[openssl-dev] openssl 1.0.1p PEM_write_bio_RSAPrivateKey fail. error: ASN1_get_object:too long

Ranjith Kumar A. ranjithdrp at gmail.com
Thu Mar 17 06:32:16 UTC 2016

Hi Folks,

Need help.

I’m not able to encrypt a key using passphrase, below is the error message.

**"error:0D07209B:asn1 encoding routines:ASN1_get_object:too long"**

Have already googled for error but couldn't got much info

Snippet of my code:

unsigned char pass[] = "123456";

BIO *priv_bio = BIO_new( BIO_s_mem() );

RSA *rsa = RSA_generate_key( 2048, 65537, NULL, NULL )
ret = PEM_write_bio_RSAPrivateKey( priv_bio, rsa, EVP_aes_256_cbc(), pass,
64, NULL, NULL );

if(!ret) {

    ERR_error_string(ERR_get_error(), buffer);



The same piece of code is working on openssl-0.9.8zg.

Can I know what’s missing or any further debug steps to check this issue?


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