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Adding some comments for easier understand

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Signed-off-by: toth92g <toth92g@gmail.com>
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toth92g
2021-05-11 12:55:58 +02:00
committed by Przemek Stekiel
parent 9085cff438
commit 9232e0ad84
1 changed files with 5 additions and 0 deletions
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5
library/x509_crt.c
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@ -756,17 +756,22 @@ static int x509_get_authority_key_id(unsigned char **p,
} else { } else {
authority_key_id->keyIdentifier.len = len; authority_key_id->keyIdentifier.len = len;
authority_key_id->keyIdentifier.p = *p; authority_key_id->keyIdentifier.p = *p;
/* Setting tag of the keyIdentfier intentionally to 0x04.
* Although the .keyIdentfier field is CONTEXT_SPECIFIC ([0] OPTIONAL),
* its tag with the content is the payload of on OCTET STRING primitive */
authority_key_id->keyIdentifier.tag = MBEDTLS_ASN1_OCTET_STRING; authority_key_id->keyIdentifier.tag = MBEDTLS_ASN1_OCTET_STRING;
*p += len; *p += len;
} }
if (*p < end) { if (*p < end) {
/* Getting authorityCertIssuer using the required specific class tag [1] */
if ((ret = mbedtls_asn1_get_tag(p, end, &len, if ((ret = mbedtls_asn1_get_tag(p, end, &len,
MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED |
1)) != 0) { 1)) != 0) {
/* authorityCertIssuer is an OPTIONAL field */ /* authorityCertIssuer is an OPTIONAL field */
} else { } else {
/* Getting directoryName using the required specific class tag [4] */
if ((ret = mbedtls_asn1_get_tag(p, end, &len, if ((ret = mbedtls_asn1_get_tag(p, end, &len,
MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONTEXT_SPECIFIC |
MBEDTLS_ASN1_CONSTRUCTED | 4)) != 0) { MBEDTLS_ASN1_CONSTRUCTED | 4)) != 0) {