Hi Matt, Thanks for response.
> 1) Supress or a way to remove secp521r1 from the currenlty installed > openssl. You can specify the list of groups by calling SSL_CTX_set1_groups_list (or SSL_set1_groups_list) from your application. See: https://www.openssl.org/docs/man1.1.1/man3/SSL_CTX_set1_groups_list.html --> Is there a way I can compile openssl itself to exclude 'secp521r1' and install? The reason I ask is because application I am testing is squid( squid-cache.org) for ssl bumping purposes and it has limited configurability . Thanks, Vinod On Fri, Jul 2, 2021 at 4:32 PM Matt Caswell <m...@openssl.org> wrote: > > > On 01/07/2021 07:21, vinod mg wrote: > > 1) Supress or a way to remove secp521r1 from the currenlty installed > > openssl. > > You can specify the list of groups by calling SSL_CTX_set1_groups_list > (or SSL_set1_groups_list) from your application. See: > > https://www.openssl.org/docs/man1.1.1/man3/SSL_CTX_set1_groups_list.html > > > 2) Add the cipher - "0xbaba TLS_GREASE_BA GREASE" like we see in > > chrome. > > This is not a real cipher. It does nothing and is always ignored. > OpenSSL does not support sending this value. > > Matt > > > > > > I am ok with custom install as well, if above cannot be done with > > already installed openssl package. Please share any wiki I can > > follow to impliment the same. > > > > ~]# openssl ecparam -list_curves > > > > secp224r1 : NIST/SECG curve over a 224 bit prime field > > > > secp256k1 : SECG curve over a 256 bit prime field > > > > secp384r1 : NIST/SECG curve over a 384 bit prime field > > > > /secp521r1 : NIST/SECG curve over a 521 bit prime field/ > > > > prime256v1: X9.62/SECG curve over a 256 bit prime field > > > > > > I am using below OS and version- > > > > # cat /etc/redhat-release > > > > Red Hat Enterprise Linux release 8.3 (Ootpa) > > > > > > # opensslversion -a > > > > OpenSSL 1.1.1g FIPS21 Apr 2020 > > > > built on: Thu Mar 25 16:46:53 2021 UTC > > > > platform: linux-x86_64 > > > > options:bn(64,64) md2(char) rc4(16x,int) des(int) idea(int) > > blowfish(ptr) > > > > compiler: gcc -fPIC -pthread -m64 -Wa,--noexecstack -Wall -O3 -O2 -g > > -pipe -Wall -Werror=format-security -Wp,-D_FORTIFY_SOURCE=2 > > -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions -fstack-protector-strong > > -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 > > -specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic > > -fasynchronous-unwind-tables -fstack-clash-protection > > -fcf-protection -Wa,--noexecstack > > -Wa,--generate-missing-build-notes=yes > > -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -DOPENSSL_USE_NODELETE > > -DL_ENDIAN -DOPENSSL_PIC -DOPENSSL_CPUID_OBJ -DOPENSSL_IA32_SSE2 > > -DOPENSSL_BN_ASM_MONT -DOPENSSL_BN_ASM_MONT5 -DOPENSSL_BN_ASM_GF2m > > -DSHA1_ASM -DSHA256_ASM -DSHA512_ASM -DKECCAK1600_ASM -DRC4_ASM > > -DMD5_ASM -DAESNI_ASM -DVPAES_ASM -DGHASH_ASM -DECP_NISTZ256_ASM > > -DX25519_ASM -DPOLY1305_ASM -DZLIB -DNDEBUG -DPURIFY > > -DDEVRANDOM="\"/dev/urandom\"" > > -DSYSTEM_CIPHERS_FILE="/etc/crypto-policies/back-ends/openssl.config" > > > > OPENSSLDIR: "/etc/pki/tls" > > > > ENGINESDIR: "/usr/lib64/engines-1.1" > > > > Seeding source: os-specific > > > > engines:rdrand dynamic > > > > > > Really appriciate your time and help, thanks in advance. > > > > Thanks, > > Vinod > > >
