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private_encrypt 

        # OpenSSL::PKey::RSA.private_encrypt

(from ruby core)
### Implementation from RSA
---
    rsa.private_encrypt(string)          -> String
    rsa.private_encrypt(string, padding) -> String

---

Encrypt `string` with the private key.  `padding` defaults to
PKCS1_PADDING. The encrypted string output can be decrypted using
#public_decrypt.

**Deprecated in version 3.0**. Consider using PKey::PKey#sign_raw and
PKey::PKey#verify_raw, and PKey::PKey#verify_recover instead.

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