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adjust pkcs12 example to print out list of certificates found #366

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adjust pkcs12 example to print out list of certificates found #366

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ebe9173
adjust pkcs12 example to print out list of certificates found
JacobBarthelmeh Feb 3, 2023
e1e32e5
improvements to example print out
JacobBarthelmeh Feb 20, 2023
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52 changes: 32 additions & 20 deletions crypto/pkcs12/pkcs12-example.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,22 @@
#include <wolfssl/wolfcrypt/types.h>
#include <wolfssl/wolfcrypt/wc_port.h>

static void PRINT_BUFFER(byte* der, int derSz)
{
int i;

if (der != NULL) {
for (i = 0; i < derSz; i++) {
if (i != 0 && !(i%16)) {
printf("\n");
}
printf("%02X", der[i]);
}
printf("\n");
}
}


/* This is an example with using wc_ function for PKCS12. To see an example of
* wolfSSL_PKCS12 functions look in tests/api.c */
int main(int argc, char** argv)
Expand All @@ -37,7 +53,6 @@ int main(int argc, char** argv)
byte* certDer = NULL;
word32 keySz;
word32 certSz;
word32 i;
byte buffer[5300];
char *file;
char defaultFile[] = "./test-servercert.p12";
Expand All @@ -49,8 +64,6 @@ int main(int argc, char** argv)
return -1;
}

printf("extracting private key and certificate from PKCS12 (test-servercert.p12)\n");

pkcs12 = wc_PKCS12_new();
if (pkcs12 == NULL) {
printf("issue creating pkcs12 object\n");
Expand All @@ -63,6 +76,7 @@ int main(int argc, char** argv)
else {
file = defaultFile;
}
printf("extracting private key and certificate from PKCS12 (%s)\n", file);

/* open PKCS12 file */
f = fopen(file, "rb");
Expand All @@ -87,42 +101,40 @@ int main(int argc, char** argv)
ret = wc_PKCS12_parse(pkcs12, "wolfSSL test", &keyDer, &keySz,
&certDer, &certSz, &list);
printf("return value of parsing pkcs12 = %d %s\n", ret, (ret == 0)? "SUCCESS": "FAIL");
if (ret != 0 || keyDer == NULL || certDer == NULL) {
if (ret != 0) {
printf("\t error parsing pkcs12\n");
wc_PKCS12_free(pkcs12);
return -1;
}

/* print out key and cert found */
printf("HEX of Private Key Read (DER format) :\n");
for (i = 0; i < keySz; i++) {
if (i != 0 && !(i%16)) printf("\n");
printf("%02X", keyDer[i]);
}
printf("\n");

printf("\nHEX of Certificate Read (DER format) :\n");
for (i = 0; i < certSz; i++) {
if (i != 0 && !(i%16)) printf("\n");
printf("%02X", certDer[i]);
}
printf("\n");

if (keyDer != NULL) {
printf("HEX of Private Key Read (DER format) :\n");
PRINT_BUFFER(keyDer, keySz);
XFREE(keyDer, NULL, DYNAMIC_TYPE_PKCS);
}

if (certDer != NULL) {
printf("\nHEX of Certificate Read (DER format) :\n");
PRINT_BUFFER(certDer, certSz);
XFREE(certDer, NULL, DYNAMIC_TYPE_PKCS);
}

/* itterate through list if was not passed as null and free each node */
/* Iterate through list of certificates and print each out if was not passed
* as null, and then free each node. */
if (list != NULL) {
WC_DerCertList* current;
int certIdx = 0;

printf("\nHEX of Certificate LIST (DER format) :\n");
current = list;
while (current != NULL) {
WC_DerCertList* next = current->next;
WC_DerCertList* next;

next = current->next;
if (current->buffer != NULL) {
printf("\n[CERT %d] :", certIdx++);
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Add newline after cert number: [CERT %d] :\n... Current output (without new-line) looks like this:

HEX of Certificate LIST (DER format) :

[CERT 0] :308204AA30820392A003020102020900
B7B69033661B6B23300D06092A864886

Adding new-line would align HEX output (looks a little cleaner!)

PRINT_BUFFER(current->buffer, current->bufferSz);
XFREE(current->buffer, NULL, DYNAMIC_TYPE_PKCS);
}
XFREE(current, NULL, DYNAMIC_TYPE_PKCS);
Expand Down