diff options
Diffstat (limited to 'lib/libcrypto/evp/e_bf.c')
| -rw-r--r-- | lib/libcrypto/evp/e_bf.c | 168 |
1 files changed, 163 insertions, 5 deletions
diff --git a/lib/libcrypto/evp/e_bf.c b/lib/libcrypto/evp/e_bf.c index 615c9bd7710..f4e0c4c0934 100644 --- a/lib/libcrypto/evp/e_bf.c +++ b/lib/libcrypto/evp/e_bf.c @@ -1,4 +1,4 @@ -/* $OpenBSD: e_bf.c,v 1.8 2014/07/11 08:44:48 jsing Exp $ */ +/* $OpenBSD: e_bf.c,v 1.9 2022/09/03 19:43:16 jsing Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * @@ -75,11 +75,169 @@ typedef struct { BF_KEY ks; } EVP_BF_KEY; -#define data(ctx) EVP_C_DATA(EVP_BF_KEY,ctx) +#define data(ctx) ((EVP_BF_KEY *)(ctx)->cipher_data) + +static int +bf_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) +{ + while (inl >= EVP_MAXCHUNK) { + BF_cbc_encrypt(in, out, (long)EVP_MAXCHUNK, &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->iv, ctx->encrypt); + inl -= EVP_MAXCHUNK; + in += EVP_MAXCHUNK; + out += EVP_MAXCHUNK; + } + + if (inl) + BF_cbc_encrypt(in, out, (long)inl, &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->iv, ctx->encrypt); + + return 1; +} + +static int +bf_cfb64_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) +{ + size_t chunk = EVP_MAXCHUNK; + + if (64 == 1) + chunk >>= 3; + + if (inl < chunk) + chunk = inl; + + while (inl && inl >= chunk) { + BF_cfb64_encrypt(in, out, (long)((64 == 1) && !(ctx->flags & EVP_CIPH_FLAG_LENGTH_BITS) ? inl * 8 : inl), &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num, ctx->encrypt); + inl -= chunk; + in += chunk; + out += chunk; + if (inl < chunk) + chunk = inl; + } + + return 1; +} + +static int +bf_ecb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) +{ + size_t i, bl; + + bl = ctx->cipher->block_size; + + if (inl < bl) + return 1; + + inl -= bl; + + for (i = 0; i <= inl; i += bl) + BF_ecb_encrypt(in + i, out + i, &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->encrypt); + + return 1; +} + +static int +bf_ofb_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out, const unsigned char *in, size_t inl) +{ + while (inl >= EVP_MAXCHUNK) { + BF_ofb64_encrypt(in, out, (long)EVP_MAXCHUNK, &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num); + inl -= EVP_MAXCHUNK; + in += EVP_MAXCHUNK; + out += EVP_MAXCHUNK; + } + + if (inl) + BF_ofb64_encrypt(in, out, (long)inl, &((EVP_BF_KEY *)ctx->cipher_data)->ks, ctx->iv, &ctx->num); + + return 1; +} + +static const EVP_CIPHER bf_cbc = { + .nid = NID_bf_cbc, + .block_size = 8, + .key_len = 16, + .iv_len = 8, + .flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CBC_MODE, + .init = bf_init_key, + .do_cipher = bf_cbc_cipher, + .cleanup = NULL, + .ctx_size = sizeof(EVP_BF_KEY), + .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, + .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, + .ctrl = NULL, + .app_data = NULL, +}; + +const EVP_CIPHER * +EVP_bf_cbc(void) +{ + return &bf_cbc; +} + +static const EVP_CIPHER bf_cfb64 = { + .nid = NID_bf_cfb64, + .block_size = 1, + .key_len = 16, + .iv_len = 8, + .flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_CFB_MODE, + .init = bf_init_key, + .do_cipher = bf_cfb64_cipher, + .cleanup = NULL, + .ctx_size = sizeof(EVP_BF_KEY), + .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, + .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, + .ctrl = NULL, + .app_data = NULL, +}; + +const EVP_CIPHER * +EVP_bf_cfb64(void) +{ + return &bf_cfb64; +} + +static const EVP_CIPHER bf_ofb = { + .nid = NID_bf_ofb64, + .block_size = 1, + .key_len = 16, + .iv_len = 8, + .flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_OFB_MODE, + .init = bf_init_key, + .do_cipher = bf_ofb_cipher, + .cleanup = NULL, + .ctx_size = sizeof(EVP_BF_KEY), + .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, + .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, + .ctrl = NULL, + .app_data = NULL, +}; + +const EVP_CIPHER * +EVP_bf_ofb(void) +{ + return &bf_ofb; +} + +static const EVP_CIPHER bf_ecb = { + .nid = NID_bf_ecb, + .block_size = 8, + .key_len = 16, + .iv_len = 0, + .flags = EVP_CIPH_VARIABLE_LENGTH | EVP_CIPH_ECB_MODE, + .init = bf_init_key, + .do_cipher = bf_ecb_cipher, + .cleanup = NULL, + .ctx_size = sizeof(EVP_BF_KEY), + .set_asn1_parameters = EVP_CIPHER_set_asn1_iv, + .get_asn1_parameters = EVP_CIPHER_get_asn1_iv, + .ctrl = NULL, + .app_data = NULL, +}; + +const EVP_CIPHER * +EVP_bf_ecb(void) +{ + return &bf_ecb; +} -IMPLEMENT_BLOCK_CIPHER(bf, ks, BF, EVP_BF_KEY, NID_bf, 8, 16, 8, 64, - EVP_CIPH_VARIABLE_LENGTH, bf_init_key, NULL, - EVP_CIPHER_set_asn1_iv, EVP_CIPHER_get_asn1_iv, NULL) static int bf_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key, |