EVP_PKEY_CTX_set1_pbe_pass - generic KDF support functions
int EVP_PKEY_CTX_set1_pbe_pass(EVP_PKEY_CTX *pctx, unsigned char *pass,
These functions are generic support functions for all KDF algorithms.
EVP_PKEY_CTX_set1_pbe_pass() sets the password to the
passlen first bytes from pass.
There is also support for string based control operations via
EVP_PKEY_CTX_ctrl_str(3). The password can be directly specified
using the type parameter "pass" or given in hex encoding
using the "hexpass" parameter.
All these functions are implemented as macros.
All these functions return 1 for success and 0 or a negative value for failure.
In particular a return value of -2 indicates the operation is not supported by
the public key algorithm.
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