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ssl_client.c: Expand ssl_write_client_hello_body doc with TLS 1.2 case

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Signed-off-by: Ronald Cron <ronald.cron@arm.com>
This commit is contained in:
Ronald Cron 2022-02-18 17:38:42 +01:00
parent 71c2332860
commit 5456a7f89c
1 changed files with 18 additions and 1 deletions
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19
library/ssl_client.c
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@ -174,7 +174,7 @@ static int ssl_write_client_hello_cipher_suites(
}
/*
* Structure of ClientHello message:
* Structure of the TLS 1.3 ClientHello message:
*
* struct {
* ProtocolVersion legacy_version = 0x0303; // TLS v1.2
@ -184,6 +184,23 @@ static int ssl_write_client_hello_cipher_suites(
* opaque legacy_compression_methods<1..2^8-1>;
* Extension extensions<8..2^16-1>;
* } ClientHello;
*
* Structure of the (D)TLS 1.2 ClientHello message:
*
* struct {
* ProtocolVersion client_version;
* Random random;
* SessionID session_id;
* opaque cookie<0..2^8-1>; // DTLS 1.2 ONLY
* CipherSuite cipher_suites<2..2^16-2>;
* CompressionMethod compression_methods<1..2^8-1>;
* select (extensions_present) {
* case false:
* struct {};
* case true:
* Extension extensions<0..2^16-1>;
* };
* } ClientHello;
*/
static int ssl_write_client_hello_body( mbedtls_ssl_context *ssl,
unsigned char *buf,