Espressif ESP32-S2 Programming Manual page 567

Chapter 2. API Reference
const unsigned char *buf;
long len;
... ...
ret = SSL_CTX_use_PrivateKey_ASN1(pk, ctx, buf, len);
}
4.10 int SSL_CTX_use_RSAPrivateKey_ASN1 (SSL_CTX * ctx, const unsigned char * d, long len)
Arguments:
ctx - SSL context point
d - data point
len - private key length
Return:
1 : OK
0 : failed
Description:
load the RSA ASN1 private key into SSL context
Example:
void example(void)
{
int ret;
SSL_CTX *ctx;
const unsigned char *buf;
long len;
... ...
ret = SSL_CTX_use_RSAPrivateKey_ASN1(ctx, buf, len);
}
4.11 int SSL_use_certificate_ASN1 (SSL * ssl, int len, const unsigned char * d)
Arguments:
ssl - SSL point
len - data bytes
d - data point
Return:
1 : OK
0 : failed
Description:
load certification into the SSL
Example:
void example(void)
{
int ret;
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