Initialize ctx for encryption with cipher, key, and iv.
Declared in <openssl/evp.h>
int
EVP_EncryptInit(
EVP_CIPHER_CTX* ctx,
EVP_CIPHER const* cipher,
unsigned char const* key,
unsigned char const* iv);1 on success, or 0 on failure.
| Name | Description |
|---|---|
| ctx | Cipher context to initialize (must already be allocated). |
| cipher | Cipher algorithm, or NULL to reuse the previous cipher while setting a new key/IV. |
| key | Encryption key bytes, or NULL to set the cipher without a key yet. |
| iv | Initialization vector, or NULL when the cipher does not use an IV or the IV is set later. |