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Implement parse_attribute_value_ber_encoded

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Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
This commit is contained in:
Agathiyan Bragadeesh
2023-07-26 11:55:31 +01:00
parent e119f3c0ea
commit b73778d8f9
1 changed files with 38 additions and 16 deletions
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48
library/x509_create.c
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@@ -126,20 +126,21 @@ static const x509_attr_descriptor_t *x509_attr_descr_from_name(const char *name,
return cur; return cur;
} }
static const x509_attr_descriptor_t *x509_attr_descr_from_numericoid(const char *numericoid, size_t numericoid_len) static const x509_attr_descriptor_t *x509_attr_descr_from_numericoid(const char *numericoid,
size_t numericoid_len)
{ {
const x509_attr_descriptor_t *cur; const x509_attr_descriptor_t *cur;
mbedtls_asn1_buf *oid = mbedtls_calloc(1,sizeof(mbedtls_asn1_buf)); mbedtls_asn1_buf *oid = mbedtls_calloc(1, sizeof(mbedtls_asn1_buf));
int ret; int ret;
ret = mbedtls_oid_from_numeric_string(oid, numericoid, numericoid_len); ret = mbedtls_oid_from_numeric_string(oid, numericoid, numericoid_len);
if((ret == MBEDTLS_ERR_X509_ALLOC_FAILED) || (ret == MBEDTLS_ERR_ASN1_INVALID_DATA)) { if ((ret == MBEDTLS_ERR_X509_ALLOC_FAILED) || (ret == MBEDTLS_ERR_ASN1_INVALID_DATA)) {
return NULL; return NULL;
} }
for (cur = x509_attrs; cur->oid != NULL; cur++) { for (cur = x509_attrs; cur->oid != NULL; cur++) {
if (sizeof(cur->oid) == oid->len && if (strlen(cur->oid) == oid->len &&
strncmp(cur->oid, (const char*) oid->p, oid->len) == 0) { strncmp(cur->oid, (const char *) oid->p, oid->len) == 0) {
break; break;
} }
} }
@@ -170,13 +171,14 @@ static int hexpair_to_int(char c1, char c2)
} }
} }
static int parse_attribute_value_string(const char *s, int len, char *data, int *data_len) { static int parse_attribute_value_string(const char *s, int len, char *data, int *data_len)
{
const char *c = s; const char *c = s;
const char *end = c + len; const char *end = c + len;
int hexpair = 0; int hexpair = 0;
char *d = data; char *d = data;
int n; int n;
while(c < end) { while (c < end) {
if (*c == '\\') { if (*c == '\\') {
c++; c++;
@@ -203,7 +205,26 @@ static int parse_attribute_value_string(const char *s, int len, char *data, int
return 0; return 0;
} }
static int parse_attribute_value_ber_encoded(const char *s, int len, char *data, int *data_len) { static int parse_attribute_value_ber_encoded(const char *s, int len, char *data, int *data_len)
{
const char *c = s;
const char *end = c + len;
char *d = data;
int tag, n;
if ((len < 5) || (*c != '#') ||
((tag =
hexpair_to_int(*(c+1), *(c+2))) == -1) || ((*data_len = hexpair_to_int(*(c+3), *(c+4))) == -1)) {
return MBEDTLS_ERR_X509_INVALID_NAME;
}
c += 5;
while (c < end) {
if ((c + 1 >= end) || (n = hexpair_to_int(*c, *(c+1))) == -1) {
return MBEDTLS_ERR_X509_INVALID_NAME;
}
*(d++) = n;
c += 2;
}
return 0; return 0;
} }
@@ -240,14 +261,15 @@ int mbedtls_x509_string_to_names(mbedtls_asn1_named_data **head, const char *nam
in_tag = 0; in_tag = 0;
} }
if(!in_tag && ((*c == ',' && *(c-1) != '\\') || c == end)) { if (!in_tag && ((*c == ',' && *(c-1) != '\\') || c == end)) {
if(!numericoid) { if (!numericoid) {
if((parse_ret = parse_attribute_value_string(s, c - s, data, &data_len)) != 0) { if ((parse_ret = parse_attribute_value_string(s, c - s, data, &data_len)) != 0) {
return MBEDTLS_ERR_X509_INVALID_NAME; return MBEDTLS_ERR_X509_INVALID_NAME;
} }
} }
if(numericoid) { if (numericoid) {
if((parse_ret = parse_attribute_value_ber_encoded(s, c - s, data, &data_len)) != 0) { if ((parse_ret =
parse_attribute_value_ber_encoded(s, c - s, data, &data_len)) != 0) {
return MBEDTLS_ERR_X509_INVALID_NAME; return MBEDTLS_ERR_X509_INVALID_NAME;
} }
} }