118 lines
2.5 KiB
C
118 lines
2.5 KiB
C
/*-------------------------------------------------------------------------
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*
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* protocol_openssl.c
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* OpenSSL functionality shared between frontend and backend
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*
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* This should only be used if code is compiled with OpenSSL support.
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* src/common/protocol_openssl.c
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef FRONTEND
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#include "postgres.h"
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#else
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#include "postgres_fe.h"
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#endif
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#include "common/openssl.h"
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/*
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* Replacements for APIs introduced in OpenSSL 1.1.0.
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*/
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#ifndef SSL_CTX_set_min_proto_version
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/*
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* OpenSSL versions that support TLS 1.3 shouldn't get here because they
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* already have these functions. So we don't have to keep updating the below
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* code for every new TLS version, and eventually it can go away. But let's
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* just check this to make sure ...
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*/
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#ifdef TLS1_3_VERSION
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#error OpenSSL version mismatch
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#endif
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int
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SSL_CTX_set_min_proto_version(SSL_CTX *ctx, int version)
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{
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int ssl_options = SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3;
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if (version > TLS1_VERSION)
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ssl_options |= SSL_OP_NO_TLSv1;
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/*
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* Some OpenSSL versions define TLS*_VERSION macros but not the
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* corresponding SSL_OP_NO_* macro, so in those cases we have to return
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* unsuccessfully here.
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*/
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#ifdef TLS1_1_VERSION
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if (version > TLS1_1_VERSION)
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{
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#ifdef SSL_OP_NO_TLSv1_1
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ssl_options |= SSL_OP_NO_TLSv1_1;
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#else
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return 0;
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#endif
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}
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#endif
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#ifdef TLS1_2_VERSION
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if (version > TLS1_2_VERSION)
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{
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#ifdef SSL_OP_NO_TLSv1_2
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ssl_options |= SSL_OP_NO_TLSv1_2;
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#else
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return 0;
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#endif
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}
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#endif
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SSL_CTX_set_options(ctx, ssl_options);
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return 1; /* success */
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}
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int
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SSL_CTX_set_max_proto_version(SSL_CTX *ctx, int version)
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{
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int ssl_options = 0;
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Assert(version != 0);
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/*
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* Some OpenSSL versions define TLS*_VERSION macros but not the
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* corresponding SSL_OP_NO_* macro, so in those cases we have to return
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* unsuccessfully here.
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*/
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#ifdef TLS1_1_VERSION
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if (version < TLS1_1_VERSION)
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{
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#ifdef SSL_OP_NO_TLSv1_1
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ssl_options |= SSL_OP_NO_TLSv1_1;
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#else
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return 0;
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#endif
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}
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#endif
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#ifdef TLS1_2_VERSION
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if (version < TLS1_2_VERSION)
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{
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#ifdef SSL_OP_NO_TLSv1_2
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ssl_options |= SSL_OP_NO_TLSv1_2;
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#else
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return 0;
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#endif
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}
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#endif
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SSL_CTX_set_options(ctx, ssl_options);
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return 1; /* success */
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}
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#endif /* !SSL_CTX_set_min_proto_version */
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