add fn sigil_print_digest

prints in hex format ASN1_OCTET_STRING

include/cryptography.h

@@ -8,8 +8,6 @@
 #include "types.h"
 
 
-void print_computed_hash(sigil_t *sgl);
-
 /** @brief Compute a message digest (hash) for the PKCS#1 signature type
  *
  * @param sgl context

include/sigil.h

@@ -121,6 +121,12 @@ sigil_err_t sigil_get_original_digest(sigil_t *sgl, ASN1_OCTET_STRING **digest);
  */
 sigil_err_t sigil_get_computed_digest(sigil_t *sgl, ASN1_OCTET_STRING **digest);
 
+/** @brief Print provided message digest to the standard output
+ *
+ * @param digest input - digest to be printed
+ */
+void sigil_print_digest(const ASN1_OCTET_STRING *digest);
+
 /** @brief Gets the subfilter value from the provided context
  *
  * @param sgl context

lib/cryptography.c

@@ -61,20 +61,6 @@ static sigil_err_t hex_to_dec(const char *in, size_t in_len, unsigned char *out,
     return ERR_NONE;
 }
 
-//void print_computed_hash(sigil_t *sgl)
-//{
-//    if (sgl == NULL || sgl->computed_hash_len <= 0)
-//        return;
-//
-//    printf("\nCOMPUTED HASH: ");
-//
-//    for (int i = 0; i < sgl->computed_hash_len; i++) {
-//        printf("%02x ", sgl->computed_hash[i]);
-//    }
-//
-//    printf("\n");
-//}
-
 sigil_err_t compute_digest_pkcs1(sigil_t *sgl)
 {
     sigil_err_t err;

lib/sigil.c

@@ -413,6 +413,25 @@ sigil_err_t sigil_get_computed_digest(sigil_t *sgl, ASN1_OCTET_STRING **digest)
     return ERR_NONE;
 }
 
+void sigil_print_digest(const ASN1_OCTET_STRING *digest)
+{
+    const unsigned char *digest_data;
+    int digest_len;
+
+    if (digest == NULL)
+        return;
+
+    digest_len = ASN1_STRING_length(digest);
+    digest_data = ASN1_STRING_get0_data(digest);
+
+    if (digest_len < 0 || digest_data == NULL)
+        return;
+
+    for (int i = 0; i < digest_len; i++) {
+        printf("%02x ", digest_data[i]);
+    }
+}
+
 sigil_err_t sigil_get_subfilter(sigil_t *sgl, int *subfilter)
 {
     if (sgl == NULL || subfilter == NULL)