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Title "SSL_CTX_GET0_PARAM 3" For nroff, turn off justification. Always turn off hyphenation; it makes
way too many mistakes in technical documents.
SSL_CTX_get0_param, SSL_get0_param, SSL_CTX_set1_param, SSL_set1_param, SSL_CTX_set_purpose, SSL_CTX_set_trust, SSL_set_purpose, SSL_set_trust - get and set verification parameters Header "SYNOPSIS" .Vb 1 #include <openssl/ssl.h> \& X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx); X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl); int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm); int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm); \& int SSL_CTX_set_purpose(SSL_CTX *ctx, int purpose); int SSL_set_purpose(SSL *ssl, int purpose); \& int SSL_CTX_set_trust(SSL_CTX *ctx, int trust); int SSL_set_trust(SSL *ssl, int trust); .Ve Header "DESCRIPTION" \fBSSL_CTX_get0_param() and SSL_get0_param() retrieve an internal pointer to the verification parameters for ctx or ssl respectively. The returned pointer must not be freed by the calling application.

\fBSSL_CTX_set1_param() and SSL_set1_param() set the verification parameters to vpm for ctx or ssl.

The functions SSL_CTX_set_purpose() and SSL_set_purpose() are shorthands which set the purpose parameter on the verification parameters object. These functions are equivalent to calling X509_VERIFY_PARAM_set_purpose() directly.

The functions SSL_CTX_set_trust() and SSL_set_trust() are similarly shorthands which set the trust parameter on the verification parameters object. These functions are equivalent to calling X509_VERIFY_PARAM_set_trust() directly.

Header "NOTES" Typically parameters are retrieved from an \s-1SSL_CTX\s0 or \s-1SSL\s0 structure using SSL_CTX_get0_param() or SSL_get0_param() and an application modifies them to suit its needs: for example to add a hostname check. Header "RETURN VALUES" \fBSSL_CTX_get0_param() and SSL_get0_param() return a pointer to an \fBX509_VERIFY_PARAM structure.

\fBSSL_CTX_set1_param(), SSL_set1_param(), SSL_CTX_set_purpose(), \fBSSL_set_purpose(), SSL_CTX_set_trust() and SSL_set_trust() return 1 for success and 0 for failure.

Header "EXAMPLES" Check hostname matches \*(L"www.foo.com\*(R" in peer certificate:

.Vb 2 X509_VERIFY_PARAM *vpm = SSL_get0_param(ssl); X509_VERIFY_PARAM_set1_host(vpm, "www.foo.com", 0); .Ve

Header "SEE ALSO" \fBssl\|(7), \fBX509_VERIFY_PARAM_set_flags\|(3) Header "HISTORY" These functions were added in OpenSSL 1.0.2. Header "COPYRIGHT" Copyright 2015-2022 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>.