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...support straight TLS, SMTP over TLS, or a handful other protocols over TLS. The demonstration here focuses on SMTP over TLS only.) The demonstration with SMTP over TLS involves a one-line change in the OpenSSL s_client source code (with OpenSSL 1.0.0, at line 1129 of file apps/s_client.c). Old: BIO_printf(sbio,"STARTTLS\r\n"); New: BIO_printf(sbio,"STARTTLS\r\nRSET\r\n"); With this change, the s_client command sends the plaintext STARTTLS command ("let's turn on TLS") immediately followed by an RSET command (a relatively harmless protocol "reset"). Both...

...ce to `DH_size' /usr/local/ssl/lib/libssl.so: undefined reference to `i2d_ASN1_INTEGER' /usr/local/ssl/lib/libssl.so: undefined reference to `lh_doall_arg' /usr/local/ssl/lib/libssl.so: undefined reference to `CRYPTO_set_ex_data' /usr/local/ssl/lib/libssl.so: undefined reference to `BIO_printf' /usr/local/ssl/lib/libssl.so: undefined reference to `SHA1_Update' /usr/local/ssl/lib/libssl.so: undefined reference to `CRYPTO_lock' /usr/local/ssl/lib/libssl.so: undefined reference to `DSA_verify' /usr/local/ssl/lib/libssl.so: undefined reference to `sk_pop_free' /usr/local/...