Hi, As per RFC5246 - the TLS1.2 uses SHA256, SHA384 MAC. I would appreciate any pointers on how the PRF is implemented for TLS1.2.
E.g. For TLS1.0, TLS1.1 - the HMAC-SHA1 is implemented as below. And SHA-1 uses 20bytes at a time. How many bytes SHA256 uses at a time? // First initialize the input and output to 0x36 and 0x5C respectively for (i = 0; i < 64; i++) { k_ipad[i] ^= 0x36; k_opad[i] ^= 0x5C; } /* SHA1(key XOR ipad, text); */ SHA1_Init(&context); SHA1_Update(&context, k_ipad, 64); SHA1_Update(&context, text, text_len); SHA1_Final(outbuf, &context); /* SHA1(key XOR opad, SHA1(key XOR ipad, text))*/ SHA1_Init(&context); SHA1_Update(&context, k_opad, 64); SHA1_Update(&context, outbuf, 20); SHA1_Final(outbuf, &context); Could someone please advice how is HMAC-SHA256 implemented? -- Thanks, Nilesh ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org