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Reject null bytes in DER encoded values in DNs

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Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
This commit is contained in:
Agathiyan Bragadeesh
2023-08-14 16:32:22 +01:00
parent eb55867520
commit f826d1113e
1 changed files with 3 additions and 0 deletions
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3
library/x509_create.c
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@ -239,6 +239,9 @@ static int parse_attribute_value_ber_encoded(const char *s,
if ((c + 1 >= end) || (n = hexpair_to_int(*c, *(c+1))) == -1) { if ((c + 1 >= end) || (n = hexpair_to_int(*c, *(c+1))) == -1) {
return MBEDTLS_ERR_X509_INVALID_NAME; return MBEDTLS_ERR_X509_INVALID_NAME;
} }
if (MBEDTLS_ASN1_IS_STRING_TAG(*tag) && n == 0) {
return MBEDTLS_ERR_X509_INVALID_NAME;
}
*(p++) = n; *(p++) = n;
} }
asn1_der_end = p; asn1_der_end = p;