The SN is a short name; the LN is a long name, typically the name in some lousy standard somewhere, (or sometimes capitalized name).
#define SN_undef "UNDEF"
#define LN_undef "undefined"
#define NID_undef 0
#define SN_Algorithm "Algorithm"
#define LN_algorithm "algorithm"
#define NID_algorithm 38
#define LN_rsadsi "rsadsi"
#define NID_rsadsi 1
#define LN_pkcs "pkcs"
#define NID_pkcs 2
#define SN_md2 "MD2"
#define LN_md2 "md2"
#define NID_md2 3
#define SN_md5 "MD5"
#define LN_md5 "md5"
#define NID_md5 4
#define SN_rc4 "RC4"
#define LN_rc4 "rc4"
#define NID_rc4 5
#define LN_rsaEncryption "rsaEncryption"
#define NID_rsaEncryption 6
#define SN_md2WithRSAEncryption "RSA-MD2"
#define LN_md2WithRSAEncryption "md2WithRSAEncryption"
#define NID_md2WithRSAEncryption 7
#define SN_md5WithRSAEncryption "RSA-MD5"
#define LN_md5WithRSAEncryption "md5WithRSAEncryption"
#define NID_md5WithRSAEncryption 8
#define LN_pbeWithMD2AndDES_CBC "pbeWithMD2AndDES-CBC"
#define NID_pbeWithMD2AndDES_CBC 9
#define LN_pbeWithMD5AndDES_CBC "pbeWithMD5AndDES-CBC"
#define NID_pbeWithMD5AndDES_CBC 10
#define LN_X500 "X500"
#define NID_X500 11
#define LN_X509 "X509"
#define NID_X509 12
#define SN_commonName "CN"
#define LN_commonName "commonName"
#define NID_commonName 13
#define SN_countryName "C"
#define LN_countryName "countryName"
#define NID_countryName 14
#define SN_localityName "L"
#define LN_localityName "localityName"
#define NID_localityName 15
/* should be "ST" (rfc1327) but MS uses 'S' */
#define SN_stateOrProvinceName "ST"
#define LN_stateOrProvinceName "stateOrProvinceName"
#define NID_stateOrProvinceName 16
#define SN_organizationName "O"
#define LN_organizationName "organizationName"
#define NID_organizationName 17
#define SN_organizationalUnitName "OU"
#define LN_organizationalUnitName "organizationalUnitName"
#define NID_organizationalUnitName 18
#define SN_rsa "RSA"
#define LN_rsa "rsa"
#define NID_rsa 19
#define LN_pkcs7 "pkcs7"
#define NID_pkcs7 20
#define LN_pkcs7_data "pkcs7-data"
#define NID_pkcs7_data 21
#define LN_pkcs7_signed "pkcs7-signedData"
#define NID_pkcs7_signed 22
#define LN_pkcs7_enveloped "pkcs7-envelopedData"
#define NID_pkcs7_enveloped 23
#define LN_pkcs7_signedAndEnveloped "pkcs7-signedAndEnvelopedData"
#define NID_pkcs7_signedAndEnveloped 24
#define LN_pkcs7_digest "pkcs7-digestData"
#define NID_pkcs7_digest 25
#define LN_pkcs7_encrypted "pkcs7-encryptedData"
#define NID_pkcs7_encrypted 26
#define LN_pkcs3 "pkcs3"
#define NID_pkcs3 27
#define LN_dhKeyAgreement "dhKeyAgreement"
#define NID_dhKeyAgreement 28
#define SN_des_ecb "DES-ECB"
#define LN_des_ecb "des-ecb"
#define NID_des_ecb 29
#define SN_des_cfb64 "DES-CFB"
#define LN_des_cfb64 "des-cfb"
#define NID_des_cfb64 30
#define SN_des_cbc "DES-CBC"
#define LN_des_cbc "des-cbc"
#define NID_des_cbc 31
#define SN_des_ede "DES-EDE"
#define LN_des_ede "des-ede"
#define NID_des_ede 32
#define SN_des_ede3 "DES-EDE3"
#define LN_des_ede3 "des-ede3"
#define NID_des_ede3 33
#define SN_idea_cbc "IDEA-CBC"
#define LN_idea_cbc "idea-cbc"
#define NID_idea_cbc 34
#define SN_idea_cfb64 "IDEA-CFB"
#define LN_idea_cfb64 "idea-cfb"
#define NID_idea_cfb64 35
#define SN_idea_ecb "IDEA-ECB"
#define LN_idea_ecb "idea-ecb"
#define NID_idea_ecb 36
#define SN_rc2_cbc "RC2-CBC"
#define LN_rc2_cbc "rc2-cbc"
#define NID_rc2_cbc 37
#define SN_rc2_ecb "RC2-ECB"
#define LN_rc2_ecb "rc2-ecb"
#define NID_rc2_ecb 38
#define SN_rc2_cfb64 "RC2-CFB"
#define LN_rc2_cfb64 "rc2-cfb"
#define NID_rc2_cfb64 39
#define SN_rc2_ofb64 "RC2-OFB"
#define LN_rc2_ofb64 "rc2-ofb"
#define NID_rc2_ofb64 40
#define SN_sha "SHA"
#define LN_sha "sha"
#define NID_sha 41
#define SN_shaWithRSAEncryption "RSA-SHA"
#define LN_shaWithRSAEncryption "shaWithRSAEncryption"
#define NID_shaWithRSAEncryption 42
#define SN_des_ede_cbc "DES-EDE-CBC"
#define LN_des_ede_cbc "des-ede-cbc"
#define NID_des_ede_cbc 43
#define SN_des_ede3_cbc "DES-EDE3-CBC"
#define LN_des_ede3_cbc "des-ede3-cbc"
#define NID_des_ede3_cbc 44
#define SN_des_ofb64 "DES-OFB"
#define LN_des_ofb64 "des-ofb"
#define NID_des_ofb64 45
#define SN_idea_ofb64 "IDEA-OFB"
#define LN_idea_ofb64 "idea-ofb"
#define NID_idea_ofb64 46
#define LN_pkcs9 "pkcs9"
#define NID_pkcs9 47
#define SN_pkcs9_emailAddress "Email"
#define LN_pkcs9_emailAddress "emailAddress"
#define NID_pkcs9_emailAddress 48
#define LN_pkcs9_unstructuredName "unstructuredName"
#define NID_pkcs9_unstructuredName 49
#define LN_pkcs9_contentType "contentType"
#define NID_pkcs9_contentType 50
#define LN_pkcs9_messageDigest "messageDigest"
#define NID_pkcs9_messageDigest 51
#define LN_pkcs9_signingTime "signingTime"
#define NID_pkcs9_signingTime 52
#define LN_pkcs9_countersignature "countersignature"
#define NID_pkcs9_countersignature 53
#define LN_pkcs9_challengePassword "challengePassword"
#define NID_pkcs9_challengePassword 54
#define LN_pkcs9_unstructuredAddress "unstructuredAddress"
#define NID_pkcs9_unstructuredAddress 55
#define LN_pkcs9_extCertAttributes "extendedCertificateAttributes"
#define NID_pkcs9_extCertAttributes 56
#define SN_netscape "Netscape"
#define LN_netscape "Netscape Communications Corp."
#define NID_netscape 57
#define SN_netscape_cert_extension "nsCertExt"
#define LN_netscape_cert_extension "Netscape Certificate Extension"
#define NID_netscape_cert_extension 58
#define SN_netscape_data_type "nsDataType"
#define LN_netscape_data_type "Netscape Data Type"
#define NID_netscape_data_type 59
#define SN_des_ede_cfb64 "DES-EDE-CFB"
#define LN_des_ede_cfb64 "des-ede-cfb"
#define NID_des_ede_cfb64 60
#define SN_des_ede3_cfb64 "DES-EDE3-CFB"
#define LN_des_ede3_cfb64 "des-ede3-cfb"
#define NID_des_ede3_cfb64 61
#define SN_des_ede_ofb64 "DES-EDE-OFB"
#define LN_des_ede_ofb64 "des-ede-ofb"
#define NID_des_ede_ofb64 62
#define SN_des_ede3_ofb64 "DES-EDE3-OFB"
#define LN_des_ede3_ofb64 "des-ede3-ofb"
#define NID_des_ede3_ofb64 63
/* I'm not sure about the object ID */
#define SN_sha1 "SHA1"
#define LN_sha1 "sha1"
#define NID_sha1 64
#define SN_sha1WithRSAEncryption "RSA-SHA1"
#define LN_sha1WithRSAEncryption "sha1WithRSAEncryption"
#define NID_sha1WithRSAEncryption 65
#define SN_dsaWithSHA "DSA-SHA"
#define LN_dsaWithSHA "dsaWithSHA"
#define NID_dsaWithSHA 66
#define SN_dsa_2 "DSA-old"
#define LN_dsa_2 "dsaEncryption-old"
#define NID_dsa_2 67
/* proposed by microsoft to RSA */
#define LN_pbeWithSHA1AndRC2_CBC "pbeWithSHA1AndRC2-CBC"
#define NID_pbeWithSHA1AndRC2_CBC 68
/* proposed by microsoft to RSA */
#define LN_pbeWithSHA1AndRC4 "pbeWithSHA1AndRC4"
#define NID_pbeWithSHA1AndRC4 69
#define SN_dsaWithSHA1_2 "DSA-SHA1-old"
#define LN_dsaWithSHA1_2 "dsaWithSHA1"
#define NID_dsaWithSHA1_2 70
#define SN_netscape_cert_type "nsCertType"
#define LN_netscape_cert_type "Netscape Cert Type"
#define NID_netscape_cert_type 71
#define SN_netscape_base_url "nsBaseUrl"
#define LN_netscape_base_url "Netscape Base Url"
#define NID_netscape_base_url 72
#define SN_netscape_revocation_url "nsRevocationUrl"
#define LN_netscape_revocation_url "Netscape Revocation Url"
#define NID_netscape_revocation_url 73
#define SN_netscape_ca_revocation_url "nsCaRevocationUrl"
#define LN_netscape_ca_revocation_url "Netscape CA Revocation Url"
#define NID_netscape_ca_revocation_url 74
#define SN_netscape_renewal_url "nsRenewalUrl"
#define LN_netscape_renewal_url "Netscape Renewal Url"
#define NID_netscape_renewal_url 75
#define SN_netscape_ca_policy_url "nsCaPolicyUrl"
#define LN_netscape_ca_policy_url "Netscape CA Policy Url"
#define NID_netscape_ca_policy_url 76
#define SN_netscape_ssl_server_name "nsSslServerName"
#define LN_netscape_ssl_server_name "Netscape SSL Server Name"
#define NID_netscape_ssl_server_name 77
#define SN_netscape_comment "nsComment"
#define LN_netscape_comment "Netscape Comment"
#define NID_netscape_comment 78
#define SN_netscape_cert_sequence "nsCertSequence"
#define LN_netscape_cert_sequence "Netscape Certificate Sequence"
#define NID_netscape_cert_sequence 79
#define SN_desx_cbc "DESX-CBC"
#define LN_desx_cbc "desx-cbc"
#define NID_desx_cbc 80
#define SN_ld_ce "ld-ce"
#define NID_ld_ce 81
#define SN_subject_key_identifier "subjectKeyIdentifier"
#define LN_subject_key_identifier "X509v3 Subject Key Identifier"
#define NID_subject_key_identifier 82
#define SN_key_usage "keyUsage"
#define LN_key_usage "X509v3 Key Usage"
#define NID_key_usage 83
#define SN_private_key_usage_period "privateKeyUsagePeriod"
#define LN_private_key_usage_period "X509v3 Private Key Usage Period"
#define NID_private_key_usage_period 84
#define SN_subject_alt_name "subjectAltName"
#define LN_subject_alt_name "X509v3 Subject Alternative Name"
#define NID_subject_alt_name 85
#define SN_issuer_alt_name "issuerAltName"
#define LN_issuer_alt_name "X509v3 Issuer Alternative Name"
#define NID_issuer_alt_name 86
#define SN_basic_constraints "basicConstraints"
#define LN_basic_constraints "X509v3 Basic Constraints"
#define NID_basic_constraints 87
#define SN_crl_number "crlNumber"
#define LN_crl_number "X509v3 CRL Number"
#define NID_crl_number 88
#define SN_certificate_policies "certificatePolicies"
#define LN_certificate_policies "X509v3 Certificate Policies"
#define NID_certificate_policies 89
#define SN_authority_key_identifier "authorityKeyIdentifier"
#define LN_authority_key_identifier "X509v3 Authority Key Identifier"
#define NID_authority_key_identifier 90
#define SN_bf_cbc "BF-CBC"
#define LN_bf_cbc "bf-cbc"
#define NID_bf_cbc 91
#define SN_bf_ecb "BF-ECB"
#define LN_bf_ecb "bf-ecb"
#define NID_bf_ecb 92
#define SN_bf_cfb64 "BF-CFB"
#define LN_bf_cfb64 "bf-cfb"
#define NID_bf_cfb64 93
#define SN_bf_ofb64 "BF-OFB"
#define LN_bf_ofb64 "bf-ofb"
#define NID_bf_ofb64 94
#define SN_mdc2 "MDC2"
#define LN_mdc2 "mdc2"
#define NID_mdc2 95
#define SN_mdc2WithRSA "RSA-MDC2"
#define LN_mdc2WithRSA "mdc2withRSA"
#define NID_mdc2WithRSA 96
#define SN_rc4_40 "RC4-40"
#define LN_rc4_40 "rc4-40"
#define NID_rc4_40 97
#define SN_rc2_40_cbc "RC2-40-CBC"
#define LN_rc2_40_cbc "rc2-40-cbc"
#define NID_rc2_40_cbc 98
#define SN_givenName "G"
#define LN_givenName "givenName"
#define NID_givenName 99
#define SN_surname "S"
#define LN_surname "surname"
#define NID_surname 100
#define SN_initials "I"
#define LN_initials "initials"
#define NID_initials 101
#define SN_uniqueIdentifier "UID"
#define LN_uniqueIdentifier "uniqueIdentifier"
#define NID_uniqueIdentifier 102
#define SN_crl_distribution_points "crlDistributionPoints"
#define LN_crl_distribution_points "X509v3 CRL Distribution Points"
#define NID_crl_distribution_points 103
#define SN_md5WithRSA "RSA-NP-MD5"
#define LN_md5WithRSA "md5WithRSA"
#define NID_md5WithRSA 104
#define SN_serialNumber "SN"
#define LN_serialNumber "serialNumber"
#define NID_serialNumber 105
#define SN_title "T"
#define LN_title "title"
#define NID_title 106
#define SN_description "D"
#define LN_description "description"
#define NID_description 107
/* CAST5 is CAST-128, I'm just sticking with the documentation */
#define SN_cast5_cbc "CAST5-CBC"
#define LN_cast5_cbc "cast5-cbc"
#define NID_cast5_cbc 108
#define SN_cast5_ecb "CAST5-ECB"
#define LN_cast5_ecb "cast5-ecb"
#define NID_cast5_ecb 109
#define SN_cast5_cfb64 "CAST5-CFB"
#define LN_cast5_cfb64 "cast5-cfb"
#define NID_cast5_cfb64 110
#define SN_cast5_ofb64 "CAST5-OFB"
#define LN_cast5_ofb64 "cast5-ofb"
#define NID_cast5_ofb64 111
#define LN_pbeWithMD5AndCast5_CBC "pbeWithMD5AndCast5CBC"
#define NID_pbeWithMD5AndCast5_CBC 112
/* This is one sun will soon be using :-(
* id-dsa-with-sha1 ID ::= {
* iso(1) member-body(2) us(840) x9-57 (10040) x9cm(4) 3 }
*/
#define SN_dsaWithSHA1 "DSA-SHA1"
#define LN_dsaWithSHA1 "dsaWithSHA1"
#define NID_dsaWithSHA1 113
#define NID_md5_sha1 114
#define SN_md5_sha1 "MD5-SHA1"
#define LN_md5_sha1 "md5-sha1"
#define SN_sha1WithRSA "RSA-SHA1-2"
#define LN_sha1WithRSA "sha1WithRSA"
#define NID_sha1WithRSA 115
#define SN_dsa "DSA"
#define LN_dsa "dsaEncryption"
#define NID_dsa 116
#define SN_ripemd160 "RIPEMD160"
#define LN_ripemd160 "ripemd160"
#define NID_ripemd160 117
/* The name should actually be rsaSignatureWithripemd160, but I'm going
* to contiune using the convention I'm using with the other ciphers */
#define SN_ripemd160WithRSA "RSA-RIPEMD160"
#define LN_ripemd160WithRSA "ripemd160WithRSA"
#define NID_ripemd160WithRSA 119
#define SN_rc5_cbc "RC5-CBC"
#define LN_rc5_cbc "rc5-cbc"
#define NID_rc5_cbc 120
#define SN_rc5_ecb "RC5-ECB"
#define LN_rc5_ecb "rc5-ecb"
#define NID_rc5_ecb 121
#define SN_rc5_cfb64 "RC5-CFB"
#define LN_rc5_cfb64 "rc5-cfb"
#define NID_rc5_cfb64 122
#define SN_rc5_ofb64 "RC5-OFB"
#define LN_rc5_ofb64 "rc5-ofb"
#define NID_rc5_ofb64 123