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asn1print

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This commit is contained in:
merlokk 2018-11-19 11:14:17 +02:00
commit 62e9d0cd84
2 changed files with 28 additions and 2 deletions
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28
client/crypto/asn1utils.c
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@ -9,7 +9,13 @@
//----------------------------------------------------------------------------- //-----------------------------------------------------------------------------
#include "asn1utils.h" #include "asn1utils.h"
#include <ctype.h>
#include <stdlib.h>
#include <mbedtls/asn1.h> #include <mbedtls/asn1.h>
#include "emv/tlv.h"
#include "emv/dump.h"
#include "asn1dump.h"
#include "util.h"
int ecdsa_asn1_get_signature(uint8_t *signature, size_t signaturelen, uint8_t *rval, uint8_t *sval) { int ecdsa_asn1_get_signature(uint8_t *signature, size_t signaturelen, uint8_t *rval, uint8_t *sval) {
if (!signature || !signaturelen || !rval || !sval) if (!signature || !signaturelen || !rval || !sval)
@ -55,7 +61,27 @@ exit:
return res; return res;
} }
int asn1_print(uint8_t *asn1buf, int level) { static bool print_cb(void *data, const struct tlv *tlv, int level, bool is_leaf) {
bool candump = true;
asn1_tag_dump(tlv, stdout, level, &candump);
if (is_leaf && candump) {
dump_buffer(tlv->value, tlv->len, stdout, level);
}
return true;
}
int asn1_print(uint8_t *asn1buf, size_t asn1buflen, char *indent) {
struct tlvdb *t = NULL;
t = tlvdb_parse_multi(asn1buf, asn1buflen);
if (t) {
tlvdb_visit(t, print_cb, NULL, 0);
tlvdb_free(t);
} else {
PrintAndLogEx(ERR, "Can't parse data as TLV tree.");
return 1;
}
return 0; return 0;
} }

2
client/crypto/asn1utils.h
View file

@ -15,7 +15,7 @@
#include <stdbool.h> #include <stdbool.h>
#include <stddef.h> #include <stddef.h>
extern int asn1_print(uint8_t *asn1buf, int level); extern int asn1_print(uint8_t *asn1buf, size_t asn1buflen, char *indent);
extern int ecdsa_asn1_get_signature(uint8_t *signature, size_t signaturelen, uint8_t *rval, uint8_t *sval); extern int ecdsa_asn1_get_signature(uint8_t *signature, size_t signaturelen, uint8_t *rval, uint8_t *sval);
#endif /* asn1utils.h */ #endif /* asn1utils.h */