall it at some "
"point later when we want to authenticate the user who just "
"enrolled. In the interests of demonstration, we'll authenticate "
"that user immediately.\n");
do {
char buffer[20];
verify(dev, data);
printf("Verify again? [Y/n]? ");
fgets(buffer, sizeof(buffer), stdin);
buffer[sizeof(buffer) - 1] = 0; /* null-terminate */
if (buffer[0] != '\n' && buffer[0] != 'y' && buffer[0] != 'Y')
break;
} while (1);
fp_print_data_free(data);
out_close:
fp_dev_close(dev);
return ret;

33
libfprint/core.c
View file

@ -295,6 +295,39 @@ API_EXPORTED int fp_enroll_finger(struct fp_dev *dev,
return ret;
}
API_EXPORTED int fp_verify_finger(struct fp_dev *dev,
struct fp_print_data *enrolled_print)
{
const struct fp_driver *drv = dev->drv;
int r;
if (!enrolled_print) {
fp_err("no print given");
return -EINVAL;
}
if (!drv->verify) {
fp_err("driver %s has no verify func", drv->name);
return -EINVAL;
}
if (!fpi_print_data_compatible(dev, enrolled_print)) {
fp_err("print is not compatible with device");
return -EINVAL;
}
fp_dbg("to be handled by %s", drv->name);
r = drv->verify(dev, enrolled_print);
if (r < 0)
fp_dbg("verify error %d", r);
else if (r == 0)
fp_dbg("result: no match");
else
fp_dbg("result: match");
return r;
}
API_EXPORTED int fp_init(void)
{
fp_dbg("");

1
libfprint/fp_internal.h
View file

@ -98,6 +98,7 @@ struct fp_driver {
void (*exit)(struct fp_dev *dev);
int (*enroll)(struct fp_dev *dev, gboolean initial, int stage,
struct fp_print_data **print_data);
int (*verify)(struct fp_dev *dev, struct fp_print_data *data);
};
extern const struct fp_driver upekts_driver;

12
libfprint/fprint.h
View file

@ -54,6 +54,18 @@ enum fp_enroll_result {
int fp_enroll_finger(struct fp_dev *dev, struct fp_print_data **print_data);
/* Verification */
enum fp_verify_result {
FP_VERIFY_NO_MATCH = 0,
FP_VERIFY_MATCH = 1,
FP_VERIFY_RETRY = FP_ENROLL_RETRY,
FP_VERIFY_RETRY_TOO_SHORT = FP_ENROLL_RETRY_TOO_SHORT,
FP_VERIFY_RETRY_CENTER_FINGER = FP_ENROLL_RETRY_CENTER_FINGER,
FP_VERIFY_RETRY_REMOVE_FINGER = FP_ENROLL_RETRY_REMOVE_FINGER,
};
int fp_verify_finger(struct fp_dev *dev, struct fp_print_data *enrolled_print);
/* Data handling */
void fp_print_data_free(struct fp_print_data *data);