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Algorithms supported

This page lists all quantum-safe algorithms supported by oqs-provider.

Some algorithms by default may not be enabled for use in the master code-generator template file.

As standardization for these algorithms within TLS is not done, all TLS code points/IDs can be changed from their default values to values set by environment variables. This facilitates interoperability testing with TLS1.3 implementations that use different IDs.

Code points / algorithm IDs

Algorithm name default ID enabled environment variable
frodo640aes 0x0200 Yes OQS_CODEPOINT_FRODO640AES
p256_frodo640aes 0x2F00 Yes OQS_CODEPOINT_P256_FRODO640AES
x25519_frodo640aes 0x2F80 Yes OQS_CODEPOINT_X25519_FRODO640AES
frodo640shake 0x0201 Yes OQS_CODEPOINT_FRODO640SHAKE
p256_frodo640shake 0x2F01 Yes OQS_CODEPOINT_P256_FRODO640SHAKE
x25519_frodo640shake 0x2F81 Yes OQS_CODEPOINT_X25519_FRODO640SHAKE
frodo976aes 0x0202 Yes OQS_CODEPOINT_FRODO976AES
p384_frodo976aes 0x2F02 Yes OQS_CODEPOINT_P384_FRODO976AES
x448_frodo976aes 0x2F82 Yes OQS_CODEPOINT_X448_FRODO976AES
frodo976shake 0x0203 Yes OQS_CODEPOINT_FRODO976SHAKE
p384_frodo976shake 0x2F03 Yes OQS_CODEPOINT_P384_FRODO976SHAKE
x448_frodo976shake 0x2F83 Yes OQS_CODEPOINT_X448_FRODO976SHAKE
frodo1344aes 0x0204 Yes OQS_CODEPOINT_FRODO1344AES
p521_frodo1344aes 0x2F04 Yes OQS_CODEPOINT_P521_FRODO1344AES
frodo1344shake 0x0205 Yes OQS_CODEPOINT_FRODO1344SHAKE
p521_frodo1344shake 0x2F05 Yes OQS_CODEPOINT_P521_FRODO1344SHAKE
kyber512 0x023A Yes OQS_CODEPOINT_KYBER512
p256_kyber512 0x2F3A Yes OQS_CODEPOINT_P256_KYBER512
x25519_kyber512 0x2F39 Yes OQS_CODEPOINT_X25519_KYBER512
kyber768 0x023C Yes OQS_CODEPOINT_KYBER768
p384_kyber768 0x2F3C Yes OQS_CODEPOINT_P384_KYBER768
x448_kyber768 0x2F90 Yes OQS_CODEPOINT_X448_KYBER768
x25519_kyber768 0x6399 Yes OQS_CODEPOINT_X25519_KYBER768
p256_kyber768 0x639A Yes OQS_CODEPOINT_P256_KYBER768
kyber1024 0x023D Yes OQS_CODEPOINT_KYBER1024
p521_kyber1024 0x2F3D Yes OQS_CODEPOINT_P521_KYBER1024
mlkem512 0x0247 Yes OQS_CODEPOINT_MLKEM512
p256_mlkem512 0x2F47 Yes OQS_CODEPOINT_P256_MLKEM512
x25519_mlkem512 0x2FB2 Yes OQS_CODEPOINT_X25519_MLKEM512
mlkem768 0x0248 Yes OQS_CODEPOINT_MLKEM768
p384_mlkem768 0x2F48 Yes OQS_CODEPOINT_P384_MLKEM768
x448_mlkem768 0x2FB3 Yes OQS_CODEPOINT_X448_MLKEM768
x25519_mlkem768 0x2FB4 Yes OQS_CODEPOINT_X25519_MLKEM768
p256_mlkem768 0x2FB5 Yes OQS_CODEPOINT_P256_MLKEM768
mlkem1024 0x0249 Yes OQS_CODEPOINT_MLKEM1024
p521_mlkem1024 0x2F49 Yes OQS_CODEPOINT_P521_MLKEM1024
bikel1 0x0241 Yes OQS_CODEPOINT_BIKEL1
p256_bikel1 0x2F41 Yes OQS_CODEPOINT_P256_BIKEL1
x25519_bikel1 0x2FAE Yes OQS_CODEPOINT_X25519_BIKEL1
bikel3 0x0242 Yes OQS_CODEPOINT_BIKEL3
p384_bikel3 0x2F42 Yes OQS_CODEPOINT_P384_BIKEL3
x448_bikel3 0x2FAF Yes OQS_CODEPOINT_X448_BIKEL3
bikel5 0x0243 Yes OQS_CODEPOINT_BIKEL5
p521_bikel5 0x2F43 Yes OQS_CODEPOINT_P521_BIKEL5
hqc128 0x0244 Yes OQS_CODEPOINT_HQC128
p256_hqc128 0x2F44 Yes OQS_CODEPOINT_P256_HQC128
x25519_hqc128 0x2FB0 Yes OQS_CODEPOINT_X25519_HQC128
hqc192 0x0245 Yes OQS_CODEPOINT_HQC192
p384_hqc192 0x2F45 Yes OQS_CODEPOINT_P384_HQC192
x448_hqc192 0x2FB1 Yes OQS_CODEPOINT_X448_HQC192
hqc256 0x0246 Yes OQS_CODEPOINT_HQC256
p521_hqc256 0x2F46 Yes OQS_CODEPOINT_P521_HQC256
dilithium2 0xfea0 Yes OQS_CODEPOINT_DILITHIUM2
p256_dilithium2 0xfea1 Yes OQS_CODEPOINT_P256_DILITHIUM2
rsa3072_dilithium2 0xfea2 Yes OQS_CODEPOINT_RSA3072_DILITHIUM2
dilithium3 0xfea3 Yes OQS_CODEPOINT_DILITHIUM3
p384_dilithium3 0xfea4 Yes OQS_CODEPOINT_P384_DILITHIUM3
dilithium5 0xfea5 Yes OQS_CODEPOINT_DILITHIUM5
p521_dilithium5 0xfea6 Yes OQS_CODEPOINT_P521_DILITHIUM5
mldsa44 0xfed0 Yes OQS_CODEPOINT_MLDSA44
p256_mldsa44 0xfed3 Yes OQS_CODEPOINT_P256_MLDSA44
rsa3072_mldsa44 0xfed4 Yes OQS_CODEPOINT_RSA3072_MLDSA44
mldsa65 0xfed1 Yes OQS_CODEPOINT_MLDSA65
p384_mldsa65 0xfed5 Yes OQS_CODEPOINT_P384_MLDSA65
mldsa87 0xfed2 Yes OQS_CODEPOINT_MLDSA87
p521_mldsa87 0xfed6 Yes OQS_CODEPOINT_P521_MLDSA87
falcon512 0xfeae Yes OQS_CODEPOINT_FALCON512
p256_falcon512 0xfeaf Yes OQS_CODEPOINT_P256_FALCON512
rsa3072_falcon512 0xfeb0 Yes OQS_CODEPOINT_RSA3072_FALCON512
falcon1024 0xfeb1 Yes OQS_CODEPOINT_FALCON1024
p521_falcon1024 0xfeb2 Yes OQS_CODEPOINT_P521_FALCON1024
sphincssha2128fsimple 0xfeb3 Yes OQS_CODEPOINT_SPHINCSSHA2128FSIMPLE
p256_sphincssha2128fsimple 0xfeb4 Yes OQS_CODEPOINT_P256_SPHINCSSHA2128FSIMPLE
rsa3072_sphincssha2128fsimple 0xfeb5 Yes OQS_CODEPOINT_RSA3072_SPHINCSSHA2128FSIMPLE
sphincssha2128ssimple 0xfeb6 Yes OQS_CODEPOINT_SPHINCSSHA2128SSIMPLE
p256_sphincssha2128ssimple 0xfeb7 Yes OQS_CODEPOINT_P256_SPHINCSSHA2128SSIMPLE
rsa3072_sphincssha2128ssimple 0xfeb8 Yes OQS_CODEPOINT_RSA3072_SPHINCSSHA2128SSIMPLE
sphincssha2192fsimple 0xfeb9 Yes OQS_CODEPOINT_SPHINCSSHA2192FSIMPLE
p384_sphincssha2192fsimple 0xfeba Yes OQS_CODEPOINT_P384_SPHINCSSHA2192FSIMPLE
sphincssha2192ssimple 0xfebb No OQS_CODEPOINT_SPHINCSSHA2192SSIMPLE
p384_sphincssha2192ssimple 0xfebc No OQS_CODEPOINT_P384_SPHINCSSHA2192SSIMPLE
sphincssha2256fsimple 0xfebd No OQS_CODEPOINT_SPHINCSSHA2256FSIMPLE
p521_sphincssha2256fsimple 0xfebe No OQS_CODEPOINT_P521_SPHINCSSHA2256FSIMPLE
sphincssha2256ssimple 0xfec0 No OQS_CODEPOINT_SPHINCSSHA2256SSIMPLE
p521_sphincssha2256ssimple 0xfec1 No OQS_CODEPOINT_P521_SPHINCSSHA2256SSIMPLE
sphincsshake128fsimple 0xfec2 Yes OQS_CODEPOINT_SPHINCSSHAKE128FSIMPLE
p256_sphincsshake128fsimple 0xfec3 Yes OQS_CODEPOINT_P256_SPHINCSSHAKE128FSIMPLE
rsa3072_sphincsshake128fsimple 0xfec4 Yes OQS_CODEPOINT_RSA3072_SPHINCSSHAKE128FSIMPLE
sphincsshake128ssimple 0xfec5 No OQS_CODEPOINT_SPHINCSSHAKE128SSIMPLE
p256_sphincsshake128ssimple 0xfec6 No OQS_CODEPOINT_P256_SPHINCSSHAKE128SSIMPLE
rsa3072_sphincsshake128ssimple 0xfec7 No OQS_CODEPOINT_RSA3072_SPHINCSSHAKE128SSIMPLE
sphincsshake192fsimple 0xfec8 No OQS_CODEPOINT_SPHINCSSHAKE192FSIMPLE
p384_sphincsshake192fsimple 0xfec9 No OQS_CODEPOINT_P384_SPHINCSSHAKE192FSIMPLE
sphincsshake192ssimple 0xfeca No OQS_CODEPOINT_SPHINCSSHAKE192SSIMPLE
p384_sphincsshake192ssimple 0xfecb No OQS_CODEPOINT_P384_SPHINCSSHAKE192SSIMPLE
sphincsshake256fsimple 0xfecc No OQS_CODEPOINT_SPHINCSSHAKE256FSIMPLE
p521_sphincsshake256fsimple 0xfecd No OQS_CODEPOINT_P521_SPHINCSSHAKE256FSIMPLE
sphincsshake256ssimple 0xfece No OQS_CODEPOINT_SPHINCSSHAKE256SSIMPLE
p521_sphincsshake256ssimple 0xfecf No OQS_CODEPOINT_P521_SPHINCSSHAKE256SSIMPLE

Changing code points

In order to dynamically change the code point of any one algorithm, the respective environment variable listed above has to be set to the INTeger value of the desired code point. For example, as Cloudflare has chosen 0xfe30 as the code point for their hybrid X25519_kyber512 implementation, the following command can be used to successfully confirm interoperability between the oqs-provider and the Cloudflare infrastructure using this hybrid classic/quantum-safe algorithm:

OQS_CODEPOINT_X25519_KYBER512=65072  ./openssl/apps/openssl s_client -groups x25519_kyber512 -connect cloudflare.com:443 -provider-path _build/oqsprov -provider oqsprovider -provider default

OIDs

Along the same lines as the code points, X.509 OIDs may be subject to change prior to final standardization. The environment variables below permit adapting the OIDs of all supported signature algorithms as per the table below.

Algorithm name default OID enabled environment variable
dilithium2 1.3.6.1.4.1.2.267.7.4.4 Yes OQS_OID_DILITHIUM2
p256_dilithium2 1.3.9999.2.7.1 Yes OQS_OID_P256_DILITHIUM2
rsa3072_dilithium2 1.3.9999.2.7.2 Yes OQS_OID_RSA3072_DILITHIUM2
dilithium3 1.3.6.1.4.1.2.267.7.6.5 Yes OQS_OID_DILITHIUM3
p384_dilithium3 1.3.9999.2.7.3 Yes OQS_OID_P384_DILITHIUM3
dilithium5 1.3.6.1.4.1.2.267.7.8.7 Yes OQS_OID_DILITHIUM5
p521_dilithium5 1.3.9999.2.7.4 Yes OQS_OID_P521_DILITHIUM5
mldsa44 1.3.6.1.4.1.2.267.12.4.4 Yes OQS_OID_MLDSA44
p256_mldsa44 1.3.9999.7.1 Yes OQS_OID_P256_MLDSA44
rsa3072_mldsa44 1.3.9999.7.2 Yes OQS_OID_RSA3072_MLDSA44
mldsa65 1.3.6.1.4.1.2.267.12.6.5 Yes OQS_OID_MLDSA65
p384_mldsa65 1.3.9999.7.3 Yes OQS_OID_P384_MLDSA65
mldsa87 1.3.6.1.4.1.2.267.12.8.7 Yes OQS_OID_MLDSA87
p521_mldsa87 1.3.9999.7.4 Yes OQS_OID_P521_MLDSA87
falcon512 1.3.9999.3.6 Yes OQS_OID_FALCON512
p256_falcon512 1.3.9999.3.7 Yes OQS_OID_P256_FALCON512
rsa3072_falcon512 1.3.9999.3.8 Yes OQS_OID_RSA3072_FALCON512
falcon1024 1.3.9999.3.9 Yes OQS_OID_FALCON1024
p521_falcon1024 1.3.9999.3.10 Yes OQS_OID_P521_FALCON1024
sphincssha2128fsimple 1.3.9999.6.4.13 Yes OQS_OID_SPHINCSSHA2128FSIMPLE
p256_sphincssha2128fsimple 1.3.9999.6.4.14 Yes OQS_OID_P256_SPHINCSSHA2128FSIMPLE
rsa3072_sphincssha2128fsimple 1.3.9999.6.4.15 Yes OQS_OID_RSA3072_SPHINCSSHA2128FSIMPLE
sphincssha2128ssimple 1.3.9999.6.4.16 Yes OQS_OID_SPHINCSSHA2128SSIMPLE
p256_sphincssha2128ssimple 1.3.9999.6.4.17 Yes OQS_OID_P256_SPHINCSSHA2128SSIMPLE
rsa3072_sphincssha2128ssimple 1.3.9999.6.4.18 Yes OQS_OID_RSA3072_SPHINCSSHA2128SSIMPLE
sphincssha2192fsimple 1.3.9999.6.5.10 Yes OQS_OID_SPHINCSSHA2192FSIMPLE
p384_sphincssha2192fsimple 1.3.9999.6.5.11 Yes OQS_OID_P384_SPHINCSSHA2192FSIMPLE
sphincssha2192ssimple 1.3.9999.6.5.12 No OQS_OID_SPHINCSSHA2192SSIMPLE
p384_sphincssha2192ssimple 1.3.9999.6.5.13 No OQS_OID_P384_SPHINCSSHA2192SSIMPLE
sphincssha2256fsimple 1.3.9999.6.6.10 No OQS_OID_SPHINCSSHA2256FSIMPLE
p521_sphincssha2256fsimple 1.3.9999.6.6.11 No OQS_OID_P521_SPHINCSSHA2256FSIMPLE
sphincssha2256ssimple 1.3.9999.6.6.12 No OQS_OID_SPHINCSSHA2256SSIMPLE
p521_sphincssha2256ssimple 1.3.9999.6.6.13 No OQS_OID_P521_SPHINCSSHA2256SSIMPLE
sphincsshake128fsimple 1.3.9999.6.7.13 Yes OQS_OID_SPHINCSSHAKE128FSIMPLE
p256_sphincsshake128fsimple 1.3.9999.6.7.14 Yes OQS_OID_P256_SPHINCSSHAKE128FSIMPLE
rsa3072_sphincsshake128fsimple 1.3.9999.6.7.15 Yes OQS_OID_RSA3072_SPHINCSSHAKE128FSIMPLE
sphincsshake128ssimple 1.3.9999.6.7.16 No OQS_OID_SPHINCSSHAKE128SSIMPLE
p256_sphincsshake128ssimple 1.3.9999.6.7.17 No OQS_OID_P256_SPHINCSSHAKE128SSIMPLE
rsa3072_sphincsshake128ssimple 1.3.9999.6.7.18 No OQS_OID_RSA3072_SPHINCSSHAKE128SSIMPLE
sphincsshake192fsimple 1.3.9999.6.8.10 No OQS_OID_SPHINCSSHAKE192FSIMPLE
p384_sphincsshake192fsimple 1.3.9999.6.8.11 No OQS_OID_P384_SPHINCSSHAKE192FSIMPLE
sphincsshake192ssimple 1.3.9999.6.8.12 No OQS_OID_SPHINCSSHAKE192SSIMPLE
p384_sphincsshake192ssimple 1.3.9999.6.8.13 No OQS_OID_P384_SPHINCSSHAKE192SSIMPLE
sphincsshake256fsimple 1.3.9999.6.9.10 No OQS_OID_SPHINCSSHAKE256FSIMPLE
p521_sphincsshake256fsimple 1.3.9999.6.9.11 No OQS_OID_P521_SPHINCSSHAKE256FSIMPLE
sphincsshake256ssimple 1.3.9999.6.9.12 No OQS_OID_SPHINCSSHAKE256SSIMPLE
p521_sphincsshake256ssimple 1.3.9999.6.9.13 No OQS_OID_P521_SPHINCSSHAKE256SSIMPLE

If OQS_KEM_ENCODERS is enabled the following list is also available:

Algorithm name default OID environment variable
frodo640aes 1.3.9999.99.58 OQS_OID_FRODO640AES
p256_frodo640aes 1.3.9999.99.57 OQS_OID_P256_FRODO640AES
x25519_frodo640aes 1.3.9999.99.43 OQS_OID_X25519_FRODO640AES
frodo640shake 1.3.9999.99.60 OQS_OID_FRODO640SHAKE
p256_frodo640shake 1.3.9999.99.59 OQS_OID_P256_FRODO640SHAKE
x25519_frodo640shake 1.3.9999.99.44 OQS_OID_X25519_FRODO640SHAKE
frodo976aes 1.3.9999.99.62 OQS_OID_FRODO976AES
p384_frodo976aes 1.3.9999.99.61 OQS_OID_P384_FRODO976AES
x448_frodo976aes 1.3.9999.99.45 OQS_OID_X448_FRODO976AES
frodo976shake 1.3.9999.99.64 OQS_OID_FRODO976SHAKE
p384_frodo976shake 1.3.9999.99.63 OQS_OID_P384_FRODO976SHAKE
x448_frodo976shake 1.3.9999.99.46 OQS_OID_X448_FRODO976SHAKE
frodo1344aes 1.3.9999.99.66 OQS_OID_FRODO1344AES
p521_frodo1344aes 1.3.9999.99.65 OQS_OID_P521_FRODO1344AES
frodo1344shake 1.3.9999.99.68 OQS_OID_FRODO1344SHAKE
p521_frodo1344shake 1.3.9999.99.67 OQS_OID_P521_FRODO1344SHAKE
kyber512 1.3.6.1.4.1.22554.5.6.1 OQS_OID_KYBER512
p256_kyber512 1.3.6.1.4.1.22554.5.7.1 OQS_OID_P256_KYBER512
x25519_kyber512 1.3.6.1.4.1.22554.5.8.1 OQS_OID_X25519_KYBER512
kyber768 1.3.6.1.4.1.22554.5.6.2 OQS_OID_KYBER768
p384_kyber768 1.3.9999.99.69 OQS_OID_P384_KYBER768
x448_kyber768 1.3.9999.99.47 OQS_OID_X448_KYBER768
x25519_kyber768 1.3.9999.99.48 OQS_OID_X25519_KYBER768
p256_kyber768 1.3.9999.99.49 OQS_OID_P256_KYBER768
kyber1024 1.3.6.1.4.1.22554.5.6.3 OQS_OID_KYBER1024
p521_kyber1024 1.3.9999.99.70 OQS_OID_P521_KYBER1024
mlkem512 1.3.6.1.4.1.22554.5.6.1 OQS_OID_MLKEM512
p256_mlkem512 1.3.6.1.4.1.22554.5.7.1 OQS_OID_P256_MLKEM512
x25519_mlkem512 1.3.6.1.4.1.22554.5.8.1 OQS_OID_X25519_MLKEM512
mlkem768 1.3.6.1.4.1.22554.5.6.2 OQS_OID_MLKEM768
p384_mlkem768 1.3.9999.99.71 OQS_OID_P384_MLKEM768
x448_mlkem768 1.3.9999.99.50 OQS_OID_X448_MLKEM768
x25519_mlkem768 1.3.9999.99.51 OQS_OID_X25519_MLKEM768
p256_mlkem768 1.3.9999.99.52 OQS_OID_P256_MLKEM768
mlkem1024 1.3.6.1.4.1.22554.5.6.3 OQS_OID_MLKEM1024
p521_mlkem1024 1.3.9999.99.72 OQS_OID_P521_MLKEM1024
bikel1 1.3.9999.99.74 OQS_OID_BIKEL1
p256_bikel1 1.3.9999.99.73 OQS_OID_P256_BIKEL1
x25519_bikel1 1.3.9999.99.53 OQS_OID_X25519_BIKEL1
bikel3 1.3.9999.99.76 OQS_OID_BIKEL3
p384_bikel3 1.3.9999.99.75 OQS_OID_P384_BIKEL3
x448_bikel3 1.3.9999.99.54 OQS_OID_X448_BIKEL3
bikel5 1.3.9999.99.78 OQS_OID_BIKEL5
p521_bikel5 1.3.9999.99.77 OQS_OID_P521_BIKEL5
hqc128 1.3.9999.99.80 OQS_OID_HQC128
p256_hqc128 1.3.9999.99.79 OQS_OID_P256_HQC128
x25519_hqc128 1.3.9999.99.55 OQS_OID_X25519_HQC128
hqc192 1.3.9999.99.82 OQS_OID_HQC192
p384_hqc192 1.3.9999.99.81 OQS_OID_P384_HQC192
x448_hqc192 1.3.9999.99.56 OQS_OID_X448_HQC192
hqc256 1.3.9999.99.84 OQS_OID_HQC256
p521_hqc256 1.3.9999.99.83 OQS_OID_P521_HQC256

Key Encodings

By setting environment variables, oqs-provider can be configured to encode keys (subjectPublicKey and and privateKey ASN.1 structures) according to the following IETF drafts:

Environment Variable Permissible Values
OQS_ENCODING_DILITHIUM2 draft-uni-qsckeys-dilithium-00/sk-pk
OQS_ENCODING_DILITHIUM3 draft-uni-qsckeys-dilithium-00/sk-pk
OQS_ENCODING_DILITHIUM5 draft-uni-qsckeys-dilithium-00/sk-pk
OQS_ENCODING_FALCON512 draft-uni-qsckeys-falcon-00/sk-pk
OQS_ENCODING_FALCON1024 draft-uni-qsckeys-falcon-00/sk-pk
OQS_ENCODING_SPHINCSSHA2128FSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHA2128SSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHA2192FSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHA2192SSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHA2256FSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHA2256SSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHAKE128FSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHAKE128SSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHAKE192FSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHAKE192SSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHAKE256FSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk
OQS_ENCODING_SPHINCSSHAKE256SSIMPLE draft-uni-qsckeys-sphincsplus-00/sk-pk

By setting OQS_ENCODING_<ALGORITHM>_ALGNAME environment variables, the corresponding algorithm names are set. The names are documented in the qsc_encoding.h header file of the encoder library.

If no environment variable is set, or if an unknown value is set, the default is 'no' encoding, meaning that key serialization uses the 'raw' keys of the crypto implementations. If unknown values are set as environment variables, a run-time error will be raised.

The test script scripts/runtests_encodings.sh (instead of scripts/runtests.sh) can be used for a test run with all supported encodings activated.