OSSL_DECODER_from_bio¶

#include <openssl/decoder.h>

int OSSL_DECODER_from_bio(OSSL_DECODER_CTX *ctx, BIO *in);
int OSSL_DECODER_from_fp(OSSL_DECODER_CTX *ctx, FILE *fp);
int OSSL_DECODER_from_data(OSSL_DECODER_CTX *ctx, const unsigned char **pdata,
                           size_t *pdata_len);

OSSL_DECODER_CTX *dctx;
EVP_PKEY *pkey = NULL;
const char *format = "PEM";   /* NULL for any format */
const char *structure = NULL; /* any structure */
const char *keytype = "RSA";  /* NULL for any key */
const unsigned char *pass = "my password";

dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, format, structure,
                                     keytype,
                                     OSSL_KEYMGMT_SELECT_KEYPAIR,
                                     NULL, NULL);
if (dctx == NULL) {
    /* error: no suitable potential decoders found */
}
if (pass != NULL)
    OSSL_DECODER_CTX_set_passphrase(dctx, pass, strlen(pass));
if (OSSL_DECODER_from_bio(dctx, bio)) {
    /* pkey is created with the decoded data from the bio */
} else {
    /* decoding failure */
}
OSSL_DECODER_CTX_free(dctx);

OSSL_DECODER_CTX *dctx;
EVP_PKEY *pkey = NULL;
const char *format = "DER";   /* NULL for any format */
const char *structure = NULL; /* any structure */
const char *keytype = "EC";   /* NULL for any key */
const unsigned char *pass = NULL
const unsigned char *data = buffer;
size_t datalen = sizeof(buffer);

dctx = OSSL_DECODER_CTX_new_for_pkey(&pkey, format, structure,
                                     keytype,
                                     OSSL_KEYMGMT_SELECT_KEYPAIR
                                     | OSSL_KEYMGMT_SELECT_DOMAIN_PARAMETERS,
                                     NULL, NULL);
if (dctx == NULL) {
    /* error: no suitable potential decoders found */
}
if (pass != NULL)
    OSSL_DECODER_CTX_set_passphrase(dctx, pass, strlen(pass));
if (OSSL_DECODER_from_data(dctx, &data, &datalen)) {
    /* pkey is created with the decoded data from the buffer */
} else {
    /* decoding failure */
}
OSSL_DECODER_CTX_free(dctx);