> echo "Proof I have your key. fedor@indutny.com" | openssl sha1 -sign key.pem -sha1 | openssl enc -base64 aKmd7OEXbTvlh6CQNczA+XYVsru4b4t1RMcHCqvjQOW3sxrLFX0laO47fks1G90c 6CtcQwYO06uVxwa9XAr8TAXbmZZj+kGoSNkRzpaNeeqqNkcvVUEv5dV5wy4Q2Mfr aL6YQSVCfbGGlU0SwBYKdI3cssfPPiClM+i9psi655zDYcgYDdZIvl3/XpGBHeKu CH9gmt9R9ey448IdZ2uCF+oX+KAogcl9AgpX7GPmJNXZWN13ASCjIFxPdQUguj5p Z1e8sv6DmenKABaWGmMtQDf/JAzHDCl8CaYlReXQW1wja3I4crD2tDqxq6+Hbajn SOUFr2XOSpuj5wGxlo20KA==