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AN4683 Datasheet(PDF) 11 Page - STMicroelectronics

Part # AN4683
Description  Transport layer security protocol for SPWFxxx module
PDF  31 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4683 Datasheet(HTML) 11 Page - STMicroelectronics

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DocID027745 Rev 1
11/31
AN4683
SPWF01Sxxx use modes
31
2
SPWF01Sxxx use modes
The demonstrator allows secure TCP/IP connection to be created between the Wi-Fi
module SPWF01Sxxx (see [1] in References) and a remote server exposing secured
service. The SPWF01Sxxx module includes a lightweight SSL/TLS stack and a
cryptographic library targeted for embedded applications. The following sections illustrate
the main security features supported.
2.1
TLS protocol
The SPWF01Sxxx module integrates a lightweight SSL/TLS stack and a cryptographic
library. To meet device memory constraints, the demonstrator enables just a subset of
cryptographic algorithms with respect to Table 1. The SPWF01Sxxx implements a SSL/TLS
client with the features listed below:
–
SSLv3.0 and TLSv1.0, 1.1 and 1.2, with automatic downgrade of protocol version
–
Server and client authentication
–
Multiple hashing functions: MD5, SHA-1, SHA-256
–
Block, stream, and authenticated ciphers: AES (128 and 256, CBC), 3DES, ARC4
–
Public key algorithms: RSA (1024, 2048), ECDSA
–
Key exchange: ECDH, ECDHE
–
ECC support: EC curves over 192, 224, 384, 256, 521 bit prime field
–
X.509 certificate support, PEM format
2.2
Supported ciphers list
Table 2. Demonstrator cipher suites
Cipher suites
2 byte codes
(hex format)
Version
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256
0xC0,0x27
TLS1.2
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
0xC0,0x23
TLS1.2
TLS_ECDH_RSA_WITH_AES_128_CBC_SHA256
0xC0,0x29
TLS1.2
TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA256
0xC0,0x25
TLS1.2
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
0xC0,0x0A
TLS1.0/1.1/1.2
TLS_ECDH_ECDSA_WITH_AES_256_CBC_SHA
0xC0,0x05
TLS1.0/1.1/1.2
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA
0xC0,0x09
TLS1.0/1.1/1.2
TLS_ECDH_ECDSA_WITH_AES_128_CBC_SHA
0xC0,0x04
TLS1.0/1.1/1.2
TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
0xC0,0x07
TLS1.0/1.1/1.2
TLS_ECDH_ECDSA_WITH_RC4_128_SHA
0xC0,0x02
TLS1.0/1.1/1.2
TLS_ECDHE_ECDSA_WITH_3DES_EDE_CBC_SHA
0xC0,0x08
TLS1.0/1.1/1.2
TLS_ECDH_ECDSA_WITH_3DES_EDE_CBC_SHA
0xC0,0x03
TLS1.0/1.1/1.2



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