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Title "UI_UTIL_READ_PW 3ossl" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
UI_UTIL_read_pw_string, UI_UTIL_read_pw, UI_UTIL_wrap_read_pem_callback - user interface utilities Header "SYNOPSIS" .Vb 1 #include <openssl/ui.h> \& int UI_UTIL_read_pw_string(char *buf, int length, const char *prompt, int verify); int UI_UTIL_read_pw(char *buf, char *buff, int size, const char *prompt, int verify); UI_METHOD *UI_UTIL_wrap_read_pem_callback(pem_password_cb *cb, int rwflag); .Ve Header "DESCRIPTION" \fBUI_UTIL_read_pw_string() asks for a passphrase, using prompt as a prompt, and stores it in buf. The maximum allowed size is given with length, including the terminating \s-1NUL\s0 byte. If verify is nonzero, the password will be verified as well.

\fBUI_UTIL_read_pw() does the same as UI_UTIL_read_pw_string(), the difference is that you can give it an external buffer buff for the verification passphrase.

\fBUI_UTIL_wrap_read_pem_callback() can be used to create a temporary \fB\s-1UI_METHOD\s0 that wraps a given \s-1PEM\s0 password callback cb. \fBrwflag is used to specify if this method will be used for passphrase entry without (0) or with (1) verification. When not used any more, the returned method should be freed with \fBUI_destroy_method().

Header "NOTES" \fBUI_UTIL_read_pw_string() and UI_UTIL_read_pw() use default \fB\s-1UI_METHOD\s0. See UI_get_default_method\|(3) and friends for more information.

The result from the \s-1UI_METHOD\s0 created by \fBUI_UTIL_wrap_read_pem_callback() will generate password strings in the encoding that the given password callback generates. The default password prompting functions (apart from \fBUI_UTIL_read_pw_string() and UI_UTIL_read_pw(), there is \fBPEM_def_callback(), EVP_read_pw_string() and EVP_read_pw_string_min()) all use the default \s-1UI_METHOD\s0.

Header "RETURN VALUES" \fBUI_UTIL_read_pw_string() and UI_UTIL_read_pw() return 0 on success or a negative value on error.

\fBUI_UTIL_wrap_read_pem_callback() returns a valid \s-1UI_METHOD\s0 structure or \s-1NULL\s0 if an error occurred.

Header "SEE ALSO" \fBUI_get_default_method\|(3) Header "COPYRIGHT" Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved.

Licensed under the Apache License 2.0 (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.