diff options
Diffstat (limited to 'crypto/evp')
| -rw-r--r-- | crypto/evp/asymcipher.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/crypto/evp/asymcipher.c b/crypto/evp/asymcipher.c index 3acf4d1dfd..ca2a8ebdf2 100644 --- a/crypto/evp/asymcipher.c +++ b/crypto/evp/asymcipher.c @@ -298,6 +298,24 @@ int EVP_PKEY_decrypt(EVP_PKEY_CTX *ctx, return ctx->pmeth->decrypt(ctx, out, outlen, in, inlen); } +/* decrypt to new buffer of dynamic size, checking any pre-determined size */ +int evp_pkey_decrypt_alloc(EVP_PKEY_CTX *ctx, unsigned char **outp, + size_t *outlenp, size_t expected_outlen, + const unsigned char *in, size_t inlen) +{ + if (EVP_PKEY_decrypt(ctx, NULL, outlenp, in, inlen) <= 0 + || (*outp = OPENSSL_malloc(*outlenp)) == NULL) + return -1; + if (EVP_PKEY_decrypt(ctx, *outp, outlenp, in, inlen) <= 0 + || *outlenp == 0 + || (expected_outlen != 0 && *outlenp != expected_outlen)) { + ERR_raise(ERR_LIB_EVP, ERR_R_EVP_LIB); + OPENSSL_clear_free(*outp, *outlenp); + *outp = NULL; + return 0; + } + return 1; +} static EVP_ASYM_CIPHER *evp_asym_cipher_new(OSSL_PROVIDER *prov) { |