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RSA: Use ASN.1 helper functions

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Simplify ASN.1 parser operations by using the shared helper functions.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2021-03-12 23:24:54 +02:00
parent 72b0217ab1
commit 173e7eedef
1 changed files with 6 additions and 15 deletions
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21
src/tls/rsa.c
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@ -37,9 +37,8 @@ static const u8 * crypto_rsa_parse_integer(const u8 *pos, const u8 *end,
return NULL;
if (asn1_get_next(pos, end - pos, &hdr) < 0 ||
hdr.class != ASN1_CLASS_UNIVERSAL || hdr.tag != ASN1_TAG_INTEGER) {
wpa_printf(MSG_DEBUG, "RSA: Expected INTEGER - found class %d "
"tag 0x%x", hdr.class, hdr.tag);
!asn1_is_integer(&hdr)) {
asn1_unexpected(&hdr, "RSA: Expected INTEGER");
return NULL;
}
@ -84,12 +83,8 @@ crypto_rsa_import_public_key(const u8 *buf, size_t len)
* }
*/
if (asn1_get_next(buf, len, &hdr) < 0 ||
hdr.class != ASN1_CLASS_UNIVERSAL ||
hdr.tag != ASN1_TAG_SEQUENCE) {
wpa_printf(MSG_DEBUG, "RSA: Expected SEQUENCE "
"(public key) - found class %d tag 0x%x",
hdr.class, hdr.tag);
if (asn1_get_next(buf, len, &hdr) < 0 || !asn1_is_sequence(&hdr)) {
asn1_unexpected(&hdr, "RSA: Expected SEQUENCE (public key)");
goto error;
}
pos = hdr.payload;
@ -191,12 +186,8 @@ crypto_rsa_import_private_key(const u8 *buf, size_t len)
*
* Version ::= INTEGER -- shall be 0 for this version of the standard
*/
if (asn1_get_next(buf, len, &hdr) < 0 ||
hdr.class != ASN1_CLASS_UNIVERSAL ||
hdr.tag != ASN1_TAG_SEQUENCE) {
wpa_printf(MSG_DEBUG, "RSA: Expected SEQUENCE "
"(public key) - found class %d tag 0x%x",
hdr.class, hdr.tag);
if (asn1_get_next(buf, len, &hdr) < 0 || !asn1_is_sequence(&hdr)) {
asn1_unexpected(&hdr, "RSA: Expected SEQUENCE (public key)");
goto error;
}
pos = hdr.payload;