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Refactor parse_attribute_value_string

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Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
This commit is contained in:
Agathiyan Bragadeesh 2023-08-30 16:12:57 +01:00
parent 1aece47e8c
commit de02ee268e
1 changed files with 8 additions and 12 deletions
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20
library/x509_create.c
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@ -141,7 +141,7 @@ static int hexpair_to_int(const char *hexpair)
{
int n1 = hex_to_int(*hexpair);
int n2 = hex_to_int(*(hexpair + 1));
if (n1 != -1 && n2 != -1) {
return (n1 << 4) | n2;
} else {
@ -154,13 +154,12 @@ static int parse_attribute_value_string(const char *s,
unsigned char *data,
size_t *data_len)
{
const char *c = s;
const char *end = c + len;
int hexpair = 0;
const char *c;
const char *end = s + len;
unsigned char *d = data;
int n;
while (c < end) {
for (c = s; c < end; c++) {
if (*c == '\\') {
c++;
@ -169,22 +168,19 @@ static int parse_attribute_value_string(const char *s,
if (n == 0) {
return MBEDTLS_ERR_X509_INVALID_NAME;
}
hexpair = 1;
*(d++) = n;
c++;
continue;
} else if (c == end || !strchr(" ,=+<>#;\"\\", *c)) {
return MBEDTLS_ERR_X509_INVALID_NAME;
}
}
if (!hexpair) {
*(d++) = *c;
}
*(d++) = *c;
if (d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE) {
return MBEDTLS_ERR_X509_INVALID_NAME;
}
hexpair = 0;
c++;
}
*data_len = d - data;
return 0;